Member postings for martin humphrey

Thanks for all your comments and help.

I stripped down the spindle. Removed bearings and cones.Cleaned everthing carefully deburred all the cast iron seats re-seated the cones at 90 deg to original and rebuilt the spindle. I then added new oil to the bearings ran them for 20 mimutes and reset them. I now get no movement on my clock at the spindle shoulder and when I turned a 3" dia bar I get a max runout of less than 0.01mm 2.5" from the chuck.Sorry for the use of metric and imperial as all my clocks are metric and i'm imperial.

The test bar has been checked and is now in the bin as it's not only eccentric but bent as well.

Thanks again for all your comments.

Thanks for all your comments and help.

I stripped down the spindle. Removed bearings and cones.Cleaned everthing carefully deburred all the cast iron seats re-seated the cones at 90 deg to original and rebuilt the spindle. I then added new oil to the bearings ran them for 20 mimutes and reset them. I now get no movement on my clock at the spindle shoulder and when I turned a 3" dia bar I get a max runout of less than 0.01mm 2.5" from the chuck.Sorry for the use of metric and imperial as all my clocks are metric and i'm imperial.

The test bar has been checked and is now in the bin as it's not only eccentric but bent as well.

Thanks again for all your comments.

Thanks for all your suggestions. The test bar does describe a cone the further away I test. I have not tested the register yet I will do this asap. I will also test the test bar but if this is out I might not be a happy man as it's fairly new.

Edited By martin humphrey on 12/10/2012 19:39:26

If i put a 2" dia bar in a 3 jaw chuck I get movement on my dial gauge moving the bar around. This hasn't had new bearings yet. What I'am after really is "will new bearings bring my lathe up to spec" or do I go for broke and buy a new chinese lathe. I've been quoted spindle runouts of 0.01mm for some and don't really see this as a step up considering my lathe is 70 years old and is only sligthly worse than this.Also turning between centres on my lathe greatly decreases runout. The bearings are setup correctly and they are oiled every time I start the lathe up. I've had the spindle out and checked the bearings no pitting cages are fine and they are seated up to shoulders. I work with tapered roller bearings often and am aware what to look for. Is a lathe of this vintage ever going to be as good as a new chinese lathe or have I got this back to front.

I've got a morse tapered test bar purchased from rdg tools and test at about 25mm from the end of the spindle nose on the parallel section.

Hi

I'm new to posting so I'll start with a simple one.

I've got a 10" atlas 1943 vintage. It's got full set gears slotted cross slide etc etc. The bed is good and everything works fine except I have about 0.04mm of runout at the spindle. I dont find this a problem as i can mostly work around this but I would like to have something a bit more accurate. First question has anybody got a 10" and what is their runout. 2nd does anybody own a warco 240 lathe and what do they think of it.. The reason for asking is to sortout the bearings for this lathe is about £250.00 and I'm not sure it's worth it.