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Pneumatic grinders run on compressed air for grinding, deburring, cutting, porting and finishing metal. They are lighter than electric grinders of similar size and handle long, continuous use, so shipyards, fabrication shops, foundries, mold makers and auto shops rely on them.
How to choose a pneumatic grinder
- Type: angle grinders (2" to 7") take discs for grinding and cutting. Die grinders hold 6mm burrs and mounted stones for detail work. Straight grinders (3" to 6") grind along castings, pipes and welds.
- Throttle: lever throttles (Toku TAG-40SAL, TAG-700QJL) are easy to feather and release. Roll throttles (Toku TAG-40SA, TAG-700) let you hold a steady speed.
- Exhaust direction: front exhaust die grinders (Toku MG-7204B) blow chips off the work, while rear exhaust models (Toku MG-7206B) keep air away from the workpiece.
- Air supply: grinders use a lot of air. Check the air consumption on the product page and make sure your compressor can keep up.
- Kits: die grinder kits (OSK GAD14KIT, Lota ZX-2206K, S-Ks PA-3201KGN) come with accessories to get started. Check what each kit includes.
Popular pneumatic grinders at KHM Megatools
| Model | Type | Good for |
|---|---|---|
| Toku TAG-40SA / TAG-40SAL | 4" angle grinder | Grinding welds and general shop work |
| Toku TAG-700 / TAG-700QJL | 7" angle grinder | Heavy grinding on plate and castings |
| Nitto Kohki MLG-40 / MAGW-40 | Myton angle grinder | Compact industrial grinding |
| Toku MG-7204B / MG-7206B | 6mm die grinder | Deburring and detail grinding |
| Toku TSG-5S / TSG-6S | Straight grinder | Castings, pipes and welds |
| Lota CT-661K / 061-0023 | Micro die grinder | Mold work and fine finishing |
| OSK GPA-4110 / S-Ks AGD-90 | 4" angle grinder | Workshops on a budget |
Air or electric grinder?
Air grinders stay cool and light over a full shift, but they need a large air compressor and air hose. For occasional use, an electric angle grinder or die grinder is simpler. Fit your die grinder with mounted stones and carbide burrs.
All products from KHM Megatools are genuine and covered by the manufacturer's warranty where applicable.
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