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This section provides an overview for auto tensioners as well as their applications and principles. Also, please take a look at the list of 8 auto tensioner manufacturers and their company rankings. Here are the top-ranked auto tensioner companies as of April, 2025: 1.Mubea, 2.ABA Automotive, 3.MIKI PULLEY CO., LTD..
Table of Contents
An auto tensioner is a device designed to maintain the correct tension of a chain or belt in power transmission applications. It automates the task of keeping the tension appropriate, hence the name "automatic tensioner." Auto tensioners are crucial in various settings, including in automobile engines and air conditioning systems, playing a significant role in enhancing engine efficiency and reliability.
Auto tensioners automatically adjust to changes in belt tension, which may occur due to stretching or loosening. This automation removes the need for periodic manual adjustments and inspections, thus simplifying maintenance and lowering associated costs. Ensuring proper tension is critical for the efficient operation of the engine and other mechanically driven components.
Auto tensioners are versatile mechanical devices found in belt drive systems across multiple applications:
In automotive engines, belts drive accessories like generators and air conditioning compressors. Auto tensioners ensure these belts maintain the correct tension, critical for the accessories’ optimal operation in sync with engine rotation.
Generators, powered by engines or other mechanisms to generate electricity, rely on belts for power transmission. Auto tensioners keep the generator belt under constant tension, ensuring efficient operation and a stable electricity supply by preventing belt loosening or stretching during extended use.
Belt drives in tractors and combine harvesters, driving components like the mowing unit and grain processing machinery, benefit from auto tensioners. These devices maintain steady drive belt tension, enhancing the stability and efficiency of agricultural operations.
Auto tensioners are used in air conditioners, particularly on the drive belts of compressors, to maximize cooling capacity and regulate indoor temperatures effectively.
Auto tensioners utilize a spring mechanism to maintain the belt at the proper tension. This mechanism, often a compression or torsion spring, adjusts the tension on the belt as needed. When the belt loosens or stretches, the spring mechanism adjusts the force on the pulleys to either increase or decrease tension accordingly, ensuring the belt maintains the designed tension value.
Auto tensioners are categorized into mechanical and hydraulic types, each suited to different applications.
Mechanical auto tensioners use a spring action to manage chain or belt tension. These typically feature two coil springs within the unit, with an idler sprocket or sliding shoe adjusting the chain's slack and tension.
Hydraulic auto tensioners adjust tension through hydraulic pressure, ideal for situations where mechanical types are insufficient, such as in high-load applications causing angular vibration. This type consists of a tensioner pulley and a hydraulic actuator, with the actuator's piston rod movement adjusting the tension through a lever and link mechanism. They are commonly used in automotive engine belts.
*Including some distributors, etc.
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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.
Technokraten LLP has been a manufacturer of testing and inspection equipment since 2010 and is based in Maharashtra, India. The company provides various devices and instruments that are used to measure, test, or evaluate the quality, performance, or characteristics of products, materials, or processes, such as spring wire testing equipment, torque reaction arms, glass bottle cleaning machines, linear welding machines and number marking machines to name a few. It offers its products to the automobile, polymer, chemical, and mechanical industries.
NTN Corporation established in 1918, is a precision machinery manufacturer that researches, develops, and sells bearings and driveshafts (CVJs) based in Japan. Their main products, bearings are essential and precision components that support rotation of machinery. They are used in different types of machinery including automobiles, wind turbines, rolling stocks, and others to support the lives of people around the world. The group has 212 bases in 34 countries around the world (118 sales bases, 72 manufacturing bases, 15 R&D bases, and 7 other bases as of the end of March 2023).
Mubea, also known as Muhr und Bender, was established in 1916, is a manufacturer of automobile products based in Germany. The company specializes in high-strength spring components and related products, and has evolved into a major automotive supplier with its products for chassis, car body, and powertrain, and innovative solutions for lighter vehicles. It develops new products that set international standards and works closely with customers and scientific institutions. With more than 14,000 employees at 50 locations in 18 countries, it operates as an owner-operated family company and has recently expanded its global presence to respond to its customers worldwide.
ABA Automotive has been a manufacturer and supplier of auto parts since 1982 and is based in Ergene-Tekirdag, Turkey. The company is a known tension belt manufacturer with a product list that includes timing tensioners, levers, auxiliary and timing idler pulleys, multi-V belts, and kits. The tension belts consist of components such as pulleys, bearings, bushing, and washers to form a complete belt tension system and are vastly used in automotive, agriculture, defense, and heavy-duty trucks and buses.
RSR Group has been a manufacturer and supplier of automotive products since 1992 and is based in Chennai, India. The company provides water and oil pumps, damper pulleys, clutch plates, valve tappets, cam bush sets, and various other automotive components and equipment required for applications like maintaining optimal performance of the engines, shock-absorbing, reducing emissions, fuel efficiency, valve timing and alignment and numerous other systems and procedures. It serves some of the most known brands in the automotive industry.
Masuma Auto Spare Parts Co. Ltd., founded in 1998 in Tokyo, Japan, is a manufacturer and supplier of passenger car systems and auto parts. The company’s products include car engine systems, chassis systems, electronic control systems, oil maintenance systems, and auto parts which are suitable for many car models all over the world. The company holds ISO-9001, ISO-14001, and SGS IATF16949 manufacturing and quality management certifications, and has established joint ventures in China, Japan, Russia, Central Asia and other regions.
