Missing Strip Spring Needed

[Martin King 2Participant @martinking2]

Hi All, At least I actually know what this fine old tool is for!

It is a rare French leatherworking lasting clamp of some value.

Sadly as can be seen one of the strip type springs is missing and the other is in incomplete shape, it should have little more length and a curl at the top end to bear on the clamp jaw.

I an going to have to take this apart anyway for cleaning and to make new pivot pins as the old ones are too worn, I wll also sharpen up the jaw ghrips a bit.

Can anywone please tell me how to go about making the springs, what material shall I require, heat treatment etc. Never had anything to do with spring construction before. I do at least have a pattern.

Cheers, Martin

[Martin King 2Participant @martinking2]

[Jeff DaymanParticipant @jeffdayman43397]

AISI 1080 steel strip, austemper after forming. Varnish after heat treat for corrosion protection.

[CirclipParticipant @circlip]

Piece of clock spring?

Regards Ian.

[Martin King 2Participant @martinking2]

Thanks guys, how would I rework a piece of clock spring please? I can probably find one of them without too much trouble.

Jeff: Austemper? Details please if possible.

Does one have to 'over bend' the spring to allow for movement or spring back?

Cheers, Martin

[Jeff DaymanParticipant @jeffdayman43397]

If making the spring in 1080 and austempering, do not overbend – make to pattern. Do not scratch or mark the surfaces of the stock.

Austempering according to the pros that do it every day for industry:

**LINK**

[JohnFParticipant @johnf59703]

Martin see your PM's

John

[JohnFParticipant @johnf59703]

Martin sent you a PM

John

Sorry double post Mods please delete — thanks 

Edited By JohnF on 14/04/2019 20:07:51

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