EE WAS REMOVING A BOLT AND NUT THAT WAS HOLDING A DRIVE ROLLER IN PLACE AND THE BEARING BLOCK SPUN AROUND AND CAUGHT HIS FINGER BETWEEN THE BEARING AND THE FRAME. A COME-A-LONG HAD TENSION ON ROLLER. CAUSE OF INJURY WAS AWARENESS & NOT WEARING PROPER GLOVES. COMPLIANCE WITH RULES/REGS. WAS A FACTOR, PROTECTIVE EQUIP. A FACTOR, MINING EQUIP/SYSTEMS A FACTOR, MINER PROFIC. A FACT