Deunydd crai y peli dur yw'r wifren ddur.
Proses gweithgynhyrchu peli dur fel a ganlyn:
Cold Heading: In the first step, heading machines cut wire into short lengths and form it into spherical shapes between dies.
Deflashing: Mae'r llinell fflach, crib a adawyd gan y marw sy'n ffurfio, yn cael ei dynnu wrth i beli rolio rhwng platiau haearn bwrw trwm.
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.
