Steamwhisperer 16th February 2013, 08:24 AM 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
Dave J 16th February 2013, 09:39 AM Not sure as I have never worked on one, but it almost looks like part of a bearing.
Dave
Machtool 16th February 2013, 10:27 AM 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.
Steamwhisperer 16th February 2013, 12:12 PM Not sure as I have never worked on one, but it almost looks like part of a bearing.
Dave
Hi Dave,
I thought the same but it certainly isn't anything like hard but then there isn't much load on it,,,I think??
Phil
Steamwhisperer 16th February 2013, 12:16 PM 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.
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)
Techo1 16th February 2013, 10:25 PM 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.
Steamwhisperer 17th February 2013, 05:44 AM 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.
Thanks Techo,
We have a photocopy of the operators manual at work and I bet you can't guess which page is only partially there.
Phil
Metalman 17th February 2013, 09:18 PM 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)
Steamwhisperer 17th February 2013, 10:36 PM 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)
HI Phil,
I'm beginning to think it's a common name :)
It might be worth an ask at Mick Moyles as the original screw didn't come with the lathe. You get a modified screw for the TTA and while it is off getting drawn the lathe is useless.
Thanks for the info.
Phil
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