Tensioner Product List and Ranking from 9 Manufacturers, Suppliers and Companies

Last Updated： Aggregation Period:Jan 07, 2026～Feb 03, 2026
This ranking is based on the number of page views on our site.

Tensioner Manufacturer, Suppliers and Company Rankings

Last Updated： Aggregation Period:Jan 07, 2026～Feb 03, 2026
This ranking is based on the number of page views on our site.

  1. 池田金属工業 Osaka//Building materials, supplies and fixtures manufacturers
  2. 日本プララド Hyogo//Other construction industries
  3. ノルトロックジャパン Osaka//Building materials, supplies and fixtures manufacturers
  4. 4 アンタック Aichi//Building materials, supplies and fixtures manufacturers
  5. 5 マツダ金属製作所 Osaka//Building materials, supplies and fixtures manufacturers
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Tensioner Product ranking

Last Updated： Aggregation Period:Jan 07, 2026～Feb 03, 2026
This ranking is based on the number of page views on our site.

  1. [Technical Information] The Mechanism of Super Bolts and the Principle of Preventing Breakage 池田金属工業
  2. Bolt tensioner (axial force management tool) | Japan Pralard 日本プララド
  3. Wire railing products アンタック
  4. "Super Bolt": Tightening large-diameter bolts with a single torque wrench. ノルトロックジャパン
  5. 4 Stairs, balcony, wire handrail, tough tensioner マツダ金属製作所

Tensioner Product List

1～25 item / All 25 items

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Bolt tensioner for underwater bolt tightening, SUBSEA type

Bolt tensioner for underwater bolt tightening, SUBSEA type

Large bolt tightening tool for underwater and in-water use. It can be easily attached even underwater, significantly reducing bolt tightening work time! Compatible with sizes M20 to M100.

■ The sub-sea type bolt tensioner features a split puller nut that clamps the bolt, allowing for easy installation even in underwater bolt tightening with long protrusions, significantly reducing the time required for bolt tightening work! (Especially effective for long anchor bolts and foundation bolt tightening.) ■ It shortens the diver's working time for challenging large bolt tightening tasks underwater. ■ Designed with nickel plating to prevent rust. ■ Multiple bolts can be tightened simultaneously (parallel tightening) by connecting tensioners. ■ Hydraulic specification of 150 MPa, with a maximum pull stroke of 30 mm per operation. ■ It also excels in applications other than underwater bolt tightening, particularly for long bolt tightening tasks.

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Bolt tensioner

Bolt tensioner

In addition to "Standard," we also offer options such as "for Wind Turbines" and "for Underwater Operations"!

At Tortech Co., Ltd., we offer "bolt tensioners" tailored to meet our customers' needs for efficient axial force management tools. The "Standard" model is compact and highly reliable, featuring safety through "over-stroke" and a link-hose system. In addition, we provide options such as the "wind turbine model," which allows for connections with many tensioners through an optional 360-degree swivel connection, as well as models for "subsea operations" and "wind turbine foundation bolts." 【Standard Features】 ■ Compact and highly reliable ■ Safety through "over-stroke" ■ Link-hose system *For more details, please refer to the PDF document or feel free to contact us.

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Standard Bolt Tensioner 'CTST'

Standard Bolt Tensioner 'CTST'

Compatible with M20 to M100 in 6 types! It consists only of a plunger, load cell, and bridge.

The "CTST" is a simple structure bolt tensioner that allows for easy maintenance, including seal replacement, to be performed by the user. It is a bolt tensioner that enables advanced axial force management by pulling the bolt up with high-pressure hydraulics and tightening the nut in between. This model is composed solely of a plunger, load cell, and bridge. By combining six types of load cells with various plungers and bridges, it accommodates a wide range of sizes. 【Features】 ■ Lightweight and simple ■ Self-maintenance is possible ■ Supports M20 to M100 with six types *For more details, please refer to the PDF document or feel free to contact us.

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Wind turbine dedicated bolt tensioner 'WTB'

Wind turbine dedicated bolt tensioner 'WTB'

Recommended for places with narrow bolt pitch! Slim body integrated bolt tensioner.

The "WTB" is a bolt tensioner designed to work efficiently within the limited workspace of a wind turbine. It is an integrated unit with no separate parts. The lower part is tapered in a circular shape, minimizing interference with neighboring components even in wind turbines with narrow bolt pitches. It has been widely adopted as a designated tool by various companies, including the Spanish company Gamesa, and its quality and track record are well-established. 【Functions (partial)】 ■ Safety Plunger - Measures are in place at the structural level to prevent the main body from being blown away in the event of plunger breakage. ■ Snap Down Disc - Automatically assists in attaching to the nut, allowing for smooth setup. ■ 360° Swivel Joint - Makes hose connection and handling easy, ensuring it does not obstruct work in tight spaces. *For more details, please refer to the PDF document or feel free to contact us.

