Shandong hengji Planetary Spur Gear for Excavators

This heavy-duty planetary spur gear is a core transmission spare part for excavator wheel-side reducers, independently produced by Shandong Hengji Group Co., Ltd., a national specialized new giant enterprise with full industrial chains including forging, heat treatment and precision machining.

We select premium 42CrMo alloy forged steel as raw material. Integral forging eliminates internal defects such as pores and cracks, delivering much stronger load-bearing capacity and impact toughness than ordinary carbon steel gears. The whole manufacturing flow strictly follows international standards: CNC rough turning, precision hobbing, carburizing quenching, low-temperature tempering, Class 6 gear grinding, inner hole fine honing and magnetic particle non-destructive testing. After heat treatment, the tooth surface hardness reaches HRC 58-62, while the gear core retains sufficient toughness to avoid tooth breakage and surface pitting under long-time heavy excavation loads.

The Class 6 precision grinding process greatly optimizes tooth profile accuracy, reducing transmission vibration and running noise by nearly 30% compared with ordinary aftermarket gears. Under harsh mining and earthmoving conditions, its service life is improved by 45%, effectively cutting clients’ equipment downtime and maintenance expenses. All production procedures are completed in our own workshops without outsourcing, which ensures consistent quality control and stable delivery cycles for mass OEM orders.

Our planetary gears fit most mainstream excavator wheel reduction systems and small loaders. All finished products pass full dimensional inspection and obtain CE export certification, supported by a 12-month quality warranty. Besides standard models, we offer customized gear processing based on customers’ drawings or samples for special module and tooth count demands.

We have long-term cooperative relations with domestic top construction machinery manufacturers. Our gear products are exported in bulk to Saudi Arabia, South Africa, Kenya, Algeria, Russia and Southeast Asian markets. Overseas buyers recognize our products for stable quality, competitive factory FOB prices and flexible minimum order quantity. Our professional engineering team provides timely technical support and after-sales service for all global partners.