Torque Tools

Torque Screwdrivers

  • Details
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Type Torque Screwdrivers

Norbar’s new range of Torque Screwdrivers embodies the value of the TT series: accuracy, ease of use and comfort in use. With an accuracy that exceeds the requirement of ISO6789 (±6% for tools up to 10 N.m). Furthermore, they are engineered to retain this accuracy over many thousands of tightened cycles. Available in N.m, lbf.in or production 'P' Type models.

  • Supplied with a 1/4” hexagon bit holder designed using a 4 mm hexagon stem.
  • For maximum versatility and particularly for applications with limited access, the bit holder can be removed and replaced with widely available screwdriver blades.
  • Easy torque adjustment without the need of additional specialist tools.
  • All tools feature a lock to prevent accidental adjustment of the set torque.
  • Accuracy exceeds the requirements of ISO6789.
  • Traceable calibration certificate for the clockwise direction supplied with all adjustable tools. ( Not ‘P’ Types).
  • Tool ‘slips’ when torque is achieved removing the possibility of ‘over-tightening’.
  • Comfortable, durable handle. The handle is constructed using two materials: a base material for strength overlaid with a soft feel grip for comfort and slip resistance.
  • Also available in kit form supplied with a range of 12 screwdriver bits.

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Torque Wrenches

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Type Torque Wrenches

Norbar Torque Tools manufacture an extensive range of high quality torque wrenches to cover torque values from 1 N·m to 2000 N·m. They are designed and manufactured to exceed international standards for accuracy.

In addition to the normal 'adjustable' torque wrenches, Norbar offer Production 'P' Type versions which can be pre-set and dedicated to a particular application. This setting system is designed to discourage unauthorised alteration.

All Norbar torque wrenches are offered as standard with a quality ratchet. For applications where interchangeable end fittings are required, 'Torque Handles' are also available in various models up to 650 N·m.

  • Accuracy exceeds all international standards.
  • Unmistakable signal when set torque is reached.
  • Traceable calibration certificate supplied to satisfy ISO9000:2000 quality systems.
  • High quality 72 tooth ratchet allows use in confined spaces.
  • Fixed head version has a push through square for left and right handed torque tightening.
  • Moulded grip aids correct hand location and operator comfort.

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Manual Torque Multipliers

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Type Manual Torque Multipliers

Norbar gearboxes are built to an extremely high standard of precision. All gears rotate on needle roller bearings about hardened and ground journal pins. As a result, Norbar HandTorques can be relied upon to have a torque multiplication accuracy of +/-4%, throughout the operating range, taking the uncertainty out of high torque tightening.

No gearbox is 100% efficient and so the velocity ratio (the number of turns that the input has to make to achieve one revolution of the output) is not the same as the torque multiplication ratio. Norbar multipliers are engineered such that each gear stage has a velocity ratio of typically 5.45:1 which results in a true torque multiplication factor of 5:1.

  • Models up to 2,700 N.m available.
  • 5:1 Torque multiplication, accuracy guaranteed better than +/-4%.
  • Supplied with two reaction bar styles for maximum versatility.
  • Robust construction means minimal maintenance and long life.
  • Supplied in a carrying case, the Highwayman is ideal for inclusion in the heavy vehicle tool kit.
  • 1300 N·m version has a spare 3/4" output square included in the kit.
  • Multiplier head only (no reaction bars or plastic box) also available.
  • A variety of reaction styles are available for maximum versatility.

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Pneumatic Torque Multipliers

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Type Pneumatic Torque Multipliers

Hand operated torque multipliers are ideal for low volume or intermittent use or when there is no power source available. However, for production lines or whenever a large number of bolts is involved, a powered multiplier will save a considerable amount of time.

PneuTorque operation is quiet - less than 85dB(A) with absolutely no impacting. These two factors make PneuTorques comfortable for the operator to use, reducing fatigue and consequently increasing safety.

PneuTorques provide accurate torque control - on a given joint they will stall repeatably to within +/-5%. Using electronic shut off, this repeatability can be improved to +/-2%.

  • Light weight - single direction stall tool weighs just 3.8 kg.
  • Quiet - less than 85 dB(A) when under load.
  • Low vibration levels make these tools comfortable and safe to use - non impacting.
  • Square drive is quickly and easily replaceable.
  • 'Soft Start' trigger control aids socket location and allows gradual and safe reaction location.
  • For safety, gearbox can rotate independently from the handle so that reaction forces are not transmitted back to the operator.
  • Dual Trigger versions reduce the risk of the operator's hands becoming trapped between the reaction bar and reaction point.

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Electronic Torque Multipliers

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Type Pneumatic Torque Multipliers

Norbar's electronic torque tool utilises patent pending motor technology and control software to give unprecedented joint control.

