Torque Wrench Information



  • Users and bystanders must wear proper safety equipment.
  • To avoid possible eye injury from flying objects, safety goggles or equivalent protection conforming to ANSI 1 shall be worn and kept clean by the user and all persons in the immediate area where any tool is being used.
  • Comfort or plastic grips on handles are not intended to give any degree of protection against electric shock and shall not be used on or near live electric
  • Torque wrenches are a precision instrument. Read the instruction manual completely before using any torque wrench and learn the proper method to operate, maintain and store torque wrenches.



  • Users and bystanders must wear safety
  • To avoid possible eye injury from flying objects, safety goggles or equivalent protection conforming to ANSI 1 shall be worn and kept clean by the user and all persons in the immediate area where any tool is being used.
  • A torque multiplier generates an output torque much greater than the input.
  • Do not use a torque multiplier without reading and learning the safety and operating instructions that are provided with each torque multiplier.
  • Users must wear hard hats, gloves, and steel-toed boots.

Dial Type Torque Wrenches

  • All dial torque wrenches are “State-of-the-Art” torque. Exclusive torsion beam design provides long life and accuracy.
  • Exclusive bipolar dual scales, English and Metric, permits accurate reading of both scales, with follower
  • Equally accurate in both left and right hand
  • Torsion drive
  • Large easy-to-read
  • User assured of long life and
  • Accurate, ± 3% both ways at 20-100% of full
  • Meets and/or exceeds requirements of GGG-W-686 and/or ANSI 14M.
  • Calibration traceable to National Institute of Standards and Technology (NIST).
  • All wrenches shipped in plastic storage box or metal case (except 2,000 lbs.), which will be shipped in a cardboard carton.
  • All wrenches include a “Certificate of Calibration. ”


  • Torque wrenches are to be used to tighten fasteners. Do not use torque wrenches to loosen or remove fasteners.
  • Users shall apply a controlled force with a stance adjusted and braced to prevent rapid bodily movement or a fall if a sudden release occurs.
  • Always pull, do not push to apply torque.
  • Do not use torque wrenches with sockets or fasteners showing wear.
  • Keep torque wrenches clean. The ratchet mechanism may slip or break if dirty, mismatched or worn parts are used.
  • Make sure the direction lever is fully engaged.
  • Take care to never overload a torque wrench past its maximum torque.
  • Torque wrenches are to be used by hand. Do not use cheater bars or any other means of increasing leverage.
  • Use the appropriate drive size. Select the torque wrench drive that is in the mid-range of the desired torque.
  • Never expose any torque wrench to excessive heat, which may change the hardness or microstructure and ruin the tool.
  • Never use torque wrenches for prying.
  • Send torque wrenches to a qualified lab for calibration at least once a year or every 5,000 cycles, whichever comes first.
  • Inspect and discard bent, worn or damaged torque wrenches
  • Users shall apply a controlled force with a stance adjusted and braced to prevent rapid bodily movement or a fall if a sudden release occurs.
  • Only use impact sockets with torque multipliers and secure to the output square with a retaining pin & O-ring. Never use hand sockets or any attachments (including adaptors) with torque multipliers.
  • Before each use, inspect and replace any torque multiplier output squares showing signs of wear or cracks.
  • Before each use, inspect and tighten the torque multiplier holding screws.
  • Before each use, inspect and replace any impact sockets or fasteners showing signs of wear or cracks.
  • Do not use impact guns with torque multipliers.
  • Do not use breaker bars with torque multipliers.

Torque Angle Method

The torque wrench has been the standard for tightening bolts and nuts that clamp parts together for many years. Torque is the force used to turn a fastener nut or bolt against friction. Friction occurs between the nut or bolt threads, fastener head, and component surface. With the many variations in squareness and stiffness of the mating parts, clamping forces can vary significantly. The torque method also relies heavily on the consistency of the operator.

The Torque Angle Method specifies an initial torque in conjunction with a specific angular measurement. The initial torque mates the components. The fastener is then rotated a specific number of degrees. If cross-threading or high-friction occur, the fastener won’t rotate the proper number of degrees. If the fastener strips or there is low friction, it will rotate beyond the specified number of degrees.

The Torque Angle Method takes into consideration the many variables such as flatness, the squareness of bolt heads, and surface finish that torque alone doesn’t account for. The Torque Angle Method is commonly used in Europe and specified by Mercedes-Benz for over 15 years on all critical fasteners.

Electronic Torque Wrenches

The E-Wrench digitally displays fastener torque specification settings, torque readings, and peak hold measurements.

  • Display – The wrench features a custom LCD with keypad selectable torque units conversion readout in lbs., in. lbs., kg cm, and Nm. 10 Bar-graph for Preset value.
  • Setting – Torque specification for the fastener. The set value is adjustable between 10% and 100% of full scale by pushing the up or down. The scrolling display adjustment rolls-over at both ends for a convenient and quick setting.
  • Tracking – While wrenching, the display switches to read the actual torque applied with a 2-second update rate.
  • Audible and LED’s – When the applied torque equals the set torque value the wrench outputs a 1/2 second audible tone and the Green LED’s and Red LED’s lit until torque is Yellow LED’s will light at -10% of Preset-torque.
  • Peak Hold – When torque is released the display holds and flashes the peak torque reading for 10 seconds or until torque is re-applied.
  • Overload – If the wrench is used beyond 100% full scale the audible tone will pulse rapidly to warn the operator to stop. At 125% of full scale, the display will lock up and read “- - - -.”
  • Zero – Automatic self-check and re-zero at power-on and any time the ON/ZERO key is (This is not a calibration check).
  • Setup Memory – At power-on, the wrench returns to the last unit and torque
  • Battery – The Wright Tool wrench uses three standard replaceable “CR123” Lithium cells for better than 80 hours continuous use. A display indicator shows battery condition. A flashing “bAtt” display means the wrench is no longer accurate and the battery must be replaced.
  • Auto Power Off - Automatic shut-off after sitting idle for 2 minutes.


