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Author Topic: Lightening coil springs  (Read 514 times)

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mselic

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Lightening coil springs
« on: July 12, 2018, 06:16:40 PM »

Does anyone know a way to lighten (reduce the tension) of coil springs for buttons on a keyboard? I’ve lightened the springs on a Hohner keyboard, but those are a different from coil springs. Alternatively, can anyone recommend vendors of different sizes and tensions of coil springs that would be suitable for a keyboard in a one-row? Thanks.

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Steve_freereeder

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Re: Lightening coil springs
« Reply #1 on: July 12, 2018, 07:23:15 PM »

Does anyone know a way to lighten (reduce the tension) of coil springs for buttons on a keyboard? I’ve lightened the springs on a Hohner keyboard, but those are a different from coil springs. Alternatively, can anyone recommend vendors of different sizes and tensions of coil springs that would be suitable for a keyboard in a one-row? Thanks.
Try Carini (Italian accordion parts supplier) but good luck in navigating their website; it's not the easiest!
'Spiral' springs here.

Edit:
I see Charlie Marshall has coil springs here. Charlie's a lot easier to deal with!
« Last Edit: July 12, 2018, 07:25:36 PM by Steve_freereeder »
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Aunty Social

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Re: Lightening coil springs
« Reply #2 on: July 12, 2018, 08:21:16 PM »

Lee Springs have a calculator that's useful . https://www.leespring.com/
If you click on the link for "Compression springs" it will take you there.
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tirpous

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Re: Lightening coil springs
« Reply #3 on: July 12, 2018, 08:30:34 PM »

Never tried it, but I've been told you can insert a screwdriver blade (like a wedge) between adjacent coils to stretch the spring and make it permanently longer.
« Last Edit: July 12, 2018, 10:33:49 PM by tirpous »
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Pete Dunk

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Re: Lightening coil springs
« Reply #4 on: July 12, 2018, 08:48:56 PM »

Lee Springs have a calculator that's useful . https://www.leespring.com/
If you click on the link for "Compression springs" it will take you there.

The springs in question are what Lee Springs describe as "Extension Springs", I think they are more commonly called expansion springs in the UK. Compression springs do exactly the opposite to extension springs.
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mselic

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Re: Lightening coil springs
« Reply #5 on: July 16, 2018, 03:28:38 AM »

Never tried it, but I've been told you can insert a screwdriver blade (like a wedge) between adjacent coils to stretch the spring and make it permanently longer.

This method worked.  Thanks!

Thanks everyone else for the info - much appreciated.
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george garside

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Re: Lightening coil springs
« Reply #6 on: July 16, 2018, 09:56:39 AM »

Might be simpler to  exercise the fingers to strengthen them up a bit

george ;)
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mselic

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Re: Lightening coil springs
« Reply #7 on: July 16, 2018, 12:37:42 PM »

Might be simpler to  exercise the fingers to strengthen them up a bit

george ;)

Fingers get plenty of exercise ;)

The springs on 4-stop boxes can often be more stiff than they need to be, and reducing some of that tension is usually an improvement.
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Melodie in D, Hohner HA114s in G and A, Hohner Erica in A/D
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