Cleveland Cobalt M42 Square Tool Bit 3/8 x 3 in

Cobalt M42 Square Tool Bit

This Cleveland Cobalt M42 square tool bit is a non-beveled lathe tool blank suited for precision turning and facing operations. The cobalt alloy provides high red hardness for extended tool life when machining abrasive or high-strength materials. It serves machinists and maintenance technicians who grind custom cutting profiles.

Suits custom grinding, not indexable holders

This blank suits users who grind their own tool geometry on a bench or pedestal grinder. Builders who need ready-to-use indexable inserts or pre-formed turning tools with specific chip-breakers should look at something else. The non-beveled square profile requires full geometry creation before use.

3/8 inch square by 3 inch overall length

The single specification that decides fit is the 3/8 in square cross-section combined with a 3 in overall length. This dimension set determines holder compatibility and maximum reach for the intended lathe work. Verify your tool post accepts this exact shank size before ordering.