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Lathe change

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Bill - 04 Sep 2008 22:54 GMT
I have a very old ML7 no gear box, no cross feed, no coolant. I am thinking
of changing it but with what ? About same size but with gear box and cross
feed, also would like to take bigger cuts. Any suggestions welcome
Mark Rand - 04 Sep 2008 23:46 GMT
>I have a very old ML7 no gear box, no cross feed, no coolant. I am thinking
>of changing it but with what ? About same size but with gear box and cross
>feed, also would like to take bigger cuts. Any suggestions welcome

In order of likelyhood:-

Boxford AUD
Colchester Student
Colchester Bantam
Super 7B with cross feed
Conny Sewer
Hardinge HLV(-H if you can get it))

Probably lots of others.

Whatever comes up on fleabay/goindustry/etc that looks to be acceptable

Regards
Mark Rand
RTFM
Stephen Howard - 05 Sep 2008 01:03 GMT
>>I have a very old ML7 no gear box, no cross feed, no coolant. I am thinking
>>of changing it but with what ? About same size but with gear box and cross
[quoted text clipped - 12 lines]
>
>Whatever comes up on fleabay/goindustry/etc that looks to be acceptable

I'm very happy with my Emco Maximat V10, which replaced a Super 7.
Little bit larger, longer bed - and a simple mill attachment.

Regards,

Signature

Stephen Howard - Woodwind repairs & period restorations
http://www.shwoodwind.co.uk
Emails to: showard{who is at}shwoodwind{dot}co{dot}uk

Austin Shackles - 05 Sep 2008 10:31 GMT
>>I have a very old ML7 no gear box, no cross feed, no coolant. I am thinking
>>of changing it but with what ? About same size but with gear box and cross
[quoted text clipped - 8 lines]
>Conny Sewer
>Hardinge HLV(-H if you can get it))

Harrison L5?

Colchester Chipmaster, if you can find a good'un, especially if the variator
works.  In fact, unless it's been rebuilt with a variable speed motor, it's
essential that the variator works.  very nice little lathe though, if in
working order.

The student is a bit big, compared with a Myford.
Signature

Austin Shackles.  www.ddol-las.net  my opinions are just that
Travel The Galaxy!  Meet Fascinating Life Forms...
------------------------------------------------\  
  >>  http://www.schlockmercenary.com/  <<      \  ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!

Peter Fairbrother - 05 Sep 2008 11:26 GMT
>>> I have a very old ML7 no gear box, no cross feed, no coolant. I am thinking
>>> of changing it but with what ? About same size but with gear box and cross
[quoted text clipped - 17 lines]
>
> The student is a bit big, compared with a Myford.

They are *all* a bit big compared with a Myford. A Myford will fit
comfortably on a tabletop - the rest won't.

-- Peter Fairbrother
Austin Shackles - 05 Sep 2008 14:42 GMT
>>>> I have a very old ML7 no gear box, no cross feed, no coolant. I am thinking
>>>> of changing it but with what ? About same size but with gear box and cross
[quoted text clipped - 20 lines]
>They are *all* a bit big compared with a Myford. A Myford will fit
>comfortably on a tabletop - the rest won't.

then again, most come with a nice solid stand, which is good.

The boxfords, unless they're UD models, aren't necessarily on stands.

I guess you could unbolt the student from it's stand/cabinet and put it on a
table, if you had a strong enough table.

The chipmaster is only 3x20, but it's well solid.  
Signature

Austin Shackles.  www.ddol-las.net  my opinions are just that
Travel The Galaxy!  Meet Fascinating Life Forms...
------------------------------------------------\  
  >>  http://www.schlockmercenary.com/  <<      \  ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!

Peter Neill - 05 Sep 2008 15:13 GMT
>The chipmaster is only 3x20, but it's well solid.  

I think you made a typo there<g>, as I'm sure it's 5.75" x 20", same
as the Bantam.

Peter
Austin Shackles - 06 Sep 2008 10:35 GMT
>>The chipmaster is only 3x20, but it's well solid.  
>
>I think you made a typo there<g>, as I'm sure it's 5.75" x 20", same
>as the Bantam.

yeah.  5x20.  it says so on the machine, chances are it'll go a tad over 5.

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=140264039299

for example, although I'd be a bit wary of a noisy variator, although the
advice give in the excellent lathes.co.uk
(http://www.lathes.co.uk/chipmaster/) is a touch contradictory on this point
- untoward noises are bad but they are "rarely silent".

