A COAL AND ROCK CUTTING PICK

摘要

The pick (1) includes a radially inner end (4) and a shank (3) to be fixed t o the drum (10) to substantially prevent relative movement between the pick (1 ) and drum (10). The pick (1) further includes a cutting head (2) having leadi ng (5) and trailing faces (6) intersecting to provide a cutting edge (8) to extend generally parallel to an axis. The leading face (5) in use is incline d by an acute rake angle R to a radius of the axis, with the trailing face 6 being inclined at an acute back clearance angle B to a plane passing through the edge (8) and normal to the radius. The leading face (5) and trailing fac e (6) being inclined by an acute angle and the shanks when fixed to the drum (10) extends at an acute angle to the radius.