Method and apparatus for driving a bolt

A driving assembly for removal of liner bolts, said assembly comprising:

• a driving member having a concave driving face configured to complement a convex face portion of a liner bolt shank;
• a guide pin associated with said driving member and configured to cooperate with a concave depression in said liner bolt shank to guide said concave driving face of said driving member into contact with said convex face portion of said liner bolt shank.

A method of removing a liner bolt with a driving member from within a range of impact angles, said method comprising:

• providing a convex face portion at an end of a bolt shank, said convex face portion configured to substantially complement a portion of a concave driving face of a driving member;
• and
• providing a concave depression in said end of said bolt shank, said concave depression configured to receive a guide pin associated with said driving member such that said guide pin and said driving member may be oriented at an angle to said bolt shank during impact.

A method of manufacturing a driving assembly for use in driving liner bolts within a range of impact angle, said method comprising:

• forming a concave driving face on a driving member configured to cooperate with a convex portion of an end face of a liner bolt shank, and
• disposing and biasing a guide pin to extend from within said driving member such that said guide pin seats within a concave depression in said bolt shank to guide said driving member into contact with said liner bolt shank.