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Model Forum / General / Models / July 2009Sturmey Archer gear info
Bit of a shot in the dark but....... I'm looking for some small pinions for a one off project and it occurs to me that the planet gears from a S-A hub gearbox might just be around the right size. I has got to be 40 years since I took one of these apart so my memory is a little faded but I think there are 4 pinions around 3/4" diameter Can anyone who might just have some of they in their junk box please tell me the general dimensions? Bore, face width, no of teeth and overall diameter are what I need to assess suitability. TIA Bob If you've a defunct electric screwdriver, the gearbox in them is also epicyclic with sun-and-planet gears. > I'm looking for some small pinions for a one off project and it occurs to > me that the planet gears from a S-A hub gearbox might just be around the [quoted text clipped - 5 lines] > Bore, face width, no of teeth and overall diameter are what I need to > assess suitability. > If you've a defunct electric screwdriver, the gearbox in them > is also epicyclic with sun-and-planet gears. [quoted text clipped - 8 lines] >> Bore, face width, no of teeth and overall diameter are what I need to >> assess suitability. All my drills and drivers are still working but I suspect the gears might be quite a bit smaller than 5/8 - 3/4" diameter given the body diameter of typical drivers. If I come across a dead one I'll have look and see. Bob >All my drills and drivers are still working but I suspect the gears >might be quite a bit smaller than 5/8 - 3/4" diameter given the body >diameter of typical drivers. If I come across a dead one I'll have look >and see. > >Bob Bob: There's one in bits on the bench at work, one of my sons is playing around with some old bike bits he is clearing out. I'll have a look in the morning, at the same time as I am looking for Tim's Makrolon! Peter -- Peter & Rita Forbes Email: diesel@easynet.co.uk http://www.oldengine.org/members/diesel http://www.stationary-engine.co.uk http://www.oldengine.co.uk >> All my drills and drivers are still working but I suspect the gears >> might be quite a bit smaller than 5/8 - 3/4" diameter given the body [quoted text clipped - 18 lines] > http://www.stationary-engine.co.uk > http://www.oldengine.co.uk Thanks Peter. Much obliged Bob > If you've a defunct electric screwdriver, the gearbox in them > is also epicyclic with sun-and-planet gears. [quoted text clipped - 10 lines] > > - Show quoted text - If all else fails I will hob them for you Peter > Path: edtnps83!newsfeed2.telusplanet.net!newsfeed.telus.net!feeder.erje.net!newsfeed.xs4all.nl!newsfeed6.news.xs4all.nl!xs4all!news2.euro.net!feeder.news-service.com!cyclone03.ams2.highwinds-media.com!news.highwinds-media.com!npeersf02.ams.highwinds-media.com!newsfe06.ams2.POSTED!7564ea0f!not-for-mail > From: Bob Minchin <nospam@falseaddress.com> [quoted text clipped - 12 lines] > X-Trace: newsfe06.ams2 1247562590 86.16.36.255 (Tue, 14 Jul 2009 09:09:50 UTC) > NNTP-Posting-Date: Tue, 14 Jul 2009 09:09:50 UTC reposted to a group where there will likely be a quick(er) answer... > Organization: virginmedia.com > Date: Tue, 14 Jul 2009 10:09:48 +0100 [quoted text clipped - 16 lines] > > Bob >> Bore, face width, no of teeth and overall diameter are what I need to >> assess suitability. Measured with a ruler, so approximate: O/D 11/16" (over the tips of the teeth) I/D 1/4" width 5/16" 20 teeth  SignatureAndrew > >> Bore, face width, no of teeth and overall diameter are what I need to > >> assess suitability. [quoted text clipped - 7 lines] > -- > Andrew Sounds like 32DP then which matches the hobs I saw at the SA auction. John S. >>> Bore, face width, no of teeth and overall diameter are what I need to >>> assess suitability. [quoted text clipped - 4 lines] > width 5/16" > 20 teeth Andrew, Thanks very much indeed! Bob Quoting Bob Minchin <nospam@falseaddress.com>: >>>>Bore, face width, no of teeth and overall diameter are what I need to >>>>assess suitability. [measurements] >Thanks very much indeed! If that's right, I've got an old hosed S-A 3-speed hub that I took off a rescue bike, which you're welcome to strip down for any bits you can use. SignatureDavid Damerell <damerell@chiark.greenend.org.uk> Kill the tomato! Today is Chedday, Presuary. > Bit of a shot in the dark but....... > [quoted text clipped - 8 lines] > Bore, face width, no of teeth and overall diameter are what I need to > assess suitability. Start here: http://www.users.globalnet.co.uk/~hadland/gear.html BugBear |
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