Gallery, Projects and General > The Design Shop

Headstock Spindle Back Stop

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andyf:
My lathe has only a single nut there, Peter. It is locked in place by an M4 grubscrew (I added a bit of brass under that, to protect the threads on the spindle). 

Could you do something similar and use only one nut to expose the original 3.7mm plus another 7.5mm of the M27 thread?

Andy

Stilldrillin:
Very good thinking Andy!
I was going to suggest mounting on the o/d of the nuts. I also have a couple of spares, if needed......

David D

Jonny:
Looks to be the quickest and simplest way as David said, it wouldnt need to be cock on accurate any way.

Other than that remove the lock nut and thread up the bore when screwing back stop on to act as a locknut.

Either way you wont loose any spindle bore.

PeterE:
Hi ,

Andy, Thanks for that idea  :thumbup: That sounds like a good way forward. getting between 10 and 11 mm at the end of the spindle makes a huge difference in stability! Is the nut hardened or toughened or neither?

David D, Mounting on the outside of the lock nuts is of course a possibility, but I want to be careful with the sizes as I have made a simple dividing contraption that I though I could get into play here as well. That is why there is a sketched 60t gear in the line drawing above.

... and to Jonny who wrote while I wrote ...

Agree with you that David´s idea is the simpler, but I think Andy´s is (at the moment) coming closer to what I am thinking. And you are right I will not loose any spindle bore, just have to be careful to make the setting rod in a way that it will not slant when reaching the MT3 taper.

Thanks for all input  :thumbup:

Have to think on for a couple of days and finish the tiling of the guest "bathroom" so it will be ready before X-mas.

BR

/Peter

andyf:
Hi Peter,

My nut isn't hardened in any way, but yours might be. I doubt it, if your lathe is Chinese like mine. You can soon find out; try scratching it with an HSS tool.

The grubsrew on mine is original, but I think I prefer it to lock nuts. The lathe came with taper roller bearings, and adjusting the preload with no instructions is already difficult enough, without having to make sure the inner nut doesn't shift as the locking nut is tightened on to it.

Andy

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