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This section provides an overview for idler pulleys as well as their applications and principles. Also, please take a look at the list of 27 idler pulley manufacturers and their company rankings. Here are the top-ranked idler pulley companies as of December, 2024: 1.The David Round Co., Inc., 2.TERRE., 3.Brewer Machine & Gear Company.
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An idler pulley primarily guides V-belts, timing belts, and drive chains. It is responsible for restraining and positioning the belt within a machine. Various designations, such as idle gear, idle pulley, and idle wheel, are used to describe it.
"Idling" is a technical term in machinery, meaning "not in use" or "idle." The "idler pulley" is named after this term, supporting the tensioner pulley that adjusts belt tension.
This article primarily discusses idler pulleys as automotive parts.
Idler pulleys are commonly used in V-belts and timing belts, and are widely employed in automobiles and industrial machinery. In automobiles, these belts drive fans, air conditioners, and power steering systems and are involved in operating valves related to engine ignition. Tensioner pulleys adjust the tension of these belts, and idler pulleys are installed opposite the belt to reduce bouncing and flapping.
Idler pulleys are circular and contain an internal bearing. They have grooves on the outside for attaching a belt, allowing the installation of V-belts or timing belts. When drive torque is transmitted from the crankshaft through the belt, idler pulleys rotate, clamping the belt and transmitting torque to the camshaft.
Unlike tensioner pulleys, which adjust tension, idler pulleys do not have mounting holes for springs or slots in the bracket for position adjustment. They only feature a bearing for rotation and a groove for mounting the belt. Their primary function is to rotate in conjunction with the tensioner pulley.
However, the tensioner pulley alone can only secure the belt on one side. Therefore, the idler pulley is essential for clamping the belt from both sides.
As idler pulleys have built-in bearings, regular replacement is crucial to prevent sticking or seizure. In automobiles, it is recommended to replace idler pulleys along with the V-belt and timing belt after a certain mileage, such as 100,000 km.
*Including some distributors, etc.
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The David Round Company, Inc. was founded in 1869 and is based in Streetsboro, Ohio. The company is one of the world’s oldest hoist manufacturers. The company’s customers include Pfizer, General Mills, Ford, and Exxon Mobile, representing pharmaceutical, food processing, automotive, and oil & gas industries. The company’s custom-engineered hoists and related products include jib cranes, winches, and tractor drives. The company custom engineers machines and replacement parts to fit individual customer needs for projects both large and small.
SDP/SI was founded in 1950 and is situated in New Hyde Park, New York. SDPP/SI is a manufacturer of precision gears and high-quality mechanical components used in the aerospace, industrial manufacturing, medical technology, and robotics fields. The company manufactures parts in a variety of materials including alloy steel, stainless steel, bronze, brass, nylon, and titanium. The company also provides coating services such as heat treating, zinc plating, and painting. Additional custom options are available including manufacturing to customer drawings and specifications.
PSM Industries is a family business founded in 1956 and is based in Los Angeles, California. PSM provides solutions in parts fabrication through powder metal technology. Through this, PSM serves industries including medical, sporting goods, food service, and aerospace. PSM Industries consists of 4 categories of divisions throughout the United States. High-Performance PM includes Pacific Sintered Metals, PM Engineered Solutions, and BestMetal. High Wear Carbides Includes PM Krupp High-Speed Steels and Yilik Precision Carbides. The other two categories are metal injection molding featuring PolyAlloys and engineered plastics featuring W.M. Guliksen.
J.W. Winco was originally founded as Ganter in 1894 in Germany. Winco specializes in parts manufacturing. Parts offerings the operating parts segment including handles, adjusting, and positioning parts; clamping parts segment featuring tensioning, clamping, switching, and levers; and finally the machine parts segment with indexing, locking, mounting, connecting elements, guides, spindles, rollers, magnets, casters, and wheels. Winco’s complete catalog contains over 75,000 standard parts. Winco is also ISO 9001 certified. Winco offers free CAD downloads and technical documentation for many arts.
