This section provides an overview for tensioners as well as their applications and principles. Also, please take a look at the list of 81 tensioner manufacturers and their company rankings.
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Tensioners are adjustment devices used to prevent slack in drive chains and belts.
Tensioners provide constant tension to the chain or belt, preventing it from falling off, damaging peripheral parts, or deteriorating transmission efficiency due to slack.
Tensioners are combined with sprockets and chain guides for chains and pulleys for belts to prevent resistance to rotation. They are broadly classified into two types: those that adjust the tension on a case-by-case basis and those that automatically adjust the tension to an appropriate level.
Tensioners are mainly used to adjust the tension of automobile fan belts, air conditioner belts, and timing chains.
Since fan and air conditioner belts are made of rubber, they stretch during use. If left unchecked, this can result in high-frequency noise due to belt slippage, inadequate alternator power generation due to deteriorated transmission efficiency, and insufficient cooling of the air conditioner. Providing tension with a Tensioner can solve these problems.
Also, by limiting the range of motion of the tensioner, it is possible to determine the limit of belt/chain elongation when slack occurs, even after adjusting the tensioner to its maximum value.
There are two main belt tensioners: manual and automatic, that use hydraulic pressure or spring tension.
In the case of manual tensioners, the pulleys and gears are pulled up (or pushed down) with bolts and nuts to adjust and fix the belt to the desired tension, and they have the advantage of being less expensive than automatic tensioners.
In the case of the automatic type, the tension is automatically adjusted to an appropriate level at all times by hydraulic pressure or spring tension. This saves maintenance time and is used to adjust parts such as timing chains that are not exposed to the outside and cannot be adjusted easily.
In addition, those that incorporate a hydraulic anti-return mechanism have the advantage of minimizing tension changes due to hydraulic pulsations.
When manually adjusting the tensioner, operator error can cause noise due to insufficient tension or belt breakage due to over-tensioning, so care must be taken when changing the tensioner.
Auto tensioners do not have these concerns, but they have many disadvantages in terms of cost. Many parts, such as chain guides and pulleys, must be replaced simultaneously when replacing the tensioner. If the tensioner is removed when the belt or chain is replaced, it cannot be reused if it has an anti-return mechanism (it is stretched to the limit and will not return). There are many disadvantages in terms of cost.
*Including some distributors, etc.
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Larsen Packaging Products is headquartered in Saint Charles, Illinois. Larsen Packaging Products manufactures and distributes packaging products. Larsen Packaging Products box manufacturing techniques include high speed 2 color rotary die-cutter, high speed 2 color mini flexo/gluer, 2 color flexo/folder/glouer, high speed gluing, stiching, in-line taping, jumbo lineal feeed press, and specialty folder gluing. Box offerings include custom boxes based on standard and e-commerce designs such as self-erecting sex corner tray, full telescope design style container, half slotted container, and more.
Mädler North America was founded in 2020 as the US-based subsidiary of Mädler which was founded in Berlin, Germany in 1882. Mädler specializes in manufacturing precision-made machine parts. Product lines include linear guides, bearings, bushes, bevel gears, worm wheels, castors and wheel systems, couplings, fastening elements, clutches, gear boxes, idlers, linear bearings, locking assemblies, machine mounts, elements for pneumatic machines various joints, rubber padding and dampers, splined shafts and hubs, sprockets, timing belts, spindles, adhesives, sealants, and other assorted accessories.
International Crystal Laboratories, ICL, was founded in 1962 and is based in Garfield, New Jersey. ICL serves the spectroscopy, applied spectroscopy, and analytical chemistry industries and end users. ICL’s product categories include transmission windows & optics, FTIR calibration films, sample cards, powders, cuttings, IR, UV, optical spectroscopy sampling, laboratory presses, die sets, laboratory supplies, and spectro-optic lab supplies. Examples of ICL’s products include circular disks, magneto crystals, crystal cuttings for grinding, Gemini FTIR gas analysis cells, liquids, and solids, polishing kits, and laboratory grinding mills.
Riverside Paper Company was founded in 1973 and is headquartered in Miami, Florida. Riverside Paper Company is a distributor of shipping, packaging, and maintenance products to customers in Florida as well as nationally and internationally. Riverside Paper Company’s product listings include a full range of packing materials, materials for packing and handling, industrial packing, mailing, and miscellaneous supplies. Riverside Paper Company also has trained product specialists to assist customers with shipping and packing information to save on time and cost.
