Smart and Brown 1024 Lathe Norton box and 2 speed box

[Tony Bradley 1Participant @tonybradley1]

Trouble with gearing on 1024 S&B Lathe

[Tony Bradley 1Participant @tonybradley1]

Hello,

Does anyone have any experience with the Norton Box and the 2 speed (fast and slow) box on a Smart and Brown 1024 Mk1 lathe ?

I've recently purchased a S&B 1024 Mk1 Lathe and it has a few issues with the selection of the gearing. Firstly I can only select 4 of the 8 speed ranges on the central dial and secondly the fast slow selector seems to be jammed.

If anyone has any experience and can advise with these 2 issues I would greatly appreciate it ,

Thanks

Tony

[Clive FosterParticipant @clivefoster55965]

Tony

Best to join the Smart & Yahoo group and ask there **LINK** . Quite bit of information in the files.

I've got most of a strip down and re-assembly guide in HTML format for the Mk1 with lots of nice pictures. Except the pictures for the speed change gearbox aren't there. If you ask on the forum odds are some-one will know the original source for those files. I've lost the source details somewhere in computer black hole space. Pretty sure the files I have aren't actually mine to give away but if you went to the original source and asked nicely you could get them.

My 1024 is a Mk2 VSL which has a completely different drive system so I can't help much except to say that the gearbox front needs great care when removing. Are you sure the central locking knob on the Norton box is unscrewing fully? Mine can be bit reluctant to shift if I'm lazy and only go about 3/4 of the way.

Best of luck.

Clive

[Tony Bradley 1Participant @tonybradley1]

Thanks Clive for your response and advise. I'll get on to the Yahoo group. I've managed to get the 2 speed box working tonight, it turned out to be the linkage, which I tightened up and the fact that it hasn't run for a while, once it changed once it started to work fine.

Not so much luck yet withe the 8 speed selector, yes its unwound fully but seems to stick between 4 and five and I really don't want to turn it too hard. I'll have to find out where its binding,

thanks

Tony

[Clive FosterParticipant @clivefoster55965]

Tony

Glad you have the 2 speed box working. Reading the strip-down description, without pictures, the insides sound a bit hairy for the uninitiated.

I presume you have already discovered that removing the screw cutting and feeds data plate on the Norton box reveals a decent size, square, inspection hole which gives quite good view of the action of the selection mechanism.

Thinking about your problem the internal hub of the 8 position selector has a pin which drops into a hole in the front cover at each selected gear position. There is a plug in the hole defining how far the pin can go into the hole which sets the sliding gear engagement depth. If, for some reason, the pin has shifted in the hub its possible that it may not be clearing the cover casting properly when attempting to move between positions 4 and 5 hence the sticky action.

Can't really see how something like that could have happened but careless users can create funny problems. For example when I got my VSL the back gear selector had lost its position detents so central neutral and the high – low speed positions had to be guessed at. How you can bollix up a completely enclosed spring, ball and three dimples system in a part that "never" needs to come apart is beyond me. But clearly not to previous user.

Clive

Edited By Clive Foster on 02/12/2018 22:42:51

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