Bosch AG40-85P 4-1/2-Inch Angle Grinder
The Bosch model has epoxy coated motor windings to prevent electrical shorts in case dust and chips work their way into the motor housing. This one has an 8.5 amp motor running at 11,000 RPM, and has been designed to operate off of AC or DC; a nice feature for those working remotely with a welding rig allowing them to plug the grinder right into the rig and pull power from it. The paddle switch on this one also has a lock, and is a little harder to work with than the DeWalt but it is sealed to keep dust out of the switch. One nice feature they’ve built into the Bosch AG40-85P is the tool stops working when the brushes need replacement, preventing the possibility of damage. The guard is tool free and a spindle lock is provided. However, you do need to use a wrench to change the wheel.