View Full Version : Pinging aboard epsilon and anyone else who knows gear trains for a S and B 10 24 vsl

Alistair Hosie
11-09-2006, 04:11 PM
Hi Mark MY lathe as you know is metric it is not cutting metric so what gears should I have in the gear train???? what do you have ????
As I understand it it should be 30drive 120 driven and 120 drive but I have 30 drive two 120's side by side and a 54 driven caan you help me Alistair

11-09-2006, 05:38 PM
There should be only the two 120's and the 30 if set up for standard. (simple train ...3 gears)

With these three gears you just set the handles and all metric pitches are available

The 54 should not be there that's for a train that is not listed.

I cannot find any reference to a gear with 54 teeth in my book that covers both metric and imperial roundhead models.

The 54 teeth gear is a special that has been made up by someone ...at least that's what it looks like reading this book.

if its not enguaged with any other teeth ..it is being used as a shim ...i do this ...you have to, to stop the gears in some set-ups moving on the shaft.

But I do it with one of the standard gears that came witrh the machine.

Perhaps there is a shim that normally comes with the machines and gets lost.


The full compliment of gears to cut all pitches on a metric Roundhead machine should be (these are for use with a compound train... 4 gears)

127 , 125 ,108 ,15 ,100 ,95 ,
90 , 81 ,80 ,73 ,72 ,70 ,66 ,
65 ,60 ,56 ,53 ,50 ,46 ,43, 42 ,
40 ,39 ,35 ,31.

I'm not going to tell what my machine came with this will only confuse you .

So to sum it up ...
Take off the 54 tooth gear ...
Assemble 3 gears 120 120 and 30 into simple train ...and you got the standard metric set-up.

Any set-up that is not metric will involve a four gear compound train..
with the extra gears used in conjuction sometimes with the 120's and 30.

hope that all makes sense.

All the best...mark

Alistair Hosie
11-09-2006, 07:08 PM
Thanks mark that makes perfect sense but the gears ase slightly differeent the 120's are held with four allen key bolts directly through the gears side and the fifty four is held with a central allen key bolt are these easily interchangable?on top of this I will need to buy plus gas asone of the hex bolts is too stiff to turn .Perhaps if I sent you a pic you could see it anyway thanks for tonight as I am too tired to post pics will do it tomorrow regards Alistair

11-09-2006, 07:24 PM
Carefull there ..could be left hand threads on them nuts.

and there should ...or could be a tiny shearpin under one of them ...easily lost .

not sure if the shear pin was a mod carried out by Alwyn the previus owner of my 1024

Rounded off nuts are best tackled with special sockets that grip on the flats and not the corners .
available from RS electronics ...by the name of Richmond metrinch .

Cant tell you a lot more as i dont habve the VSL manual

Also put all this you've just put here in the smart and brown yahoo gropup ..

There are loads of vsl owners there.

All the best...mark

11-09-2006, 07:42 PM

http://cgi.ebay.co.uk/Metrinch-Metric-AF-Whitworth-Socket-Spanner-Set_W0QQitemZ7551648034QQihZ017QQcategoryZ63918QQr dZ1QQssPageNameZWD1VQQcmdZViewItem

Al Messer
11-09-2006, 09:46 PM
Alistair, according to this 1942 edition I have of the South Bend Manual, the 54 tooth gear is used for cutting the following non-Metric threads:

4-1/2, 18, 27, 54

This is for a 10 inch "S" standard change gear lathe. Hope this helps.

Ignorant question: Does your lathe have a Metric pitch lead screw or an English pitch lead screw?

Alistair Hosie
11-10-2006, 07:51 AM
my lathe has a metric leadscrew and the sheer pin is behind the 30 tooth so your pal did not fit it if you like I can email you the full not the partial manual which tells all.Alistair

Al Messer
11-10-2006, 09:22 AM
Thanks for the offer, but that will not be necessary as I only cut English threads.

Alistair Hosie
11-10-2006, 10:25 AM
The offer of the manual was meant for mark sorry Al the portion about leadscrew was for you my brain is not functioning today Alistair

11-10-2006, 12:48 PM
BOTH MANUALS user and parts

What I wrote there further up is .........in answer to your first post.
Was an interpretation of me reading the manual for over an hour and trying to make head or tail of it .

and putting it into simple plain clear english language a monkey could understand ..

So dont think ...that I have just copied it strait in ...I've tried my best ...for you Alistair.

Download them ...by all means ...I can tell you now ...you wont end up any wiser. ...lol

ALL the best...mark

Alistair Hosie
11-10-2006, 05:31 PM
wher is Adrians site???:DAlistair

Alistair Hosie
11-10-2006, 05:32 PM
where is Adrians site???:DAlistair

11-11-2006, 08:24 PM