hammerhead mass

[stanwood]

Stephan wrote:

>Stanwood said:
>> Note: The hammer weight may be found by
>> subtracting the shank strike weight from the strike
>> weight.  The shank strike weight is the weight of the
>> shank taken at the strike line radius.
>>
>This definition of shank weight is not clear to me. David please
>clarify.

Quoting from my posting of 1/11/95:

Measuring strike weight:

1.Remove the shank from the rail
2.place a hard felt wedge on the pan of a digital scale
  and tare to zero.
3.Place the striking surface of the hammer face down on
  the felt wedge such   that the strike line of the hammer
  is resting on the knife edge of the     felt wedge
4.Tip up the flange so that it is oriented vertically,
5.Rest the bottom end of the flange on a roller bearing
  such that the axis   of the roller bearing is aligned
  vertically with the axis of the center pin, with the
  shank perfectly horizontal.
6.The resulting scale reading indicates the strike weight.


To measure shank strike weight use the above method but with the hammer
removed and the end of the shank resting on the felt wedge.

David Stanwood