Our Advantage of gear box (gear reducer): 1. Steel Grade: gear shaft and pinion gear by Forged SNCM220 (AISI 8620, DIN17CrNiMo6) big Gear by SCM415 (AISI 4115, DIN 20CrMo5), made in Japan. Carburization HRC 58-61.2. Gear grinding precision at class JIS 0~2.3. All Bearing: SKF Sweden (To be selected precisely-calculated radial and axial thrust and loads.)4. All Seal location with hard-chrome plating which surface roughness Ra 0.2 and grinding before and after hard-chrome plated..5. All seal: NOK Japan6. Casing: FC257. Cooling: built-in cooling filter system and plate type heat-exchanger.8. Forced lubrication for all of bearings.9. In-house test and inspection: noise below 85 dB and vibration less than 2 mm/ sec.