What size air compressor do I need for the Sempo grinder?

A unit delivering 6–8 cfm at 90 psi will keep the grinder at full speed for continuous grinding.

Can it run 7-inch flap discs as well as grinding wheels?

Yes. Any 7-in. / 5⁄8-11 arbor disc rated 8 500 RPM or higher—flap, cutting, or grinding—fits perfectly.

Does the tool come with guard and spanner wrenches?

The box includes an adjustable spark guard, a side handle, and two pin-style spanner wrenches.

How loud is the grinder under load?

Approximately 92 dB. Always use appropriate hearing protection.

Will it accept a dust-extraction shroud?

Yes. The nose diameter matches most universal 7-inch shrouds; connect a 2-inch vac hose for dust-controlled grinding.

NEW on Amazon: Sempo 7-Inch Heavy-Duty Pneumatic Angle Grinder (7500 RPM)

Sempo 7-Inch Heavy-Duty Pneumatic Angle Grinder (7500 RPM)

Need to chew through welds, rust, or thick mill scale without killing your wrists or your budget?
Meet the Sempo 7-Inch Air Angle Grinder—fresh on Amazon and built like a brick lathe. With a free speed of 7 500 RPM and an industrial composite/steel body, it’s purpose-made for metal-fab pros, body-shop techs, and heavy-equipment maintenance crews who refuse to baby their tools.

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Key Takeaway

One grinder, five jobs—rapid stock removal, precise bevel grinding, stainless finishing, weld cleanup, and aggressive cutting—all powered by a rock-steady 90-psi air supply and a fatigue-saving 6.6-lb chassis.

Disclosure – This page contains Amazon affiliate links. If you buy through them, Tend Industrial Supplies earns a small commission at no extra cost to you.

Perfect For the Following Operations…

Weld prep & bead flattening on carbon or stainless plate
Automotive panel work—remove rust, paint, seam sealer fast
Fabrication shops that already pipe 90-psi air but need angle-grinder muscle
Timber-frame & heavy woodworking when a 4-½-in. just won’t reach
Structural steel crews finishing galvanized edges before bolting
Budget friendly, you dont need a $2000 Air angle grinder to operate, its not even worth it when you have Sempo

Common Questions, Answered

FAQ	Response
1. What size compressor do I need?	A unit delivering 6–8 cfm @ 90 psi keeps the grinder at full speed for continuous grinding sessions.
2. Can it run 7-in. flap discs or only grinding wheels?	Any 7-in./5⁄8-11 arbor wheel rated 8 500 RPM+ is fair game—grinding, cutting, or flap.
3. Does it include a guard and spanner wrenches?	Yes—adjustable spark guard, side handle, and twin pin-style spanners ship in the box.
4. How loud is it?	About 92 dB under load. Use rated ear protection just as you would with any industrial grinder.
5. Is it compatible with a dust-extraction shroud?	The nose diameter matches most universal 7-in. shrouds; add a 2-in. vac hose for OSHA-friendly grinding.