Ultra-Precision Machining for Rotational & Power Transmission Components
Where Every Micron Powers Motion, and Every Tooth Drives Performance
In the world of motion systems, the reliability of gears, shafts, and cams defines the performance of engines, drivetrains, and mechanical actuators. These components endure high torque, rotational speed, dynamic stress, and thermal fluctuations — all while requiring micron-level tolerances and surface finishes.
Our CNC facility in China delivers high-precision rotational parts for OEMs and system integrators across automotive, aerospace, robotics, and heavy machinery sectors. From prototype to volume, we provide consistent, high-strength components ready for global performance.
✔ What Makes Power Transmission Machining So Demanding?
Power transmission parts are function-critical — failure leads to catastrophic results. Challenges include:
- Tight coaxiality and roundness: Shafts and sleeves must maintain <0.005mm runout over long spans.
- Hardened surface machining: Post-heat-treatment grinding or hard turning is required for gears, cams, and friction parts.
- Spline & tooth profile accuracy: AGMA / DIN class tolerances must be held in hobbing, shaping, and grinding.
- High-speed fatigue resistance: Balancing and material integrity become critical for rotating at 10,000+ rpm.
- Assembly alignment control: In clutch hubs and planetary carriers, perfect positional alignment is essential.
✔ Precision Components We Regularly Produce
| Component | Typical Accuracy | Application |
|---|---|---|
| Shafts (Input, Output, PTO) | Concentricity < 0.005mm | Engine, gearbox, electric drive units |
| Helical / Spur Gears | DIN 7–9 / AGMA 10 | Transmissions, differentials, gearboxes |
| Splined Hubs & Couplings | Involute profile ≤ DIN 8 | Clutches, transfer units |
| Cams & Followers | Surface Ra < 0.2μm | Valve trains, automation drives |
| Connecting Rods | Big/small end roundness < 0.003mm | Engines, compressors |
All components undergo FMEA and can be supplied with material certs, heat treat reports, CMM data, and full PPAP packages upon request.
✔ Materials and Heat Treatments We Handle
| Material | Heat Treatment | Notes |
|---|---|---|
| 42CrMo4 / 4140 / SCM440 | Quenching + tempering | For high-torque shafts and gear blanks |
| 20CrMnTi / 8620H | Carburizing to HRC 58–62 | For wear-resistant gears, splines |
| S45C / 1045 / C45 | Induction hardening | Balance of toughness and machinability |
| Tool Steel (SKD11 / D2) | Vacuum heat treat | For cams, punches, and high-cycle parts |
| Titanium / Inconel | No/low treatment | Used in lightweight or high-temp drives |
Surface finishing options include grinding, superfinishing, black oxide, phosphate coating, and electroplated or PVD hard coatings.
✔ CNC Capabilities That Drive Our Precision
We employ industry-specific equipment and techniques for high-precision rotational parts:
- CNC Turning with Live Tooling (±0.005mm)
- Cylindrical Grinding (OD/ID) – Roundness < 2μm
- Spline Hobbing & Shaping – Involute form control to DIN 7
- Gear Tooth Grinding (up to module 6) – Helix & pitch error control
- Dynamic Balancing (ISO G2.5) – For shafts, rotors, and cam wheels
- Hard Turning – Post-heat-treated parts with Ra < 0.3μm
Quality inspection is performed using:
- Klingelnberg / Zeiss Gear Testers
- 3D CMMs for geometric precision
- Roundness testers and contour graphing
- Surface roughness and micro-crack detection (MP, PT, UT)
✔ Global Delivery Examples
- ✅ Helical gear shafts (DIN 8) for a German EV transmission program
- ✅ Cam followers for a Japanese industrial robot arm supplier
- ✅ Hardened spline hubs for a U.S. off-road vehicle drivetrain
- ✅ High-speed balanced rotors for Italian electric motor OEM
We support small-batch prototyping, series production (10k+ pcs/month), and Kanban-style inventory partnerships for recurring motion components.
✔ Why Choose Us as Your Motion Machining Partner
- 🔩 Deep experience in rotating and torque-transmitting part manufacturing
- ⚙️ Heat treatment, spline processing, and superfinishing all under one roof
- 📊 Full traceability and ISO/TS16949 quality control system
- 🌍 Global export history covering Europe, Japan, Korea, and North America
- 🕒 Fast DFM feedback and sample turnaround within 7–15 days
🛞 Precision in Every Revolution — CNC Machining That Moves the World
Whether it’s a high-speed shaft, a high-load gear, or a compact drive hub, our machining brings you the consistency, material integrity, and geometric control to keep systems in motion — reliably, cycle after cycle.
📥 Upload your drawing for a quote — and let us power your next project with precision.