RK 3220 HEAVY DUTY GRINDER RK 3220 Heavy Duty Grinder RK 3220 Heavy Duty Grinder Manufacturer Home / RK 3220 Heavy Duty Grinder RK Pneumatics is one of the prominent 3220 HEAVY DUTY GRINDER Manufacturers in Kolkata, West Bengal Specification: Model Free Speed rpm Spindle Thread Size Wheel Capacity 0 x width mm Approx Weight with Guard kgs Length upto Guard End mm Air Inlet NPTF inch RK-3220-S-5800 5800 M16 150×25 7.4 550 RC1/2”