Pneumatic torque wrench

Pneumatic torque wrench DEFAULT

Surkon Makina Sanayi ve Ticaret Ltd. Şti.

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PTM-72 tools use the same ‘twin motor’ handle as the PTM-52 but fitted with a durable 72mm gearbox to allow higher torque outputs. The ‘twin motor’ concept gives the benefit of high run-down speeds while adding very little to the size and weight of the tool.

  • norbar-ptm-series-pneumatic-torque-wrench-with-digital-display-01Fast - 1000 N.m version has a free speed of 122 rpm.
  • Light weight - 2000 N.m stall tool weighs just 6.2 kg.
  • Quiet - less than 85 db (A) when under load.
  • Non impacting - low vibration levels.
  • Square drive is quickly and easily replaceable.
  • On Bi-directional tools, the direction control knob is locked
    while the tool is running to prevent accidental damage to the gearbox.
  • ‘Soft Start’ trigger control aids socket location 
  • For safety, gearbox can rotate independently from the handle so that
    reaction forces are not transmitted back to the operator.
  • 1” square drive available for the 1000 N.m version, Part No. 18492.

norbar-ptm-series-pneumatic-torque-wrench-with-digital-display-03norbar-ptm-series-pneumatic-torque-wrench-with-digital-display-02norbar-ptm-series-pneumatic-torque-wrench-with-digital-display-04norbar-ptm-series-pneumatic-torque-wrench-with-digital-display-05

Model NoBirimPTM52-500BICPTM52-800BICPTM72-1000BICPTM72-1350BICPTM72-2000BIC
Part No**18110.B0618111.B0618112.B0618113.B0818114.B08
Capacity (Min-Max)Nm100-500160-800200-1000270-1350400-2000
Capacity (Min-Max)Lbf.ft74-370118-590147-738200-1000295-1475
Square Drive
inch3/4"3/4"3/4"1"1"
Free Speedrpm2241481228658
Bi-directional Operation**availableavailableavailableavailableavailable
Tool Weightkg4,94,97,47,47,8
Reaction Arm Weightkg0,850,850,70,70,7
Air Pressure (Max)bar6,36,36,36,36,3
Air Consumptionltr/sec1919191919
Tool Length (A)mm397397422422453

norbar-ptm-series-pneumatic-torque-wrench-with-digital-display-06norbar-ptm-series-pneumatic-torque-wrench-with-digital-display-07

The integration of electronic torque measurement and control into the PTM-72 Series is achieved with the minimum impact on overall tool size and weight. The actual applied torque is accurately measured at the output of the tool meaning that a repeatability of ±2% can be guaranteed.

Shut-Off, Internal Control - these tools include a torque transducer, easy to read LED display, control panel and a solenoid valve to shut off the air supply once the desired torque has been reached.The tolerance band within which the bolt must be tightened can be set on the tool handle control panel.When the tool is operated, the actual applied torque is displayed along with one of three coloured LEDs to indicate a low, within tolerance or high result.The tool can be operated in either N.m or lbf.ft.

norbar-pneutorque-applicationnorbar-pneutorque-led-screennorbar-pneutorque-delivery-content

Sours: https://www.surkontools.com/pneumatic-torque-wrench-with-digital-display

Torque wrench

A torque wrench is a tool used to apply a specific torque to a fastener such as a nut, bolt, or lag screw. It is usually in the form of a socket wrench with special internal mechanisms.

A torque wrench is used where the tightness of screws and bolts is crucial. It allows the operator to set the torque applied to the fastener so it can be matched to the specifications for a particular application. This permits proper tension and loading of all parts. A torque wrench uses torque as a proxy for bolt tension. The technique suffers from inaccuracy due to inconsistent or uncalibrated friction between the fastener and its mating hole. Measuring bolt tension (indirectly via bolt stretch) is actually what is desired, but often torque is the only practical measurement which can be made.

Torque screwdrivers and torque wrenches have similar purposes and mechanisms.

History[edit]

Conceptual illustration of J. H. Sharp's patented wrench

The first patent for a torque wrench was filed by John H. Sharp of Chicago in 1931. This wrench was referred to as a torque measuring wrench and would be classified today as an indicating torque wrench.[1]

In 1935, Conrad Bahr and George Pfefferle patented an adjustable ratcheting torque wrench. The tool featured audible feedback and restriction of back-ratcheting movement when the desired torque was reached.[2] Bahr, who worked for the New York City Water Department, was frustrated at the inconsistent tightness of flange bolts he found while attending to his work. He claimed to have invented the first torque limiting tool in 1918 to alleviate these problems.[3] Bahr's partner, Pfefferle, was an engineer for S.R. Dresser Manufacturing Co and held several patents.

