The Makita 1-9/16" Rotary Hammer (model HR4002) has a powerful 10 AMP motor that delivers 2,500 BPM for the most demanding applications. The HR4002 includes a torque limiting clutch that is engineered to prevent gear damage by automatically disengaging gears if the bit binds. The "no hammering when idling" function helps increase tool life, and the soft grip handle provides increased comfort on the job.
The main use of rotary hammer drills is to frequently drill holes in the concrete. The Makita 1510W uses 1510W power and a no-load speed of 150-310 rpm. The Makita HR5202C comes with two new on/off switches that can be used in hammering mode. The rotary hammer drills are mainly used for heavy-duty drills such as drilling into mixed joint concrete, making holes into woods etc.