BRECOflex CO., L.L.C., founded in 1989, is a manufacturer of high precision timing belts, pulleys, and accessories for the power transmission and precision mechanical component industries, headquartered in Eatontown, New Jersey. The company offers a wide range of products including timing belts, pulleys, tensioning clamps, tensioners, flat belts, and accessories. Their products are used in many industries including packaging, food processing, robotics, medical equipment, and more. Their state-of-the-art manufacturing facility and experienced engineering team allow it to provide custom solutions to meet the unique needs of customers with the highest level of customer service and support.
A.J. Rose Manufacturing, established in 1990, is a reputable manufacturer of automotive components based in the USA. Devoted to producing precision-engineered parts for the automotive industry, A.J. Rose Manufacturing offers engine mounts, suspension components, and transmission mounts manufactured with advanced techniques and stringent quality control. Catering to automotive OEMs, their unique proposition lies in a continuous drive for innovation, evident in cutting-edge production methods. With a strong customer orientation, A.J. Rose Manufacturing stands out as a partner in the automotive supply chain.
Dura-Belt, Inc., an American-based ISO certified manufacturer having its plant situated in Hilliard, Ohio, and sales office in Warsaw, Poland, specializes in producing polyurethane belts and conveyor belt components since 1987. The company utilizes a proprietary welding process and urethane, cyclothane, polyester, PVC, and other materials to produce belts suitable for power transmissions and conveyor belts. They sell standard and specialty belts such as V-belts, O-ring belts, and line shaft belts along with accessory equipment such as wheels, pulleys, spools, and sleeves. The company offers a full ten year warranty on all belts that it distributes worldwide.
Retlaw Industries Inc., founded in 1977 and based in Hartland, Wisconsin, is a manufacturer of custom thermoplastic OEM parts. Its product catalog encompasses idler pulleys, adapters, sprockets, and rebar chairs, designed, engineered, and manufactured to precise standards, catering to industries like lawn and garden, concrete, fitness, and more. Alongside its standard product offerings, the company also provides custom thermoplastic solutions. The company upholds strict quality control processes, and an ISO 9001:2015 certification, ensuring precision and durability in its products.
G&G Manufacturing Co. is an American manufacturer of power transmission products and parts that was founded in 1943. Based in Omaha, Nebraska, the company produces over 3,500 standard transmission components including light duty sheaves and bushings, sprockets, power take-off (PTO) drivelines, and roller chains. These are used by clients in the material handling, military, mining, and agricultural sectors. G&G also offers engineering and fabrication services for customer projects that have unique specifications.
The Timken Company (Timken) was founded in 1899 and is headquartered in North Canton, Ohio. Timken designs, manufactures, and manages engineered bearings and industrial motion products worldwide. Timken operates in two segments, Mobile Industries and Process Industries. The Mobile Industries segment’s portfolio includes bearings, seals, and lubrication devices and systems. The Process Industries segment provides industrial bearings and assemblies; industrial motion components, such as gears and gearboxes; and linear motion products, couplings, seals, lubricants, chains, belts, and related products and services to OEMs and end users in various industries.
TERRE, established in 1946, is headquartered in Texas, USA and is a provider of cost-effective replacement parts, general-purpose mechanical motion parts, and outdoor power equipment. The centrality of product and service quality underpins all their endeavors. TERRE™ is a supplier headquartered in the United States that specializes in providing authentic OEM replacement and general-purpose mechanical motion components, finished goods, and solutions to a global customer base. These customers include retailers, manufacturers, dealers or distributors, and individuals seeking solutions for various applications such as home improvement, agriculture, lawn and garden maintenance, and other related areas.
