USE/CARE OF HANDTOOLS & MEASURING TOOLS - OD1621 - LESSON 2/TASK 2
MACHINIST'S AND BLACKSMITH'S CHISELS.
(b) Diamond Point Chisel.
The machinist's diamond point chisel
(figure 81) has a solid point and is used to cut V-grooves, for drawing
holes, and for cutting holes in flat stock.
(c) Cape Chisel.
The machinist's cape chisel (figure 81) has a
point which is smaller than that of a diamond point chisel. It is used to
cut keyways or slots in metal, and also for dividing up work so that a flat
chisel can be used for finishing.
(d) Roundnose Chisel.
The roundnose chisel (figure 81) has its
cutting edge ground at an angle of 600 with the axis of the chisel. When
roundnose chisels are used to bring drilled holes, just started, concentric
with the laid out drilling circles, they are called center chisels.
roundnose chisel is also used for cutting channels, such as oil grooves and
Roundnose chisels are of similar shape to the cape chisel,
with one edge ground flat, and the other edge making a round cutting edge.
The stock of these chisels is usually octagonal (eight sided) in shape.