Class Code: 3638

Per NCCI's Scopes Code Description:

Code 3638 is applied to insureds engaged in the manufacture of ball or roller bearings which are used in a variety of rotating equipment, devices and parts. Steel rods, received from others, are fed into a furnace which feeds the white-hot steel into a heading machine where shears cut it into short cylinders. These are shaped into rough spheres by a pair of dies and the rough balls are ejected. After cooling, they are ground, heat-treated, quenched in an oil bath and then tested for strength using a hydraulic ram. Each ball receives a drop of oil before being individually packaged to exclude dust. Some balls are shipped to customers while others will be assembled into roller bearings. Forged rings, received from others, are machined, ground and polished with exacting care to form an inner and outer ring with precisely ground grooves which will act as raceways for the balls. A separator or cage is press-formed to fit around the balls to prevent bunching up as they ride the raceway. The parts are inspected and assembled prior to shipment.

Rate per $100. of Renumeration: $ 1.39

Construction Exemption Required: No