... . It is designed according to the specification in code ZBJ19009-88, featured with high-strength alloy steels for gear wheel and ... carburation, quenching and gear grinding. Gear wheel precision is GB10095-88, class 6. Tooth surface hardness is HRC54-62. A thrust ... assemblage mode respectivelyExample of earmark: ZLYJ 225-- 12.5 -- (,)ZLYJ series 133, 146, 173, 200, 225, 250, 280, 315, 330 are ...