He goes on to suggest that they mostly end up being converted to electronic,
and further describes someone who over-rated one to run at 4000 rpm.

Signature

Austin Shackles.  www.ddol-las.net  my opinions are just that
Travel The Galaxy!  Meet Fascinating Life Forms...
------------------------------------------------\  
  >>  http://www.schlockmercenary.com/  <<      \  ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!

Charles Ping - 06 Sep 2008 11:27 GMT
>>>The chipmaster is only 3x20, but it's well solid.  
>>
[quoted text clipped - 12 lines]
>He goes on to suggest that they mostly end up being converted to electronic,
>and further describes someone who over-rated one to run at 4000 rpm.

Aisde from being well made the Chipmaster has a good reduction from a
back gear so a modern VFD works OK when the variator gives up. I've
known it be done and work well although how good it'll be at 100rpm
big cuts is open to debate - but if you're used to a Myford then it's
a hypothetical worry

Charles
Mark Rand - 05 Sep 2008 19:11 GMT
>>>> I have a very old ML7 no gear box, no cross feed, no coolant. I am thinking
>>>> of changing it but with what ? About same size but with gear box and cross
[quoted text clipped - 22 lines]
>
>-- Peter Fairbrother

My sense of proportion might by slightly skewed by the fact that I migrated
from my short bed ML7 to ex-father's long bed 7B (that he claimed to have
bought for my 9th birthday :).

Having fitted it to a stand, the other lathes _are_ bigger than it. But not
necessarily vastly so.

Case in point. The long bed ML7B is 24"x55" on its stand, the Hardinge HLV is
8" longer and 5" deeper. The reason for suggesting the "upgrade" is that the
Myford weight in at 5cwt and the HLV tips the scales at half a long ton.
Similarly with other "small industrial" lathes. That weight difference can
make a big difference to the amount of swarf that you can produce in an
evening.

If one were really stuck on the concept of small enough to live on the table,
then a gearbox and power crossfeed would be gilding the lily and wouldn't fit
the last desire to take bigger cuts.

Mark Rand
RTFM
Peter Fairbrother - 06 Sep 2008 01:16 GMT
>>>>> I have a very old ML7 no gear box, no cross feed, no coolant. I am thinking
>>>>> of changing it but with what ? About same size but with gear box and cross
[quoted text clipped - 34 lines]
> make a big difference to the amount of swarf that you can produce in an
> evening.

Nyah nyah nyah - of course I want a HLV-H, and I'd make room for one at
a shot, but I can't afford more than a grand or so - which is unlikely.
How many do you have now?

 sad and jealous  :)

BTW, do you still have any of that 95 mm dia black EN24T left? Can I buy
150 mm from you?

> If one were really stuck on the concept of small enough to live on the table,
> then a gearbox and power crossfeed would be gilding the lily and wouldn't fit
> the last desire to take bigger cuts.

Yuss.

-- Peter Fairbrother
Mark Rand - 06 Sep 2008 01:25 GMT
>> Case in point. The long bed ML7B is 24"x55" on its stand, the Hardinge HLV is
>> 8" longer and 5" deeper. The reason for suggesting the "upgrade" is that the
[quoted text clipped - 6 lines]
>a shot, but I can't afford more than a grand or so - which is unlikely.
>How many do you have now?

It's only an HLV and it cost me about £250 (plus two years so far rebuilding
it without seeing it run yet...)

>  sad and jealous  :)
>
>BTW, do you still have any of that 95 mm dia black EN24T left? Can I buy
>150 mm from you?

Still got some, but it's not EN24T, just EN24 i.e. Black and annealed. Doesn't
machine as nicely as the heat treated EN24T, but doesn't affect the final
result if it needs heat treating afterwards.

I'll get a length in the post for Monday if you want.

Mark Rand
RTFM
jontom_1uk@hotmail.com - 06 Sep 2008 11:47 GMT
Snipped Interesting Stuff

> It's only an HLV and it cost me about £250 (plus two years so far rebuilding
> it without seeing it run yet...)
>
> Mark Rand
> RTFM

Mark, in reading your comment here I thought it must be at least 4 or
5 months since our last update on Dovetail grinding etc as related to
"just an HLV". Have you made progress or indeed finished the bed re-
build? Apologies if I have missed an update but family diversions make
my forum access irregular at the moment. I am always on the lookout
for such a machine (at a similar price :-)) but even if I fell over
one at the moment I would lack the confidence that it can be "sorted"
without spending something a fortune.

