Rock and Coal Boring

Coal Boring Bit. Made from iron and tungsten. Size 2 3/4″ x 1 1/2″ inches. This small 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 …

Coal Boring Bit. Made from iron and tungsten. Size 3″ x 1 3/4″ inches. This medium common 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 …

Coal Boring Bit. Made from iron and tungsten. Size 3 1/2″ x 2 1/4″ inches. This large 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 …

Coal Boring Bit. Made from iron and tungsten. Size 4″ x 2 1/2″ inches. This extra large 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 …

Hardypick Rock Borer. A blast compressed air rock borer type B6 made by Hardypick Limited. Made from iron and spring steel with a rubber handle. Size 21″ x 7″ inches. Weight 18kgs.  This Borer is featured in the Hardy’s 1953 tool catalogue listed as – Simplex Hammer Drill for wet or dry drilling. The Hardy firm was founded in 1870 …

Coal Mining Rock Borer Drill Bits. Made from iron and tungsten. Sizes – Large 4″ x 2″ inches. Small 2 1/2″ x 2″ inches. The smaller bit has two points for drilling and two water infusion holes. The larger one has three points with two water infusion holes. The both bits have an internal screw thread.

Mining Rock Boring Bit. Made from iron and tungsten. Size 5″ x 2″ inches. This larger bit is made from iron and tungsten with an internal screw thread and holes for water infusion.  The image (left) is to show the difference in their sizes in comparison to each other.  

Mining Rock Boring Bit. Made from iron and tungsten. Size 3″ x 1 3/4″ inches. This bit is made from iron and tungsten with an internal copper sleeve and holes for water infusion. This is the common type used in all mines it slotted onto the end of the 6′ foot long boring rod. The image (left) is to show …

Mining Rock Boring Bit & Rod. Made from iron and tungsten. Size 6′ foot long boring rod, bit size 3″ x 1 3/4″ inches. This bit is made from iron and tungsten with an internal copper sleeve and holes for water infusion. This is the common type used in all mines where the bit is just knocked onto the rod …