Brewer Machine & Gear Company is a manufacturer and distributor of tensioners and accessories for industrial applications. Established in 1944, the company is based in St. Louis, Missouri, USA. The company specializes in designing and manufacturing a wide range of "custom" gears and sprockets. Its product offerings include spurs, helicals, miters, bevels, and worm gears as well as timing pulleys (including HTD), sprockets tensioners, accessories, and custom solutions, serving sectors such as packaging, paper processing, and textiles. Brewer Machine & Gear Company provides services like technical consultation and product customization.
Global Bearings Import (GBI), based in Austell, Georgia, provides quality bearings and related products in the power transmission industry. Established in 1977, GBI offers ball bearings often used in aerospace, roller bearings, seals, and various other power transmission components. As part of an integrated family of companies under KS Supplies, GBI boasts exceptional customer service, technical expertise, and competitive pricing, making it a trusted partner for businesses seeking reliable and efficient solutions for their bearings needs.
AIRMATIC was founded in Philadelphia in 1944. AIRMATIC serves a many industries including cement and concrete, oil, gas, energy, biomass, chemical products, feed & grain, food manufacturing, glass & ceramics, and clay. For these industries, AIRMATIC provides installation, maintenance, fabrication, silo cleaning, inspection, and repair, as well as repair and rebuilding of power tools. AIRMATIC also has an extensive lineup of products for sale including air cannons, automatic lubrication systems, belt conveyor components, flow detectors, finishing equipment, safety equipment, industrial vibrators, railcar openers and unloading equipment, rebar tools, valves and actuators, and mechanical force exciters.
Miki Pulley Co., Ltd., founded in 1939, is a manufacturer and provider of solutions for power transmission and control problems, headquartered in Kawasaki City, Japan. They manufacture various products essential for all industries, including couplings for high-precision power transmission, electromagnetic clutches and brakes for power transmission when energized, and speed changers and reducers for controlling the speed of machinery. They also offer inverters, linear shaft drives, rotation speed indicators, torque limiters, and ROSTA rubber springs.
XIAMEN GB Bearing, established in 2009, and based in Fujian, China, is a manufacturer and supplier of bearings. The product portfolio includes a diverse range of agriculture, automotive, deep groove, thrust ball, tapered roller, pillow block, needle, and ball bearings. The products are widely used in various industries which include automobile, machinery, door hardware, and other sectors. The company also offers quality control systems with material analysis, metallography, inspection, clearance, and life test machines.
Xinlong Machinery and Equipment (Zhengzhou) Co., Ltd. (XME), established in 2004 in Zhengzhou, China, is a manufacturer of precision-engineered components. Its product portfolio includes precision forgings, castings, seamless rolled rings, hot forged parts, and custom-manufactured components in various materials based on customer specifications. The company serves over 20 industries, including automotive, railway, wind power, mining, and more. The company holds ISO 9001, SGS, and TS 16949 certifications, demonstrating its adherance in industry standards.
Designatronics is based in New York, New York, USA, and is a manufacturer of mechanical products and components that was established in 1960 following the acquisition and subsequent merger of Quality Bearings & Components, QTC Metric Gears, SDP/SI, and Wybur Tools. The company’s products include belt and chain drives for enabling motion and power, gears for transmitting motion and power, and various shafts for supporting and connecting assembly components. The company’s products are used mainly by clients in the aerospace, automotive, and defense sectors.
Mitsuboshi Belting Ltd. was founded in 1919 and headquartered in Japan is a manufacturer of rubber and plastics for automotive and industrial power transmission belts. The company offers an extensive and diversified product portfolio including conveyor belts, waterproof materials for civil engineering, architectural waterproofing materials, engineering plastic materials and processing, and SF foam injection molding. These products span a wide spectrum of industries and sectors including housing complexes, transportation, automobiles, and construction as heat resistors.
Dynaloc Corp, founded in the year 1989, and based in California, USA, is a manufacturer and supplier of cleaning pulleys. Their product portfolio includes tracking pulleys, VTF thin film unwrinkling pulleys, and belt cleaning pulleys. The company offers all patented products which are made in steel, aluminum, and all stainless steel construction. They also have expertise in providing Positrac conveyor belt tracking wurg cleaning pulleys. The products are used in various industries which include mining, agriculture, automotive, food, and beverage industry.