Rockwell Automation, Inc. was founded in 1903 and is headquartered in Milwakee, WI. Rockwell Automation provides industrial automation and digital transformation solutions around the world. Rockwell Automation operates through their intelligent devices, software & control, and lifecycle services segments with both hardware and software products and services. The Intelligent Devices segment offers drives, motion, safety, sensing, industrial components, and configured-to-order products. The Software & Control segment provides control and visualization software and hardware, information software, and network and security infrastructure solutions. The Lifecycle Services segment provides consulting, professional services and solutions, and connected and maintenance services through independent distributors.
Stephens Manufacturing was started in 1957 in Tompkinsville, Kentucky. Stephens is a manufacturer and distributor of concrete-related equipment. Categories include ready mix plants, precast plants, central mix plants, RCC, environmental, and material handling. Ready mix batch plants that generally have quicker installation. Precast plants are custom built. Portable mixers mix RCC and other mixes. Environmental components include dust collectors, reclaimers, and wash down racks. Material handling includes batchers, bins, hoppers, silos, conveyors, and vertical pigs. Stephens offers assistance in customer problem solving and delivers to customers globally.
Suncor Stainless, Inc. is based in Plymouth, Massachusetts. Suncor Stainless serves the industrial, marine, architectural, commercial, government, and OEM markets as a manufacturer of stainless steel hardware and components. Suncor Stainless is ISO 9001:2015 certified. Suncor Stainless’s services include custom stainless steel manufacturing, product testing and quality assurance, strength testing, metal content testing, custom webbing, custom stainless steal chain assemblies, custom threading, machine swaging, corrosion resistance testing, and retail packaging. Suncor Stainless also supplies numerous components such as sheaves, hooks, and clips.
Lexco Cable began in 1952 in Chicago, Illinois. Lexco Cable is a leading manufacturer of wire rope, cable, and bungee cord assemblies and is ISO 001 certified. Lexco has built products to specification for military, Boeing, federal use, NSN specifications, and ASTM standards. Lexco offers wire rope, wire rope fitting, hardware & tools, architectural cable railings, push-pull controls, and bungee cords. All rope and cord products are available in different varieties. Custom assemblies and guides are also available.
Metro Hydraulic Jack Co. is a third-generation family run business in operation since 1941. MHJ is based in Newark, NJ. MHJ distributes hydraulic jack-related equipment, tools, and parts including a broad range of cylinders, motors, valves, presses, couplings, tools, hydraulic fittings, hoses, jacks, pumps, lifts, lubrication equipment, pallet stackers, scissor lifts, and workholding devices. MHJ also offers system design services as well as engineering services and extensive repair including testing, retrofitting, and overhauling.
Cardinal Carryor was founded in Lexington, Kentucky and is now based in Louisville. Cardinal Carryor is a distributor specializing in mobile material handling equipment sales, rental, and service. Cardinal Carryor’s equipment offerings include forklifts, forklift attachments, forklift batteries and battery chargers, industrial sweepers and scrubbers, automated guide vehicles, and equipment parts and accessories. Cardinal Carryor’s service options include mobile battery cleaning, rebuild, and repair, rental equipment services, training, and battery planned maintenance options.
Traffic Safety Warehouse is based in Deerfield, Illinois. Draffic Safety Warehouse is a wholesale direct marketer of traffic safety, work zone safety, pedestrian safety, crew safety, crowd control and other products, mostly made in the USA. Traffic Safety Warehouse generally serves other distributors, construction companies, utilities, educational intuitions, and municipal governments. A few examples of products include numerous types of barricades, facility safety devices, lights, parking lot safety, and work zone safety accessories.
New Day Packaging Products was founded in 1989 as a division of T & H Sales Inc. New Day Packaging designs and manufactures packaging and inventory management services. New Day Packaging products include cushioning material, tapes, fasteners, films, paper wraps & tissue, boxes, janitorial supplies, and safety products. Custom packaging solutions include general capabilities of design and distribution, full packaging materials and container styles, creation services, custom specifications, secondary services such as labeling and validating, and production volume.
