Series 847 bits can be converted to series 846 bits by changing thebearing to 1/2. Important: always assemble the black bearing heatshield with the raised side up when changing the bearing. Improperassembly will cause the screw to come loose and the bearing to fallwhen working.
Spare Parts:
791.002.00 Bearing 3/8
990.057.00 Screw for Bearing 1/8W X 1/4"
990.423.00 Shield for Bearing - I.D. 7mm x O.D. 12mm