Norbar HT 6/25 AWUR Manual Torque Multipliers 340-3400NM, Output Square: 1 1/2", Input Square: 1/2"
The Norbar HandTorque HT-6/25 AWUR is a manual torque multiplier designed to deliver up to 3,400 N·m, with a 1/2" square input, 1-1/2" square output and torque multiplication accuracy better than ±4%. Featuring an anti-wind-up ratchet (AWUR), it helps control stored energy in the gear train during tightening and improves operator safety. Supplied by General Tech Services LLC, UAE, it is suitable for demanding industrial bolting applications without an external power source.
For pricing and availability, call +971 6 5436933.
Part No. 16092
The Norbar HT-6/25 AWUR is designed for heavy bolting applications requiring output torque between 340 and 3,400 N·m. Its multi-stage epicyclic gearbox converts input torque from a standard torque wrench into a much higher output, making it useful for large fasteners in industrial maintenance and field service.
The multiplier has a nominal torque multiplication ratio of 25:1. Norbar specifies the true torque multiplication ratio rather than the velocity ratio, so confirm the exact mean torque ratio from the manufacturer's documentation before calculating input settings for critical joints.
The tool accepts a 1/2" square-drive torque wrench and provides a 1-1/2" square output. Since it operates manually, it requires no electricity, compressed air or battery, making it suitable for offshore facilities, remote substations, confined vessels and other locations where powered tools may be impractical.
Its anti-wind-up ratchet helps retain stored energy in the gear train when the input wrench is released, reducing the risk of sudden kickback and making repositioning easier between tightening operations. If this feature is not required, the standard Norbar HT-6/25, Part No. 16024, is an alternative.
Key Benefits
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High torque output: Delivers up to 3,400 N·m for demanding bolting tasks.
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Anti-wind-up ratchet: Helps control stored gear-train energy and reduce input-wrench kickback.
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Torque multiplication accuracy: Better than ±4%.
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Manual operation: Requires no electricity, battery or compressed air.
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High multiplication ratio: Allows a suitable torque wrench to produce much higher output torque.
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Portable design: Suitable for workshops, field maintenance and remote industrial sites.
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Alternative model available: The HT-6/25 without the anti-wind-up ratchet is available under Part No. 16024.
For pricing and availability, contact General Tech Services LLC at +971 6 5436933.
Who This Product Is Best For
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Maintenance teams handling fasteners requiring up to 3,400 N·m.
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Offshore, oil and gas, and petrochemical facilities where powered tools may be restricted.
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Industrial technicians who need a portable, manual high-torque solution.
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Workshops with a suitable 1/2" torque wrench that need greater output torque.
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Operators who want the additional control provided by an anti-wind-up ratchet.
How to Use It
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Identify the required output torque and confirm the multiplier's exact mean torque ratio using the manufacturer's documentation.
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Calculate the required input torque using the verified ratio.
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Set a suitable 1/2" square-drive torque wrench to the calculated input value.
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Attach the torque wrench to the multiplier's input and fit the correct socket to the 1-1/2" output.
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Position the reaction arm against a suitable, secure reaction point according to the manufacturer's instructions.
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Apply force smoothly and confirm that the tightening cycle has completed as intended.
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Release and reposition the tool safely before continuing with another fastener.
Always follow the manufacturer's operating instructions and the applicable bolting procedure. Do not assume that the nominal 25:1 ratio is the exact torque ratio when tightening critical joints.
Frequently Asked Questions
1. What is the maximum output torque of the Norbar HT-6/25 AWUR?
It delivers up to 3,400 N·m, with a listed working range of 340–3,400 N·m.
2. What does AWUR mean?
AWUR stands for anti-wind-up ratchet. This mechanism helps retain stored energy in the gear train when the input wrench is released, reducing the risk of sudden kickback.
3. What is the torque multiplication ratio?
The nominal ratio is 25:1. Confirm the exact mean torque ratio in the manufacturer's documentation before calculating input torque for critical applications.
4. How accurate is the HT-6/25 AWUR?
Its torque multiplication accuracy is specified as better than ±4%.
5. What input and output drive sizes does it use?
It has a 1/2" square input and a 1-1/2" square output.
6. Does this torque multiplier require a power supply?
No. It is manually operated and does not require electricity, compressed air or a battery.
7. What is the difference between the HT-6/25 AWUR and HT-6/25?
The HT-6/25 AWUR (Part No. 16092) includes an anti-wind-up ratchet, while the standard HT-6/25 (Part No. 16024) does not.
8. How can I get a price in the UAE?
Contact General Tech Services LLC for current pricing, availability and lead time by calling +971 6 5436933.
Request a quote for the Norbar HandTorque HT-6/25 AWUR, Part No. 16092, from General Tech Services LLC, UAE. Call +971 6 5436933.
