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CNC Machined Timing Pulleys Technical Specifications
| Pulley Types | HTD (3M, 5M, 8M), AT (AT5, AT10), Trapezoidal (MXL, XL, L, T2.5, T5), Polychain |
|---|---|
| Primary Equipment | Star CNC Swiss-type Lathes, 4-axis CNC Machining Centers, Profile Grinders |
| Dimensional Tolerance | Pitch Diameter: ±0.01mm; Bore Diameter: ±0.005mm (H7) |
| Geometric Tolerances | Radial Runout: 0.01mm; Concentricity (Bore to Teeth): 0.005mm |
| Common Materials | AL6061-T6, AL7075, 45# Carbon Steel, 40Cr, SUS303, SUS304 |
| Heat Treatment & Hardness | Steel: Quenching & Tempering (HRC 28-32); Aluminum: T6 Temper |
| Surface Roughness (Ra) | Tooth Flanks & Bore: Ra 0.8; General Surfaces: Ra 1.6 |
| Machining Features | Custom Tooth Profiles, Taper Bores (BT/ISO), Keyways, Threaded Mounting Holes, Flanges |
| Surface Treatments | Hard Anodizing (Aluminum), Black Oxide (Steel), Zinc Plating, Passivation |
| Inspection Equipment | Japanese/German CMM, Gear Tooth Calipers, Optical Comparators, Runout Testers |
High-Precision CNC Machined Timing Pulleys for Synchronous Power Transmission
At Xierge Precision Machinery Co., Ltd., we leverage over 30 years of operational experience since 1990 to manufacture premium CNC Machined Timing Pulleys for the automotive, medical, robotics, and industrial automation sectors. Timing pulleys are critical transmission components that require exact tooth pitch, superior surface finishes, and flawless concentricity to ensure synchronous power delivery without slippage. In high-speed or precision motion control applications, even a microscopic deviation in the tooth profile or pitch diameter can lead to excessive belt wear, skipped teeth, vibration, and a complete loss of positional accuracy.
To achieve flawless results, our state-of-the-art facility is equipped with Japanese imported Star CNC Swiss-type lathes, advanced 4-axis CNC machining centers, and precision grinders. This specialized equipment allows us to machine complex tooth profiles (such as HTD, AT, MXL, and T-type), precision taper bores, and mounting flanges in highly rigid, single setups. Our advanced multi-axis milling capabilities enable us to cut exact involute or curvilinear tooth forms directly into solid bar stock or castings, ensuring optimal meshing with the timing belt.
Following our core principle of "Integrity Oriented, Quality Foremost," we strictly adopt premium raw materials, such as AL6061/7075 aluminum alloy, 45# carbon steel, and SUS303 stainless steel, tailored to your specific torque and weight requirements. To guarantee reliable product performance, we apply strict quality inspection protocols utilizing a complete set of testing instruments imported directly from Japan and Germany, verifying pitch deviation, runout, and concentricity. 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.
Core Advantages of Xierge CNC Machined Timing Pulleys
- Exact Tooth Profile Machining: Our 4-axis CNC machining centers utilize specialized form cutters to machine precise curvilinear and trapezoidal tooth profiles, ensuring perfect belt meshing and zero backlash in motion control systems.
- Single-Setup Concentricity: Using Star CNC Swiss-type lathes, we turn the bore, hub, and outer diameter in one continuous operation, maintaining extreme concentricity between the mounting bore and the pitch circle.
- Lightweight Material Mastery: We have mature processing parameters for AL7075 and AL6061, providing high strength-to-weight ratios essential for high-speed robotics and medical automation, while preventing inertia-induced vibration.
- Advanced Surface Treatments: We apply hard anodizing to aluminum pulleys, significantly increasing tooth flank surface hardness and reducing friction wear, extending both the pulley and timing belt lifespan.
- Complex Bore Machining: We can precisely machine standard H7 bores, custom taper bores (for direct motor mounting), and integrated keyways or locking thread holes without distorting the tooth geometry.
- World-Class Metrology Assurance: Our quality lab utilizes imported Japanese and German CMMs and optical comparators to map pitch deviation, tooth angle, and radial runout on every production batch.
- 3-Decade OEM/ODM Expertise: Since 1990, we have continuously innovated, collaborating closely with clients to optimize DFM (Design for Manufacturing) for custom multi-stage pulleys, scaling seamlessly 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 CNC machined timing pulleys, we accept standard T/T (Telegraphic Transfer) with a 30% advance deposit and 70% balance before shipment. For large-scale industrial or automotive 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 timing pulleys have delicate tooth profiles and precision bores highly susceptible to impact and oxidation, we utilize specialized packaging: each pulley is individually wrapped in VCI (Volatile Corrosion Inhibitor) anti-rust paper, separated by custom EPE foam slots or blister trays to prevent tooth-to-tooth contact, and packed in sturdy export-grade cartons or wooden cases to ensure zero deformation and surface damage during international transit.
FAQ
Proper meshing requires exact replication of the tooth flank radius. We use dedicated CNC form milling cutters mapped precisely to the HTD profile standards. We then utilize imported Japanese and German optical comparators and CMMs to trace the tooth flanks, verifying the curvilinear radius, pitch deviation, and tooth depth to ensure zero backlash and smooth belt engagement.
Yes. Using our 4-axis CNC machining centers, we can machine complex multi-stage pulleys where, for example, an AT5 pitch section and an HTD 5M section coexist on the same hub. By utilizing live tooling and precision indexing, we maintain strict axial alignment and concentricity between the different stages, critical for synchronized multi-axis drive systems.
For high-speed robotics where low inertia and wear resistance are paramount, we recommend AL7075-T6 aluminum with Type III Hard Anodizing. Hard anodizing builds a thick, extremely hard ceramic layer (HV 400+) on the tooth flanks and bore, preventing the timing belt from rapidly wearing away the softer aluminum substrate.
Machining deep taper bores can induce stress that warps the pulley body. We rough-machine the taper bore first, stress-relieve the component, and then finish-machine the teeth and outer profile. Finally, we precision-hone or grind the taper bore to exact dimensions, ensuring the taper gauge contacts 85%+ while maintaining strict radial runout on the teeth.
We utilize specialized runout testing fixtures and CMMs. A precision mandrel is press-fit or held in the H7 bore, and the pulley is rotated on V-blocks. A dial indicator or CMM probe is placed against the tooth flanks or the outer reference diameter to map the radial runout, ensuring it remains within strict 0.01mm tolerances for high-speed applications.
Yes. With over 30 years of experience supplying the automotive industry, we are fully compliant with PPAP (Production Part Approval Process) requirements. We provide complete documentation, including dimensional layouts, material certificates, capability studies (Cpk/Ppk), and measurement system analysis (MSA) to ensure seamless integration into your automotive supply chain.
