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Tensioner Product List and Ranking from 13 Manufacturers, Suppliers and Companies

Last Updated： Aggregation Period:Dec 31, 2025～Jan 27, 2026
This ranking is based on the number of page views on our site.

Tensioner Manufacturer, Suppliers and Company Rankings

Last Updated： Aggregation Period:Dec 31, 2025～Jan 27, 2026
This ranking is based on the number of page views on our site.

  1. トルテック 本社 Osaka//Industrial Machinery
  2. VALQUA TORQUE SYSTEM CO., LTD. Aichi//Industrial Machinery
  3. 日本プララド Hyogo//Industrial Machinery
  4. 4 ノルトロックジャパン Osaka//Ferrous/Non-ferrous metals
  5. 4 FIRSTEC CORPORATION Osaka//Machine elements and parts
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Tensioner Product ranking

Last Updated： Aggregation Period:Dec 31, 2025～Jan 27, 2026
This ranking is based on the number of page views on our site.

  1. Basic Bolt Tensioner 'PD Series/BR Series' トルテック 本社
  2. Bolt tensioner トルテック 本社
  3. Wind Turbine Dedicated Bolt Tensioner 'WTB' VALQUA TORQUE SYSTEM CO., LTD.
  4. Bolt tensioner for underwater bolt tightening, SUBSEA type 日本プララド
  5. 4 Standard Bolt Tensioner 'CTST' VALQUA TORQUE SYSTEM CO., LTD.

Tensioner Product List

16～30 item / All 31 items

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High-precision bolt tensioner and axial force management tool | Japan Prarad

High-precision bolt tensioner and axial force management tool | Japan Prarad

High-precision axial force management tool for large bolts from M20 to M300. Allows simultaneous parallel tightening of bolts, ensuring uniform tightening without variation in axial force!

- Supports large bolt tightening from M20 to M300. (Custom production possible from M16.) - Multiple bolts can be tightened simultaneously and uniformly in parallel by connecting bolt tensioners. The tightening axial force is uniform, preventing uneven tightening of flanges. (There is a record of simultaneously tightening 40 flange bolts in parallel.) - Bolts are pulled using hydraulic force, applying tensile load for tightening, which eliminates the influence of friction with the thread surface and seating surface. "Axial force can be managed directly," allowing for more accurate tightening through axial force management than torque management. - Features our unique ArmorMax protection with a super-hard surface finish. Excellent durability, wear resistance, and corrosion resistance maximize the lifespan of the tool. - The compact and lightweight bolt tensioner allows for bolt tightening even in confined spaces. Custom production is also possible. - Since the bolts are not twisted, there is no generation of friction heat, preventing galling between the nut and flange surface and seizing of the threaded parts. <For inquiries about purchasing or renting bolt tensioners> Please contact us for free demos, quotes, and material requests. Nihon Purarado Co., Ltd. TEL: 078-967-3556

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  • Torque wrench
  • Hydraulic Equipment

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Multi-stage bolt tensioner (for wind power generation) - Nippon Pralado

Multi-stage bolt tensioner (for wind power generation) - Nippon Pralado

In addition to bolt tightening work for wind power generation, this is a slim large bolt tightening axial force management tool that can be used in narrow spaces, suitable for M24 to M64 sizes. It features a built-in automatic return spring for added safety.

■ Equipped with an automatic return spring to prevent forgetting to reset to zero, ensuring safety and improving work efficiency by eliminating the need to return the puller to zero stroke each time. ■ The two-stage piston design makes the main body slim, suitable for tightening bolts in narrow spaces, and delivers high tension for tightening force. ■ The gearbox is designed for quick nut seating with a ratchet wrench. ■ Long lifespan, designed for a minimum of over 10,000 pressure cycles. ■ The drive socket features a spring-loaded snap-down structure for quick installation onto the nut. ■ No alignment is needed when attaching to the nut. ■ A tightening tool for axial force suitable for narrow space blade bolt tightening, nacelle frame bolts, hub bolts, and foundation anchor bolts for offshore and onshore wind power construction. ■ Also effective for tightening large bolts from M24 to M64 for applications other than wind power. <For inquiries regarding the purchase or rental of bolt tensioners> Please contact us for free demos, quotes, and material requests. Nihon Purarado Co., Ltd. TEL: 078-967-3556

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  • Torque wrench
  • Hydraulic Equipment

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Bolt tensioner for wind turbines "GR LD Series"

Bolt tensioner for wind turbines "GR LD Series"

Bolt tensioner specially designed for bolt tightening applications in the wind power generation industry.

A bolt tensioner specially designed for blade/tower bolt applications. With a two-stage cylinder that operates at a maximum of 1500 bar, it allows for a small outer diameter, making it capable of meeting the requirements of almost all applications. This long-life model uses ultra-high-strength steel and features the most reliable state-of-the-art gear rotation system on the market. It is equipped with a positive stop function to prevent over-stroking and a safety flight prevention feature certified by SGS in case the puller is damaged.