T.W. Evans Cordage Co. is a supplier of cordage and related products established in 1929 in Cranston, Rhode Island, USA. The company's products include twisted ropes for landscaping or general purpose applications, braided rope for marine applications, and twines for use in masonry or fishing. It also offers plastic cord for home use, clothesline accessories, and snaps for fastening or attaching. The company's products are commonly used by hardware manufacturers, OEMs, and rescue operators.
Jason Industrial was founded in 1958 in Fairfield, New Jersey. Today, Jason Industrial is the hose division of AMMEGA and manufactures a range of both industrial and hydraulic hose, couplings, equipment, and accessories. Jason Industrial products are designed for the industries in which they serve including agriculture, chemical, HVAC, material handling, and mining. Jason Industrial's product lines include industrial hose products, hydraulic hose products, agricultural hoses, skateboard products, and belts. Jason Industrial also provides guides and resources for distributors and end users.
BDI Exppress was established in 1935 and is headquartered in Cleveland, Ohio. BDI develops and deploys custom distribution and supply chain solutions for customers across Asia, Europe, and North America. BDI serves multiple industries including automotive, primary metal, food processing, public utilities, pulp and paper, mining, material handling, bearings, mechanical power transmission, electrical power transmission and motion control, linear motion, pneumatic and hydraulic fluid power, industrial, safety, and material handling.
Hayden Automotive, founded in 1961, is a supplier of automotive cooling solutions, specializing in products for transmission, engine, and power steering oil cooling. It offers a diverse range of products including fan clutches, electric fans, performance oil, power steering, and transmission coolers, which find applications in various industries. The company's adherence to quality is evident through its ISO 2001:2015 certification and rigorous testing and validation processes. As part of Standard Motor Products, Inc., it offers automotive parts in the aftermarket and original equipment manufacturing sectors, ensuring vehicles run efficiently.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | The David Round Co., Inc. |
20.2%
|
| 2 | TERRE. |
7.9%
|
| 3 | Brewer Machine & Gear Company |
7.9%
|
| 4 | Stock Drive Products/Sterling Instrument - SDP/SI |
6.7%
|
| 5 | Dura-Belt, Inc. |
5.6%
|
| 6 | Gates |
4.5%
|
| 7 | Xinlong Machinery and Equipment |
4.5%
|
| 8 | TIMKEN |
4.5%
|
| 9 | IDC Select |
3.4%
|
| 10 | BRECOflex Co., LLC |
3.4%
|
Derivation Method
The ranking is calculated based on the click share within the idler pulley page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
17 | 85.0% |
|
China
|
2 | 10.0% |
|
Japan
|
1 | 5.0% |
26 products found
26 products
Union Maeda Co., Ltd.
260+ people viewing
Last viewed: 1 hour ago
It is a steel sheet V pulley from φ70 to φ254.
Kanemitsu Co., Ltd.
40+ people viewing
Last viewed: 23 hours ago
■Features ・Carbon neutral - Lighter weight ・Environmentally friendly products ・Thickening method ・No cutting
Robotena Co., Ltd.
160+ people viewing
Last viewed: 15 hours ago
Fast Response
20mm diameter.
2 models listed
Robotena Co., Ltd.
140+ people viewing
Last viewed: 12 hours ago
Fast Response
Compatible with Mabuchi motor 2mm shaft. Compatible with commercially available rubber bands. Comes with screws.
Mitsukai Seisakusho Co., Ltd.
420+ people viewing
Last viewed: 8 hours ago
Pulley coupling for vacuum pump compressor. * There are other model numbers.
10 models listed
MIKI PULLEY CO., LTD.
250+ people viewing
Last viewed: 12 hours ago
By attaching an arm to the suspension unit and setting rollers and sprockets, it can be used as a tensioning, pressure roller, or damper. The outer...
3 models listed