Types[edit]

Beam[edit]

Beam-type torque wrench. The indicator bar remains straight while the main shaft bends proportionally to the force applied at the handle.

Detailed view of the torque display scale on a beam type torque wrench. This shows a torque of about 160 in.lbf or 18 N·m.

The most basic form of torque wrench consists of two beams. The first is a lever used to apply the torque to the fastener being tightened and serves also as the handle of the tool. When force is applied to the handle it will deflect predictably and proportionally with said force in accordance with Hooke's law. The second beam is only attached at one end to the wrench head and free on its other, this serves as the indicator beam. Both of these beams run parallel to each other when the tool is at rest, with the indicator beam usually on top. The indicator beam's free end is free to travel over a calibrated scale attached to the lever or handle, marked in units of torque. When the wrench is used to apply torque, the lever bends and the indicating beam stays straight. Thus, the end of the indicating beam points to the magnitude of the torque that is currently being applied.[4] This type of wrench is simple, inherently accurate, and inexpensive.

The beam type torque wrench was developed in between late 1920s and early 1930s by Walter Percy Chrysler for the Chrysler Corporation and a company known as Micromatic Hone. Paul Allen Sturtevant—a sales representative for the Cedar Rapids Engineering Company at that time—was licensed by Chrysler to manufacture his invention. Sturtevant patented the torque wrench in 1938 and became the first individual to sell torque wrenches.[5]

A more sophisticated variation of the beam type torque wrench has a dial gauge indicator on its body that can be configured to give a visual indication, or electrical indication, or both when a preset torque is reached.[6][7]

Deflecting beam[edit]

The dual-signal deflecting beam torque wrench was patented by the Australian Warren and Brown company in 1948.[8] It employs the principle of applying torque to a deflecting beam rather than a coil spring. This is claimed to help prolong the accuracy of the wrench throughout its working life, with a greater safety margin on maximum loading and provides more consistent and accurate readings throughout the range of each wrench. The operator can both hear the signal click and see a visible indicator when the desired torque is reached.[9]

Simplified diagram of a deflecting beam torque wrench

The wrench functions in the same general way as an ordinary beam torque wrench. There are two beams both connected to the head end but only one through which torque is applied. The load carrying beam is straight and runs from head to handle, it deflects when torque is applied. The other beam (indicating beam) runs directly above the deflecting beam for about half of the length then bends away to the side at an angle from the deflecting beam. The indicating beam retains its orientation and shape during operation. Because of this, there is relative displacement between the two beams. The deflecting beam torque wrench differs from the ordinary beam torque wrench in how it utilizes this relative displacement. Attached to the deflecting beam is a scale and onto that is fitted a wedge which can be slid along the length of the scale parallel to the flexing beam. This wedge is used to set the desired torque. Directly facing this wedge is the side of the angled indicating beam. From this side protrudes a pin, which acts as a trigger for another pin, the latter pin is spring loaded, and fires out of the end of the indicating beam once the trigger pin contacts the adjustable wedge. This firing makes a loud click and gives a visual indication that the desired torque has been met. The indicator pin can be reset by simply pressing it back into the indicating beam.[9][10]

Slipper[edit]

Simplified principle of a slipper type head

A slipper type torque wrench consists of a roller and cam (or similar) mechanism. The cam is attached to the driving head, the roller pushes against the cam locking it in place with a specific force which is provided by a spring (which is in many cases adjustable). If a torque which is able to defeat the holding force of the roller and spring is applied, the wrench will slip and no more torque will be applied to the bolt. A slipper torque wrench will not overtighten the fastener by continuing to apply torque beyond a predetermined limit.[11]

Click[edit]

Click-type torque wrench with socket attached, adjusted by turning the knurled handle

Conceptual drawing of the operation of a click type torque wrench

A more sophisticated method of presetting torque is with a calibrated clutch mechanism. One common form uses a ball detent and spring, with the spring preloaded by an adjustable screw thread, calibrated in torque units. The ball detent transmits force until the preset torque is reached, at which point the force exerted by the spring is overcome and the ball "clicks" out of its socket. This design yields greater precision as well as giving tactile and audible feedback. The wrench will not start slipping once the desired torque is reached, it will only click and bend slightly at the head; the operator can continue to apply torque to the wrench without any additional action or warnings from the wrench.[12][13]

A number of variations of this design exist for different applications and different torque ranges. A modification of this design is used in some drills to prevent gouging the heads of screws while tightening them. The drill will start slipping once the desired torque is reached.

