EE WAS ATTEMPTING TO CLOSE THE DOOR ON THE DRILLTEC D40K QUARRY DRILL FROM INSIDE THE CAB WHEN HIS LEFT MIDDLE FINGER GOT SMASHED IN THE DOOR. CO-WORKER WAS OUTSIDE THE DRILL AND PUSHED THE DO OR SHUT. INJURED DID NOT REALIZE THAT HE WAS GOING TO HELP HIM CLOSE THE DOOR AND HAD HIS HAND PLACED IMPROPERLY ON THE DOOR FRAME. THE DOOR ON THE DRILL IS DIFFICULT TO CLOSE.