DeWalt Rotary Hammer Drill Metal SA Crank Shaft DCH143 DCH243 DCH253 DCH254 DCH273 DCH274 DCH363 DCH364

DeWalt Rotary Hammer Drill  Metal SA Crank Shaft DCH143 DCH243 DCH253 DCH254 DCH273 DCH274 DCH363 DCH364

The crankshaft helps drive the piston which gives the hammer dill the pounding action that is needed, you would need to replace this when the part gets damaged.

Please see below applicable models