Hráefnið í stálkúlunum er stálvírinn.
Aðferð við að framleiða stálkúlur sem hér segir:
Cold Heading: In the first step, heading machines cut wire into short lengths and form it into spherical shapes between dies.
Flassið: Flasslínan, hryggur sem myndastífurnar skilja eftir, er fjarlægður þegar kúlur rúlla á milli þungra steypujárnsplatna.
Grinding: Similar to deflashing, except that a grinding stone is used to improve precision.
Heat-treating: Carbon steel balls are next carburized and hardened. Heat treatment imparts the desired hardness and case depth.
Lapping: Several proprietary lapping processes can bring balls to the requirements of ISO9001
Polishing: Proprietary chemical and mechanical processes give the balls their final micro-smoothed finish, for increased wear resistance and product longevity.
Inspection: Bell Balls have strict inspection process, first will use proprietary, automated inspection processes for selecting balls, then using a smooth skateboard, then use worker select the balls one by one.
