After making 5
DAMMERRs, I changed the pick from a pyramidal shape to one
faces. All the radiuses are roughly 6 inches 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. The 1 inch radius is simply hand
shaped on a spindle sander.
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
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