Bonmach is one of the leader manufacturer of threaded rock drill button bit in China. We produce high quality threaded rock drill bits by advanced technics. Also, we could customized the top hammer rock drill button bit, threaded shank rock drill bit upon request.
Bonmach’s Top hammer rock drill button bits include General, Retract and Reaming series. We use carbide button material GF20G, GF20B which hardness: 90.3HRA-90.4HRA, and finish forged steel NO.45CrNiMoV with hardness: 45HRC as steel body, adopt hot fitted technology for all our products. Bonmach’s threaded button bits have the performance of stronger button-fixing ability, better ware-resistance, and impact-resistance long service life.