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Underwater operation / Subsea tensioner

Underwater operation / Subsea tensioner

A solution specialized for underwater applications, coated with highly corrosion-resistant nickel plating.

The sub-tensioner is designed to fit high-pressure seals made from proprietary composite materials and can be installed directly without any adjustments. <Main Benefits> ● Completely prevents oil leaks with in-house developed high-strength seals ● High corrosion resistance due to nickel plating ● Compatible with all standard pipe flanges ● Surface is treated for slip resistance, making it easy to handle ● Comes with detailed operation manual, maintenance manual, and safety manual

  • bolt

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TSR+ Auto Return Tensioner

TSR+ Auto Return Tensioner

High-speed, simple, safe, and highly precise operation achieved with an auto-return tensioner.

◆Implementation of the industry's fastest automatic piston return function Equipped with a super-strong spring, it returns to its original position at four times the speed of conventional products, completely eliminating the need for manual operation. This tensioner combines reduced work time, simple operability, work surface safety, and robustness. >>Features Reliability that prevents performance degradation of the tensioner A safety valve prevents over-stroking due to excessive pressure, protecting against seal blowouts and exposure of operators to discharged oil. It features a unique surface treatment technology that maintains its effectiveness even in harsh environments over the long term. Improvements in sealing technology enable high-performance performance through high-cycle usage.

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Basic Bolt Tensioner 'PD Series/BR Series'

Basic Bolt Tensioner 'PD Series/BR Series'

A tensioner that makes the complex task of tightening foundation bolts easier and takes safety into consideration.

In the wind turbine assembly project, tightening the foundation bolts is one of the most complex tightening tasks. Factors such as dirt, misalignment, rust, elongation control, and oil return speed complicate bolt tightening and can lead to assembly errors. The tensioners in this series are designed to facilitate the tightening of foundation bolts while also considering safety. 【Key Features】 ■ PD Tensioner ● Safety: Incorporates safety features similar to those of blade tensioners. ● Slim Design: The double-decker type guarantees high loads with limited radial clearance. ● Laser-etched Scale: Allows for easy control of elongation. ● Gearbox: The most reliable gearbox, enabling the fastest oil return to avoid unnecessary time wastage. ● Optimized Design: Achieves high loads with a small diameter, suitable for applications in limited space. ■ BR Tensioner ● An ideal solution for applications with significant bolt protrusion or unique thread types. ● Maximum stroke of 10-20mm. ● High-pressure quick-connect coupler that does not require O-rings.

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Tape Tensioner (with certificate) PI-TS-050C

Tape Tensioner (with certificate) PI-TS-050C

When measuring the outer diameter with tape, it is necessary to pull, so using a tensioner makes it easy and accurate to apply tension.

When measuring the outer diameter with a pipe tape, it is necessary to pull it moderately so that the tension of the pipe tape reaches 2.25 kg; therefore, using a tensioner makes it easy and accurate to measure.

  • Inspection fixture

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Hydraulic Tensioner "Boltight"

Hydraulic Tensioner "Boltight"

General fastening components are available! Improve repetitive fastening tasks such as piping connections on a low budget.

"Voltite" is a tool that completes fastening by creating a pre-tightened state through controlled hydraulic tensioning of the bolt shaft, seating the nut, and then releasing the hydraulic pressure. By equalizing the compression applied to the joined components through hydraulic means, it is possible to fasten the flange joint surfaces with uniform force, preventing leaks. As a hydraulic tool using a tensioning method, the only remaining component after work is a standard nut, making it very effective for safely and reliably tightening multiple large-diameter bolts while keeping the cost of the components low. 【Features】 ■ Hydraulic tensioner that allows simultaneous and uniform tightening of multiple large-diameter bolts ■ Enables fastening without leaks by applying uniform pressure to the flange surfaces simultaneously ■ Uses standard fastening components, improving repeated fastening tasks such as piping connections on a low budget ■ Compact, lightweight, highly durable, with excellent workability and safety *For more details, please refer to the related links or feel free to contact us.

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[Technical Information] The Mechanism of Super Bolts and the Principle of Preventing Breakage

[Technical Information] The Mechanism of Super Bolts and the Principle of Preventing Breakage

A bolt tensioner that can be tightened with just hand tools! A bolt that ensures reliable axial force.

This document introduces the reduction of the risk of fracture for super bolts. It explains the causes of fracture in large-diameter bolts and provides a detailed explanation of the process of generating axial force in super bolts and the absence of torsional stress. Our company has a dedicated support department. Please make use of it for product selection. [Contents] ■ What is a super bolt ■ Main causes of fracture in large-diameter bolts ■ Reducing fracture risk with super bolts ■ Summary *For more details, please refer to the PDF document or feel free to contact us.

  • bolt

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Airbag Bolt Tensioner "AB"

Airbag Bolt Tensioner "AB"

Tension tightening that is not affected by twisting or friction! Transmits axial force to the bolt more accurately and reliably.