SupplyOne was founded in 1998 and is a manufacturer, distributor, and service provider for custom packaging products. SupplyOne strives to maximize use of renewable, recycled, or recyclable sources, with a current rate of 95%. SupplyOne products included corrugated material, flexible packaging, food packaging, labels, miscellaneous consumables, operating supplies, packaging equipment, packaging supplies, plastic thermoformed products, safety supplies, and shipping supplies. Service programs include the packaging management program, managed services program, food packaging program, on-site management program, as well as various other retail store services.
Hassel Materials Handling Co. was established in 1968 and is a distributer for material handling solutions. Hassel Materials Handling product lines include “carts & trucks” such as picking carts and shelf trucks, “cranes, hoists & crane accessories” such as jib cranes and chain hoists, “ergonomic products” such as industrial seating and antifatigue matting, “gravity & power conveyors” such as gravity conveyors and plastic belt conveyors, “loading dock equipment” such as dock lights and hoppers, “security & wall systems” including guard rails and post protectors, “shop equipment” such as workstations and welding reels, and “storage products” such as workbenches.
Dot Systems was founded in 1979 and operates out of Dayton, Ohio. Dot Systems is a distributor of packaging supplies, machines, and tools. Dot Systems products include mailers, poly bags, stretch film, tape, VCI paper, packaging list envelopes, staples, staplers, adhesives, labels, plastic & steel strapping, bubble, foam, loose fill, packaging equipment, corrugated boxes, various packaging solution including foams, and pads. Additionally, machinery such as stretch wrappers, palletizers, automatic vehicle guidance machines, strapping machines, and stretch wrap machines are available for sale and service.
Pooley Inc. was founded in 1932 by Samuel H. Pooley as a custom fabrication conveyor belt shop in Western New York State. Pooley manufactures, distributes, and services industrial machines, supplies, and components. Pooley’s product offerings include power transmissions, industrial supplies, conveyor belting & accessories, and other industrial supplies. In addition, Pooley offers services including conveyor belting, and hose assemblies among others. Additionally, Pooley can perform liaison purchasing on behalf of customers for products not usually held in stock.
Westerfield Sales and Services (Westerfield) was founded in 1946 in Old Brooklyn, Ohio. Westerfield is stocking caster distributer. Westerfield’s online store offers casters of a number of materials and styles including iron, hard rubber, phelonic, pneumatic, carefree, rubber, polyurethane, TPR, ductile steel, and poly on poly Westerfield also stocks other equipment such as E-tracks, straps, dollies, rubber bands, E-track load bars, furniture dolly carpet ends, hoop kits, tie offs, load bars, panel carts, platform trucks, pry bars, and shelf carts.
R. P. Crawfard Co., Inc. began in 1962 in Pittsburgh, PA. RPC primarily develops and sells industrial products but also sells and promotional and consumer products. Industrial product lines include pallet racks and other material handling equipment, warehouse equipment including platforms and production tables, and storage shelving. Promotional and consumer products include apparel with and without logos, technology-related products, backpacks, bags, and coolers, pens and markers, drinkware, flags, and umbrellas.
W.C. DuComb Company was founded in 1915 in Detroit, Michigan, where it still operates. W.C. DuComb Company is a stocking distributor of bearings, popwer transmission, and. Linear motion products, electric motors, and VS drives. W.C. DuComb Company serves industries such as conveyor and machinery OEMs, industrial processors, machine rebuilders, wastewater, sand & gravel, tool & die, steel, metals, and scrap. W.C. DuComb Company product offering lines include accessories, bearings, belts, belting, electrical, linear motion, lubricants & sealants, power transmission, and sealing solutions.
Central Diesel, Inc was founded in 1972 by Martin R. Wittersheim and is located in Richmond, Virginia. Central Diesel is a distributor of marine, construction, mining, rental, industrial, military, state government, federal government, transportation, and agriculture industries. Central Diesel product categories include diesel engines, diesel engine electrical components, diesel engine filtration systems, diesel engine maintenance & repair, diesel engine turbocharger assemblies, diesel exhaust systems, fuel injection systems & parts, generators, and hydraulic hoses & fittings.