"No-hub" wrench[edit]

These are specialized torque wrenches used by plumbers to tighten the clamping bands on hubless soil pipe couplings. They are usually T-handled wrenches with a one-way combination ratchet and clutch. They are preset to a fixed torque designed to secure the coupling adequately but insufficient to damage it.[14]

Electronic torque wrenches[edit]

See also: Battery torque wrench

With electronic (indicating) torque wrenches, measurement is by means of a strain gauge attached to the torsion rod. The signal generated by the transducer is converted to the required unit of torque (e.g. N·m or lbf·ft) and shown on the digital display. A number of different joints (measurement details or limit values) can be stored. These programmed limit values are then permanently displayed during the tightening process by means of LEDs or the display. At the same time, this generation of torque wrenches can store all the measurements made in an internal readings memory. This readings memory can then be easily transferred to a PC via the interface (RS232) or printed straight to a printer. A popular application of this kind of torque wrench is for in-process documentation or quality assurance purposes. Typical accuracy level would be ±0.5% to 4%.

Programmable electronic torque / angle wrenches[edit]

Torque measurement is conducted in the same way as with an electronic torque wrench but the tightening angle from the snug point or threshold is also measured. The angle is measured by an angle sensor or electronic gyroscope. The angle measurement process enables joints which have already been tightened to be recognized. The inbuilt readings memory enables measurements to be statistically evaluated. Tightening curves can be analyzed using the software via the integrated tightening-curve system (force/path graph). This type of torque wrench can also be used to determine breakaway torque, prevail torque and the final torque of a tightening job. Thanks to a special measuring process, it is also possible to display the yield point (yield controlled tightening). This design of torque wrench is highly popular with automotive manufacturers for documenting tightening processes requiring both torque and angle control because, in these cases, a defined angle has to be applied to the fastener on top of the prescribed torque (e.g. 50 N⋅m or 37 lbf⋅ft + 90° – here the 50 N⋅m or 37 lbf⋅ft means the snug point/threshold and +90° indicates that an additional angle has to be applied after the threshold).

In 1995, Saltus-Werk Max Forst GmbH applied for an international patent for the first electronic torque wrench with angle measurement which did not require a reference arm.

Mechatronic torque wrenches[edit]

Mechatronic torque wrench

Torque measurement is achieved in the same way as with a click-type torque wrench but, at the same time, the torque is measured as a digital reading (click and final torque) as with an electronic torque wrench. This is, therefore, a combination of electronic and mechanical measurements. All the measurements are transferred and documented via wireless data transmission. Users will know they have achieved the desired torque setting when the wrench "beeps".

Hydraulic torque wrenches[edit]

Main article: Hydraulic torque wrench

Hydraulic torque wrenches are used for tightening large torques with high accuracy. They are used for aviation and heavy machinery assembly and are specialized tools.[15][16] Their general construction varies depending on manufacturer and torque requirement. Generally, they consist of at least one hydraulic cylinder operating a drive head ratchet. The cylinder extends, pushing the drive head round via the pawls, and then retracts freely over the ratcheting teeth. The process is repeated until the desired torque is met. Smaller hydraulic torque wrenches have a reaction arm built into the tool, which rests against another fastener or part of the assembly to prevent rotation when torque is being applied. Larger models require other fixing arrangements in order to prevent rotation.[17][18][19]

Pneumatic torque wrench[edit]

Pneumatic torque wrench setting torque on bolts.

A pneumatic torque wrench is a planetary torque multiplier or gearbox that is mated to a pneumatic air motor. At the end of the gearbox, a reaction device absorbs the torque and allows the tool operator to use it with very little effort. The torque output is adjusted by controlling the air pressure.

These planetary torque multiplier gearboxes have multiplication ratios up to 125:1 and are primarily used where accurate torque is required on a nut and bolt, or where a stubborn nut needs to be removed. For critical applications, the "final" torque is often applied with a high-accuracy tool.

