... mining and rock drilling. Carbide bit is divided into cross bit, chisel bit and button bit. Choosing a right carbide bit can improve the drilling efficiency ... 1 3/16 6,7 50 1 31/32 6,7,11,12 32 1 1/4 6,7,11,12 60 ... 2 3/8 6,7,11,12 34 1 11/32 6,7,11,12 76 3 6,7,11,12 ... 3 1/2 6,7,11,12 36 1 13/32 6,7,11,12 102 4 6,7,11,12 ... 5 1/2 6,7,11,12 42 1 21/32 6,7,11,12 152 6 6,7,11,12 ...