A MILLWRIGHT AND CO-WORKERS WERE ADJUSTING CRUSHING CAVITY SIZE ON A CONE CRUSHER.A PIN THEY WERE INSTALLING WAS TOO TIGHT, SO THEY REMOVED IT WITH A DRIFT AND SLEDGEHAMMER. INJURED TRIED TO C ATCH THE PIN AS IT WAS DRIVEN OUT. IT STRUCK HISHAND, CATCHING HIS FINGER BETWEEN PIN AND ADJUSTMENT CAP COLLAR. THREE SUTURES REQUIRED FOR WOUND.