Regards

Keith (interested but impoverished of Wales)
Charles Ping - 06 Sep 2008 17:59 GMT
>Snipped Interesting Stuff
>
[quoted text clipped - 16 lines]
>
>Keith (interested but impoverished of Wales)

Keith

One of the big benefits of a Hardinge is that the bed ways are
removable and therefore easily taken off for regrinding. The fact that
Mark chose to do it the hard way with an undersize surface grinder
shouldn't put you off!

Charles

http://www.homeworkshop.org.uk
jontom_1uk@hotmail.com - 06 Sep 2008 19:16 GMT
On 6 Sep, 17:59, Charles Ping <charles.p...@littlewrongs.org.uk>
wrote:

> >Snipped Interesting Stuff
>
[quoted text clipped - 29 lines]
>
> - Show quoted text -

Thanks Charles, I had forgotten that Mark chose the "advanced route"
for his rebuild. I think that there was an issue with regard to the
alignment of the dovetails being different from the alignment of bed
location dowels so I was interested in how the bed once removed was
aligned for grinding the dovetails given that they were obviously worn
and wouldn't provide a datum. The problem I have is there are few
local grinders with a machine large enough who will "fiddle about with
these one off jobs" and even if they do they will only do exactly as
they are told with no guarantee of accuracy, except for parallelism.

Not that I have found a suitable machine candidate yet you understand,
but I have (clears throat), found an HLV in the corner of a workshop
that looks very unloved and "well worn" - at least that was what I
told the guy who runs the place. :-) He just happened to mention that
they could well be moving early in the New Year and was moaning that
the scrap price might not hold up long enough for them to get anything
for it once they are able to get it out. I did say that I might well
be able to pay a bit more than that and clear it for free when the two
bloody great CNCs that currently lock it in are moved. I will have to
keep tabs on the place but don't at the moment want to appear too
interested and haven't even looked close enough to see exactly which
model it is. No, for anyone wondering, I can’t seem to remember
exactly where the place is :-)

Regards

Keith
Mark Rand - 06 Sep 2008 22:08 GMT
>>Snipped Interesting Stuff
>>
[quoted text clipped - 25 lines]
>
>Charles

It's actually 6 months almost to the day since I started the bed regrind. I
did the thickness and needed to take 6 thou off before I got below the wear
marks. Once I'd done that I could measure the wear on the dovetails. One
interesting thing that I discovered in so doing, was that the bed was not made
parallel to the piece of metal it started off as. There are non-wearing
vertical edges for the top 1/8" or so of the dovetails. The original plan had
been to use these as references when regrinding the dovetails. Unfortunately,
Messrs Hardinge put a 12 thou sideways slope on the dovetails with respect to
these verticals :-(.

I intend to regrind these vertical bits so that they are parallel to where the
bed should be. I can get this alignment from the unworn parts of the dovetails
at the very ends of the bed. The reason for correcting this original
sloppiness is so that I can use a fence on the sine vice to align the bed.

To align the bed to grind the verticals, I intend to accurately mount four
datum blocks on the bottom of the bed and adjust them on the surface table
until they're parallel to the correct line. Then I can mount the bed on the
vertical sine vice on the grinder and adjust the alignment with a dial gauge
against the datum blocks. Once I've ground one side, the other vertical edge
side and the dovetails can be referenced from the ground-in-place fence of the
sine vice.

It should be noted that AFAICT, Hardinge never intended the beds to be
reground. You're supposed to simply buy a new two piece bed and bolt it on.

A minor issue is the fact that I don't actually have a sine vice. I'm in the
process of making one based on a 6"x12" electromagnetic chuck that I have.

Unfortunately, pressures of work, spending weekends and holidays trying to
find the garden and stuff meant that I haven't yet finished the sine vice.

The recent deluges handily stopped all garden reclamation work for the year
:-)

Then to add insult to injury, I got distracted by making an electrically
heated salt bath to harden the apron gearbox gears. I spent a weekend
hardening them. More time fitting them, toolpost grinding journals, grinding
the width of some of them, finding that I hadn't allowed enough clearance for
most of them, trimming some and re-making two (too hard to recut). Then
discovering that Hardinge had originally bored some of the holes 3 thou too
small for the needle roller bearings they were using (explained the undersize,
shagged shaft though!) and so on.

