English 
中文简体 
CNC Drive Components & Magnetic Yokes: Precision Manufacturing for Dynamic Balance
At Xierge Precision Machinery Co., Ltd., we specialize in manufacturing high-precision CNC Drive Components & Magnetic Yokes that demand exceptional dynamic balance, extreme concentricity, and superior fatigue resistance. Established in 1990, our 30+ years of operational experience in the precision hardware industry have honed our ability to produce critical drive components for automotive electric motors, high-speed spindle motors, and industrial machinery.
CNC Drive Components & Magnetic Yokes operate under rigorous conditions, where even a micron-level deviation in coaxiality can lead to excessive vibration, noise, and premature bearing failure. To counter this, we utilize Japanese imported Star CNC Swiss-type lathes. The guide bushing technology on these machines provides continuous support to the bar stock, allowing us to machine long, slender shaft geometries with high length-to-diameter ratios while completely eliminating deflection. Additionally, our advanced machining centers and precision cylindrical grinders ensure that all bearing journals and commutator seats achieve ultra-tight micro-tolerances.
Following our principle of "Integrity Oriented, Quality Foremost," we adopt premium raw materials such as 42CrMo, SUS440C, and SUJ2 bearing steel, applying strict heat treatment to achieve optimal hardness and toughness. Every motor shaft undergoes rigorous quality inspection utilizing our complete set of testing instruments imported from Japan and Germany. We keep innovating to maintain sound business development and warmly welcome domestic and overseas clients to visit our factory and explore OEM/ODM cooperation opportunities.
CNC Drive Components & Magnetic Yokes Technical Specifications
| Shaft Types | Rotor Shafts, Armature Shafts, Spindle Shafts, Commutator Shafts |
|---|---|
| Primary Equipment | Star CNC Swiss-type Lathes, CNC Machining Centers, Precision Cylindrical Grinders |
| Diameter Tolerance | Bearing Journals: ±0.002mm; General Diameters: ±0.005mm |
| Geometric Tolerances | Concentricity/Coaxiality: 0.003mm; Cylindricity: 0.002mm; Straightness: 0.005mm/100mm |
| Common Materials | SUJ2 (Bearing Steel), 42CrMo, 40Cr, SUS440C, SUS304, Silicon Steel |
| Hardness & Heat Treatment | Induction Hardening, Quenching & Tempering; Hardness up to HRC 55-62 on journals |
| Surface Roughness (Ra) | Ground Bearing Journals: Ra 0.2 - Ra 0.4; Turned Surfaces: Ra 0.8 |
| Machining Features | Cross-drilled Holes, Keyways, Relieve Grooves, Micro-threads, Custom Tapers |
| Inspection Equipment | Japanese/German CMM, Roundness Testers, Hardness Testers, Dynamic Balancing Testers |
Core Advantages of Xierge CNC Drive Components & Magnetic Yokes
- Zero-Deflection Swiss Machining: Our Japanese Star CNC Swiss-type lathes provide continuous guide bushing support, enabling the machining of long, slender motor shafts without bending, ensuring exceptional straightness.
- Ultra-Tight Coaxiality for Dynamic Balance: By completing complex geometries in a single setup, we achieve concentricity tolerances within 0.003mm, which is critical for minimizing high-speed vibration and noise.
- Advanced Precision Grinding: Equipped with high-precision cylindrical grinders, we achieve mirror-like finishes (Ra 0.2) on bearing journals, extending bearing lifespan and reducing friction heat.
- Premium High-Torque Materials: We strictly select SUJ2 and 42CrMo alloy steels, applying controlled induction hardening to provide a wear-resistant surface (HRC 58+) while maintaining a tough, fracture-resistant core.
- Complex Multi-Axis Machining: Live tooling on our machining centers allows for the seamless integration of cross-holes, keyways, and tapers without secondary clamping errors.
- World-Class Metrology Assurance: Utilizing imported German and Japanese testing instruments, including roundness testers and CMMs, we verify 100% of critical dimensions on high-speed shaft batches.
- 3-Decade OEM/ODM Expertise: Since 1990, we have continuously innovated, offering DFM (Design for Manufacturing) optimization to reduce costs and seamlessly scale from prototyping to mass production.
Payment Methods & Global Logistics Solutions
Secure International Payment Terms:
To support our global B2B clients, we offer flexible and secure payment options. For mass production orders of CNC Drive Components & Magnetic Yokes, we typically accept T/T (Telegraphic Transfer) with a 30% advance deposit and 70% balance before shipment. For large-scale automotive or industrial supply contracts, we are fully capable of processing Irrevocable Letters of Credit (L/C) at sight. For initial prototyping, sample orders, or custom tooling fees, PayPal and Western Union are available for your convenience.
Global Logistics & Protective Packaging:
We offer comprehensive shipping solutions under FOB, CIF, and DAP Incoterms. For urgent prototypes or small batches, we utilize expedited international couriers such as DHL, FedEx, and UPS. For bulk mass production, we provide highly competitive sea freight (LCL/FCL) and air cargo rates through our trusted forwarder network. Recognizing that motor shafts are precision components with delicate bearing surfaces highly susceptible to bending and oxidation, we utilize specialized packaging: each shaft is individually wrapped in VCI (Volatile Corrosion Inhibitor) anti-rust paper, secured in custom rigid cardboard tubes or EPE foam slots to prevent contact, and packed in sturdy export-grade wooden pallets to ensure zero deformation during transit.
FAQ
Dynamic balance is critical at high RPMs. We ensure this by strictly controlling coaxiality and concentricity during the initial Swiss-type turning process, achieving tolerances within 0.003mm. For specific high-speed applications, we can coordinate dynamic balancing testing and material removal (drilling) to meet exact G-class balance standards prior to final assembly.
For SUJ2 shafts, we employ a two-stage process. First, we perform rough turning on the Swiss lathe, leaving a specific grinding allowance. After induction hardening (up to HRC 60), we utilize our precision CNC cylindrical grinders to remove the allowance. This ensures the final bearing journals meet strict micro-tolerances and achieve a flawless Ra 0.2 surface finish without tool chatter.
Yes. Our Star CNC Swiss-type lathes are equipped with live tooling and Y-axis capabilities. This allows us to perform radial drilling, milling of flats, and cutting keyways directly on the machine in a single setup. Because the part is not transferred to secondary machines, we maintain perfect concentricity between the bearing journals and the machined features.
To manage residual stress in long motor shafts, we optimize cutting parameters and utilize sharp tooling to reduce heat generation. For highly critical applications, we can incorporate a stress-relief annealing process between rough and finish machining. This stabilizes the material structure, preventing long-term warping during high-speed operation.
Absolutely. Our quality control lab is equipped with imported Japanese and German roundness testers and Coordinate Measuring Machines (CMM). We can precisely map and verify cylindricity, straightness, and concentricity across multiple bearing seats, providing detailed inspection reports with every batch.
Residual chips can destroy motor bearings. After machining and deburring, all shafts pass through our dedicated industrial ultrasonic cleaning machines. This process uses high-frequency agitation and specialized flushing fluids to remove all micro-burrs and cutting fluids from deep cross-holes and threads. They are then immediately oiled and vacuum-sealed.
