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Thread: Colchester question
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16th February 2013, 08:24 AM #1SENIOR MEMBER
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Colchester question
On the Colchester Bantam, the cross slide screw for the taper turning attachment has a raised section with it's OD turned concave. Would anyone know what this is for.I can't see any reason for it.
Phil
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16th February 2013 08:24 AM # ADSGoogle Adsense Advertisement
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16th February 2013, 09:39 AM #2Dave J Guest
Not sure as I have never worked on one, but it almost looks like part of a bearing.
Dave
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16th February 2013, 10:27 AM #3SENIOR MEMBER
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G'day Phil.
Would that feature line up with the end of the bearing housing? Either just flush with the end or marginally outside of it.
One thought, it might be an attempt at a Labyrinth seal. Coolant wont run along the shaft, because it has to go up hill to get past that undercut, causing it to drip off the shaft at that point. If it is what I think it is, that diameter will be a close clearance fit with the housing bore.
There wouldn't happen to be a groove like an o-ring groove in the housing at that point, with possibly a drain hole ported at the bottom?
The other Phil.
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16th February 2013, 12:12 PM #4SENIOR MEMBER
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16th February 2013, 12:16 PM #5SENIOR MEMBER
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Colchester question
Hi Phil (the other)
You might be into something there. I have been asked to draw the taper turning attachment off the bantam for a forum member and as I don't draw the boss is doing it. He asked what this part is for and I had no idea. I will investigate your thoughts further.
Phil (with the really bad moustache)
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16th February 2013, 10:25 PM #6Senior Member
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Phil, I have the Bantam Spare Parts manual which has an exploded view of the Taper Attachment and from this limited information I would say that the feature on the shaft does nothing although it may have been used in the manufacturing process.
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17th February 2013, 05:44 AM #7SENIOR MEMBER
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17th February 2013, 09:18 PM #8Senior Member
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Cross slide screw
Hello Phil,
I replaced the very worn cross slide screw on my Chipmaster (same saddle assembly as the Bantam) some time ago with a modified screw from a Nuttal. I kept the old screw and it has the same feature you were asking about. Sorry but I don't remember what the feature was there for, if anything. However I only partially solved my free play problem, the cylindrical part the screw reacts against is also worn in its housing and this is also an issue worth looking at if you or someone else is going to make the parts for a TTA.
This won't help you but on a related theme, I was in Mick Moyles recently and saw some new Sheraton cross slide screws for about $30 each, this might be of interest to owners of these lathes. Anyone interested should phone him first to check, they were about 3/4 the way from the front of the building and about in the middle cross ways. If anyone has been to Mick's finding a specific thing amongst all the other interesting distractions is difficult.
Mm. (another Phil)
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17th February 2013, 10:36 PM #9SENIOR MEMBER
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