Power Transmission • Timing Belt Pulleys

Timing belt pulleys are the component of the timing system that drive the pulley belt to complete the timing belt motion.

A timing belt pulley is an instrument found in an internal combustion engine, used to control the timing of an engine’s valve. The timing belt connects and transmits rotational power synchronously from the crankshaft to the camshaft, which then regulates the opening and closing of the valves. Timing belts can be manufactured in either metal gears or chains, which are more durable, or rubber composite, which is quieter, more efficient, less expensive, and lubrication-free. They typically need to be replaced every 60,000 to 90,000 miles. Leading manufacturers: Nordex, Econobelt, B&B Manufacturing, Gates, Custom Machine & Tool Co. and Stock Drive Products/Sterling Instruments.

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  • JJC & Associates

    JJC & Associates offer an extensive line of time pulleys including flat belly pulleys, timing belt pulleys and round belt pulleys. Material options include aluminum, steel, plastic, and plastic with aluminum insert. Special machining is also offered in any width size, any bore size, flanged or unflanged, keyway, slotted, clamp style, double pulleys and combo. Line of various pitches also include MXL .080, 40DP .0816, XL .200, L .375, H .500, 3mm HTD, 5mm HTD, 8mm HTD, 14mm HTD, 2mm PGGT, 3mm PGGT and 5mm PGGT.

  • Belt Corporation of America, Inc.

    Belt Corporation of America supplies imperial pitch pulleys, metric pitch pulley and pulley stock. The line of imperial pitch pulleys are offered in aluminum or steel with pitch sizes of 0.008, 0.0815, 0.2, and 0.375 inches that vary in other detailed sizes. The line of metric pitch pulleys are aluminum and offered in 3mm and 5mm HTD.

  • Radionics

    Radionics offers classic timing belt pulleys, metric pitch timing belt pulleys and synchronous HTD timing belt pulleys. Radionics' timing belt pulleys have sizes of hub widths that range from 3mm to 27mm. Pitch sizes range from 2.5mm to 8mm. The number of teeth range from 10 to 72. Hub diameters range from 8mm to 110mm. Maximum bore diameter ranges from 3mm to 76mm.

  • B & B Manufacturing

    B&B Manufacturing produces a variety of timing belt pulleys in a wide selection of types and in metric/inch sizes. B&B Manufacturing stocks a collection of plain and finished bore stock aluminum and steel timing belt pulleys. The selection of timing belt pulleys offered includes:

    • Trapezoidal tooth timing pulleys
    • Curvilinear tooth timing pulleys
    • Modified curvilinear tooth timing pulleys
    • Steel Power transmission pulleys
    • Metric trapezoidal timing pulleys
    • Metric bore pulleys

    The styles of timing belt pulleys offered includes:

    • Type 6F (hub and flanges)
    • Type 3F (hubless)
    • Type 6 (no flange)
    • Type 6FC

  • Boston Gear

    Boston Gear's HTD® timing belts feature a lack of slippage, minimal amount of belt tension, and reduced bearing loads without requiring the need for lubrication. The line of timing belts are made of neoprene, covered in nylon and reinforced with fiberglass. The temperature of timing belts range from -18°C to 85°C with a belt speed of 6500 FPM Max. Timing belts of 3mm pitch are offered in a width size of 6mm and 9mm with a braking strength of 74.4 kgs and 111.6kgs respectively. Timing belts of 5mm pitch are offered in a width size of 9mm and 15mm with a braking strength of 234 kgs and 390 kgs respectively. The line of pulleys come in pitch sizes of 3mm and 5mmm, width sizes of 6mm, 9mm, and 15mm, and materials of aluminum and lexan. Pulleys come in single, double or no flanges.

  • Shengzhou Machinery

    Shengzhou Machinery offers a metric standard series of timing belt pulleys with stock bore that come in different pitch sizes, bore diameter sizes, and flange types.

  • Custom Machine & Tool Co., Inc.

    Custom Machine & Tool Co manufactures timing belt pulleys, including synchronous timing pulleys with or without a CMT Bushing system, timing pulley flanges, timing belts, timing pulley stock, v-ribbed belts and pulleys, and round belt pulleys. Pulley types are offered in MXL, XL, 3mm HTD, 5mm HTD, 2mm GT2, 3mm GT2 and 5mm GT2. Belt widths are offered in .0375, 6mm, 9mm, 15mm and 25mm and in material types of aluminum and molded nylon.

  • F.N. Sheppard & Co.

    F.N. Sheppard & Co supplies timing pulleys and hardware. The line of pulleys for standard belt widths come in metric sizes of T5, T10, T20, AT5, AT10 and AT20, in pitch sizes of XL, L, H and XH, and in HTD of 5m and 8m. The line of pulley bar stock is offered as a long length material for custom machining. The line comes in metric sizes of T2.5, T5, T10, AT5 and AT10, in inch pitch of XL, L and H, and in HTD of 5m and 8m. Pulleys can be customized in pitch sizes, custom materials and any other detail.

  • Quality Transmission Components

    Quality Transmission Components supplies metric belt pulleys and inch belt pulleys. The line of metric belt pulleys and inch belt pulleys are offered in MXL, XL, L, HTD3, HTD5, HTD8, T2.5, T5, T10, AT5, and AT10.