Wenzhou Tinafor Automobile Bearing Stock CO., LTD., founded in 2007, based in Wenzhou, China, is a supplier of belt tensioner and clutch release bearing. The company sells a range of components, including clutch release bearings, central slave cylinders, timing belt tensors, belt tensor pulleys, and belt tensors. The products are made to offer customers in the aerospace, defense, marine, food, and power industries quality, dependable, and environmentally friendly solutions. Additionally, the business provides system solutions, digital printing, graphic design, and engineering support as customer services.
Ranking as of April 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Mubea |
15.3%
|
| 2 | ABA Automotive |
14.1%
|
| 3 | MIKI PULLEY CO., LTD. |
14.1%
|
| 4 | Masuma |
12.9%
|
| 5 | RSR Industries |
12.9%
|
| 6 | Wenzhou Tinafor Automobile Bearing Stock CO.,LTD. |
12.9%
|
| 7 | Technokraten LLP |
9.4%
|
| 8 | NTN Corporation |
8.2%
|
Derivation Method
The ranking is calculated based on the click share within the auto tensioner page as of April 2025. 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.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
Japan
|
2 | 50.0% |
|
India
|
1 | 25.0% |
|
Turkey
|
1 | 25.0% |
79 products found - Page 2
79 products - Page 2
Katayama Chain, Co., Ltd.
130+ people viewing
Last viewed: 7 hours ago
The span box uses a special resin (Material "S") for the chain guide, which is more wear-resistant and durable than steel. Maintenance-free and aut...
Katayama Chain, Co., Ltd.
140+ people viewing
Last viewed: 5 hours ago
The span box uses a special resin (Material "S") for the chain guide, which is more wear-resistant and durable than steel. Maintenance-free and aut...
Titan Japan Co., Ltd.
140+ people viewing
Last viewed: 1 day ago
■Tighten multiple nuts at the same time. Can be used even in difficult work areas A hydraulic tensioner (bolt tensioner) is a device that uses hydr...
Heiwa Jitsugyo Co., Ltd.
70+ people viewing
Last viewed: 1 day ago
The SUS tension sprocket (SUS idler sprocket) is a special sprocket for idlers that has a roller bearing inserted in advance. The shape allows it t...
Katayama Chain, Co., Ltd.
100+ people viewing
KANA Straight Tension allows you to adjust the tension up to 75mm by loosening the M10/M8 wedge nut, turning the moving screw (with M8 hexagon sock...
Yoshikawa Shoko Co., Ltd.
160+ people viewing
Last viewed: 8 minutes ago
5.0 Company Review
Even the standard type can now be used dynamically. If you want reliable strength, we recommend the large type. Wire tensioners are essential for ...
Atlas Copco UK Holdings Ltd
100+ people viewing
Last viewed: 15 hours ago
Standard Response
Safety and high reliability due to accident prevention design ■Summary WTB/WTF tensioners are a series specifically designed to suit all tasks in ...
Atlas Copco UK Holdings Ltd
100+ people viewing
Standard Response
Safety and high reliability due to accident prevention design ■Summary WTB/WTF tensioners are a series specifically designed to suit all tasks in ...
Atlas Copco UK Holdings Ltd
110+ people viewing
Last viewed: 11 hours ago
Standard Response
Safety and high reliability due to accident prevention design ■Summary WTB/WTF tensioners are a series specifically designed to suit all tasks in ...
Atlas Copco UK Holdings Ltd
90+ people viewing
Last viewed: 1 day ago
Standard Response
Safety and high reliability due to accident prevention design ■Summary WTB/WTF tensioners are a series specifically designed to suit all tasks in ...
Atlas Copco UK Holdings Ltd
100+ people viewing
Standard Response
We offer a wide range of high quality and reliable accessories. ■Summary Our safe and reliable bolt tensioner related products provide customers w...
Nord-Lock Group
40+ people viewing
Last viewed: 6 hours ago
Voltite's hydraulic bolt tensioner is a bolting tool designed for bolting on top of equipment. Each tensioner consists of a hydraulic cylinder, bri...
Nord-Lock Group
30+ people viewing
Last viewed: 19 hours ago
Boltite's Typhoon+ was created to address the challenge of bolting connections in limited space on wind turbines. This is a flexible design that as...
SK Maintenance Co., Ltd.
40+ people viewing
Last viewed: 23 hours ago
Fast Response
SH rack wire tensioner.
Japan Pralad Co., Ltd.
130+ people viewing
Last viewed: 13 hours ago
Standard Response
5.0 Company Review
Safe by preventing overstroke. Convenient automatic return spring built-in type. Automatic reset function eliminates the need to return the puller....
9 models listed
Nord-Lock Group
20+ people viewing
The Super Bolt Multi-Jack Bolt Tensioner (MJT) is a revolutionary bolt-and-nut tensioner that uses the world's first technology to make it possible...
Nord-Lock Group
20+ people viewing
Last viewed: 19 hours ago
The Super Bolt Multi-Jack Bolt Tensioner (MJT) is a revolutionary bolt-and-nut tensioner that uses the world's first technology to make it possible...
Nord-Lock Group
40+ people viewing
Last viewed: 1 day ago
■World's fastest automatic piston back function It is not uncommon for some bolt tensioners to have a spring return function that automatically ret...
