DIY 250W Wet & Dry Bench Grinder DIY 250W Wet & Dry Bench Grinder £59.95 Out of stock. DIY 250W Wet & Dry Bench Grinder Bench-mounted combined 150mm grinder and low-geared 22:1 200mm whetstone polishing wheel with water trough. Durable cast aluminium body and long-life induction motor with sealed bearings. Dust-protected sealed switch and rubber-coated mounting feet. Suitable for general grinding and polishing metal, stone cutting / shaping and particularly for sharpening blades and final polishing. Water acts as coolant and lubricant to prevent structural damage to metal and assists polishing to a mirror finish. No load speed: 2950rpm (grinder), 134rpm (whetstone). Supplied with fine grit grinding wheel, whetstone wheel, tool rest, spark arrestor, eye guard and water trough. recommended to use safety googles with this product. see our safety tools section.