  • Gates Corporation

    Gates Mectrol manufactures timing pulleys in three different options of standard pulley program, modified pulley program and custom pulley program as well as pulley bar stock. The Standard Pulley Design Program offers aluminum pulley, two zinc coated steel flanges, hub, pilot bore and many tooth counts; pulley tooth pitches are offered in AT5, XL, T10, T5, L, H, AT10 in sizes of 5mm, 10mm, 0.200", 0.375", and 0.500". The Modified Pulley Program offers the stock pulleys in the Standard Pulley Program with modifications that include finished bore, set screw holes and hub removal. The Custom Pulley Program is customized for made to print custom pulley requirements. Its pulleys are made in materials of aluminum, steel and stainless steel. Its flanges are made in zinc plated steel and stainless steel for stainless steel pulleys. Coatings are offered in clear/black anodize, clear hardcoat, black oxide and electroless nickel.

  • Involute Tooling Corp.

    Involute Tooling Corp. supplies timing belt pulley drives in pitch sizes of 0.08"M X L, 0.20" XL, 3/8" L, 1/2" H, T5, T10, AT5, AT10 and HTD. High torque synchronous drives are offered in sizes of 3mm HTD, 5mm HTD, 8mm HTD, 8mm SHTD, 14mm, HTD and 14mm SHTD. Synchronous pulleys are offered in pilot bore, finished bore with a key-way, or finished bore with taper bores. Pulleys are made in steel, cast iron or aluminum.

  • Grob, Inc.

    Grob, Inc. provides Grob standard timing pulleys in aluminum or steel. Its outer diameters are built up to 6" and they are available in standard pitches of 0.080 MXL, 1/5 XL, 3/8 L, 1/2 H, HTD series, GT series and etc.

  • Huco Dynatork

    Huco Dynatork provides classic timing belts, HTD timing belts, Polyurethane belts, classic pulleys, HTD pulleys and metric pulleys. The classic timing belts are offered in MXL, L and XL. The HTD timing belts come in pitch sizes of 3mm. 5mm and 8mm. Polyurethane belts are offered in T2.5 and T5 with a temperature range of -30 to 80 degrees Celsius. Classical timing belt pulleys come in pitch sizes of 5mm and 9mm and in materials of steel, aluminum and cast iron. The 3mm pitch HTD timing belt pulleys are made of aluminum whereas the 5mm and 8mm pitch HTD timing belt pulleys are made of steel. THe metric timing belt pulleys are made of aluminum and in pitch sizes of 2mm and 5mm.

  • Onvio LLC

    Onvio LLC produces pulleys, bar stock and clamp plates in english pitch, metric pitch and curvilinear pitch. Optional construction materials for pulleys, bar stock and clamp plates include aluminum, steel, stainless steel and plastic. Finished pulleys can be made to order. Bar stocks can be made in lengths up to 24 inches. Clamp plates are customized to meet the design of current linear belting.

  • Pfeiffer Industries

    Pfeiffer Industries supplies metric timing belt pulleys (driver), metric timing belt pulleys (driven), metric belt pulley bar stock, belt guide flanges, mounting hubs, bushings, ContiTech Metric timing belts, and timing belts slit to any width.

  • Polytech Design Inc

    Polytech Design Inc. offers a wide selection of pulleys, bar stock and flanges in metric T, metric AT, inch pitch and HTD metric. In the metric T line, pulleys and bar stock are made of aluminum and offered in T2.5, T5, and T10 with belt width sizes ranging from 6mm to 50mm. In the metric AT line, pulleys are made of aluminum and are offered in AT5 and AT10 with belt width sizes ranging from 10mm to 50mm; its bar stock is made of aluminum or steel and offered in AT5 and AT10. In the inch pitch line, pulleys and bar stock are made of aluminum and offered in MXL, XL, L and H types. In the HTD metric line, pulleys are made of aluminum, steel or cast iron and offered while the bar stock is offered in aluminum. The flanges are made of steel.

  • Nordex, Inc.

    Nordex Incorporated manufactures precision round belt pulleys, cluster pulleys, idler pulleys and pulley stock. The line of timing belt pulleys come in inch sizes of 0.080 to 3/8 pitch and metric GT and HTD series with 2mm to 8mm pitch. Pulleys are availalbe as single flanged, double flanged and un-flanged.

  • Torque Transmission

    Torque Transmission offers timing belt pulleys available in a variety of sizes including XL 1/5" pitch timing belt pulleys, L 3/8" pitch timing belt pulleys, HTD 3mm/5mm/8mm pitch timing pulleys and custom design timing belt pulleys.

  • Van Zeeland Manufacturing Inc

    Van Zeeland Manufacturing Inc offers timing belt pulleys and synchronous sprockets in a variety of sizes, number of teeth and thickness. Timing belt pulleys and synchronous sprockets are offered in steel, aluminum, stainless steel, plastic, and nylon. Timing belt pulleys are available sizes and types including 1/5" pitch XL in T5 and AT5, 3/8" pitch L in T10 and AT10, and 1/2" pitch H in T20 and AT20. Synchronous sprockets are available in 5mm HTD, 8mm HTD, and 14mm HTD.

  • Tracey Gear & Precision Shaft

    Tracey Gear & Precision Shaft manufactures pulleys and timing belt pulleys. They are available in steel, stainless, bronze, aluminum and nylon. Pulley and timing belt pulley have a capacity up to 36 inches.