Reducer Output Shaft Processing

This output shaft transmits torque from the reducer to your load. Reducer output shaft processing requires strong materials. We use 7075-T6 aluminum or 40Cr alloy steel. 7075-T6 has a tensile strength above 570 MPa, while 40Cr steel is tempered to 28–32 HRC hardness. Journal roundness is ≤0.003 mm, coaxiality is ≤ φ0.008 mm, and surface roughness is Ra 0.2–0.4 μm. The tolerance grade is IT5 (ISO 286-8). This high-precision part withstands both bending and torsional stresses simultaneously.

For 7075 aluminum, yield strength exceeds 500 MPa. Aluminum shafts provide 60–70% of the torque capacity of steel but weigh 50% less, making them ideal for drones and robots. For 40Cr steel, torque capacity is higher, making it suitable for heavy machinery. Bearing holes are machined to h5 or j6 grade, with a fit gap of 0–0.008 mm. After bearing installation, radial runout remains below 0.005 mm, ensuring smooth rotation.

Every output shaft undergoes a dynamic balance test according to ISO 1940 G2.5, with residual unbalance below 0.5 g·mm per kg. Hardness is verified using a Rockwell tester for each piece. Spline teeth are inspected with a gear measurement center, maintaining cumulative pitch error within 0.015 mm. Shaft journal fillets are R0.5–R1 mm to reduce stress concentration. Fatigue life exceeds 10⁷ cycles under ISO 1143 testing. Before production, we confirm your requirements and technical plan, then provide a quote and finalize the contract.

This shaft is suitable for planetary reducers, harmonic drive wave generators, industrial robot J4 and J5 axis shafts, and AGV drive shafts. During production, we provide progress photos and videos so you always know the status of your order.

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