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Colchester lead screw problem
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Topic: Colchester lead screw problem (Read 10160 times)
buffalow bill
Jr. Member
Posts: 86
Country:
Colchester lead screw problem
«
on:
March 09, 2012, 10:05:01 AM »
This lathe belongs to a friend of a friend but hoping to help.
The lathe is a Colchester Master 2500
Problem!
Lead screw not turning when engaged, but the collar at the gearbox output shaft is rotating.
From the pics it looks like a special drive arrangement/collar, ie not through a shear pin.
Q1 am I correct in the assumption that it isn’t a shear pin.
Q2 is the drive through a difficult to make component. (I’ve only seen the pics)
Q3 are spares available for this machine.
Q4 was that water in your dram?
Thanks Guys
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Helensburgh, Argyll & Bute
SemiSkilled
Jr. Member
Posts: 61
Country:
Re: Colchester lead screw problem
«
Reply #1 on:
March 09, 2012, 01:42:42 PM »
Snap, I had the same on mine,
just check all the levers are in the right place, especially the one furthest left, there is a shear pin but mine was OK, just me being thick
Lee
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You're right, it does look easy when its finished.
buffalow bill
Jr. Member
Posts: 86
Country:
Re: Colchester lead screw problem
«
Reply #2 on:
March 10, 2012, 07:01:24 AM »
Thanks Lee
Will pass the info on along with a note for some falling down juice!!
Bill
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Helensburgh, Argyll & Bute
j_e_f_f_williams
Jr. Member
Posts: 15
Re: Colchester lead screw problem
«
Reply #3 on:
March 10, 2012, 12:04:27 PM »
Hello,
I have an older Colchester Master Mk1 and contacted Clausing via e-mail and got manuals etc directly from them. One of my parts needed repair and they were even nice enough to scan original parts drawings so I could relocate holes for over boring to add a larger bushing. Might want to contact them to see if they can help with how it's arranged?
My shaft is driven by 2 balls pushed out into matching cups in the collar. The balls have a screw mechanism to tighten them for the pressure to make this clutch mechanism work. Not sure if it's the same on a 2500. Can also send you a scan of how it is on the Mk1 if you want.
TTYL, Jeff
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Jonny
Hero Member
Posts: 780
Re: Colchester lead screw problem
«
Reply #4 on:
March 10, 2012, 03:48:20 PM »
Newer Harrisons are the same (600 Group), just rotate the chuck whilst trying to engage a change of pitch. Or if it looks like its gone in, just rotate the chuck, check lead screw rotates.
Ive adjusted the indent line up 1-8 but equally could be the metric or imperial selector.
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buffalow bill
Jr. Member
Posts: 86
Country:
Re: Colchester lead screw problem
«
Reply #5 on:
March 30, 2012, 12:20:03 PM »
Thanks For the replies guys. The info has been passed on and a result found.
Jeff thanks for the offer but the problem has gone away!!!
Thanks again guys
Bill
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Helensburgh, Argyll & Bute
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