[CAUT] vertical hammers

[Cy Shuster]

The hole bored in the hammer molding doesn't go all the way through, so it's 
like a cylinder head.  Inserting the hammershank makes it work like a 
piston.  Trapped air becomes pressurized, and until the glue sets, it both 
acts as an air seal and a lubricant.

The hammer can then be pushed back towards the end of the hammershank, out 
of alignment, unless the air pressure is released.

--Cy Shuster--
Bluefield, WV

----- Original Message ----- 
From: "Jeff Olson" <jlolson@cal.net>
To: "College and University Technicians" <caut@ptg.org>
Sent: Saturday, July 16, 2005 8:31 PM
Subject: Re: [CAUT] vertical hammers


> Just to be clear -- what bad (or inferior) result is supposed to occur if 
> you don't notch a hammer shank or punch a tiny hole in the hammer to allow 
> pressure-release?
>
> Best,
>
> JeffO