Unscrew end cap on the back of the handle and install two “CR123” 3 Volts Lithium cells, positive end into the handle first.

  1. Push “ON/ZERO” key – the wrench will self-test and display the last fastener torque setting.
  2. Push “UNITS” key – to select “Nm,” “ft lb,” “in lb.” or “kg cm
  3. Push and hold “ ” (UP) or “ ” (DOWN) keys to set the fastener torque (Display will roll-over at each end).
  4. Apply torque slowly, grasping the center of the DO NOT APPLY LOAD TO THE END OF THE HANDLE. The display will TRACK the applied torque. Stop and release torque when the audible alert is heard and the Green and Red LED’s lit, Yellow LED’s will lit at 90% of Preset.
  5. On release, note the PEAK (highest) torque applied* it will be displayed, flashing for 10 seconds or until torque is re-applied.

* The PEAK torque reading will tell you if excess torque has been applied. This feature can be used to improve your wrenching technique for best accuracy. E-Wrench will automatically shut off after two minutes sitting idle to conserve battery power. The ON/ ZERO key can be held down for 5 seconds to turn the wrench off.


Contact CDI Torque Products for calibration services.

19220 San Jose Ave, CA 91748. Phone: (626) 965-0668.


Calibration by the user is recorded in the wrench memory and voids factory certification.

Equipment Required: Precision test bars and certified calibration weights, or another torque source, accurate to 1/2% of reading.

Maintenance/Service: Clean torque wrench by wiping with a damp cloth. DO NOT use solvents, thinners or engine cleaners. DO NOT immerse in anything. Service, repair, and calibration are to be done by CDI Torque Products Service Centers only.

Certification: This torque wrench, as calibrated at the factory, is certified to meet the accuracy specified in International Standard ISO 6789 and was calibrated on a torque standard traceable to the National Institute of Standards Technology (N.I.S.T.).

NOTE: If the display shows “Err0” at power on, the wrench is damaged and must be returned for repair.

Battery Replacement: Replace with two “CR123” Lithium cells only. (Available anywhere)

Micro-Adjustable “Click Type” Metal Handle Torque Wrenches

  • Rugged
  • Accurate, ± 4% clockwise, ± 6% counterclockwise @ 20% of the
  • Easy to Operate
  • Durable
  • All parts made from alloy tool steel for long life. Accuracy meets or exceeds all applicable government specifications.
  • Exposed Scale
  • Positive lock with spring loaded pull down lock Super rugged knurled metal for industrial use. Pull lock ring down and turn the handle to adjust reading. The positive locking device cannot be jarred into unlock position.
  • All wrenches meet or exceed ANSI B 14M or GGG-S-686, whichever applies.
  • Feature a push button socket “quick release” mechanism (except 6448, 8447 and 8448).
  • All wrenches feature English scales primary and Newton meter
  • Micrometer “clicker” torque wrenches feature a distinct breaking action when the set torque is the breaking action and clicking noise is greatest at the upper part of the scale.
  • All wrenches will be shipped in fitted blow mold plastic storage boxes, except the 8447 and 8448, which will be shipped in a metal box
  • All wrenches include a “Certificate of Calibration ”

Electronic Torque Wrenches – Computorq II


  • Largest Storage Capacity Available – Up to 4000 torque values can be stored in the memory. An audible tone signal when memory is full.
  • Downloading Capacity – Computorq II is equipped to download individual torque values or store values in memory which can be directly downloaded to a printer/computer/data logger via RS232
  • Easy Set-Up – Target torque values (high and low percentages,+/- tolerances and torque engineering units) are easily programmed through the keypad and shown on the LCD.
  • Baud Rate – The Baud rate for downloading to a printer/computer/ data logger is adjustable. The factory set rate is 1200. Options are 300, 600, 1200, 2400, 4800 or 9600.
  • Audio Signal – An audio signal is emitted when the minimum acceptable preset torque value is reached or the upper torque limit is exceeded.
  • Visual Indicators – Bright green and red LEDs are standard indicators of high and low preset torque limits.
  • Overload-Protection – The red LED flashes, the audio buzzer sounds and “OVER” is displayed on the LED when the torque range of the wrench is exceeded.
  • Engineering Units – All seven basic engineering torque units are available on most Computorq II models (ft. lbs., in. lbs., in. oz., Nm, dNM, Mkg. or kg cm) and are easily selected through the keypad.
  • Displayed Torque Measurements – Torque measurements captured on the display remain until they are erased, sent to the wrench’s memory, or downloaded to an external device.
  • Recall of Torque Measurements – Up to 999 torque measurements can be reviewed by the operator, in a sequence of operation, by pressing the recall button.
  • Bar Graph – A bar graph is displayed on the LCD showing the relative position of applied torque to the preset torque range.


Anytime an adaptor, extension or universal is used with a torque wrench in such a way that the fastener distance is different than the torque wrench square drive distance, an adjustment to the set torque is required to get proper fastener torque.

Fastener torque equals torque wrench square drive torque. Wrench setting is equal to desired fastener torque.

Fastener torque equals torque wrench square drive torque. Wrench setting is equal to desired fastener torque

Fastener torque is greater than torque wrench square drive torque. The calculated setting will be lower than desired fastener torque.

Fastener torque is less than torque wrench square drive torque. The calculated setting will be higher than desired fastener torque.

When using wobble extension or a universal, do not exceed more than 15 degrees of offset from the perpendicular drive. Do not use a long extension with the flex-drive at full flex.