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Model Forum / General / Models / April 2009Stevenson's 5C spin indexer
I'm thinking of getting something to allow me to cut squares an hexagons on the ends of rods using my (small) mill. The spin indexer about 2/3 of the way down the page at this URL look useful - http://www.arceurotrade.co.uk/Catalogue/Collets/5C-Fixtures Does anybody know what size the base is? Is it the 128 x 134m dimension? My milling table is none too wide and I couldn't hold a 128m wide base by the sides. Brenda -- anotheri > I'm thinking of getting something to allow me to cut squares and > hexagons on the ends of rods using my (small) mill. [quoted text clipped - 11 lines] > > I've got one from J&L that looks the same but without the ER adapter and the base is about 4.25" wide (perpendicular to the axis) and 4" long. Slightly narrower now that I've milled the sides parallel to the spin axis to allow it to be quickly aligned with the T slots, it came unmachined on those faces, but it was much cheaper than the Suburban tool offering. David Billington Wrote: > > Does anybody know what size the base is? Is it the 128 x 134mm > > dimension? My milling table is none too wide and I couldn't hold [quoted text clipped - 7 lines] > axis to allow it to be quickly aligned with the T slots, it came > unmachined on those faces, ... I had assumed the sides would have been cut parallel with the spin axi already! How did you get it aligned with the axis for milling? Just turn i upside down? My vice will hold up to 3" wide, so it would be good if I could cut th base down to that to allow it to be held in the vice, which would mak for quick and easy deployment! Brenda -- anotheri > David Billington Wrote: > [quoted text clipped - 19 lines] > already! > Not in the case of the one I bought but it was like £35. > How did you get it aligned with the axis for milling? Just turn it > upside down? > It has been a few years but IIRC it was clamped to an angle plate through the bore and the base clocked level side to side (the base was ground), the angle plate being set square to the mill, and the sides machined. Just having looked again the index plate face end shows the machining marks spiral outwards indicating it has been faced and I assumed the bore done at the same or the face used as a reference, subsequent checking of the accuracy shows the machined sides to be square to closer than anything I need to do. Interestingly the collet closer end appears to have been machined on a shaper as the tool marks are parallel. > My vice will hold up to 3" wide, so it would be good if I could cut the > base down to that to allow it to be held in the vice, which would make > for quick and easy deployment! > Looks like you could machine it down to 3" wide. I always fit it straight to the mill table and align it to a T slot but the table is 9" wide. > Brendan > I'm thinking of getting something to allow me to cut squares and > hexagons on the ends of rods using my (small) mill. > > The spin indexer about 2/3 of the way down the page at this URL looks > useful - > [quoted text clipped - 5 lines] > > Brendan http://www.rcgroups.com/forums/member.php?u=80362 > View this thread: http://www.rcgroups.com/forums/showthread.php?t=1035058 No doubt John S will be along any moment to confirm....... AWEM Andrew Mawson Wrote: > No doubt John S will be along any moment to confirm....... > > AWEM Is John S the Stevenson of "Stevenson's 5C spin indexer" or is that just coincidence? I like the idea of being able to use ER32 collets ... Brendan  Signatureanotherid >Is John S the Stevenson of "Stevenson's 5C spin indexer" or is that >just coincidence? It is not a coincidence - the same Stevenson. Regards, Tony >>Is John S the Stevenson of "Stevenson's 5C spin indexer" or is that >>just coincidence? > >It is not a coincidence - the same Stevenson. Then why didn't he ensure it was designed and manufactured with the sides machined parallel to the spin axis? gd&r :) -- >>>Is John S the Stevenson of "Stevenson's 5C spin indexer" or is that >>>just coincidence? [quoted text clipped - 5 lines] > >gd&r :) The only use for that would be when cutting splines or key seats. For all other uses, the fact that the base is parallel to the axis is sufficient. Mark Rand RTFM > >> [quoted text clipped - 20 lines] > RTFM > I was taught that tools of this sort, dividing heads etc, normally have a reference face parallel to the axis to allow quick alignment against a block in the T slots. Certainly works for me for what I normally do where you want the axis set parallel to the table axis. On the odd occasion I have milled tapers having placed a taper block between the T slot block and base, it's a useful time saving feature. BTW I didn't know that John Stevenson indexer was not machined on the side, I noted in my original post that I had sourced mine from J&L and their cheapo one wasn't machined on the sides. David Billington Wrote: > I was taught that tools of this sort, dividing heads etc, normall > have > a reference face parallel to the axis to allow quick alignment