China Custom Timing Belt Pulley XL Type with Best Sales

Timing pulleys are specialized pulleys with either teeth or pockets around the outside diameter of the pulley body. These teeth or pockets are used only for timing, not power transmission. Timing teeth engage holes in the metal belt, while timing pockets engage drive lugs on a belt’s inner circumference.

The synchronous wheel transmission is composed of an endless belt with equal-spaced teeth on the inner peripheral surface and a pulley with corresponding teeth. During operation, the toothed teeth mesh with the tooth grooves of the pulley to transmit motion and power, which is integrated with the belt—a new type of belt drive with the advantages of transmission, chain drive, and gear transmission.

Products Description

Product Name

Timing Belt Pulleys

Teeth profile Trapezoidal toothed MXL, XXL, XL, L, H, XH, XXH
T-toothed T2.5, T5, T10, T20
Arc toothed HTD3M, HTD5M, HTD8M, HTD14M, HTD20M, Gt1.5,Gt2, Gt3, Gt5
S-toothed S2M, S3M, S4.5M, S5M, S8M, S14M
Parabolic-toothed P2M, P3M, P5M, P8M, P14M
Teeth Quantity 10-150 teeth or customized
Inner Bore 2-200mm H7 precision or customized
Belt width

4mm, 6mm, 9mm, 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 40mm, 50mm,
1/4”, 5/16”, 3/8”, 1/2”, 3/4”, 1”, 1.5”, 2”or customized

Application 3D printer, Automation equipment, Power transmission, Embroidery machine, etc.
Accessories We can provide the service of assembling setscrews, bearings, shafts, or taper bush.
Surface treatment Anodize, Black Oxide, Phosphate, and Galvanization
Material Aluminum,Steel,Stainless steel,POM,Plastic,Nylon

Features of Timing Belt Pulley

1. It has the characteristics of the gear drive, chain drive, and flat belt drive;
2. The transmission is stable and accurate, with buffering, vibration reduction capabilities, and low noise;
3. The speed ratio range is large, the transmission efficiency is high, and it can be used for long-distance transmission;

What is a Timing Belt Pulley Used For?

Pulleys are designed in several ways to meet various applications. Generally, a pulley belt is smooth and tasked with power transmission between components. The belt generates frictional force along the pulley’s surface (often ribbed), causing rotation of the gear body. Traditional drive belts allow for asynchronous, variable-speed operations. However, the ribbed, level surface introduces slippage and timing risks.

Timing belt pulleys – also called synchronous timing belt systems – are primarily used to align the motion of multiple gear shafts. Synchronous systems generally maintain longevity and emit less noise than gear or chain drive units.

Timing belt pulleys are used for food processing, sewage treatment plants, filling machinery, transport equipment, electronic and medical instruments, glass machinery, aircraft accessories, ship manufacturing, appliance, auto, industrial equipment, and metal stamping hardware.

How To Choose A Timing Belt Pulley?

Synchronous pulleys may be used for:

  • Conveyance. Applications such as conveyor belts, processing, and packaging.
  • Power Transmission. They deliver power to ancillary or auxiliary components in an engine.

Packaging, automobile, and large-scale industrial applications require different timing belt specifications.

An appropriate timing belt depends on several factors, including the material, environment, and size. Evaluating the belt unit’s operating conditions will affect its application (extensive vs. small equipment), durability, and general safety.

Sizing Options & Applications

There are countless applications and sub-applications for timing pulleys. For example, a car’s power steering complex may use 6 or more gear components in a single pulley system. Alternatively, simpler systems may only require a 2-gear, 1-belt unit. Operators should consider teeth volume, time rating, pitch, belt and gear widths, belt lengths, and component weights.

Environmental Factors

Environmental variables can significantly affect timing belt pulley function. Pulley systems should be regularly inspected for component integrity, debris build-up, and general wear and tear.

  • Temperature and Pressure. Depending on the material construction, operators should closely monitor ambient temperature and pressure levels. For instance, plastic pulleys will fare worse in high-temperature environments.
  • Humidity and Corrosion. Polycarbonate structures degrade in the presence of various gases and oils. Certain metals will be more susceptible to corrosion and grease accumulation.
  • Oil and Gas Exposure. Urethane and polyurethane units may be preferable in environments where oil, grease, or caustic gas is a consistent exposure risk.
  • Debris and Particulates. The material build-up in the pulley can cause blockages or frictional imbalances. System maintenance should include de-greasing and debris removal.

Material Considerations


Steel is the hardest of materials available for timing belt pulley design. The metal is mainly immune to harsh environments and maintains the highest tensile strength among commonly used pulley materials. Steel components resist heat, cold, and chemical exposure – even over long periods.


Plastic timing belt pulley options typically include nylon, polycarbonate, and acetal materials. Plastics quickly mitigate oxidative conditions and generally require less maintenance than alternative materials. In addition, plastic pulleys provide the lightest and most affordable options for operators. The effectiveness of plastic drops off in more extreme operating conditions.

  • Nylon. Naturally lubricative surface, low noise, and non-abrasive. Low maintenance requirements. Limited tensile strength is relative to metal or plastic options.
  • Acetal. Lightweight and high level of chemical resilience. Low melting point.
  • Polycarbonate. Physically durable and malleable material. They are easily degraded by retro materials (oils, gases).


Aluminum balances steel’s metallic durability and plastic’s lightweight malleability. The versatility of aluminum makes it 1 of the more familiar material variants implemented by timing belt pulley systems. Almost entirely resistant to heat conditions, aluminum is perfect for intensely high-temperature environments.

Why Choose Us Timing Belt Pulley?

Timing pulleys are widely used in various equipment where the timing of both drives is precious, and the display ratio is essential. A timing pulley’s benefit is eliminating slippage and maintaining constant angular velocity. Timing pulleys are manufactured per international and national standards with carbon steel/alloy steel/aluminum and hardened teeth to provide long life. We have been ranked as the most dependable and leading firm worldwide and actively emerged to offer a wide array of timing belts. Our sophisticated production unit’s timing pulleys are fabricated by our skilled personnel using advanced technology.

Known for superior sturdiness, dimensional accuracy, and durability, the offered range is manufactured in compliance with industry norms and guidelines. Further, we provide these components in various customized forms according to patrons’ specific requirements. Apart from this, these pulleys are quality tested by our quality controllers on different parameters.

1) Warranty: our timing pulley’s quality is excellent, and with insurance within 1 year, when you receive the products and find quality problems, we promise you could return it and free maintenance.
2) Drawings: please send your timing pulleys’ drawings to us to get the best quotation; If you have no drawings, please get in touch with us, then we can work out CAD drawings and the best reference for you ASAP.
3) Sample: we accept one-piece sample orders. We could do examples until you’re satisfied.
4) Confidentiality agreement: Strictly adherence to client confidentiality agreement for timing pulleys.

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