Unlike a standard impact wrench, which it resembles, a pneumatic torque wrench is driven by continuous gearing, and not by the hammers of an impacting wrench, so it has very little vibration.

The pneumatic torque wrench was invented in Germany in the early 1980s.

Torque capabilities of pneumatic torque wrenches range from 118 Nm, up to a maximum of 47,600 Nm.

A pneumatic motor using compressed air is the most common source of power for pneumatic torque wrenches, which typically require 20–25 CFM.

Torque wrench standardization[edit]

ISO[edit]

The International Organization for Standardization maintains standard ISO 6789. This standard covers the construction and calibration of hand-operated torque tools. They define two types of torque tool encompassing twelve classes, these are given by the table below. Also given is the percentage allowable deviation from the desired torque.[20][21]

Torque wrench types Torque wrench tolerance
Type Class Description ≤ 10 Nm >10 Nm
Type 1: Indicating Class A Wrench with torsion or flexing bar ±6%
Class B Wrench with rigid body and indicator ±6% ±4%
Class C Wrench with rigid body and electronic measurement ±6% ±4%
Class D Screwdriver with indicator ±6%
Class E Screwdriver with electronic measurement ±6% ±4%
Type 2: Setting Class A Adjustable wrench with indicator ±6% ±4%
Class B Fixed torque wrench ±6% ±4%
Class C Adjustable wrench without indicator ±6% ±4%
Class D Adjustable screwdriver with indicator ±6%
Class E Fixed screwdriver ±6%
Class F Adjustable screwdriver without indicator ±6%
Class G Adjustable wrench with flexing bar and indicator ±6%

The ISO standard also states that even when overloaded by 25% of the maximum rating, the tool should remain reliably usable after being re-calibrated. Re-calibration for tools used within their specified limits should occur after 5000 cycles of torquing or 12 months, whichever is soonest. In cases where the tool is in use in an organization which has its own quality control procedures, then the calibration schedule can be arranged according to company standards.[20][21]

Tools should be marked with their torque range and the unit of torque as well as the direction of operation for unidirectional tools and the maker's mark. If a calibration certificate is provided, the tool must be marked with a serial number that matches the certificate or a calibration laboratory should give the tool a reference number corresponding with the tool's calibration certificate.[20][21]

ASME[edit]

The American Society of Mechanical Engineers maintains standard ASME B107.300. This standard has the same type designation as the ISO standard with the addition of the type 3, (limiting) torque tool. This type will release the drive once the desired torque is met so that no more torque can be applied. This standard, however, uses different class designations within each type as well as additional style and design variants within each class. The standard also separates manual and electronic tools into different sections and designations. The ASME and ISO standards cannot be considered compatible. The table below gives some of the types and tolerances specified by the standard for manual torque tools. [22][23]

Torque wrench types Torque wrench tolerance
Type Class Style <20% max rating 20–100% max rating
Type 1: Indicating Class A: Deflecting beam Style 1: Plain scale ±0.8% ±4%
Style 2: Scale with signal
Style 3: Scale with memory
Class B: Deflecting beam, changeable head Style 1: Plain scale
Style 2: Scale with signal
Style 3: Scale with memory
Class C: Rigid housing Style 1: Plain scale
Style 2: Scale with signal
Style 3: Scale with memory
Class D: Rigid housing, changeable head Style 1: Plain scale
Style 2: Scale with signal
Style 3: Scale with memory
Class E: Screwdriver, indicating Style 1: Plain scale
Style 2: Scale with signal
Type 2: Setting[note 1]Class A: With graduation Style 1: Without ratchet ±0.8% ±4%
Style 2: With ratchet ±0.8% ±4%
Style 3: Changeable head ±0.8% ±4%
Style 4: Flexible head with ratchet See standard
Class B: Without graduation Style 1: Without ratchet ±0.8% ±4%
Style 2: With ratchet ±0.8% ±4%
Style 3: Changeable head ±0.8% ±4%
Style 4: Flexible head with ratchet See standard
Type 3: Limiting Class A: Screwdriver Style 1: Without graduation ±1.2% ±4%
Style 2: With graduation
Class B: T handle Style 1: Without graduation
Style 2: With graduation

Tools should be marked with the model number of the tool, the unit of torque and the maker's mark. For unidirectional tools, the word "TORQUES" or "TORQUE" and the direction of operation must also be marked.[22]

