Coal Boring Bit

Coal Boring Bit

Coal Boring Bit.
Coal Boring Bit. Made from Iron and Tungsten. Size 4″ x 2 1/2″ inches.

This big sized bit was inserted into the shaft of a long twist drill rod and used to bore holes in the coal for shotfiring. A bit of wire was inserted through a hole in the end of the rod to hold the bit in place.

Share Button

Leave a Reply

error: Content is protected !!