The HD Switch Electric Motor Bearing Rebuild Kit is designed for high-RPM electric motors. These high-performance bearings are crafted specifically for electric motors, featuring grease that helps protect against arcing to ensure the smooth operation lasts. This kit was built for Sears Craftsman 137.xxxxxx Series 10"" Table Saws, compatible with motor models marked RM870, RM871, and RM872. Also compatible with Ryobi BTS10BS. This kit also includes the rubber bearing isolator cup designed to reduce noise and vibration in motorized equipment. This rubber isolator fits over the bearing before it is inserted into the motor housing, providing superior dampening compared to standard OEM parts. With a 34mm outer diameter and a 30mm inner diameter, it ensures a precise fit for enhanced motor protection and smoother operation. Engineered for longevity, it includes PTFE seal grease to further extend the life of the rubber cup, making it an essential upgrade for increased durability and quieter performance. 3509 / 820015: Ball bearing, 6202-2RS-10 (5/8"" ID, 35mm OD, 11mm wide). 83990291A1: Carbon brush pair (7x17x17mm). 0HX9 2001AH1010: Needle bearing, HK1010 (10x14x10mm). 2001LU6204: Ball bearing, 6204-2RSH-C3 (20x47x14mm). 0R1Y 87840122A2: Ball bearing, 6201RS (12x32x10mm). 0R1Y 87840122A2: Ball bearing, 6200ZZ (10x30x9mm). 0R1S 87840081: Rubber bearing isolator cup to reduce noise and vibration. This kit fits a wide range of Sears Craftsman 10"" table saw models with the ""137"" prefix, ensuring smooth motor operation and improved durability. Heavily inspect armature for indications of heat damage, cracks, or other damage that can be signs of more significant motor problems that may not be solved by replacing the bearings and carbon brushes. Carbon Brushes should slide all the way through the brush holder. Sandpaper can be used to achieve a perfect fit. Chamfered corners help ease assembly. Note: Carbon expands when heated, Allow room for Thermal Expansion.