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Home > Timing Pulleys

Timing pulleys (synchronous pulleys) are critical positive-drive transmission components. Their precision-machined teeth engage with timing belts to achieve zero slip, constant speed ratio and accurate motion synchronization. They are widely used in automation equipment, CNC machinery, packaging machines, robotics and inspection stations. Different tooth profiles are designed for different load, precision and speed requirements.

Types of Timing Pulleys

 

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STD Timing Pulleys

STD curved tooth profile is a high-precision, low-backlash design. It runs smoothly at high speed and distributes tooth stress evenly. Common pitches: S2M, S3M, S5M, S8M.

Applications: Precision positioning, semiconductor equipment, small linear modules​​​​​​​​​​​​​​

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T Type Timing Pulleys

T series trapezoidal tooth pulleys are classic general-purpose synchronous pulleys. Standard pitches include T2.5, T5, T10, T20. Simple structure and cost-effective.

Applications: General automation, conveying systems, low-to-medium torque positioning

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AT Timing Pulleys

AT type is the reinforced trapezoidal tooth profile. Compared with standard T type, AT has thicker tooth root, stronger load capacity and better anti-jump performance. Typical pitches: AT5, AT10, AT20. Applications: Frequent start-stop, medium-load transmission such as packaging machinery

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GT Timing Pulleys

GT parabolic tooth pulleys are famous for ultra-low backlash and quiet operation. GT2 is the most popular specification.

Applications: 3D printers, desktop motion platforms, pick-and-place mechanisms, lab equipment

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HTD Timing Pulleys

HTD (High Torque Drive) curved tooth pulleys are optimized for heavy-load transmission. Common pitches: 3M, 5M, 8M, 14M, 20M. The curved tooth shape reduces stress concentration and improves torque transfer.

Applications: Heavy-duty industrial machines, servo drive systems, large power transmission

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Imperial Tooth Timing Pulleys

Imperial (inch-size) trapezoidal timing pulleys follow the US standard. Main models: MXL, XL, L, H, XH, XXH. MXL/XL for tiny light-duty drives; L/H for medium load; XH/XXH for high torque inch-standard equipment.

Applications: Inch-standard equipment and old imported machinery replacement​​​​​​​

Material & Optional Features
Option Description
Aluminum allo Light weight, low inertia, anodized finish, preferred for high-speed precision applications
Carbon steel High strength, wear-resistant, black oxide treatment for heavy torque
Stainless steel Rust-proof, suitable for food, medical and humid working environments
Stainless steel Flanges, keyway bore, set screw locking, taper bushing, custom tooth count & custom machining
Selection Guide
  • Match tooth profile and pitch strictly with your timing belt
  • Confirm required tooth number, belt width and bore diameter
  • Add flanges if belt anti-derailment is needed
  • Select material based on load, operating speed and ambient conditions

* Custom timing pulleys are available according to customer drawings.