EMPLOYEE STATED HE WAS POSITIONING OIL BATH AND GUARD ON ROTARY BREAKER DRIVE CHAIN AND WAS RESTING HIS HAND ON A PIECE OF ANGLE IRON, WHEN THE CHAIN STRUCK THE GUARD, THROWING IT UPWARD AND C ATCHING HIS HAND BETWEEN THE GUARD AND ANGLE IRON. THIS RESULTED IN A FRACTURE AND LACERATION TO HIS FINGER.