ML7 / Super 7 tailstock

This topic has 11 replies, 8 voices, and was last updated 14 October 2017 at 21:49 by Peter Love 1.

Viewing 12 posts - 1 through 12 (of 12 total)

Author

Posts
1 October 2011 at 14:42 #75652
Bob Lamb
Participant
@boblamb44747
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
Advert

1 October 2011 at 14:42 #21942
Bob Lamb
Participant
@boblamb44747
1 October 2011 at 15:11 #75654
Phil P
Participant
@philp
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
1 October 2011 at 16:15 #75657
Bob Lamb
Participant
@boblamb44747
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
9 November 2013 at 09:11 #134977
Colin Seggie
Participant
@colinseggie44298
Does that mean that a super 7 tail stock will also fit a ML7?

Alastair
9 November 2013 at 11:28 #134987
Phil P
Participant
@philp
I would say 99% yes, but I have not actually tried it myself.

Phil
9 November 2013 at 21:23 #135078
daveb
Participant
@daveb17630
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
9 November 2013 at 23:22 #135099
Nobby
Participant
@nobby
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 lathe
Nobby
10 November 2013 at 09:51 #135126
Colin Seggie
Participant
@colinseggie44298
Thanks guys, that is great news I will keep on the look out for one.

Alastair
10 November 2013 at 10:41 #135131
Brian Wood
Participant
@brianwood45127
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
10 November 2013 at 16:16 #135152
Sub Mandrel
Participant
@submandrel
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
14 October 2017 at 21:49 #321481
Peter Love 1
Participant
@peterlove1
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.
Author

Posts