Radial Arm Granite Surface Polishing Machines by JM Machine Co. are US made granite and marble polishing machines designed to work with granite polishing wheels up to 18" in diameter. These machines are intended for grinding and polishing granite countertop slabs, granite or marble monuments, or other stone polishing operations. The polisher has totally enclosed Timken and pillow block bearings for long life and ease of use. Main drive motors are 2.5-5 hp, 2-speed motor. The polishing head can accommodate grinding wheels of up to 18" in diameter and 6' reach (longer upon request)for a 5' x 10' coverage and a vertical lift capability of 4 feet and is powered by a 3/4 hp motor. The suspension post swivels and could be utilized in a 180 or 360 degree circle work zone depending on its location and upper suspension post support mount. Spindle RPM is 300/600 RPM and can be easily modified via different pulley diameters to accomadate diffrent diameter polishing wheels and materials to be polished. Suspension Post: 1.Construction of 4" wide flange beam. 2.Bottom bearing ñ heavy duty Timken roller bearing ñ totally enclosed in housing. 3.Top bearing is a 1 15/16" pillow block bearing. Suspension Arm: 1. Constructed of 4" x 4" W.F. beam and 3" channel. 2.2 7/16" front and back beam rollers 3.æ HP gear reduction motor to raise and lower manual drum switch. 4.Approximately 3ft. to 4ft. of raise and lower. Suspension Rail: 1.Constructed of 5" channel 2.1 7/16" main shaft. 3.Weight adjustment for increasing pressure on grinding wheel powered by 1/3 HP gear reduction motor. (Manually operated by drum switch. Main drive motor: 2 speed motor 2 1/2 HP ñ 5 HP. Note: Support beam to mount suspension post NOT INCLUDED. Electrical: All motors to run on 230 volts 3 phase. Prints and installation instructions will be sent for easy installation. Machine can be installed in approximately 4 hrs. Optiona: Rocker pin $150 Water Union: $200 JM Machine Co. granite polishing machines and radial arm polishers for granite monument design or countertop fabrication are one of the best investments you can make if you are in the granite monument or granite countertop fabrication business. Our polishers are proven to be long lasting, efficient and easy to use.
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