The "AB" is a tool equipped with an air-back function that automatically retracts the piston as the pressure is released, by pre-filling air into a bolt tensioner capable of advanced axial force management. It has a strong body that can withstand harsh job sites and is easy to maintain. By combining various load cells with different plumb bars and bridges, it accommodates a wide range of sizes. 【Features】 - Tensioner with air return function - Pulls up the bolt with high-pressure hydraulic force while tightening the nut - Enables efficient work - Corrosion-resistant body - Compatible with M20 to M100 in six types *For more details, please refer to the PDF document or feel free to contact us.

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  • bolt

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Hydraulic Bolt Tensioner for Power Generation Systems PGT/FTR/FTE Series

Hydraulic Bolt Tensioner for Power Generation Systems PGT/FTR/FTE Series

For tightening work of wind power, steam, and gas turbines, as well as for securing the foundations of wind power generation towers! You can choose according to your application.

The "PGT Series" is a hydraulic bolt tensioner designed for high-precision tightening operations of wind, steam, and gas turbines. The "FTR Series" hydraulic bolt tensioner is specially designed to apply tension to the foundation bolts of wind turbines. Additionally, the oval-shaped hydraulic bolt tensioner "FTE Series" is specifically designed for securing the foundations of wind power generation towers. We also offer hydraulic bolt tensioners for power generation systems and foundations. 【Features】 ■ PGT Series - Designed for high-precision tightening operations of wind, steam, and gas turbines ■ FTR Series - Specially designed to apply tension to the foundation bolts of wind turbines ■ FTE Series - Specially designed for securing the foundations of wind power generation towers - High-precision tightening operations result in less frequent maintenance *For more details, please refer to the PDF document or feel free to contact us.

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Case: Removal of studs from a stacker reclaimer with hydraulic tensioner.

Case: Removal of studs from a stacker reclaimer with hydraulic tensioner.

A case of developing a hydraulic tensioner to safely and timely remove studs!

Removing a 3-meter-long stud from the bucket wheel drive output of a Sandvik stacker reclaimer is a difficult and time-consuming task. In previous operations, it took over 10 hours to remove each stud, and a maximum force of 120 tons was required to push or pull a total of 16 studs. To safely and promptly remove the studs, a custom GT4 hydraulic tensioner was developed. The tensioner extracts each stud in about 30 minutes, significantly saving time for the maintenance team. [Case Overview] ■ Customer: Port Walarta Coal Services (Australia) ■ Product: Custom GT4 Hydraulic Tensioner, ZUTP1500E ■ Result: Significant time savings for the maintenance team *For more details, please refer to the PDF document or feel free to contact us.

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Adjustment Fitting | CTB Tensioner

Adjustment Fitting | CTB Tensioner

Stepless adjustment is possible even at full load.

● Ideal for clean rooms due to the sealed adjustment unit and excellent cleanability ● High corrosion resistance due to the use of AISI 318LN duplex stainless steel ● Stepless adjustment according to scale even at full load ● Slim design with removable ball lock pin ● Twist prevention device ● Food-grade grease

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Bolt tensioner

Bolt tensioner

Tighten accurately to prevent galling and seizing of the threaded part.

The bolt tensioner allows for precise tightening by directly applying axial force to the bolt, regardless of the friction coefficient. Since accurate tightening force can be achieved, galling between the nut and flange surface, as well as seizing of the threaded part, does not occur. 【Features】 ○ Enables precise and uniform tightening ○ Prevents seizing of the threads ○ Simple and straightforward structure *For more details, please download the catalog and feel free to contact us. *Specifications and detailed information can be found in the catalog.

  • Hydraulic Equipment
  • Pipe Fittings

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"Super Bolt": Tightening large-diameter bolts with a single torque wrench.

"Super Bolt": Tightening large-diameter bolts with a single torque wrench.

An innovative product that can tighten huge bolts and nuts that cannot be tightened by human strength with just one torque wrench.

A mechanical bolt tensioner developed in 1984 at the request of US Steel, the largest steel company in the United States. By distributing the enormous torque required to tighten large-diameter bolts into smaller torque, it dramatically improves work safety. It also achieves remarkably accurate fastening force, allowing for work in high and confined spaces without issues. The use of electric tools and air tools further reduces work time, dramatically shortening downtime caused by operations and enabling low-cost operations. 【Features】 ■ Incredible axial force accuracy due to patented structure (over three times the accuracy of conventional methods) ■ Large-diameter bolts can be fastened with just one torque wrench ■ Does not depend on the skill of the operator, ensuring accurate fastening force regardless of who performs the work ■ Exceptional axial force stability prevents loosening even under intense vibrations ■ Strong against loosening that does not involve reverse rotation during thermal cycles, thanks to elastic fastening ■ Usable without issues in confined and elevated spaces *For details, please refer to the catalog or contact Nord-Lock Japan. *Beware of imitation products that resemble the appearance. They do not have equivalent functions due to patented technology. Nord-Lock Japan also provides various technical support. Please feel free to consult us.

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