Note to self:- Next time fit dowels in the gearbox bearing holes and
accurately measure the centre distances instead of making assumptions. Also
don't trust that any hole was originally the right size, even if there is a
bearing pressed into it :-(

I've got one more gear to finish trimming to get the running clearance to a
level that I'm happy with. Then after grinding the clutch bearing thrust races
to fit and making new brush caps for the motor and cleaning that up, I'll be
able to finally put the apron gearbox on the finished pile. Then I'll get back
to the bed.

There is progress, but it's not always in the right direction or speed. I
really want to get the job finished so that I can get on to rebuilding the
mill, which I was about to start before the HLV turned up!

_
Mark Rand
RTFM
Bill - 06 Sep 2008 23:59 GMT
Thanks to all the answered the question. Now I have another one for owners
of Boxford's, what are the like and which model is best.

>>>Snipped Interesting Stuff
>>>
[quoted text clipped - 114 lines]
> Mark Rand
> RTFM
jackary - 07 Sep 2008 12:02 GMT
> Thanks to all the answered the question. Now I have another one for owners
>
[quoted text clipped - 116 lines]
> > Mark Rand
> > RTFM

Mark,
Thank you for you description of work so far. I am sure it will be
great when you have finished it.
I fixed up my fairly worn Chipmaster in a more cruder way but it
worked out very well.  I posted
what I did in http://groups.yahoo.com/group/ColchesterLathe-User/message/1269
Here is an extract from it
The bed was worn about .006" lower at the headstock end, that is the
inverted vee for the saddle guide. I reasoned that the tailstock
guide was less worn and dismantled the tailstock and used it as a
guide for measuring wear. I used the tailstock base casting fitted
with a clock gauge and read along the saddle vee, you get a reading
showing the unworn section which is at the tailstock end. The plan
is to remove metal from the unworn end and get a zero reading
compared to the tailstock vee. I glued emery cloth to wooden slats
and used them as files. Crude but it worked quite well. Perhaps
diamond files might be better. The lathe can turn to .001" over
about 12" now quite ok for me, and has now stiff travel for the
saddle over the bed length. I have since gave it another going over
and got it pretty good all over. Its old but still very good.
Regards
Alan
jontom_1uk@hotmail.com - 07 Sep 2008 00:57 GMT
> On Sat, 06 Sep 2008 17:59:51 +0100, Charles Ping
>
[quoted text clipped - 94 lines]
>
> - Show quoted text -

Mark

Thank you very much for taking the time to provide such a
comprehensive insight to your rebuild, it has been extremely helpful
to me. You have also covered some areas where I had concerns caused by
stories I heard (20+ years ago) from the technicians that looked after
such machines. Their belief, not just with HLV, was that while
superbly engineered there was in fact a lot of "individual" fitting
with each of these toolroom machines. They also had stories of a
number of well engineered "fixes" that were obviously used to recover
minor production errors. I have also encountered the undersize bearing
housing in aerospace components, mainly to overcome the possibility of
differential expansion but, on one occasion" the rep said that it
allowed the use of cheaper "standard size" bearings and ground
shafting. Apparently, if anything shafting would be slightly
undersize, never oversize, with thin housing bearings the other way
round; therefore a "small degree" of pre-load would always ensure a
zero clearance bearing. In that instance it was not a problem as it
was a very short life component. I can't see yours being for the same
reason as I wouldn't think the production numbers were high enough.
This was over 20 years ago and I suspect production tolerances of even
basic items is much better nowadays.

I must say that my confidence is not improved as your bed problems
seem only a part of the issue. Perhaps I won't rush at a machine until
I can have a good look at it, even if cheap. I suspect like you, once
I owned it I would "have" to put it right no matter how long it took.
I should really continue to use my present machines until I can out
perform them rather than, as it is now, the other way round. Anyway
thanks again Mark, best of luck in your rebuild - it will be all
worthwhile in the end.

Best regards

Keith
ravensworth2674 - 07 Sep 2008 08:16 GMT
On 7 Sep, 00:57, jontom_...@hotmail.com wrote:

> > On Sat, 06 Sep 2008 17:59:51 +0100, Charles Ping
>
[quoted text clipped - 132 lines]
>
> - Show quoted text -

Getting old and somewhat able to stand back a bit, I wondered and
wandered.
I felt that I wasn't the only one here. The big question is just how
much worn out crap is being discussed.
At first glance, it suggests that more than one of you is the proud
possessor of a worn out lathe.

