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#4600246 - 12/10/17 09:15 PM Making new springs?
JHZR2 Offline



Registered: 12/14/02
Posts: 41767
Loc: New Jersey
Need to make a new spring for this:



A piece from an old mortise lock.

What's the best source/approach? Are there special methods for bending springs so they work properly?

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#4600255 - 12/10/17 09:25 PM Re: Making new springs? [Re: JHZR2]
andyd Offline


Registered: 09/25/04
Posts: 7136
Loc: Marshfield , MA
Go to the right flea mkt. Get an entire lock or a reproduction hardware site or McMaster Carr??
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#4600268 - 12/10/17 09:43 PM Re: Making new springs? [Re: JHZR2]
Chris142 Offline


Registered: 06/05/03
Posts: 16817
Loc: Deplorable in apple valley, ca
How big? The ignition points i put in my tractor looked like that.
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#4600286 - 12/10/17 10:29 PM Re: Making new springs? [Re: JHZR2]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
If you cannot find a reproduction,

you can get the correct type of steel, anneal it (soften)

cut, shape, form......

Hardening it to the correct temp is very, very tricky to do on a part that small.
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#4600423 - 12/11/17 06:48 AM Re: Making new springs? [Re: JHZR2]
JHZR2 Offline



Registered: 12/14/02
Posts: 41767
Loc: New Jersey
Fortunately it's a non critical part, just want it right...

What is the right type of stee?

I'm not interested in a reproduction lock set, this one works perfect aside from this spring. Something else had fallen inside of the assembly, which can be understood after nearly 100 years...

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#4600443 - 12/11/17 07:25 AM Re: Making new springs? [Re: JHZR2]
Trav Offline


Registered: 11/20/06
Posts: 18836
Loc: MA, Mittelfranken.de
Start off with this..

https://www.ebay.com/itm/FLAT-SPRING-STEEL-ASSORTMENT-MORTISE-LOCK-REPAIR/401307926188?hash=item5d6fd0feac:g:NfkAAOSwPcVVgecN
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#4600445 - 12/11/17 07:26 AM Re: Making new springs? [Re: JHZR2]
ragtoplvr Offline


Registered: 01/14/15
Posts: 528
Loc: missouri
You can order music wire from McMaster Carr if you think a round spring can work. It can bend in hard condition. The Spot weld will be more difficult unless you have a spot welder. You could bend a 90 on the spring and then use some well cured JB weld it might work.

Rod

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#4600462 - 12/11/17 07:44 AM Re: Making new springs? [Re: JHZR2]
ragtoplvr Offline


Registered: 01/14/15
Posts: 528
Loc: missouri
You can order music wire from McMaster Carr if you think a round spring can work. It can bend in hard condition. The Spot weld will be more difficult unless you have a spot welder. You could bend a 90 on the spring, put in in a drilled hole and then use some well cured JB weld it might work.

Rod


Edited by ragtoplvr (12/11/17 07:44 AM)

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#4600547 - 12/11/17 10:26 AM Re: Making new springs? [Re: JHZR2]
AZjeff Offline


Registered: 01/14/11
Posts: 2630
Loc: PV Az
Our Ace Hardware has music/piano wire in 3 foot lengths & different thicknesses.
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#4600560 - 12/11/17 10:42 AM Re: Making new springs? [Re: Trav]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: Trav


Enough there to do a LOT of locks!

Take the one you need, sell the rest again......
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4600566 - 12/11/17 10:51 AM Re: Making new springs? [Re: ragtoplvr]
JHZR2 Offline



Registered: 12/14/02
Posts: 41767
Loc: New Jersey
Originally Posted By: ragtoplvr
You can order music wire from McMaster Carr if you think a round spring can work. It can bend in hard condition. The Spot weld will be more difficult unless you have a spot welder. You could bend a 90 on the spring and then use some well cured JB weld it might work.

Rod


Fortunately it is not a spot weld, just a punched spot to either index the spring or help it stay.

Id like to learn how to properly shape and craft spring steel. Not sure how useful of a skill it will be for me, but it will be fun.

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#4600824 - 12/11/17 03:28 PM Re: Making new springs? [Re: JHZR2]
Kestas Offline



Registered: 06/04/02
Posts: 12324
Loc: The Motor City
Making springs can be difficult. Spring steel is not very ductile. I believe they are formed first, then heat treated to make them "springy." It's called bainitic hardening. That's why spring metal snaps when you try to form them further.

Maybe you can use a metal tube to "sleeve" both ends together.

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