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Hydraulic Bolt Tensioner "HM Series"

Hydraulic Bolt Tensioner "HM Series"

Lightweight and compact! It demonstrates high bolt load capacity and excellent performance.

The "HM Series" is designed to fit all standard flanges and features a hydraulic bolt tensioner with a 30% increase in load capacity compared to conventional models. It has a long stroke of 15mm (9/16 inch) and eliminates over-stroking. Additionally, we offer the "GT Series," which has improved handling safety with a non-slip grip and is suitable for a wider range of tasks. 【Features】 <HM Series> ■ 15 types of load cells from M20 to M100 or 3/4" to 4" ■ Twin ports for quick connection of multiple tools ■ Maximum bolt load capacity of 150MPa ■ Captive socket eliminates the risk of dropped objects ■ Interchangeable adapter kits available ■ Improved handling safety with a non-slip grip *For more details, please refer to the PDF document or feel free to contact us.

  • Prime movers, torque converters, hydraulic equipment, generators
  • Tensioner

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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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Wire railing products

Wire railing products

Blend into the space without obstructing your view! Achieving a simple shape and compact design.

We handle "wire railing products." The tensioners boast a high-quality texture and excellent design, featuring a simple and easy-to-handle compact design that combines functionality and safety. With excellent workability that allows for easy installation by one person, it protects the boundary between homes, buildings, and their environments without breaking them, preserving them in their natural state. The structure prevents slack with a tension spring, allowing for various installations on horizontal, sloped, and wall surfaces. 【Features (excerpt)】 ■ High-quality texture with reduced gloss ■ Easy installation with only a dedicated wrench and a 5mm hex key ■ Can be installed up to a maximum length of 6m ■ Tension adjustment is simple ■ No variation in strength regardless of who performs the installation *For more details, please refer to the PDF materials or feel free to contact us.

  • handrail
  • Tensioner

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Stairs, balcony, wire handrail, rope tensioner

Stairs, balcony, wire handrail, rope tensioner

Simplicity is best.

This is an announcement from Mazda Metal Works Co., Ltd. regarding "stairs, balconies, wire handrails, and rope tensioners."

  • Privacy louvers and louver shutters
  • Tensioner

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Stairs, balcony, wire handrail, tough tensioner

Stairs, balcony, wire handrail, tough tensioner

Blending into the space: Simple & Compact.

The new tough tensioner, which does not obstruct the field of vision and creates a sense of spaciousness, is designed with a high-quality texture and excellent design, and is unparalleled in terms of functionality and safety.

  • Privacy louvers and louver shutters
  • Tensioner

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Wood Installation Dedicated Tensioner "Wood Tensioner"

Wood Installation Dedicated Tensioner "Wood Tensioner"

We aimed to ensure that our design does not interfere with the creator's space-making (that the hardware is not conspicuous).

The "Wood Tensioner" is a dedicated tensioner for wood installation that can be embedded into the wood at both ends, allowing it to be unobtrusive and creating a sense of even more space compared to conventional products. The main fittings are primarily made of SUS304, and the wire is made of SUS316, taking into account texture and rust prevention. 【Features】 ■ Design with embedded main fittings ■ The fittings not protruding contribute significantly to both aesthetics and safety ■ Wire can be cut and adjusted on-site ■ Easy to install by one person *For more details, please download the PDF or feel free to contact us.

  • Wire
  • Tensioner

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"Voltite" Evolution Type Bolt Tensioner

"Voltite" Evolution Type Bolt Tensioner

An evolved hydraulic tensioner that overcomes the challenges of conventional tensioners, such as "too heavy," "does not fit in narrow spaces," and "oil leakage due to repeated use."

The hydraulic bolt tensioner from "Boltight," a member of the Nord-Lock Group, was born as an evolved version re-invented by the engineer Fred Heaton, who developed the tensioner itself, to overcome the challenges faced by the tensioner. These challenges include common disadvantages of hydraulic tools like tensioners, such as being "too heavy and difficult to work with," "leaking oil after repeated use," and "not being installable in confined spaces." All of Boltight's tensioners have been significantly lightweighted to the extreme, using in-house developed bridges and seals to greatly reduce the weight of the tensioner. Additionally, the durability for repeated use has been greatly improved with technologies such as in-house developed seals. Furthermore, we can flexibly customize the shape and size for areas where space constraints prevent application, delivering them with the same lead time as standard products.

  • Foundation construction
  • Bridge Construction
  • Railway Construction
  • Tensioner

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Super Bolt with Railway Vehicle Adoption Examples

Super Bolt with Railway Vehicle Adoption Examples

A single torque wrench can handle large diameter fastening of M30 and above! Mechanical bolt tensioner.

The "Super Bolt" is a mechanical bolt tensioner. It allows for the tightening of large diameter bolts using standard tools alone, achieving the desired axial force with astonishing precision. Thanks to its patented structure, it does not loosen even under intense vibrations. Sizes are available starting from M16, and other sizes can also be accommodated. 【Features】 ■ Can tighten large bolts using standard tools alone ■ Does not loosen even under intense vibrations ■ Size: Starting from M16 *For more details, please refer to the PDF document or feel free to contact us.

