The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose

by Thomas Walter Barber

[2046]. Chain cutter.

[2047]. Hollow taper bung borer. Bores a taper hole by enlarging a plain hole bored by an ordinary bit.

[2048]. Square hole boring bit, for wood. A square chisel containing a twist borer.

[2049]. Turning tool for metal. Front tool.

[2050]. Turning tool for metal. Knife tool.

[2051]. Chasing tool for V threads.

[2052]. Turning tool for metal. Screw tool for square thread.

[Larger plate.]

[2053]. Turning tool for metal. V tool.