:  -----Original Message-----
:  From: oldtools-bounces@r...
:  [mailto:oldtools-bounces@r...]On Behalf Of Thomas
:  Conroy
:  Sent: 07 August 2008 21:41
:  To: oldtools@r...
:  Subject: [OldTools] Loose chisel fix
:
:  Thomas Conroy posted:

:  A few weeks ago I posted about a Hibbard, Spencer and Bartlett
:  1-1/2" bevel-edged socket chisel I found. I filed and ground
:  away mushrooming of the socket and made a handle out of narra.
:  The socket weld is a bit sprung so I didn't want to strain it by
:  pounding on it, and the chisel is fairly long and light; so I
:  made a push-only handle for paring.

Now this took me back some 63 years to the time when invincible men tried to
teach me some applied maths, so I tried to construct a vector diagram to
understand why two fairly gentle tapers when pressed together can hold very
strongly. I had morse taper lathe centres, drill chuck arbors and suchlike
in mind.

I seems to me that since Thomas's socket weld is 'a bit sprung'  whatever
happens inside these tapers has very ltttle chance of producing the
frictional forces that usually holds them in place because of the 'give' in
the system. Some of us know too well what happens if we try to mate two
dirty or damaged tapers.

Hence, desperate situations demand desperate remedies of which the leather
seems the most sympathetic. I too would have settled for epoxy.

Jeff, relishing the sound of the word 'orgeuil'.
--
Jeff Gorman, West Yorkshire, UK
http://www.amgron.clara.net

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