Precision Machined Planetary Carrier

In a planetary reducer, the planetary carrier is the core structural component-it supports multiple planet gears, allowing them to both rotate on their own axes and revolve, while transmitting power output. The precision of the planetary carrier directly determines the noise, efficiency, and lifespan of the entire reducer: inaccurate planet pin hole position causes eccentric loading and noise on planet gears; insufficient concentricity causes output runout and vibration. We make Precision machined planetary carriers to achieve micron-level precision for this reducer backbone, making the entire gear train rotate smoothly and quietly.

We use 42CrMo, 40Cr forged steel, or QT600-3 ductile iron as the base material. Forgings or castings first undergo normalizing or quenching/tempering to relieve internal stress and stabilize structure. Then machining centers and CNC lathes complete planet pin holes, center bores, and end faces in a single setup. Planet pin hole position accuracy within 0.02mm, concentricity within 0.01mm, end face runout within 0.01mm. Pin holes can reach H7 grade precision, surface roughness below Ra1.6μm; nitriding or induction hardening available for improved wear resistance as needed. Precision machined planetary carriers are used in industrial reducers, wind turbine gearboxes, construction machinery travel mechanisms, and planetary reducers in automation equipment. Every carrier undergoes CMM full dimensional inspection before shipping, with critical hole positions 100% inspected. Material reports and flaw detection reports can be provided. Years of precision transmission parts manufacturing, stable process. After years of making Precision machined planetary carriers, we have found that carrier precision directly determines the noise of the entire reducer-that is why critical hole positions are 100% inspected, no cutting corners. Send us drawings or 3D models; process evaluation first.

● Industrial reducers, planetary reducers

● Wind turbine gearboxes

● Construction machinery travel mechanisms

● Automation equipment, robot joints

Customization from drawings, samples, and 3D models supported. Planet gear count, pin hole pitch circle diameter, center bore dimensions, end face structure all adjustable per drawing, no strict MOQ. Materials: 42CrMo, 40Cr forged steel or QT600-3 ductile iron. Pin holes to H7 grade; nitriding or induction hardening for wear resistance as needed. Reducer noise and efficiency optimization supported-pin hole position accuracy improved per requirement. Custom samples 15–20 working days. Sample fee fully deductible against bulk orders. Process evaluation first, then sampling.

Full-process control under IATF 16949. Materials with material certificates. Forgings or castings: non-destructive testing (ultrasonic or magnetic particle) for internal shrinkage and cracks. After machining: CMM full dimensional inspection-planet pin hole position within 0.02mm, concentricity within 0.01mm, end face runout within 0.01mm. Critical hole positions 100% inspected; hardness sampled. Third-party inspection per customer specification supported, reports accompany goods.

Established in 2009, making precision metal parts in Yuhuan, Taizhou. Workshop with machining centers, CNC lathes, grinders, heat treatment equipment-from blank forging or casting, normalizing/quenching-tempering, machining to surface treatment, all in one line. Plant over 5,000 sqm, 60+ employees, 100+ CNC machines. Monthly capacity 10,000–60,000 pieces depending on complexity; equipment sufficient. Years of precision transmission parts manufacturing, supplied planetary carrier parts to OEMs, stable process, no reliance on subcontractors, delivery and quality self-controlled.

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