... , 52400, 53200, 53300, 53400, 54200, 54300, 54400 series standard types and 511/500 512/500 510/500 593/500 ... 572/710 592/710 series non-standard series.2. Material: GCr153. Application: Oil drilling machines, screw shaft of oceangoing freighters, combining ... B. specifications1. Certification: ISO9001- 2008 Certificate of Origin3. High precision, long life, low noise, high-end technology, low vibration ...