double striking hammers

Vince Mrykalo REEVESJ@ucs.byu.edu
Mon, 02 Oct 1995 15:27:33 +0000 (MST7MDT)


> I've run into the same thing and the only advice I can give is to make sure
> you DO have 1/8" letoff and a further 1/8" drop, that the rep springs aren't
> too tight and the rep lever is not too loose in the bushings. I would think
> if the letoff was too close because it was checked with literally no blow
> that there might be enough flex in the shank to cause problems once all the
> parts get moving.

John,
Thanks for the prompt reply!  I only changed the drop to a scant
1/16th" below let-off, actually adjusting drop so that the rep
contacts the drop screw the same time that the tender contacts the
let-off button, so I'll go back and change the drop as you suggested.
The springs were done on the weak side.
But it still puzzles me.  I would think that the flexing you speak of
is not the cause, because let-off is done slowly, which would mean
veritibly no flexing.  I'm thinking that the shape of the knuckle
might be the cause, or, as I mentioned earlier, bevelling the jack
top on the hammer side.  I would like to get at the symptom.

---
vince mrykalo  rpt

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If you are not enjoying your work, you are not charging enough.
-Vic Benvenuto
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