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Bolt tensioner (axial force management tool) | Japan Pralard

Bolt tensioner (axial force management tool) | Japan Pralard

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

- Compatible with large bolt tightening from M20 to M300. (Custom manufacturing 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. (Proven capability of tightening 40 flange bolts simultaneously in parallel.) - The bolts are pulled hydraulically, applying tensile load for tightening, which eliminates the influence of friction between the thread surface and the seating surface. "Axial force can be managed directly," allowing for more accurate axial force management compared to torque management. - A standard model of bolt tensioner that has been compacted and lightweight to the extreme. It can be used for bolt tightening even in narrow spaces. Custom manufacturing is also available. - It is a puller exchange type, allowing one main unit to accommodate multiple bolt sizes, providing high versatility. - Since the bolts are not twisted, friction heat does not occur, preventing galling between the nut and flange surface and seizing of the threaded parts. <Contact for 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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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 reliable built-in automatic return spring.

■ 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 tightening force. ■ The gearbox is a run-down type, allowing for quick seating of nuts with a ratchet wrench. ■ Long lifespan, designed for a minimum of over 10,000 pressure cycles. ■ The drive socket features a spring-integrated snap-down structure for quick installation of the main body 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 the construction of offshore and onshore wind power generation. ■ Also effective for tightening large bolts ranging from M24 to M64 in applications other than wind power generation. <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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Bolt tensioner for wind turbines "GR LD Series"

Bolt tensioner for wind turbines "GR LD Series"

Bolt tensioners 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 possible to meet the requirements of almost any application. 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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Subsea tensioner for underwater operations

Subsea tensioner for underwater operations

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 a unique composite material and can be installed directly without any adjustments. <Main Benefits> ● Completely prevents oil leakage 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

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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 working time, simple operability, safety on the work surface, and robustness. >>Features Reliability that prevents performance degradation of the tensioner A safety valve prevents over-stroke due to excessive pressure, protecting against seal blowouts and exposure of workers to discharged oil. It is treated with a unique special surface treatment 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 a wind turbine assembly project, tightening the foundation bolts is one of the most complex tightening tasks. Dirt, misalignment, rust, control of elongation, 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. 【Main 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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Hydraulic Tensioner "Boltight"

Hydraulic Tensioner "Boltight"

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

"Boltight" 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 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 using only hand tools! A bolt that ensures reliable axial force.

This document introduces the reduction of breakage risk for Super Bolts. It explains the causes of breakage in large diameter bolts, and then provides a detailed explanation of the axial force generation process of 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 breakage in large diameter bolts ■ Reducing breakage risk with Super Bolts ■ Summary *For more details, please refer to the PDF document or feel free to contact us.

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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 when 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 tough 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 bolts with high-pressure hydraulic force while tightening nuts - Enables efficient work - Corrosion-resistant body - Supports M20 to M100 with six types *For more details, please refer to the PDF document or feel free to contact us.

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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 for foundations is specially designed to apply tension to the foundation bolts of wind turbines. Additionally, the oval-shaped hydraulic bolt tensioner "FTE Series" is specially 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 materials 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 the 3-meter-long studs from the bucket wheel drive output of the Sandvik stacker reclaimer is a difficult and time-consuming task. In previous operations, it took over 10 hours to remove each stud, and it required up to 120 tons of force to push or pull a total of 16 studs. To safely and timely remove the studs, a custom GT4 hydraulic tensioner was developed. The tensioner extracts each stud in about 30 minutes, significantly saving the maintenance team's time. [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.

  • Prime movers, torque converters, hydraulic equipment, generators
  • Tensioner

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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 enormous bolts and nuts that cannot be tightened by human strength using 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 torques, it dramatically improves work safety. Additionally, it achieves remarkably accurate fastening force, allowing for work in high or confined spaces without issues. The use of electric tools and air tools further shortens work time, dramatically reducing downtime caused by operations and enabling low-cost operations. 【Features】 ■ Amazing 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 ■ Incredible axial force precision prevents loosening even under severe vibrations ■ Strong against loosening that does not involve return rotation due to thermal cycles, thanks to elastic fastening ■ Usable without issues in confined or elevated spaces *For details, please refer to the catalog or contact Nord-Lock Japan. *Beware of imitations 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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Super Bolt GT Series

Super Bolt GT Series

Delivering the appropriate axial force more easily and quickly. Super Bolt GT Series.

The GT tensioner is ideal for medium to high-strength studs and bolts. It is also suitable for use in harsh environments, allowing for the safe and easy installation of high axial forces and can be used with various large-diameter bolts. The small jack bolt at the top of the product can be installed and removed with hand tools, enabling consistent axial force regardless of the operator's skill level, thus providing high reproducibility. Additionally, we maintain stock domestically, allowing for quick delivery.

  • Bridge Construction
  • Steel bar construction
  • Tensioner

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