The RIKON Oscillating Spindle Sander 50-320 is a specialized sander for the fast and accurate sanding of curved board edges and the inside surfaces of bored holes in projects. 4-1/2" Tall abrasive sleeves mounted on the machine's spindle oscillate up-and-down 5/8", 58 time per minute. This oscillation while the spindle spins, provides more efficient abrasive cutting action. Metal table is fixed, non-tilting, so the motor driven spindle is always 90 degrees to the table. Powerful 1/2 HP, 120 Volt, 4 Amp, 10,000 RPM motor drives the spindle at 2,000RPMs. Sander includes 6 spindle diameters (1/2" - 3"), 6 abrasive sleeves and 6 table inserts to make this a valuable machine for every shop. Weighs 20 lbs.Features: 1/2 HP motor provides great power for sanding. Motor is 120V, 4 amp and operates at 10,000 RPMs with reduction gearing to operate the sanding spindle at 2,000 RPMs for best sanding action. Metal table measures 12" x 12-5/8" and is fixed, non-tilting, so the spindle is always at 90 degress to the table for reliable edge sanding of board edges. Includes 6 spindle diameters - 1/2", 3/4", 1", 1-1/2", 2" and 3" for abrasive sleeves. Each sleeve is 4-1/2" long. Spindles oscillate up-and-down 5/8", 58 times per minute for efficient abrasive cutting action. Includes a standard 38mm (1-5/16" I.D. or 1-1/ 2" O.D.) dust port for use with dust collectors. On/Off switch has removable safety tab for extra security against unauthorized use. Specifications: Motor Horsepower: 1/2 HP Motor Amps: 4 A Motor Volts: 110V, 60 Hz Speed: 2,000 RPM Table Size: 12-5/8” x 12” Spindle Length: 4-1/2” Spindle Diameters: 1/2”, 3/4”, 1”, 1-1/2”, 2”, 3" Dust Outlet: 1-1/2” O.D or 1-5/16” ID Height (overall): 23-1/2" Width: 13-3/8” Depth: 14” Base Size (LxW): 12-3/8” x 14” Net Weight: 20 lbs. Warranty: 5 Years What's Included Multiple Inserts Multiple Spindles 5 Year Warranty