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High-Precision CNC Machined Gear Shafts for Critical Torque Transmission
At Xierge Precision Machinery Co., Ltd., we leverage over 30 years of operational experience since 1990 to manufacture premium CNC Precision Machined Gear Shafts for the automotive, industrial machinery, and home appliance sectors. Gear shafts are critical transmission elements that require extreme tooth profile accuracy, superior fatigue resistance, and perfect concentricity to transfer high torque seamlessly while minimizing vibration at high speeds. Even a microscopic deviation between the spline pitch circle and the bearing journals can lead to excessive wear, backlash, and premature system failure.
To achieve flawless results, our production facility is equipped with Japanese imported Star CNC Swiss-type lathes and advanced 4-axis CNC machining centers. This specialized equipment allows us to perform complex milling, hobbing, drilling, and threading operations in a single setup, ensuring absolute concentricity between the bearing seats and the gear sections. The guide bushing technology on our Swiss lathes provides continuous support, completely eliminating deflection when machining long, slender gear shafts.
Following our core principle of "Integrity Oriented, Quality Foremost," we strictly adopt premium raw materials, such as 20CrMnTi, 42CrMo, and SUS440C alloy steels, which are ideal for high-strength torque applications. We apply strict quality inspection protocols utilizing a complete set of testing instruments imported directly from Japan and Germany, verifying pitch deviation, tooth profile, and structural hardness. We keep innovating to maintain sound business development and warmly welcome domestic and overseas clients to visit our factory and explore custom OEM/ODM cooperation opportunities.
CNC Precision Machined Gear Shafts Technical Specifications
| Shaft Types | Transmission Gear Shafts, Pinion Shafts, Spline Shafts, Rotor Shafts with Integrated Gears |
|---|---|
| Primary Equipment | Star CNC Swiss-type Lathes, 4-axis CNC Machining Centers, Gear Hobbing & Grinding Machines |
| Spline / Gear Types | Involute Splines, Straight-sided Splines, Spur Gears, Helical Gears, Serration Splines |
| Module / Pitch | Module 0.5M to 5.0M; DP (Diametral Pitch) 5 to 48 |
| Dimensional & Geometric Tolerances | Bearing Journals: ±0.002mm; Concentricity: 0.003mm; True Position: 0.01mm |
| Common Materials | 20CrMnTi, 42CrMo, 40Cr, 1045 Carbon Steel, SUS440C, SUS303/304 |
| Heat Treatment | Carburizing & Quenching, Induction Hardening (HRC 55-62 on tooth surface) |
| Surface Roughness (Ra) | Hobbed Splines: Ra 0.8; Ground Splines & Bearing Journals: Ra 0.2 - Ra 0.4 |
| Inspection Equipment | German/Japanese Gear Measuring Centers, CMM, Roundness Testers, Hardness Testers |
Core Advantages of Xierge CNC Precision Machined Gear Shafts
- Single-Setup Multi-Axis Machining: Our Japanese Star CNC Swiss-type lathes with live tooling allow us to turn, hob splines, and drill cross-holes in one operation, maintaining extreme concentricity and eliminating secondary clamping errors.
- High-Torque Material Mastery: We have mature processing parameters for high-strength alloy steels like 20CrMnTi and 42CrMo, ensuring superior fatigue resistance and torque transmission capabilities for heavy-duty applications.
- Advanced Thermal Deformation Control: We meticulously manage heat treatment processes and utilize precision CNC cylindrical and spline grinding post-treatment to correct any micro-warping, restoring exact micro-tolerances.
- Zero-Backlash Spline Grinding: For critical applications, we offer precision spline grinding to achieve ultra-tight tooth profiles (Ra 0.2) and AGMA Q10+ precision, significantly reducing backlash and mechanical noise.
- Comprehensive Gear Metrology: Our quality lab is equipped with imported German and Japanese gear measuring centers to precisely verify pitch deviation, tooth alignment, and runout, ensuring perfect meshing with mating hubs.
- Ultrasonic Cleaning Standard: Every gear shaft passes through our dedicated industrial cleaning machines to remove all machining chips from the spline roots and cross-holes, guaranteeing a spotless surface ready for assembly.
- 3-Decade OEM/ODM Expertise: Since 1990, we have continuously innovated, collaborating closely with clients to optimize DFM (Design for Manufacturing) and seamlessly scale custom gear designs from rapid prototyping to mass production.
Payment Methods & Global Logistics Solutions
Secure International Payment Terms:
To facilitate smooth B2B international trade, we offer flexible and secure payment options. For mass production orders of CNC machined gear shafts, we accept standard 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 also available to expedite the process.
Global Logistics & Protective Packaging:
We provide comprehensive end-to-end 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 offer highly competitive sea freight (LCL/FCL) and air cargo rates through our trusted global forwarder network. Recognizing that gear shafts are precision components with delicate tooth profiles and long geometries 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 and tooth damage during transit.
FAQ
Thermal warping is a major challenge for long gear shafts. We use a two-stage process: rough machining and spline hobbing, leaving a specific grinding allowance, followed by controlled induction hardening or carburizing. Post-heat treatment, we utilize our precision CNC cylindrical and spline grinders to correct any micro-deformation, ensuring the final tooth profile and bearing journals meet strict micro-tolerances.
Yes. Our 4-axis CNC machining centers and Swiss-type lathes with live tooling are highly versatile. We can program custom cutters to machine different spline profiles, keyways, and threads on a single shaft in one continuous operation. This single-setup approach guarantees perfect concentricity across all transmission features.
For high-wear automotive applications, we can achieve a tooth surface hardness of HRC 55-62 through carburizing and quenching. For splines hardened above HRC 50, we use specialized CNC spline grinding machines to finish the tooth flanks. This grinding process eliminates heat-treatment distortion and achieves a superior Ra 0.2 surface finish.
We utilize imported German and Japanese gear measuring centers (GMC). These advanced instruments physically trace the spline tooth surfaces to map the involute profile, helix deviation, and cumulative pitch error. This allows us to certify that the splines meet ISO Grade 5-8 or AGMA Q10+ standards for zero-backlash meshing.
For heavy-duty applications requiring high impact resistance and torque, we highly recommend 42CrMo or 20CrMnTi alloy steel. 20CrMnTi is particularly excellent after carburizing, as it provides a very hard, wear-resistant surface (HRC 58-62) while maintaining a tough, fracture-resistant core to absorb sudden shock loads.
Trapped chips in spline roots can severely damage mating hubs during assembly. After machining, all gear shafts pass through our dedicated industrial ultrasonic cleaning machines. This high-frequency agitation, combined with high-pressure flushing, removes 100% of micro-burrs and cutting debris from deep cross-holes and spline gaps before the parts are oiled and vacuum-sealed.