Kinequip, Inc. was founded in 1946 in Buffalo, NY as a distributor of industrial parts, accessories, and kits. Today these offerings have grown to include motors, compressors, blower systems, clams, pumps, various fittings, gauges, and sensors, as well as pneumatic and high-pressure devices. Kinequip also serves as a distributor for individual device and parts manufacturers. Kinequip additionally offers custom-designed solutions ranging from R&D to unique components and special-made parts, as well as value added designs on demand.
Lancaster Packaging was founded in 1989 and operates out of Hudson, Massachusetts. Lancaster Packaging is a national wholesale distribution & purchasing company providing vendor and supply chain management services. Lancaster Packaging’s line of Fast Packs feature standard sizes that meet government specifications. Models are available with a variety of die-cut foam inserts and flexible polyurethane foam for protection of shipped products. Additional services include requisition processing, tracking & reporting, sourcing, national wholesale distribution quoting, and invoicing bill pay solutions.
Kyana Packaging Solutions was founded in 19776 and operates in Louisville, Kentucky. Kyana Packaging Solutions is a market provider of smart solutions in packaging design and productivity improvements. Kyana’s iPAR Process, which stands for innovative Packaging Accelerating Results Process. iPAR is a service that helps clients identify problem areas both known and unknown, increase profitability, increase responsiveness to customer feedback, increase options for customer strategies, and provide leading-edge solutions for clients’ individual business situations. Kyana’s ASR Soultions assists clients with third party and reverse logistics, kitting assembly, custom manufacturing, marketing promotions, and metal stamping.
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.
Dunham Rubber & Belting Corp. (DRB) has been in operation since 1965 and is based in Greenwood, Indiana. DRB offers a variety of products and services, including conveyor belts and accessories, hydraulic hose and fittings, industrial hose and fittings, sanitary hose and fittings, material handling and ducting, sheet rubber and gaskets, UHMW, polycarbonate, and acrylic sheets, as well as supplies for the egg processing, brewery, distillery, and winery industries. In January of 2023, DRB was acquired by Belt Power, an independent distributor and fabricator of conveyor system components.
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.
Associated Bag is headquartered in Harrisburg, Pennsylvania. Associated Bag is a bag and shipping product distributor with 4 distribution centers across the United States. Associated Bag Products include anti-rust & anti corrosion bags, boxes, bubble & cushioning, business envelopes & mailers, dispensary products, document & media protectors, eco-friendly products, food service & packaging, gloves, industrial & shipping supplies, janitorial supplies, liners & covers, personal protection, retail packaging, sealed air, tapes & adhesives, ties & sealers, tools & equipment, tubing, VCI products, vinyl, zipper bags, and more.
MISUMI USA is the American subsidiary of MISUMI. MISUMI provides engineering resources for a variety of industries including automotive, medical equipment, consumer packaging, and semiconductor. MISUMI is both a manufacturer and distributor. MISUMI offers over 20 million total parts. Product categories include automation components, fasteners, materials, wiring components, electrical & control products, cutting tools, tools & accessories, material handling & storage, safety & general supplies, lab & clean room supplies, press die components, plastic mold components, and injection molding components.
SERVICE COMPANY was founded in the 1930s in Pittsburgh, Pennsylvania. Today BEARING is a manufacturer and national distributor of bearings and power transmission parts and components. BEARING offers services such as field service inspections, damage analysis, surveys, reverse engineering, repair, part identification, and selection. BEARING parts include seals, gaskets, accessories, couplings, electric motors, gearboxes & gearing, chains, sprockets, belts, sheaves, material handling equipment, linear motion equipment, lubrication, and, naturally, many varieties of bearings.
Abatix was established in 1983 and has offices across the United States. Abatix is a distributor of products for the general construction, industrial safety, petrochemical, energy, environmental, hospital, fire and water restoration, and disaster response industries. Abatix product offerings include abrasives, adhesives, tapes, building material & hardware, chemicals, lubricants, electrical, fall protection, gloves, hand tools, janitorial & facilities maintenance, jobsite supplies, material handling, personal protective clothing, poly sheeting, bags, power tools, restoration & environmental equipment, safety equipment, signs, tags, labels, test equipment & instrumentation, and welding & soldering.
Ranking as of March 2023 in United States of AmericaDerivation Method
Derivation MethodThe ranking is calculated based on the click share within the tensioner page as of March 2023. 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
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