Traditional electronic torque tools give vastly different results depending on the joint type. Norbar's intelligent joint sensing eliminates these issues so that you can be confident in your bolting work.

  • Range from 200 N.m to 6000 N.m
  • Versions for 110V a.c. or 230V a.c.
  • Factory calibrated to ± 3%
  • Very low vibration levels using a non-impacting mechanism; this leads to comfortable and safe use with less damage to the tool, socket and threaded assembly
  • Reaction forces are contained by the reaction bar, so forces are not passed back to the operator

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Reaction Accessories

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Type Reaction Accessories

All Norbar torque multipliers are supplied as standard with a reaction plate, but where the standard option is not suitable other options are available.

Nose Extensions are also available for Norbar HandTorque, PneuTorque and EvoTorque multipliers for situations where tool access is restricted.

A variety of reaction plates and adaptors, together with ancillary feet, blades and heads to aid their use are available for HandTorque, PneuTorque and EvoTorque Multipliers.

  • Pneutorque PTM-72-1000-B, with 200 - 1,000 N.m range, drives the bolt via a standard socket.
  • Special torque reaction assembly bridges the rail, locating the nut via a spring loaded arm.
  • Two aluminium feet react on the rail top (tighten / untighten).
  • The reaction feet can be set to suit 3 x rail top to bolt distance variants.
  • The M24 (36mm A/F) nut locator is replaceable .
  • Hexagon bolt 27mm A/F, tighten to 210 N.m and then through a further 180° angle.
  • All for use with Norbar wrench TT200, 40 – 200 N.m, with ½” square drive

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Torque Measurement

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Type Torque Measurement

Norbar's torque transducers have established an excellent reputation based on exceptional quality and accuracy. A very wide torque range is covered, 0.04 N·m to 100,000 N·m and three basic transducer configurations are offered; Static, Impulse Rotary and Annular.

All transducers up to 100,000 N·m are supplied as standard with a UKAS accredited calibration certificate from Norbar's in-house laboratory.

For customers who wish to take advantage of Norbar's transducers but have an existing, non Norbar display instrument, transducers can be provided with a mV/V calibration.

  • Pictorial display panel for easy mode selection.
  • Limit detection with low, pass and high indication both on the screen, and by coloured LEDs.
  • Limit status is also output via RS-232-C. Target torque and tolerance can be set by the operator.
  • Memory for calibration details of 20 non-“SMART” mV/V calibrated transducers.
  • All common measurement units for torque are included plus users can configures their own units to interface with non torque transducers.
  • Supplied in carry case.
  • RS-232 cable included as standard.

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Calibration Equipment

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Type Calibration Equipment

Norbar's Test Beams are designed for the static calibration of Torque Transducers. They are ideally suited to Norbar's transducers, but can be employed on other manufacturer's equipment.

Torque is generated by the application of a known force at a known radius from the centre of rotation of the torque transducer.

Designed to remove potential sources of measurement error, these beams can be used to calibrate Norbar torque transducers, and torque transducers from other manufacturers (where design permits), as well as mechanical test devices. UKAS length certification is provided with each beam.

  • Beam length machined to +/-0.01% (100 microns per meter).
  • Clockwise and counter-clockwise operation.
  • Beams balanced to maximise energy transfer to transducer during loading.
  • High beam accuracy allows use of cast iron weights rather than stainless steel.Weight accuracy is required to be equal to or better than 0.01%.
  • High quality bearings to reduce energy losses.
  • Gearbox provided to level beam and remove cosine errors.

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Ultrasonic Bolt Measurement

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Type Ultrasonic Bolt Measurement

In certain critical bolting applications, factors such as friction or bolt/joint geometry are such that the measurement of applied torque alone will not provide the degree of accuracy necessary to control the preload to be monitored over the service life of the fastener. In these applications, ultrasonic measurement of fastener elongation and/or load has frequently proven to be the most accurate, reliable and cost effective solution.

Ultrasonic measurement of bolt preload is made possible by introducing a sonic pulse at one end of the fastener and accurately measuring the time of flight (TOF) required for the echo to return from the opposite end. Using material constants, the USM-3 converts this TOF into an "ultrasonic length" of the fastener, providing a baseline from which future measurements will be made. When the fastener is tightened, the TOF increases and the USM-3 will again utilise material constants to eliminate the effects of stress and temperature variations on sound velocity, providing an accurate elongation or load measurement.

  • Large 1/4 VGA back lit display is easily visible from a distance and in poor light.
  • Can store up to 2000 measurements.
  • Rugged steel and aluminium case designed for production and site environments.
  • Measures fasteners of virtually any material from 1/2 inch (12mm) to over 50 feet (17m) in length.
  • Measurement modes of pitch-catch and pulse-echo.
  • Unit can be operated with mains power supply or via 4 'C' cell batteries.
  • Works with magnetic and glue on transducers from 1 MHz to 10 MHz.

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