Multi-stage bolt tensioner (for wind power generation) - Nippon Pralado
Multi-stage bolt tensioner, high axial force type - Japan Plarad
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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basic information
■ Ideal for tightening blade bolts and foundation anchor bolts in wind power generation. ■ A multi-stage high axial force type with a built-in two-stage piston, allowing for a slim body while delivering significant tightening axial force. ■ Equipped with an over-stroke prevention device and an automatic return spring. ■ The hydraulic joint features a 360-degree rotating swivel. ■ The bolt tensioner can simultaneously and uniformly tighten multiple large bolts. ■ Provides higher precision tightening through "axial force management" compared to torque management. ■ Tightens bolts by pulling them with hydraulic force, preventing damage to the flange surface and nut seating. Additionally, it allows for high-precision tightening due to the absence of friction effects. ■ Designed and manufactured with optimal customization according to application needs. ■ Available for sale and rental.
Price information
Both purchase and rental options are available. Please feel free to contact us as it varies by model.
Delivery Time
※For rentals, immediate delivery. For sales, approximately 40 days. Please feel free to contact us.
Applications/Examples of results
■Foundation bolt tightening for wind power generation. ■Assembly of wind power generation, nacelle and yaw bearing. ■Bolt tightening for the blade bearing section of wind turbines. ■Foundation bolt tightening for construction work. ■Flange bolt tightening. ■Tightening of large bolts in the M24 to M56 class. Active in various industries, widely engaged in large bolt tightening operations on site.
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Company information
Plarad is a specialized manufacturer of hydraulic torque wrenches, boasting the oldest history and tradition in the world (since 1962). The design and manufacturing of all hydraulic torque wrenches began with Plarad. As a pioneer, it has developed many patented technologies and high-precision hydraulic torque wrenches, electric torque wrenches, air torque wrenches, and bolt tensioners specifically for large bolt tightening, which are used in various industrial sectors worldwide. It offers a lineup of tools ranging from 50 Nm to one of the largest tightening torques in the world at 500,000 Nm. - Awarded the Germany TOP 100 Innovators Award. - As a leading company in hydraulic torque wrenches and bolt tensioners, it supplies hydraulic tools for large bolt fastening systems capable of torque management and axial force management to Japan and the world. - Engaged in manufacturing, sales, and rental business. - Plarad hydraulic torque wrenches have numerous delivery records, including the Tokyo Skytree, Abeno Harukas, the world's largest shield machine, the world's largest wind turbine at 8.0 MW, the world's longest high-speed tunnel, the linear Shinkansen, Boeing 787, and JAXA Tanegashima Space Center. - Certified with international standards ISO 9001 and ISO 14001.