Assuming that the Myford ML7 has nothing worse than a worn bed, it can
be fixed for a perhaps £35.
If it has a worn spindle( as mine has) then it it is a different
matter altogether. However, replacing a dodgy old Myford
with a dodgier lathe which cannot be re furbished for less than the
price of a tank of fuel is another matter.

I may be rambling somewhat but I am the only one who has put a sort of
price on my comments. Again, I have actually got to the end of a
restoration project.

Maybe there is another 'cost accountant' who will add his two
pennorth.

Meantime, my kind regards

Norman
jontom_1uk@hotmail.com - 07 Sep 2008 09:28 GMT
On 7 Sep, 08:16, ravensworth2674 <nor...@n-atkinson.wanadoo.co.uk>
wrote:
> On 7 Sep, 00:57, jontom_...@hotmail.com wrote:
>
[quoted text clipped - 161 lines]
>
> - Show quoted text -

Hello Norm, unlike you to "stand back" unless you have been somewhere
exotic of course. While I take your point to a degree, the OP (Bill)
has never indicated (in what limited information he has given us) that
there is anything wrong with his "very old ML7" other than it has no
gearbox, no PCF, no coolant and doesn't take big enough cuts (yes I
know that might have eluded to problems but they weren't specified.
The one other piece of information he gave us was that the replacement
needed to be a similar size. I can't see how anyone given that limited
information could have suggested anything other than the lathes
mentioned. Although I asked about budget and critical requirements in
my first response, Bill provided no further information. Your
suggestion of rebuilding the ML7 while sound from a financial point of
view (if that is important to him - he hasn't said) would not have
provided, PCF, gearbox, coolant or the ability to take substantially
larger cuts. While many of the suggestions I felt were for much larger
machines that fell outside of one of his criteria he didn't come back
in to the discussion to clarify his need, and I had asked him about
available space as well. In fact, I though that the discussion
although diverted to the issues of rebuilding an older but very high
quality machine would be useful to indicate the type of work he might
encounter if he took that course. I am also disappointed that Bill's
subsequent question with regard to Boxfords is also, only in my
opinion of course, too open to ensure that he gets reasonable advice.
"What are they like" and "which model is best" creates more questions
than answers, (big ugly things with turny bits everywhere??) and I for
one can't answer that with any kind of reasonable advice. I know I am
limited but I need to know, what’s it going to be used for, what
materials will be used, what budget is available, is space an issue
does it have to go onto a bench, is coolant or a gearbox vital, does
he know enough about lathes to identify a reasonable machine etc etc
etc.

In short Norm, I think you are being a bit hard on us and the advice
that Bill has been given to date. Unless of course what Bill really
wants is for someone to offer him their own "perfect machine" that is
absolutely idea for him. If that is the case he might just get what he
deserves. If Bill reads this, apologies but such an open question
gives us very little to go on and means that many machines that might
be ideal for you are not mentioned at all. The question most often
posed and impossible to answer is "I want a lathe, which is the best".

Regards

Grumpy of Wales
ravensworth2674 - 07 Sep 2008 10:44 GMT
On 7 Sep, 09:28, jontom_...@hotmail.com wrote:
> On 7 Sep, 08:16, ravensworth2674 <nor...@n-atkinson.wanadoo.co.uk>
> wrote:
[quoted text clipped - 195 lines]
>
> - Show quoted text -

Keith,
        Of course we are both making assumptions because we both are
'wetting our fingers to find where North is'

I was thinking of the late Kenneth C Hart who as Martin Cleeve wrote
how he was made redundant and turned his hobby ML7 into a machine
which would provide him with a tidy income- until his death. It's all
there in 'Screwcutting in the Lathe'
He seemed to manage--- and mentioned the Hardinge. Poor bugger
couldn't afford a four jaw chuck but he still managed to work only
part time! One thing is certain, he didn't swop an accurate machine
for a cast off basket case no matter what it's antecedents were.

Thinks???? Should we leave it at that. Nah! let's have a bit of a wind
up. Years( who knows when) but I went for a Hardinge at an auction.
Bugger was bankrupt- you know 2 years of good days and the bank
manager was writing the 'obituary' on Stubbs Gazette. Anyway, it was
sold for £6500 plus auctioneers charges etc. I was 'out' long before
that.
I still have the £6500 or thereabouts. I bought, you might think
foolishly, a Castle in Spain.  Its present value is rather more than
the Hardinge. Quixotically, there are no Hardinge owners along 'our'
street!

