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Myford super 7 Tailstock Spindle Damage

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Carl29/07/2019 17:47:56
19 forum posts

Hello all,

The MT2 spindle bore in my tailstock has some damage i can feel, has anyone any idea of how to best clean it up ?

Has anyone any experience of using a MT reamer or any other way that proved successful ?

Thanks

Martin Connelly29/07/2019 17:59:09
avatar
847 forum posts
99 photos

I have cleaned one up (not on a Myford) with a reamer. Held it in the 4 jaw to get best possible concentricity of the shank and checked the tip was running true using the centre drilled hole. kept everything locked or pinched to minimise snatching and turned the chuck by hand to take off the minimum necessary to give a good surface. I was only removing raised high spots and leaving the main bulk of the spindle untouched.

Martin C

Brian Wood29/07/2019 19:06:46
1942 forum posts
37 photos

Hello Carl,

I too have cleaned up the morse tapers on tailstock barrels, but I adopted a much gentler way of going about it

I gripped the tang end of the correct size reamer in the bench vice in one instance and pushed the barrel onto it while rotating it by hand. You can 'feel' the cutting that way. I haven't measured the result as the lathe is being refurbished but taper shank drills fit with a nice 'kerthunk' noise and grip properly

In the second case, a 3 MT version, the tailstock barrel [18 inches long and heavy] was gripped via a cloth in the vice and the reamer turned by hand in a big tap holder, using the tang gripped between the jaws of the tap holder. Later measurement on a precision bar at 5 inches from the mouth of the barrel gave a run out of under 0.001 inches and again there was the satisfying 'kerthunk' noise on fitting drills

Regards

Brian

Carl31/07/2019 14:06:49
19 forum posts

Thank you for the replies, sounds like good advice on controlled use of the MT reamer. I think i will give it a go.

Carl

KWIL31/07/2019 15:41:17
3111 forum posts
56 photos

It may well be that you have an "piece" of swarf imbeded, just a light touch with the reamer.

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