Job Description:

• 1) Drills holes in ore or rock in mine or quarry to facilitate blasting and quarrying, using jackhammer: Connects steam or compressed-air and water lines to hammer.

• 2) Inserts drill in chuck, trips trigger to start hammer, and leans on hammer to force drill into solid mass.

• 3) Changes drill or adds lengths as depth of hole increases.

• 4) Replaces or sharpens bits.

• 5) Lubricates hammer.

• 6) May lay steam, compressed-air, or water pipelines.

• 7) May be designated according to type of drill operated as Tripod-Drill Operator.