Thread: Tos sn40 cross slide disassembly

Hi , anyone have experience taking off tos sn40 cross slide ?
it's seems at some stage the lead screw nut should come off, but it's not clear to me how to do it.

Is there a telescopic taper attachment on your machine?

No taper attachment

It may be the case that you'd have to remove the capscrews, usually found in the top of the cross slide, and passing through, into the bronze nut. Once you remove those bolts, then you should be able to push the cross slide off the far end of the dovetail, depending on how your lathe is built. Pictures might help raise better advice.

HuFlungDung, is on the right path.

I have an SN32, if you look on the back side (away from the operator), there should be a cap with some screws. Take those out and there should be a roller bearing inside.

Then look on top of the carriage, (or bottom, I'll check on the weekend when I'm at the shop). There should be some screws which pass through the carriage to a bronze nut (a threaded block really). If you can take those screws out then the slide should be free from the screw.

Does that make sense?

Take some pictures of the cross slide, and I'll compare to the one I have.

Well i will take some pictures tomorrow, it's does have two screws on the top and another oil port screw combo or something in the middle of the screws , removing the screws didn't seems to unclamp the nut and i didnt figure how to remove the middle screw

Some pictures of the cross slide, in the back behind the flange there are the bearings that hold the lead screw.

Is there an access hole underneath the cross slide? You might be able to get a look underneath using a small mirror to see if there are any more screws beneath.

Why are you removing the cross slide? Is there a problem? Another thing you might see underneath is an offset clamp screw that clamps across a slit in the nut. This would be the typical 'cheap way' to provide a backlash reduction adjustment.

Well , my work place just bought this new old lathe, the cross slide was full of junk in the center cavity i wanted to remove the cross slide all together for cleaning.

Any way eventually i managed to clean it without taking the cross slide off, but for the sake of future problems it will be nice to know how to remove the slide.

my assumption looking at the drawing in the manual TOS SN40 SN50

that after the screw is released from the bearing in the back and pulled out of the feed mechanism (wich it does, i have got to this stage) there will be enough space to push down the nut, the only uncertainty is how to remove the middle port / screw.