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Member postings for MoosE

Here is a list of all the postings MoosE has made in our forums. Click on a thread name to jump to the thread.

Thread: Warco WM250 headstock lubrication
11/04/2012 00:12:12

Hi Gunnar,

I had exactly the same difficulty. The drive-side bearing inner race was so tight on the shaft it was impossible to "feel" for it tightening and consequent risk of further damaging the bearings. I carefully eased the shaft down with a strip of fine abrasive cloth, cleaned and oiled the shaft and re-assembled. Much better!

Did your bearing race and rollers look like those in the picture above?

I couldn't figure out how to remove the outer races without damaging the headstock casting so had to put the original bearings back. Used molybdenum disulphide grease (Castrol MS3) and the machine has since done a considerable amount of good work.

Cheers,

MoosE

09/11/2011 20:57:15
Hi Keith,
Thanks for the detailed explanation.
 
MoosE
07/11/2011 23:37:03
The WM250 manual leads one to bbelieve that the headstock is lubricated from the gearbox below. Not the case! I agree with Pailo there is no easy way to lubricate the bearings apart from dismantling. Leading on from this: My machine is about 18 months old and recently after working it for about 1/2 hour at full speed, the spindle rapidly decelerated accompanied by an awful noise as the motor struggled. Switched off quick! The whole headstock was very hot and the spindle extremely stiff to turn.
On dismantling, the split spindle adjusting nut was unbelievably tight and its two lock screws had not been tightened sufficiently to properly lock it. There was very little grease on and around the bearings. So, failure caused by excessive pre-load and insufficient lubrication?
The chuck-side bearing has a wear mark on the outer race (dark ring in photo 1) and a corresponding mark on all the rollers suggesting point contact and an error in the bearing tapers. Anyone else seen this sort of thing before?
 
Cheers,
MoosE.


Edited By MoosE on 07/11/2011 23:40:58

Edited By MoosE on 07/11/2011 23:44:56

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