1 HP 8 in. Industrial Metalworking Bench Grinder, 115-Volt JBG-8A The JET 8 in. Industrial Bench Grinder is The JET 8 in. Industrial Bench Grinder is one of our most popular bench grinders with totally enclosed. The pre-lubricated ball bearings, cast iron wheel guards, dust vents, large eye shields, and adjustable tool rests.