Ah, well- can't win 'em all

Cheers

Norm
David Littlewood - 08 Sep 2008 10:00 GMT
In article
<e01c53b9-3b3d-408b-8ada-3f41ad496eb9@m73g2000hsh.googlegroups.com>,
jontom_1uk@hotmail.com writes

> Your
>suggestion of rebuilding the ML7 while sound from a financial point of
>view (if that is important to him - he hasn't said) would not have
>provided, PCF, gearbox, coolant or the ability to take substantially
>larger cuts.

Actually Keith, retro-fitting a Myford gearbox is quite feasible - I did
mine over 20 years ago when my skill level was (even) lower than now. Of
course, the price of the gearbox has risen and the OP might find it
makes more economic sense to trade in the ML7 for a decent S7B with pxf.
The price difference will probably be even more than the cost of the
gearbox, but he will have a better machine and pxf.

As an aside, pxf is the only thing I really miss on my older S7B. I do
wish that someone would do a decent conversion kit. I have pondered this
for many hours, and am convinced that a pivoted motor with worm on the
apron front, driving a worm wheel fitted between the cross slide and
handle, would in principle be quite feasible and not particularly
obtrusive. Personal circumstances make it difficult for me to do a lot
of trial-and-error development work at present though.

David
Signature

David Littlewood

ravensworth2674 - 08 Sep 2008 11:01 GMT
.David,
           Martin Cleeve did it. The write up was in ME in the 50's
That was for his ML7.

In an variation on a theme( apologies to Paganini) it is worth having
a look at the Pools Major which had a power cross feed coming out of
the lead screw and across the rear and onto another feed screw on the
back and ito the saddle.

I had one. Maybe lathes.co uk has enough on the subject.

Another variation is a variable speed motor direct onto the feed
screew. My 7 had a thingy on the leadscrew which was a 2880rpm, but
double geared down . Mine was BOC but I recall that Parvalux had
similar stuff.It is now on a mill drill!

Romping away, Cleeve is worth digging into in a Club or Public Library
for old ME's
He also had a gear box.for his ML7 which came out of his earlier
ML2/4.

I'm now appreciating the recollections and hope that they may stir an
interest.

Vaguely, Cleeve was made redundant and used his converted ML7 to make
special order screws. Gave him a better income than before!

Cheers David- hope that my ramblings help

Norm
ravensworth2674 - 08 Sep 2008 11:19 GMT
.Comments about late lamented Martin Cleeve are coming too fast for
these arthritic fingers to catch up. Sorry!

Some time back, i did get a lot of help to put Cleeve into the net.
Sadly, Magicalia came in and that was the end of my aspirations there.
Magicalia's promises are like pie crust!

Unquestionably, Cleeve had simple and cheap solutions to many
problems. Ramling on, there were fixed and running steadies. Milling
arbours and here, Cleeve hadn't a mill. Again, he made a gear box out
of bits and dividing gear etc etc.

In no way, does this denigrate other worthies but it gives another
approach. Today, with economic gloom facing many of you, it may be
worth ML7 owners doing a private exchange of his information.

Forgive me but my efforts failed and old age(78+) and infirmary( ?? )
have to be endured.

Norm
jontom_1uk@hotmail.com - 08 Sep 2008 13:12 GMT
> Actually Keith, retro-fitting a Myford gearbox is quite feasible - I did
> mine over 20 years ago when my skill level was (even) lower than now. Of
> course, the price of the gearbox has risen and the OP might find it
> makes more economic sense to trade in the ML7 for a decent S7B with pxf.
> The price difference will probably be even more than the cost of the
> gearbox, but he will have a better machine and pxf.

Totally agree David, but as you say the economics don't make sense if
you have to buy a gearbox at the current price. Even if you had a box
spare then I suspect that selling it and the old ML7 might well raise
enough to buy a fair S7 with PXF. There have been a couple of gearbox
designs to build yourself but of course depend on you having a lathe
capable of and equipped for the task.

I have found this discussion very interesting particularly with regard
to PXF. I have two Myford S7Bs equipped with PXF the first by design
and the second by chance of being in the right place at the right
time. If I'm honest, I really enjoy having the facility but don't use
it all the time. The premium one is expected to pay for such a machine
is very high and with my first S7B PXF, the only way I could afford it
(kids about to go to uni at the time) was to pick a machine that was
in excellent condition except that it had a few chunks out of the bed
near the headstock. This damage to the bed makes no difference at all
to the accuracy of the lathe yet dropped the price by several hundred
pounds. The strange thing is that although I now have a much newer one
that is in superb condition it is the older one I use all the time.
What I'm getting at is that quite often with Myfords people actually
look to buy an "exhibition piece" rather than a good workable lathe.
If you are prepared to accept some cosmetic imperfections then I have
seen several S7B PXFs sell for quite a bit less than £1000. In fact,
although I planned to get rid of it when the new one fell into my
grasp I won't. When the bed shows signs of wear I will get Myford to
regrind it complete with missing chunks and continue to be comfortable
using and abusing it daily.

