New Haven Strike Spring

Nicko

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Hi All,

This movement is from the New Haven "Danube" that was ID'd in the Clocks thread.
I have been asked to repair this movement. The main spring is cracked and the strike string is missing as well as a few other disasters.
Can anyone tell me the correct spring to use for the strike mechanism. The one in there is 1/2" wide by about .018" wide. Length unknown.

Thanks
Greg
 

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AllThumbz

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Nicko said:
Hi All,

This movement is from the New Haven "Danube" that was ID'd in the Clocks thread.
I have been asked to repair this movement. The main spring is cracked and the strike string is missing as well as a few other disasters.
Can anyone tell me the correct spring to use for the strike mechanism. The one in there is 1/2" wide by about .018" wide. Length unknown.

Thanks
Greg
For 8 day American clocks I have used Timesavers 8-DAY MAINSPRING 3/4 (Part: 14200) 3/4" x .018 x 96" American made loop end eight day mainspring. Metric equivalent is 19.0 mm x 0.46mm x 2438mm which sells for $7.50 each. I like American made steel.

They also have a MAINSPRING 5/8 x .0175 x 96 (Part: 14222)
Loop end mainspring is made in India. 5/8" x .0175 x 96". Metric equivalent is 16.0mm x 0.44mm x 2438mm for $8, and

1/2 X .015 X 84 LOOP END MSPRG (Part: 16870)
Loop end mainspring is made in Germany. 1/2" x .015" x 84". Metric equivalent is 12.7mm x 0.38mm x 2137mm for $10.50.

Those are the closest I see on their site.

Hope this helps.

Looking2Learnclox
 

lpbp

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Looks like I got beat, while doing this post. I think you'll find that 96", is the one that fits, I would not use the made in India spring, they have inferior steel.

Larry Pearson, FNAWCC* #35863
 

shutterbug

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I've been using the India made springs, and haven't been bit in the butt yet, but I think I'll take the precautions about them to heart. I have not encountered a premature break though, so they might work fine for you if you want the $ savings. It's around $5.00 cheaper - not enough to take chances for :)
 

Nicko

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If they are the same thickness, taking up the same space then the length would be the same, so 96" it is.

I have read that some repairers claim that the original mainsprings were overpowered and use a thinner mainspring than original, say 3/4 x .0165 x 96. Any thoughts on this?
I reckon you could re-tyre a wagon wheel with this one.
 

AllThumbz

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Nicko said:
If they are the same thickness, taking up the same space then the length would be the same, so 96" it is.

I have read that some repairers claim that the original mainsprings were overpowered and use a thinner mainspring than original, say 3/4 x .0165 x 96. Any thoughts on this?
I reckon you could re-tyre a wagon wheel with this one.
Nicko,
I have read and heard that too. And Timesavers does sell a slightly thinner alternative for those who feel that way. I dont have the number handy but would be glad to grab it off their site for ya. Personally, I like to put back what was there originally, best as I can. I too, prefer the American steel- for a few dollars, it isnt worth the risk of a break and having to replace it again, which is a pain for me since Im not that experienced as most of the other fellas here.

Looking2Learn
 

lpbp

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You started the discussion asking the size of the strike spring. It is 5/8x.018x96, somehow the discussion has changed to the time spring. I recommended not using the India springs because of experience, having them come back after a couple of years with set springs. Thank goodness I only used a few of them, and never again.

Larry Pearson, FNAWCC* #35863
 

Nicko

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LookingToLearn,
Thanks for the offer, but I have to place another order for clock parts soon, I'll order it then

Larry,
Yes, I did deflect the topic to mainsprings. To keep on topic, the strike spring stub that is left is 1/2" wide by .018" thick. You and others have confirmed that it should be the same length and thickness as the main spring. You wrote 5/8" wide so I checked the arbour width and is only .500" wide.
I''l keep in mind the comments about the cheaper springs.

Thanks again for taking the time to reply.
Cheers
GN
 

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