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Endfloat in Headstock Spindle

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Malcolm Bannister28/04/2015 08:51:19
20 forum posts

Hi All..

Continuing the restoration of my Myford "M" lathe I've come across a problem.

How do I adjust the spindle bearings in the headstock to remove endfloat and do I need any special tools?

Thanks

Malc

Martin Kyte28/04/2015 09:05:44
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3445 forum posts
62 photos

This is what Myford Ltd used to do.

1. Power Down

2. Remove all belt tension.

3. Remove Chuck

4. Rotate RH collar one complete turn. (top towards you).

5. Rotate LH collar one complete turn. (top towards you).

Spindle should be completely free of front bush.

6.Loosen allen screw on collar at end of spindle.

7. Using the Allen key tighten collar as tight at it will go by hand.

Inner tapered roller races are now locked together with correct pre-load.

8. Back off LH collar one complete turn + a bit (top away from you)

9. Rocking the spindle by holding the spindle nose tighten the RH collar by hand (top away from you).

10. When you feel resistance to movement stop.

11. Collar should be just tight enough that spindle can just be moved by hand holding the nose.

12. Do up the LH collar by hand (top towards you).

You should still feel resistance when turning the spindle by the nose.

13. With the crescent wrench on the LH collar tap the end smartly with a 12oz hammer.

The spindle should move forwards by a couple of tenths and be completely free running.

14. With the lathe running slowly (lowest direct speed) put the oil gun in the front oil cup and pump until oil issues from the front bearing. (It comes out of the back and is sprayed around by the bull wheel at least it did on mine)

15. All should be sweetness and light with great rejoicing in heaven and on the earth.


regards Martin

Lambton28/04/2015 09:58:31
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694 forum posts
2 photos

Martin,

Surely these are the instructions for a Super 7 rather than a much older Myford "M" type.

Ady128/04/2015 10:35:54
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6137 forum posts
893 photos

I will do a thread to make it easier to find in the future

Did the yahoo site not have anyone who could help?

Malcolm Bannister28/04/2015 12:43:42
20 forum posts

Thanks... I'll have a look at the Yahoo site.

Neil Wyatt28/04/2015 19:21:49
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19226 forum posts
749 photos
86 articles

The answer should be somewhere on this page:

www.lathes.co.uk/drummond-headstocks/

Neil

Malcolm Bannister14/05/2015 13:11:28
20 forum posts

Thanks Neil. Just the job!

Ady114/05/2015 14:27:35
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6137 forum posts
893 photos

I put an adjustmentv thread here

Ady114/05/2015 15:03:23
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6137 forum posts
893 photos

And the specific answer to your OP is the adjustment collar on the back of the spindle will remove any float

undo the locking grubscrew, screw to finger tightness then tighten the locking grubscrew

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