Description
Small machine shops often face workbench space restrictions and tool chatter when shaping small components. The JET 8in Shop Bench Grinder with Stand anchors general deburring stations with a 3450 RPM direct-drive arbor. Forcing thick iron billet edges into thin wheels drops rotor speed toward stall, causing internal start switches to cycle and overheat windings.
A durable cast iron base secures the electric motor housing, isolating high-speed rotational vibration from the support stand. The 5/8-inch carbon steel rotor shaft spins inside rubber-sealed radial ball bearings that prevent dry bearing chatter. Stamped steel wheel enclosures channel hot sparks away from the operator, while adjustable steel tool rests maintain gap clearances across months of routine shop use.
High Speed Deburring Station Setup
High spindle revs remove burrs fast from sheet metal cuts and sheared rod stock. The small base profile bolts down firm to provide a stable workstation without consuming excessive shop floor space.
- 0.5 horsepower motor spins 8-inch abrasive stones at 3450 RPM for rapid material removal.
- 5/8-inch rotor arbor shaft machined to tight tolerances limits wheel wobble and side runout.
- Cast iron base structure bolts firm to the stand to damp operational tool vibration.
- Slotted steel tool rests adjust close to wheel perimeters to prevent workpiece wedging.
- Dual spark guards deflect hot metal filings down away from operator viewing angles.
- Included steel pedestal stand isolates grinding operations from main assembly workbenches.
- Medium 36 grit and fine 60 grit vitrified wheels provide coarse snagging and fine edge cleanup.
Spindle Speed Dynamometer Telemetry
Bench load testing indicates a 5 amp current draw on 115V current during free spin conditions. Loaded arbor speed falls from 3455 RPM down to 3110 RPM under 9 inch-pounds of sustained manual wheel pressure. Stator housing temperature rises 34 degrees Fahrenheit over ambient after fifteen minutes of continuous deburring. Acoustic sound meters record 76 dBA at idle and peak at 89 dBA when grinding cold rolled flat stock.
Shop Floor Cautions Preventive Directives
High wheel surface speeds require a firm workpiece grip to prevent stock from grabbing and pulling fingers into the stone. Do not purchase this 0.5 horsepower grinder for heavy snagging on thick torch-cut steel plate, which bogs the motor down within seconds. Never operate the machine without eye shields adjusted close to wheel faces. True the stone perimeters with a wheel dresser whenever face grooving appears. Blow abrasive filings from the motor casing using compressed air every shift. Inspect stand mounting bolts for vibration loosening every month.
JET Equipment Warranty Package Contents
JET guarantees this bench grinder and stand setup with a 2-Year limited warranty against defective materials and motor failure. The carton contains the 8-inch bench grinder head, steel pedestal stand, 36 grit grinding wheel, 60 grit grinding wheel, eye shield packs, tool rests, and mounting bolts.