> As an aside, pxf is the only thing I really miss on my older S7B. I do
> wish that someone would do a decent conversion kit. I have pondered this
[quoted text clipped - 5 lines]
>
> David

There used to be a conversion kit available at least for the ML7 I
think and you see them from time to time on secondhand machines. With
modern small DC motors and fancy electronic speed control I don't
understand why someone hasn't at least tried the market. I guess if
you had the money to invest in buying 1000 sets form the Chinese they
might be cheap enough to be popular, although I still doubt they would
make you a fortune. I also agree that a mechanical system should be
workable but feel that a small DC motor/clutch and electronics would
be easier to set up.

Interesting

Keith
Austin Shackles - 06 Sep 2008 10:42 GMT
>Nyah nyah nyah - of course I want a HLV-H, and I'd make room for one at
>a shot, but I can't afford more than a grand or so - which is unlikely.
>How many do you have now?

Ebay item:

330268377847

Student 1800, BiN at 990.  Looks good.
Signature

Austin Shackles.  www.ddol-las.net  my opinions are just that
Travel The Galaxy!  Meet Fascinating Life Forms...
------------------------------------------------\  
  >>  http://www.schlockmercenary.com/  <<      \  ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!

Roland Craven - 07 Sep 2008 11:28 GMT
Gentlemen
A fascinating thread but please, I beg you, snip.

thanks
Signature

Roland Craven
Nr. Exeter, Devon, UK
roland@petternut.co.uk
www.petternut.co.uk

Bill - 07 Sep 2008 22:33 GMT
I got the answer to the question, and therefore did not look further in to
the topic as it went to a lathe rebuild. If this is upset members of the
group I am sorry. As I say I got the answer with a list of lathes and will
look at them.
> Gentlemen
> A fascinating thread but please, I beg you, snip.
>
> thanks
jontom_1uk@hotmail.com - 07 Sep 2008 23:06 GMT
> I got the answer to the question, and therefore did not look further in to
> the topic as it went to a lathe rebuild. If this is upset members of the
> group I am sorry. As I say I got the answer with a list of lathes and will
> look at them

Bill, I don't think anyone was upset (well I certainly wasn’t) but
perhaps a little frustrated at not being able to give well directed
advice as your question didn't give a clear picture of what you need
to do with the lathe; what is important to you, or of any constraints
you may have. In the end, the Boxford (like many of the other
suggestions and indeed the ML7) is a very fair "Jack of All Trades"
machine that will do most jobs within its capacity reasonably well. If
that is what you need then everyone will be happy. I think the
discussion proves that the group strives to provide good, well
balanced and un-biased advice; it is just easier to do that with a
clear picture of your particular criteria. I’m sure we will all be
happy if you find a machine that is just right for you and one that
you enjoy using. I don’t think apologies are necessary Bill, after
all, as in all things we each have very different opinions on the
“perfect” machine and it is for you to decide which is right for you.
The benefit of this group is a wide range of interests and experiences
and the confidence to share them.

Best regards

Keith
Mark Rand - 07 Sep 2008 23:40 GMT
>Best regards
>
>Keith

Just a little niggle Keith...
Can you tell google groups not to keep trying to post in html?

= 92 is not the same as ' to anything other than a browser.

Bah Humbug. It's coming around to that time of year again :-(

Mark Rand
RTFM
ravensworth2674 - 08 Sep 2008 07:46 GMT
.As the original questioner possesses the inability to say 'Thank
you', may I?

Nice to read about others giving a helping hand

Norm
jontom_1uk@hotmail.com - 08 Sep 2008 09:47 GMT
On 8 Sep, 07:46, ravensworth2674 <nor...@n-atkinson.wanadoo.co.uk>
wrote:
> .As the original questioner possesses the inability to say 'Thank
> you', may I?
>
> Nice to read about others giving a helping hand
>
> Norm

Norm

I have got into the habit of posting via Google, I know I shouldn't
but it is easy. That alone should have warned me off, what in life is
worthwhile if it is easy? Anyway, I hadn't seen your Martin Cleeve
response at all until I checked via a Newsreader to see what Mark was
grumping about. I read the article you refer to when it first came out
in ME and was inspired to see just what could be done with a fairly
basic machine if one applied first class engineering principles and a
lot of practical experience. My opinion hasn't changed and many times
over the years when I've struggled to do something the picture of his
finished machine (if it ever was finished) always comes into my mind
and off I go again to complete the task. It is just that type of
"making good" that inspires me about Marks rebuild.

