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High-CNC Shock Absorber Sleeves for Demanding Torque Transmission
At Xierge Precision Machinery Co., Ltd., we leverage over 30 years of operational experience since 1990 to manufacture premium CNC Shock Absorber Sleeves for the automotive, industrial machinery, and heavy equipment sectors. Spline shafts are critical transmission elements that require extreme geometric precision, high fatigue resistance, and perfect concentricity to transfer high torque seamlessly to mating hubs. Even a microscopic deviation in the spline profile can lead to premature wear, excessive backlash, and system vibration.
To achieve flawless results, we utilize Japanese imported Star CNC Swiss-type lathes and advanced multi-axis machining centers. This specialized equipment allows us to perform complex milling, hobbing, and threading operations in a single setup, ensuring absolute concentricity between the bearing journals and the spline sections. The guide bushing technology on our Swiss lathes provides continuous support, eliminating deflection when machining long, slender spline shafts.
Following our core principle of "Integrity Oriented, Quality Foremost," we strictly adopt premium alloy steel raw materials, such as 20CrMnTi and 42CrMo, 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 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 Shock Absorber Sleeves Technical Specifications
| Spline Types | Involute Splines, Straight-sided Splines, Serration Splines, Custom Profiles |
|---|---|
| Module / Pitch | Module 0.5M to 5.0M; DP (Diametral Pitch) 5 to 48 |
| Primary Equipment | Star CNC Swiss-type Lathes, 4-axis CNC Machining Centers, Gear Hobbing Machines |
| Precision Grade | ISO Grade 5-8 (DIN 5480 / ANSI B92.1), AGMA Q10+ |
| Available Materials | 20CrMnTi, 42CrMo, 40Cr, 1045 Carbon Steel, SUS440C, Stainless Steel |
| 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 |
| Machining Features | Cross-drilled Holes, Keyways, Threaded Sections, Custom Tapers |
| Inspection Equipment | German/Japanese Gear Measuring Centers, CMM, Hardness Testers, Optical Comparators |
Core Advantages of Xierge Precision Spline 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 automotive transmissions.
- Advanced Thermal Deformation Control: We meticulously manage heat treatment processes (induction hardening/carburizing) and utilize precision grinding post-treatment to correct any micro-warping, restoring exact spline tolerances.
- Zero-Backlash Spline Grinding: For critical applications, we offer precision spline grinding to achieve ultra-tight tooth profiles (Ra 0.2), significantly reducing backlash and mechanical noise during high-speed rotation.
- 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 spline shaft passes through our dedicated 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 spline designs from 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 precision spline 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 spline 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 splined 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 spline 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 sealed.
