Thursday, January 23, 2014

Die Retainer Pin Modification

The quick change die holder system on my power hammers has worked very well for years.  After I got the rhythm of using them worked out I rarely dropped a keeper during a die exchange.  However, there was one with one problem.  The drop pin which locks the key in place is tethered to the key and the tethers have a tendency to break.

The first tethers were long leather strips. However if a hot work piece contacted the leather it would burn through it.  Later I tried a heavy nylon cord and that worked even less well for the same reason.  The current tethers are steel chain.  They have worked so well I think they may be the end of the story.

Keeper Key and pin in locking position.

Keeper key and pin in storage position.

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