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  1. Home
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  3. 日本プララド
  4. Bolt tensioner, ArmorMax protection for hydraulic nuts (super hard surface treatment)
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  • Nov 14, 2025
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Nov 14, 2025

Bolt tensioner, ArmorMax protection for hydraulic nuts (super hard surface treatment)

日本プララド 日本プララド
■ ArmorMax: Enhanced Durability with Ultra-Hard Surface Treatment Our proprietary ArmorMax features a specially developed ultra-hard surface treatment. With a high-strength surface finish, it is resistant to scratches, wear, and corrosion, making it a "bolt tensioner with significantly improved durability." ■ Improved Fatigue Strength with ArmorMax Protection Metal fatigue, which occurs when repeated loads cause tiny scratches on the metal surface that lead to crack propagation, reduces lifespan. ArmorMax protection retains compressive surface stress that counteracts this, significantly increasing fatigue strength and providing crack suppression for a longer lifespan. ■ Enhanced Wear Resistance ArmorMax is treated with an ultra-hard surface that is resistant to scratches and marks. With high surface hardness and low friction coefficient, it not only improves wear resistance and fatigue strength but also reduces sliding wear, preventing damage to bolt tensioners and hydraulic nuts, thus extending their lifespan. ■ Improved Corrosion Resistance In neutral salt spray tests for corrosion resistance (over 800 hours), ArmorMax demonstrates superior corrosion resistance compared to other metal surface treatments like zinc plating and nickel plating, offering more than three times the rust prevention effect of standard black oxide treated bolt tensioners and hydraulic nuts. Japan Plarad Co., Ltd.
Bolt tensioner, ArmorMax protection for hydraulic nuts
Bolt tensioner, ArmorMax protection for hydraulic nuts
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Product Features of Bolt Tensioners | Japan Plarad

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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

  • Hydraulic Equipment
  • Torque wrench
  • Other work tools

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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

  • Hydraulic Equipment
  • Torque wrench
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Hydraulic nut (lock type)

No tools needed! The hydraulic nut can tighten 40 flange bolts simultaneously! Since it tightens with uniform force at the same time, the bolt axial forces do not vary.

■ The hydraulic nut can tighten 40 flange bolts simultaneously at once! ■ The hydraulic nut is a revolutionary nut that tightens bolts by pulling them with the hydraulic function of the nut body! The nut itself tightens the bolt. ■ Since the nut is tightened by pulling force without twisting, there is no frictional influence with the seating surface, allowing for precise application of axial force directly to the bolt. ■ It tightens multiple bolts simultaneously and uniformly, preventing variation. ■ Because it pulls and tightens the bolt hydraulically, it does not damage the surface of the flange or the seating surface of the nut. ■ Tightening through axial force management achieves higher precision than torque management due to the absence of frictional influence. ■ It accommodates large bolt tightening from M20 to M300 class. ■ There is also a stainless steel version of the hydraulic nut with anti-corrosion specifications. <For inquiries about purchasing hydraulic nuts> Please contact us for free demos, quotes, and requests for materials. Nihon Purarado Co., Ltd. TEL: 078-967-3556

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  • Hydraulic Equipment
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Armor Max protection for bolt tensioners (super hard surface treatment)

Armor Max protection for bolt tensioners (super hard surface treatment)

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Fukuda's leak test, leak inspection, leak detection, leak test, integrity test.

  • NEW
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Fukuda Co., Ltd. has been pursuing leak detection for 60 years and is committed to advancing the future of leak testing. 【 Supporting Various Leak Tests: Air Leak Test / Gas Leak Test (Hydrogen Gas, Helium Gas) 】 We develop, manufacture, and sell leak testing equipment to inspect airtightness and sealing properties. We will propose the appropriate testers and devices for each inspection target. 【 Target Industries and Examples of Inspection Targets 】 - Automotive Industry: Engines, FC components, valves and piping, various parts - Electronic Components Industry: Smartphones, keyless switches, various small sensors - Pharmaceuticals / Food / Cosmetics Industry: Bottle containers, syringes, vials, eye drop containers, pillow packaging, PTP packaging We will propose the most suitable leak testers for each industry. 【 ISO Certification 】JIS Q 9001:2015 (ISO 9001:2015)

Jan 26, 2026

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[Video Manual Guide] We will clearly explain how to connect the wireless set that links the bed exit sensor and nurse call system through video!

  • NEW
  • OTHER

Hotron, which manufactures and sells sensors, provides bed exit sensors for hospitals, nursing, and care facilities. Hotron offers easy-to-understand video guidance on how to use the bed exit sensors wirelessly and how to set up device connections! ▼ Video Manual (YouTube) https://www.youtube.com/playlist?list=PLNVA4mTrZDqtJa6MfFRZQxwtfCSnAfxVy 【Bed Exit Sensors】 ○ Non-contact infrared sensor, simply place it - Pole-kun HB-H1 ○ Mat sensor, foldable thin mat - Mat-kun HB-UST ○ Body movement call - Ugo-kun HB-TV3 ○ Body movement call for wheelchairs - Ayumi-chan HB-WTV3 【Options】 ○ Nurse call linked wireless set - Wireless set (transmitter/receiver) HB-RS/HB-RJ ◎ For more information about the products, please contact us or download the catalog.

Jan 26, 2026

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■■ Air Leak Tester | FLA-0200 / FLA-0201 series ■■ Fukuda's new flagship model. Equipped with mastering correction function, it enables high-precision measurements in a short time.

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Fukuda's new flagship model. - Masterless type (FLA-0200 series) - General type (FLA-0201 series) Two models of air leak testers. With the mastering correction function, high-precision measurements can be achieved in a short time. Please take a look at the catalog.

Jan 26, 2026

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PFAS Regulation Countermeasures! ■■ Leak Test Equipment for Small Electronic Components|MSA-0101 series ■■ Does not use fluorinated inert fluids. PFAS-free. Offers accuracy equal to or better than liquid immersion testing.

  • NEW
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● This is a leak testing device for small electronic components that does not use fluorinated inert liquids (PFAS-free). ● There is no longer a need for unstable visual confirmation through liquid immersion testing. It adopts a quantitative testing method that allows for stable pressure leak testing. ● It is a tabletop leak testing device specifically for gross leaks, with accuracy equal to or greater than that of liquid immersion testing. ● The detectable range is approximately 1×10⁻² Pa·m³/s to 1×10⁻⁶ Pa·m³/s (varies depending on the target product). ● It is suitable for sealed structures ranging from a few millimeters to a maximum of 80 × 70 mm. Please feel free to contact us for more information!

Jan 26, 2026

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【Metal Crack Repair】We repair cracks in metal products without applying heat.

  • NEW
  • COMPANY

The "Mechanical Stitching Method" by Nichinichisui Road Machinery Co., Ltd. is a new technique that allows for the repair of metal cracks without the application of heat. By using special bolts and reinforcement plates, cracks are physically removed, and repairs are made without causing any thermal impact on the base material. Repairs can be carried out even in environments where open flames cannot be used. Since no heat is applied, the disassembly of equipment is minimized. ◎ For more details, please contact us. ◎ If a detailed technical explanation is needed, please contact us.

Jan 26, 2026

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  • 首都圏最大級の工業技術・製品の総合見本市 テクニカルショウヨコハマ2026 第47回 工業技術見本市 時代をひらく新たな技術 2026年2/4(水)・5(木)・6(金) 10:00-17:00 来場者募集中
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