643JZ Starrett Dial Depth Gage, 0-.125* Range, .0005* Grad, 0-25-0 Dial with Case

643JZ
Starrett Dial Depth Gage

Dial Depth Gages
0- .125", 2-1/2" base

This gage has a knife-edge base and a needle point contact which has
been hardened and ground . The knife-edge base has a cutout so that
the conical point can be precisely positioned for close work . Point is
1/2" (12 .7mm) long with a 60º included angle .
In action, the inspector gently pushes the point down to read zero with
the base and then pushes down to make the needle point contact the
workpiece to take the measurement .