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ML7 / Super 7 tailstock

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Bob Lamb01/10/2011 14:42:38
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117 forum posts
27 photos
Possibly as silly question but can anyone please tell me if an ML7 tailstock will definitely go straight onto a Super 7? There is one on Ebay at the moment with a graduated dial on it - just thinking it would be quite nice and if it has gone by the time I get home I'll know someone else thought the same!
Thanks - Bob
Phil P01/10/2011 15:11:36
507 forum posts
137 photos
Hi Bob
 
I have done exactly what you are asking about.
 
I have a Super 7B with a standard tailstock for normal use, but also have an ML7 tailstock which is fitted with the hard to find Cowells capstan rack feed attachment.
 
This is used for when I need to cut small threads with a Coventry die head ( I hate using split dies)
 
Phil
 
 
Bob Lamb01/10/2011 16:15:40
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117 forum posts
27 photos
Thanks Phil - I was almost certain it would fit but it's great to be able to confirm things so easily -I was thinking about the Cowells rack feed....... I'll keep looking.
 
Bob
Colin Seggie09/11/2013 09:11:16
25 forum posts

Does that mean that a super 7 tail stock will also fit a ML7?

Alastair

Phil P09/11/2013 11:28:23
507 forum posts
137 photos

I would say 99% yes, but I have not actually tried it myself.

Phil

daveb09/11/2013 21:23:08
609 forum posts
10 photos

Yes, it will. I had an ML7 with both original tailstock and S7 Type, tool ejector was useful and drilling much easier. I also replaced original cross and topslide with S7 parts, huge improvement when used with Rodney milling attachment, and much better for turning.

Dave

Nobby09/11/2013 23:22:53
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587 forum posts
113 photos

Hi Bob & Guys
When i got my s7 Mk1 in a sorry state there was no tailstock no x slide feedscrews and dials It was rusting away in a coal bunker next door to my .mate who rang me I picked it up for a fiver that was in 1986 . Could not find one so I fabricated one and made new dials etc I enjoyed doing it in my home workshop using a 1926 pedal driven Exe latheusing fixed steady
Nobby

Colin Seggie10/11/2013 09:51:41
25 forum posts

Thanks guys, that is great news I will keep on the look out for one.

Alastair

Brian Wood10/11/2013 10:41:24
1966 forum posts
37 photos

The tailstocks will fit the bed OK but it would be wise also to check that the centre height above the bed is the same.

Simple check, compare the height of the centreswhen closed up to the headstock, there might be a few thou difference visible then with a feeler gauge held between the points; if vertical they are the same, leaning towards the headstock makes the tailstock centre high.

Brian

Stub Mandrel10/11/2013 16:16:52
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4306 forum posts
291 photos

According to G H Thomas's book you can't even guarantee that any two S7s or any two ML7s have exactly the same centre height, apparently there were significant differences bewteen some batches. But you my be lucky!

Neil

Peter Love 114/10/2017 21:49:13
12 forum posts
2 photos

This is and old thread but here goes, I have a S7 that came with a buggered MT2 taper in the tail stock, it won't hold MT2 tails without slipping, I gave it a bash with an MT2 reamer but still no good, too many low points where it has been abused, I also have a ML7 almost complete, I note that the ML7 tailstock is hollow will it work with a draw bar I wonder so that I can use a Coventry die head without it moving. Peter.

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