This small but mighty 3” Grinder with Rotary Shaft is great for many applications from grinding to engraving this machine is truly versatile. The rotary shaft allows for great flexibility making it ideal for intricate detailed work polishing or grinding in tight spaces. The grinding and buffing wheels are great for sharpening cutting tools, rough shape material and buffing of your workpieces. CX904 machine uses 1/2” bore. Electrical: Power Requirement:120V, Single-Phase, 60 Hz Full-Load Current Rating: 0.4A Minimum Circuit Size: 15A Connection Type: Cord & Plug Power Cord Included: Yes Power Cord Length: 6-1/2 ft. Plug Included: Yes Included Plug Type: 5-15 Switch Type: Toggle ON/OFF Switch Motors Main Type: Induction Horsepower: 1/4 HP Phase: Single-Phase Amps: 0.4A Speed: 3450 RPM Power Transfer: Direct Drive Bearings: Shielded & Permanently Lubricated Main Specifications: Operation Info Right Wheel Type: Aluminum Oxide Left Wheel Type: Wool Wheel Bore: 1/2 in. Wheel Speed at Maximum Wheel Diameter: 3450 RPM Rotary Shaft Collect Holds 1/8” Diameter Bits Construction: Base: Aluminum Work Rest: Steel Eye Shields: Polycarbonate Foot Print: Product Dimensions: Weight:2.7 Kg (5 lbs.) Width (side-to-side) x Depth (front-to-back) x Height: 6-3/4 x 5-1/4 x 6-1/4 in. Footprint (Length x Width): 3-1/4 x 3-1/4 in. Shipping Dimensions: Box Type: Cardboard Machine Weight: 2.72 Kg (6 lbs.) Length x Width x Height: 10 x 8 x 7 in.