Probably got a split nut that has two small screws to spread the split, not easy to get to but doe soffer some adjustment .0.1mm is not a lot to bother about.

Edited By JasonB on 03/06/2020 13:21:20

I believe access to the split nut adjuster screws on the WM240 lathe is via the rear under side of the cross slide.

If there is a screw adjustment see if the parts list tells you what thread it is. then calculate the amount of turn that will compensate for taking up a mere 4 thou. Then give up. It is only a problem when you have half a turn backlash – think about it

Hi All, and I hope a Happy New Year becomes a reality for all of us.

I've just taken out most of the backlash on my 290V cross slide, the brass nut has two tiny hex grub screws on its rear end for a 1mm hex key to allow the 1mm or so slot cut across the nut to be closed around the screw threads, and is easy to get to on this model. That was the easy part.

However, can any of you much more knowledgable gentlemen please enlighten me on how the cross slide gib is supposed to be retained and adjusted? There are no gib screws along the side of the slide (unless they used them for the DRO scale mounts!), only this flat headed screw in the front which I thought would have locked the gib in place on tightening. Today, however, after stripping it to clean and re-lube the ways, I find that no matter how much I tighten the screw, when I wind the slide back towards me (front of the lathe) the gib gets pulled in and locks the whole thing up! Any help greatly appreciated, as always.

Looks suspiciously as if that's exactly what they've done – the gib adjusters are behind the DRO, which has to be removed to adjust them. Can you get a better look behind the DRO? Allan head screws with lock-nuts?

May not matter provided the scale is fairly easy to remove – once set up gibs don't need frequent adjustment. Can't remember when I last tweaked mine.

Dave

That tapered gib doesn't seem to have the cutout for a single screw to adjust it, so there is probably another screw at the other end. It takes careful and delicate adjustment to remove the backlash and not have the lot get too tight. The front screw tightens and when things get tight, then back it off about 10 degrees and tighten the rear one. You will then be close and very small ammounts of adjustment will finish the job.

The cross slide backlash with the leadscrew is nothing to do with the gib adjustment, this thread is getting confused.

You may be getting mixed responses by continuing a thread which started on a different subject?

Follow old mart’s post at 21:44 and start your own threads in future, for your particular enquiry, is my advice.

Some gib strips of this type have a slot into which the Adjusting screw fits. In this way the gib is pushed in as the screw is tightened, or withdrawn as the screw is slackened. They can change their setting with vibration from milling or turning.

Howard

If you don't have a manual for the WM240, then there are lots of results to be found by googling Warco WM 240.