The motor is the middle portion of a bench grinder. The speed of the motor determines what type of work a bench grinder can perform. On average the speed of a bench grinder can be 3000-3600 rpm( revolutions per minute). The more the speed of the motor the faster you can get your work done.
The size, material, and texture of the grinding wheel determine a bench grinder’s function. A bench grinder usually has two different wheels- a coarse wheel, which is used for carrying out the heavy work, and a fine wheel, used for polishing or shining. The average diameter of a bench grinder is 6-8 inches.
Eyeshield and Wheel Guard
Eyeshield protects your eyes from flyaway pieces of the object that you are sharpening. A wheel guard protects you from the sparks generated by friction and heat. 75% of the wheel should be covered by a wheel guard. You shouldn’t by any means run a bench grinder without a wheel guard.
Tool rest is a platform where you rest your tools when you are adjusting it. Consistency of pressure and direction is necessary while working with a bench grinder. This tool rest ensures a balanced state of pressure and good workmanship.