Product Parameters
| Item | Specification |
|---|---|
| Step Count | 2–10 per shaft |
| Material | 12L14 Free-Machining Steel, 1018 Cold-Rolled, 416 Stainless |
| Tolerance | ±0.005 mm on critical diameters |
| Flange Options | SAE, NEMA, custom |
| MOQ | 10 pcs |
description
Multi-stepped motor shafts integrate multiple journal diameters, flange faces, and threaded sections into one component - designed for direct coupling to driven equipment without adapters that add cost and introduce misalignment. Each step is CNC turned and ground to exact tolerances for press-fits, bearing seats, and seal surfaces. The step configuration allows multiple bearings at different positions, with housing shoulders precisely locating each race for proper preload. This directly affects vibration levels and bearing life - a well-designed shaft runs quieter and lasts longer.
Why Bearing Preload on a Multi-Step Shaft Is Not Optional
If the bearing at the drive end is not preloaded, it floats on the shaft. Thermal expansion during operation can take up the slack and cause the bearing to walk off its seat. For a motor shaft driving a pump or gearbox, bearing preload at the motor drive end is what holds everything in place. We machine shoulder heights to the bearing manufacturer's specified preload dimensions.
FAQ
Q1: MOQ?
A1: 10 pieces.
Q2: Steps per shaft?
A2: 2–10 typically. Custom configurations welcome.
Q3: Heat treatment in-house?
A3: Yes - through-hardening, case-hardening, stress relief.
Q4: Surface treatments?
A4: Zinc-nickel, electroless nickel, black oxide, passivation.
Q5: Samples?
A5: Free samples. Lead time 5–7 working days.
Q6: Flange standards?
A6: SAE, NEMA, and custom. We machine to your drawing.
Quality is non-negotiable in precision manufacturing. Every component undergoes rigorous inspection at each stage of production.
- ISO 9001:2015- Quality management system covering design and manufacturing
- API 6D / API 600- Design and testing compliance for valve components and flanges
- Hydrostatic Pressure Testing- Every valve body pressure-tested to 1.5× rated pressure
- MPI / LPI- Magnetic particle and liquid penetrant inspection for weld integrity
- CE / ATEX- Pressure equipment directive compliance for EU market available
- CMM Inspection- Coordinate measuring for complex geometries and tight tolerances
- Surface Roughness Measurement- Ra, Rz, and Rt charting with every inspection report
- Passivation / Electropolishing- ASTM A967 procedures for corrosion resistance
- Material Traceability- Heat number tracking from raw material to finished part
From raw material to finished product, every step is controlled and documented:
- Material Preparation - CNC turning/milling to near-net shape
- Heat Treatment - Through-hardening or case-hardening for strength-critical parts
- Surface Preparation - Degreasing, acid cleaning, and surface activation
- Electroplating - Controlled bath process with thickness monitoring
- Sealing / Baking - Chrome sealing, anodize sealing, or hydrogen embrittlement relief baking
- Inspection - Coating thickness measurement, adhesion testing, and visual check
- Packaging - Protective interleaving, VCI packaging, and anti-tarnish wrapping
Hot Tags: multi-stepped motor shafts, China multi-stepped motor shafts manufacturers, Ground Shafts, Internal Hollow Shafts, Internal Spline Shafts, Keyed Shafts, Keyway Shafts, Variable Diameter Shafts