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This section provides an overview for bolt & stud tensioners as well as their applications and principles. Also, please take a look at the list of 7 bolt & stud tensioner manufacturers and their company rankings. Here are the top-ranked bolt & stud tensioner companies as of March, 2026: 1.SPX Flow, 2.HYTORC, 3.RIVERLAKE.
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Categories Related to Bolt & Stud Tensioners
Hydraulic bolt tensioners are hydraulic tools used to tighten bolts using oil pressure (hydraulic pressure).
Hydraulic bolt tensioners generate a tensile load without applying torsional torque to the bolt, thus maximizing the bolt's material strength as a fastening force. Another feature of the bolt tensioner is that it can directly adjust the axial force (axial force value control) to precisely tighten the bolt.
Hydraulic bolt tensioners are used in manufacturing and industrial applications where the durability of large bolts is more important than ever, due to their ability to precisely tighten bolts. For example, wind turbine generators (propellers) on the ocean, chemical plant factories, and other sites that require high-precision bolt tightening and durability.
Furthermore, the hydraulic bolt tensioner is indispensable in the tightening of bolts with high precision and durability for giant structures such as the Tokyo Sky Tree. In addition, hydraulic bolt tensioners take up less space when fastening than conventional torque wrenches, so they can be used in tight spaces, such as between complex structures.
Fastening bolts with hydraulic bolt tensioners offers the following advantages:
As explained in the principle section, when torsional torque is applied to a bolt, the bolt elongates or breaks due to plastic deformation at a lower tension than when tension alone is applied. Only a lower fastening force can be obtained than the bolt's material strength.
In contrast, the hydraulic bolt tensioner does not exert torsional torque on the bolt, so high fastening force can be obtained.
When a bolt is fastened by rotating an ordinary bolt or screw, the fastening force (axial force) generated by the bolt is not known. However, when determining the axial force from the tightening torque, the coefficient of friction of the bolt's thread surface and seat surface must be known.
It is difficult to accurately determine the coefficient of friction, and it is common practice to use a surrogate value. If there is a large difference between the coefficient of friction used in the calculation and the actual coefficient of friction as a surrogate value, problems can occur, such as insufficient axial force or bolt breakage during fastening operations. With the hydraulic bolt tensioner, the axial force applied to the bolt can be accurately determined from the hydraulic pressure applied.
Since hydraulic bolt tensioners use hydraulic pressure, the same axial force can be applied to multiple bolts simultaneously by supplying a single source of hydraulic pressure to multiple hydraulic bolt tensioners.
How to fasten with hydraulic bolt tensioners
Hydraulic bolt tensioners start by tightening a nut on a bolt by hand or with a torque wrench in the usual way. Then set the hydraulic bolt tensioner in this state and seat the bolt on the seating surface.
Next, a high-pressure hose is attached to the side of the hydraulic bolt tensioner to apply hydraulic pressure, and the pressure can be set according to the conversion table. The pressure setting can also be converted from the initial required tensile force of the bolt and the effective cross-sectional area.
When pressure is gradually applied with the high-pressure hose connected, the hydraulic pressure pulls the bolt upward and the seated nut floats. By turning this floating nut, the bolt is tightened with several tons of force. After the nut has been turned, the hydraulic pressure is released and the bolt is tightened.
*Including some distributors, etc.
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HYTORC, established in 1968, is a manufacturer based in the United States, specializing in the production of bolting systems, including pneumatic, hydraulic, and electric bolting systems. The company’s products cater to a wide range of industries, including steel mills, mining equipment, refineries, power plants, and wind turbines. With an experienced engineering team, it continues to develope solutions for every bolting application imaginable for custom projects. Its latest product line features patented industry-firsts like hands-free operation to keep tool operators at a safe distance from the application, onboard documentation systems to provide job accountability and assurance, and more.
Snap-on Incorporated, founded in 1920, is an American designer, manufacturer and marketer of high-end tools and equipment for professional use in multiple industries. The company’s product lines include hand tools, power tools, automotive diagnostics and shop equipment, automotive diagnostics software and other solutions for the transportation service, industrial, government, education, agricultural, and other commercial applications. Products are sold through its franchise dealer van, company direct sales and distributor and Internet channels. Now, it is a $3.7+ billion S&P 500 company headquartered in Kenosha, Wisconsin and employs approximately 12,200 people worldwide.
Nord-Lock Group, established in 1982 and headquartered in Sandviken, Sweden, is a manufacturer and supplier of wedge-locking technology for bolted joints. The company offers a comprehensive range of products, including Nord-Lock washers to secure bolted joints against loosening in extreme conditions, Boltight washers for high-pressure applications, Expander washers to prevent bolt hole stripping, Torque limiters to prevent over-tightening, and Thread repair inserts for fixing of damaged or worn threads. They cater to diverse industries seeking durable and dependable joint fastening solutions.
RIVERLAKE, established in 2005, based in Taizhou, China, is a manufacturer and supplier of high-force hydraulic tools. The company manufactures a wide range of hydraulic cylinders, pumps, bolting tools, flange maintenance tools, pullers, and other hydraulic tools. Their products and services are used in projects including bridge construction, highway, pipeline construction, railway construction, and heavy lifting, among others. The company has provided services to over 2000 industrial and mining companies. The company employs well-trained engineers and sales representatives who provide excellent customer service and tools.
SPX Flow, established in 1912, is a manufacturer of industrial machinery to solve processing challenges based in Charlotte, North Carolina. The company manufactures various machinery such as mixers, pumps, valves, homogenizers, and heat exchangers. The machinery is used in nutrition, health, mining, construction, and chemical industries. The company provides services such as designing, engineering, and installing turnkey process units or full-scale plants. The SPX Flow brands include Anhydro, Bran+Luebbe, Gerstenberg Schrӧder, Pneumatic Products and Seital Separation.
Ranking as of March 2026
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | RIVERLAKE |
20.8%
|
| 2 | HYTORC |
20.8%
|
| 3 | SPX Flow |
20.8%
|
| 4 | TRITORC, Inc. |
8.3%
|
| 5 | Hydraulics Technology, Inc. |
8.3%
|
| 6 | FASTORQ |
8.3%
|
| 7 | Nord-Lock Group |
8.3%
|
| 8 | Torq/Lite |
4.2%
|
Derivation Method
The ranking is calculated based on the click share within the bolt & stud tensioner page as of March 2026. 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
|
4 | 66.7% |
|
Sweden
|
1 | 16.7% |
|
China
|
1 | 16.7% |
58 products found - Page 2
58 products - Page 2
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