I understand your point and of course "win" is a relative term anyway.
I suppose it depends on the rationale for buying the thing in the
first place, as a source of entertainment, as a source of learning, as
a productive machine, as a palliative to some long held urge, as an
investment?? For some of these levels the exercise makes perfect sense
particularly at the level of investment involved, for others, as you
point out, it doesn't. On the other hand, had someone taken your
course of action with the then equivalent of the £6,500 two years ago
they might well be looking at a different result today as well.

I still believe that the strength of this group is the diverse range
of knowledge, wide experience, differing practical capability coupled
with the vital confidence to share these with others, whatever their
viewpoint might be. Long may it continue as in many ways I learn from
it every day.

Regards

Keith
jontom_1uk@hotmail.com - 08 Sep 2008 09:05 GMT
> >Best regards
>
[quoted text clipped - 9 lines]
> Mark Rand
> RTFM

Mark, sorry but have no idea what = 92 is so can't stop using it. I
thought it might be my over prolific use of inverted comma's but they
show up correctly when I checked my post through the BT Newsreader. On
the other hand when I took the trouble to read the posts through the
newsreader I see a totally different thread to that show on Google??
Some of my own posts via Google aren't there and others Google seems
to have ignored altogether ?? Obviously, I don't know enough about
this usenet thing to work it properly - bit like my lathe really.

Regards

Keith
Richard Shute - 12 Sep 2008 23:08 GMT
Bill,
You seem to be leaning in the general direction of Boxfords so you
might also like to consider the machine from which they were copied
the 9" Southbend and also another SB clone the Smart & Brown (SAB or
Sabel). There's also the Smart & Brown Model M with no one has
mentioned, slightly larger than the Boxford and a good deal heavier.

In your position, I'd be tempted to see what crops up on fleabay etc
and then check out the machine spec. and comments on Lathes.co.uk.
There are plenty of other machines of that general spec. which may be
nice if they crop up - Cromwell, Viceroy and Raglan are all of the
period and may be better or worse than each other depending on your
taste and the particular examples wear and complement of accessories.

Richard
jontom_1uk@hotmail.com - 05 Sep 2008 11:39 GMT
> I have a very old ML7 no gear box, no cross feed, no coolant. I am thinking
> of changing it but with what ? About same size but with gear box and cross
> feed, also would like to take bigger cuts. Any suggestions welcome

Bill, a few clues as to what is important to you might help the
suggestions i.e. budget, room available, equipment you need with it
any particular function it must do etc.

If room is limited and you just want a little more machine then I
agree with Mark's Boxford AUD suggestion, much heavier build than the
ML7, gearbox and power feeds to saddle and cross slide. My long bed
version takes up about 53" x 23" on the stand with the standard
version being about 8" shorter. The AUD (4.5") would also be a strong
suggestion if budget is a factor as they are about the best value for
money available for smaller but still very capable machines. Beware
though there are some rough ones about as well as some that will not
have had much use at all. If budget is less of an issue then the
Myford S7 with PCF is a very nice machine and I have not felt
particularly limited in the rate that mine will remove metal. If size
is not a problem and if you are happy with an older machine then the
other suggestions from Mark and Austin all come into play. I
personally would be a little careful with a Chipmaster as although it
is a fine lathe the variable drive system can be extremely noisy when
worn so budget for a VFD to overcome that. I also would not argue with
Stephen's Maximat V10 which is a nice lathe if you can find a good
one. A difficult lathe to buy second hand though as either, if you are
very lucky, people don't realize how good they can be and they are
dirt cheap or they DO know and they want a fortune for them. I guess I
would also have to say that if poorly equipped they can be expensive
and while a lot of the smaller Emco range appears a bit lightweight
the V10 is where they start to get serious but still much lighter
built than the Colchester etc. Excellent build quality for the
original ones though. If you like "bright and shiny" and can put up
with Chinese then something like the Warco BH600 is still excellent
value at the moment.

Regards

Keith
 
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