Myford ML7 spindle nose dimensions

[Ian Lee 4Participant @ianlee4]

[Ian Lee 4Participant @ianlee4]

Can ayone tell me what the dimensions are for the spindle nose on an ML7 , I want to make an adapter for one of my ER32 collet chucks which was made fit on a Myford.

 

I am making the adapter to fit the chuck on a spare Cam lock backplate on my Chester Conquest lathe.

 

I need the thread pitch and diameter and the diameter and recommended lenght of the location shoulder.

 

 

[mgjParticipant @mgj]

The register diameter you can measure, and the depth will be measurable too, less an allowance for the threading runout groove. You will need to turn to 1.250  +.00002/ +.00005 if you want it to really run true. (Keep it well oiled with 3:1)  As long as it clears the actual depth of the register is not critical.

 

 The ones I have cut for mounting stuff on a VDH, and putting a boring head into the Dore Westbury have had registers about 1/2″ long. The one supplied on the BS0 dividing head, which is perfectly secure is not much more than 3/8″ long. 

 

The thread is 1 1/8  x 12  55deg Whit form, but you wil need to ensure the crests are truncated a fraction, to be sure it doesn’t hang and the register and back flange are doing the aligning..

[mgjParticipant @mgj]

Can you correct the dimensions – I’ve put the decimal point in the wrong place. +2 tenths of a thou to + 5 tenths. Apologies

Edited By meyrick griffith-jones on 30/09/2009 00:18:52

[David HaythornthwaiteParticipant @davidhaythornthwaite90386]

If it helps, I made a collet adapter as you are making and I kept the measurements that I used for this. I will email you and attach a Jpeg of the details.

If you can get hold of MEW Feb 99, Giles Parkes details the dimensions of an adapter, but if you use this BEWARE – the boss needs boring out to 1.018″ for screwcutting NOT 1.108″ as printed in the article.

[mgjParticipant @mgj]

Damn -put it down to a streaming cold and late at night. the thread is 1.250 x12 whit and not 1.125×12. Should have known because I only did one only the other day.

 

Got myself totally crossed up there.Pity there isn’t a delete post facility.

 

Buy a Model Engineers Handbook (3rd edition)by Tubal Cain. The dimensions are in there as is all the threading data.

Edited By meyrick griffith-jones on 30/09/2009 12:09:18

[John Stevenson 1Participant @johnstevenson1]

Posted by meyrick griffith-jones on 30/09/2009 12:07:36:

Damn -put it down to a streaming cold and late at night. the thread is 1.250 x12 whit and not 1.125×12. Should have known because I only did one only the other day.

 

 

Sorry ??

Myford thread is 1 – 1/8″ x 12 Whit form, Register is 1 – 1/4″

 

John S.

[Ian Lee 4Participant @ianlee4]

Many thabks to all for the info I’m hoping to start on the adapter tonight providing grandad duties don’t  get in the way

[mgjParticipant @mgj]

Still got the streaming cold

 

I really got myself into a tiswas over this one.

 

Anyway mine did fit fine first time, so perhaps the doing is easier than the writing. Apologies.

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