DAMMERR
Heads
After making 5
DAMMERRs, I changed the pick from a pyramidal shape to one
with radiused faces. All the radiuses have roughly 6 inch
radiuses and are created using a circle cutting jig on a
vertical band saw. I made 11 of these heads and then further
modified the shape by creating a 1 inch radius hook on the
underside of the pick.
Three “Stubbie”
heads were created. These have a 6” radius on all four side
of the pick and is a lighter version of the curved head.
These are how I get rid of a piece of steel that is
too short to made a full sized head.
There is a steel
spring pin that provides extra security holding the head on.
The steel pin passes through the head, the handle and the
wedge. On the handles that are reinforced with a steel tube,
the pin also passes through the steel tube. In the drawings
below, the hole for the pin is shown offset towards the
handle, later heads have the hole centered so it has better
connection with the wedge. All the heads have been made of
4140/4142 steel square bar stock. They have been hardened by
oil quenching from 844 °C and tempered at 316 °C for a final
hardness of Rockwell C50
First DAMMERR head
Second
type DAMMERR head
Third type DAMMERR head
DAMMERRs #9 and #13, 13 has a "Stubbie"
head and a fiberglass handle
DAMMERR heads 26 through 31
DAMMERR 39 with pin centered in head and "Iron Bound" handle