Endfloat in Headstock Spindle

This topic has 9 replies, 5 voices, and was last updated 14 May 2015 at 15:03 by Ady1.

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28 April 2015 at 08:51 #187955
Malcolm Bannister
Participant
@malcolmbannister38996
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
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28 April 2015 at 08:51 #7594
Malcolm Bannister
Participant
@malcolmbannister38996
28 April 2015 at 09:05 #187956
Martin Kyte
Participant
@martinkyte99762
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
28 April 2015 at 09:58 #187960
Lambton
Participant
@lambton
Martin,

Surely these are the instructions for a Super 7 rather than a much older Myford "M" type.
28 April 2015 at 10:35 #187965
Ady1
Participant
@ady1
I will do a thread to make it easier to find in the future

Did the yahoo site not have anyone who could help?
28 April 2015 at 12:43 #187985
Malcolm Bannister
Participant
@malcolmbannister38996
Thanks… I'll have a look at the Yahoo site.
28 April 2015 at 19:21 #188020
Neil Wyatt
Moderator
@neilwyatt
The answer should be somewhere on this page:

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

Neil
14 May 2015 at 13:11 #189860
Malcolm Bannister
Participant
@malcolmbannister38996
Thanks Neil. Just the job!
14 May 2015 at 14:27 #189873
Ady1
Participant
@ady1
I put an adjustmentv thread here
14 May 2015 at 15:03 #189875
Ady1
Participant
@ady1
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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