hammer "throw" on hard blow

[V T]

Hi David,

When hammers are bored, it's really important to drill
the hole so it passes right through the vertical
center line of the moulding.  (This imaginary line is
inside the moulding.)  The desired effect is to
ditribute the mass of the hammer about evenly on both
sides of the hammer shank.  I often see hammers that
are not bored very accurately and the heavier the
hammer, the worse the problem will be.

This too is an approximate solution to the problem. 
On bass hammers where you might have, say, 15 degrees
of angle on the hammer relative to the shank, the
weight on one side of the hammer will be closer to the
action center than the weight on the other side.  That
really isn't balanced either.  However, you can see
that the problem could be quite serious on a heavy
bass hammer that has been drilled off center, and in
such a manner that the side that has its mass further
from the action center is also further from the shank.

In that case, you have an unbalanced mass that is
about 5" away from the center pin, so that can cause
quite a distoring force on the bushing and the shank.

Hope that applies to the problem on hand.

Vladan


		
____________________________________________________
Start your day with Yahoo! - make it your home page 
http://www.yahoo.com/r/hs