bodger
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| posted on 5/12/12 at 04:08 PM |
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Lathe - broken gear tooth
I've got the chance of a Colchester Bantam lathe for £500. It's an ex school one so hasn't seen a lot of use. Only trouble is
it's got a tooth out of one of the gears at the back of the headstock, though it does seem to mesh ok. I think it's used to drive the
longitudinal feed screw. How easy/costly would it be to get a new gear or should I walk away?
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renetom
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| posted on 5/12/12 at 04:53 PM |
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lathe
Hi
Seems a lot of money for a broken lathe
I would shop around
Eg:
colchester lathe 
Good luck
René
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Talon Motorsport
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| posted on 5/12/12 at 04:59 PM |
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I did the same thing I brought a Colchester student with broken screw drive it was missing 3 teeth for £275. Weld the hole up and file the tooth back
in with needle files.
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bodger
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| posted on 5/12/12 at 05:26 PM |
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Thanks, I've been watching ebay for a year or so now & decent lathes around my area don't come up very often & the ones that do
seem to go for silly money compared to what some people on here have paid. At least in the south, they . That ones in Chester which is a fair old
distance = money to get it to me here down souf. This one's local & costing nothing for the transport. Apart from the gear it's not in
too bad a condition. I might try the machine tools guy in Burgess Hill on Friday & see what he thinks. I suppose if I'm honest, I've
always fancied one but apart from a few bushes I can't think how much use it'll get so I'm wavering a bit. Though people do say that
when you've got one you find lots of little jobs you can do.
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trikerneil
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| posted on 5/12/12 at 05:36 PM |
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I had this problem years ago.
Drill holes and insert steel pins where the tooth was. Fill the rest of the gap with braze and file back to a tooth shape.
HTH
Neil
ACE Cafe - Just say No.
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chris-g
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| posted on 5/12/12 at 05:37 PM |
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Keep an eye out or post a wanted ad on http://www.homeworkshop.org.uk its free.
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HowardB
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| posted on 5/12/12 at 05:59 PM |
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once you own a lathe, the only thing that you ever really wish is that you'd bought a bigger one!!
Howard
Fisher Fury was 2000 Zetec - now a 1600 (it Lives again  and goes zoom)
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vanepico
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| posted on 5/12/12 at 06:12 PM |
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I bet it's because they've used the feed screw and let it hit the chuck or something, sounds like something a student might do accidently.
I was always worried about doing that on the college machines.
__________________________
Will CAD for food/money/beer...
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Dualist
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| posted on 5/12/12 at 06:38 PM |
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See if you can get the serial number off it (end of the bed) and phone Colchester for a list of prices for gears on that shaft. They aren't as
expensive as you may think 
Rotary build coming soon...
quote:
Originally posted by RichardK
I recently discovered that pigs can p i s s sideways when being transported 
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bodger
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| posted on 5/12/12 at 07:26 PM |
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quote:
Originally posted by vanepico
I bet it's because they've used the feed screw and let it hit the chuck or something, sounds like something a student might do accidently.
I was always worried about doing that on the college machines.
There's a chunk missing out of the side of the 4 jaw so I think that's exactly what happened.
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liam.mccaffrey
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| posted on 5/12/12 at 07:49 PM |
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2nd hand bantam parts are readily available. If not, if its a standard DP gear with a 14 or 20 deg pressure angle it will probably be available off
the shelf from HPC Gears there is also Tony Griffiths at http://lathes.co.uk/, he
stocks some stuff. Plus there are a load of parts clearing places that carry this stuff.
When I repaired/rebuilt/remanufactured the gearbox on my pre ww2 lathe this guy linky cut me some special
gears for not very much at all.
I think I had the blanks machined and i sent them to him. Even if you had to have the part remade I wouldn't expect it to cost more than about
£30-£40.
I can help if needed, I've done exactly as you have. Feel free to U2U
[Edited on 5/12/12 by liam.mccaffrey]
Build Blog
Build Photo Album
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Confused but excited.
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| posted on 5/12/12 at 08:05 PM |
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quote:
Originally posted by Dualist
See if you can get the serial number off it (end of the bed) and phone Colchester for a list of prices for gears on that shaft. They aren't as
expensive as you may think
Ya think?
I got offered a Colchester Student for £100, some years ago because the tailstock was missing. Though I had struck gold until they quoted me £675 for
the bare machined casting, no sleeve etc.
Tell them about the bent treacle edges!
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bodger
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| posted on 5/12/12 at 09:13 PM |
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quote:
Originally posted by liam.mccaffrey
2nd hand bantam parts are readily available. If not, if its a standard DP gear with a 14 or 20 deg pressure angle it will probably be available off
the shelf from HPC Gears there is also Tony Griffiths at http://lathes.co.uk/, he
stocks some stuff. Plus there are a load of parts clearing places that carry this stuff.
When I repaired/rebuilt/remanufactured the gearbox on my pre ww2 lathe this guy linky cut me some special
gears for not very much at all.
I think I had the blanks machined and i sent them to him. Even if you had to have the part remade I wouldn't expect it to cost more than about
£30-£40.
I can help if needed, I've done exactly as you have. Feel free to U2U
[Edited on 5/12/12 by liam.mccaffrey]
Thanks for the offer. I think I'm going to take a punt on the lathe so I might be in touch.
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alfiebeard
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 posted on 5/12/12 at 10:18 PM |
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I have a Colchester Bantam and its a brilliant little Lathe, as others have said the only thing you will want when you own a Lathe is a bigger one,
the Bantam will swing a 10" disc but every time I need to skim a disc it turns out to be an 11" one.
Alfie
Old bloke on a mission with 320BHP of help
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