I was surprised to find out that the 1/2" Rohm chuck on my 2.5 year old 18V Bosch drill (just a drill, not a hammer drill) is not removable. It has no retainer screw, but does have a flat head "retainer" with a small round hole in the middle. The retainer may be threaded, or may be a press fit, I can't tell.
Looking at an exploded parts diagram for the drill, if you want a new chuck, you have to buy the entire front of the drill, including the gear set and housing, as one unit. Crazy. Why would Bosch do this? My other Bosch drill, a newer 12V version with 3/8" chuck, uses a Torx screw to retain the chuck.
Looking at an exploded parts diagram for the drill, if you want a new chuck, you have to buy the entire front of the drill, including the gear set and housing, as one unit. Crazy. Why would Bosch do this? My other Bosch drill, a newer 12V version with 3/8" chuck, uses a Torx screw to retain the chuck.