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Dead centre temper.

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Steve Crow16/05/2018 18:36:43
429 forum posts
268 photos

I've made a few dead centres for my watchmakers lathe but I can't seem to find any information on the right temperature/colour for tempering.

Can anybody help?

Steve

Brian H16/05/2018 20:00:51
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2312 forum posts
112 photos

What material have you used to make your centres?

Brian

Roderick Jenkins16/05/2018 20:09:40
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2376 forum posts
800 photos

For a carbon (silver) steel Tubal Cain recommends 200C, which is pale yellow - the first hint of colour when tempering.

HTH,

Rod

Steve Crow16/05/2018 21:00:56
429 forum posts
268 photos

I'm using silver steel.

Thanks Rod. That's harder than I thought.

Steve

Mark Rand16/05/2018 21:55:04
1505 forum posts
56 photos

Hard as you can get it for the dead centre. Either soft or about 30HRc for the live (headstock) centre, so you can turn it concentric when needed.

not done it yet16/05/2018 22:13:11
7517 forum posts
20 photos

A kitchen oven is good enough for that, as long as the thermostat is accurate (or you know the error!).

Steve Crow17/05/2018 07:38:31
429 forum posts
268 photos

Thanks all! Gas mark 6 it is then - if I can get the lid off my Fray Bentos pie.

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