agains > a > block in the T slots. I assume, then, that the intended method is to use the workpiece as means of clocking the indexer to the table axis? Obviously this can be done, but not nearly as convenient as having machined side to reference off! If the thing comes to pieces then guess yet another project will be to mill the sides square to the axi somehow! And make the base smaller. It might even be nice to make a plate with holes for just four an six-sided cutting - there are an awful lot of holes to go wrong with o the supplied plate! Not entirely sure how I could do this mind you .. ;) Brenda -- anotheri > David Billington Wrote: > [quoted text clipped - 8 lines] > means of clocking the indexer to the table axis? > One way to do it but the item I thinks it's a knock off of here, http://www.subtool.com/st/SM5C.shtml , has the base sides ground parallel for a purpose. > Obviously this can be done, but not nearly as convenient as having a > machined side to reference off! If the thing comes to pieces then I > guess yet another project will be to mill the sides square to the axis > somehow! And make the base smaller. > > It does come to pieces quite easily, at least the one from J&L. > It might even be nice to make a plate with holes for just four and > six-sided cutting - there are an awful lot of holes to go wrong with on > the supplied plate! Not entirely sure how I could do this mind you ... > ;) > > Can't see there would be much point in going to the trouble, although the disc on mine is held in place by a threaded ring so would be easy to change. The plate is numbered 0 - 35 (36 holes) and the vernier pin holes 0 - 9, and there is a pointer mark between 4 and 5. If you leave the pin in hole 0 and have the pointer on 0 on the disc at the start then 4 sides would be disc holes 0, 9, 18, 27. 6 holes would be disc holes 0, 6, 12, 18, 24, 30. > Brendan David Billington Wrote: > If you leave > the pin in hole 0 and have the pointer on 0 on the disc at the start > then 4 sides would be disc holes 0, 9, 18, 27. 6 holes would be disc > holes 0, 6, 12, 18, 24, 30. Yes, you're right, I really shouldn't start trying to "mend" it unti I've got one and can see if it's "broken" or not! Brenda -- anotheri >>Then why didn't he ensure it was designed and manufactured with the >>sides machined parallel to the spin axis? >> >>gd&r :) > >The only use for that would be when cutting splines or key seats. Surely if you were cutting say a hex on a round bar the transition radius from the hex to the round wouldn't be perpendicular to the axis? Getting a nice consistent radius in this area might not matter in all apps but it still looks messy if things are not squared up. -- >Then why didn't he ensure it was designed and manufactured with the >sides machined parallel to the spin axis? It was John's idea, but that doesn't mean he has any control over the manufacturing process. Regards, Tony > >>Is John S the Stevenson of "Stevenson's 5C spin indexer" or is that > >>just coincidence? [quoted text clipped - 7 lines] > > -- A good question to which I don't have an answer. John S. >> >>Is John S the Stevenson of "Stevenson's 5C spin indexer" or is that >> >>just coincidence? [quoted text clipped - 9 lines] > >A good question to which I don't have an answer. Bugger! I was expecting a really witty reply (or a profanity) If arc euro are at Harrogate this year I'll probably buy one though, looks a useful bit of kit. -- > On Fri, 17 Apr 2009 00:50:10 -0700 (PDT), John S > [quoted text clipped - 15 lines] > > Bugger! I was expecting a really witty reply (or a profanity) Sorry to disappoint you, now piss off. John S. anotherid Wrote: > I'm thinking of getting something to allow me to cut squares an > hexagons on the ends of rods using my (small) mill. [quoted text clipped - 6 lines] > Does anybody know what size the base is? Is it the 128 x 134m > dimension? Well, I can now answer my own question. On the one I got from AET, th base is about 100mm long and 114-116mm in width. Distinctly trapezoida in fact! It'll need a little milling before I can use the sides fo quick alignment. Brenda -- anotheri > Well, I can now answer my own question. On the one I got from AET, the > base is about 100mm long and 114-116mm in width. Distinctly trapezoidal > in fact! It'll need a little milling before I can use the sides for > quick alignment. If it's to hand Brendan, can you tell me whether it will pass 19mm bar completely through the head when in ER32 mode ? Thanks, SignatureBoo Boo Wrote: > If it's to hand Brendan, can you tell me whether it will pass 19mm bar > completely through the head when in ER32 mode ? [quoted text clipped - 3 lines] > -- > Boo I'll check tonight. Brendan Signatureanotherid Boo Wrote: > If it's to hand Brendan, can you tell me whether it will pass 19mm bar > completely through the head when in ER32 mode ? > > Boo 20mm goes through easily, seemingly with room to spare! Brenda -- anotheri > 20mm goes through easily, seemingly with room to spare! Great, thanks for that. SignatureBoo |
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