Using torque wrenches[edit]

Precision[edit]

Click type torque wrenches are precise when properly calibrated—however the more complex mechanism can result in loss of calibration sooner than the beam type, where there is little to no malfunction, (however the thin indicator rod can be accidentally bent out of true). Beam type torque wrenches are impossible to use in situations where the scale cannot be directly read—and these situations are common in automotive applications. The scale on a beam type wrench is prone to parallax error, as a result of the large distance between indicator arm and scale (on some older designs). There is also the issue of increased user error with the beam type—the torque has to be read at every use and the operator must use caution to apply loads only at the floating handle's pivot point. Dual-beam or "flat" beam versions reduce the tendency for the pointer to rub, as do low-friction pointers.

Extensions[edit]

The use of cheater bars that extend from the handle end can damage the wrench, so only manufacturer specified equipment should be used.[24]

Diagrammatic torque wrench with extensions. Showing lengths and torques referenced in the section text.

Using handle or socket extensions requires no adjustment of the torque setting.[25]

Using a crow's foot or similar extension requires the use of the following equation:[25][26][27]

{\displaystyle T_{w}={\frac {T_{d}A}{A+B}}}

using a combination of handle and crow's foot extensions requires the use of the following equation:[25]

{\displaystyle T_{w}={\frac {T_{d}(A+C)}{A+B+C}}}

where:

These equations only apply if the extension is colinear with the length of the torque wrench. In other cases, the distance from the torque wrench's head to the bolt's head, as if it were in line, should be used. If the extension is set at 90° then no adjustment is required. These methods are not recommended except for extreme circumstances.[25]

Storage[edit]

For click (or other micrometer) types, when not in use, the force acting on the spring should be removed by setting the scale to its minimum rated value in order to prevent permanent set in the spring.[28][29] Never set a micrometer style torque wrench to zero as the internal mechanism requires a small amount of tension in order to prevent components shifting and reduction of accuracy.[28]

Calibration[edit]

As with any precision tool, torque wrenches should be periodically re-calibrated. As previously stated, according to ISO standards calibration should happen every 5000 operations or every year, whichever comes first.[20][21] It is possible that torque wrenches can fall up to 10% out of calibration in the first year of use.[23]

Calibration, when performed by a specialist service which follows ISO standards, follows a specific process and constraints. The operation requires specialist torque wrench calibration equipment with an accuracy of ±1% or better. The temperature of the area where calibration is being performed should be between 18 °C and 28 °C with no more than a 1 °C fluctuation and the relative humidity should not exceed 90%.[20]

Before any calibration work can be done, the tool should be preloaded and torqued without measure according to its type. The tool is then connected to the tester and force is applied to the handle (at no more than 10° from perpendicular) for values of 20%, 60% and 100% of the maximum torque and repeated according to their class. The force should be applied slowly and without jerky or irregular motion. The table below gives more specifics regarding the pattern of testing for each class of torque wrench.[20][21]

Type Class Pre-calibration Calibration procedure
Type 1 All classes Preload once at the highest certified value 5 measurements in a row for all values
Type 2 Class A Preload five times at the highest certified value 5 measurements in a row for all values
Class B 5 measurements at nominal value
Class C 10 measurements in a row for all values
Class D 5 measurements in a row for all values
Class E 5 measurements at nominal value
Class F 10 measurements in a row for all values
Class G 5 measurements in a row for all values

While professional calibration is recommended, for some people it would be out of their means. It is possible to calibrate a torque wrench in the home shop or garage. The process generally requires that a certain mass is attached to a lever arm and the torque wrench is set to the appropriate torque to lift said mass. The error within the tool can be calculated and the tool may be able to be altered or any work done adjusted for this error.[30][31][32]

See also[edit]

Notes[edit]

  1. ^ASME Type 2 is somewhat complicated and cannot be elaborated on in depth without the table becoming too large for the article.

References[edit]

  1. ^US 2007880, Sharp John H., "Torque-measuring wrench", published July 9, 1935 
  2. ^US 2074079, Charles, Bahr Conrad & Pfefferle, George H., "Torque measuring wrench", published Mar 16, 1937 
  3. ^Fleming, Wes (Dec 18, 2017). "The Most Important Tool: Torque Wrench". Retrieved Jan 17, 2019.[better source needed]
  4. ^US 2231240, Zimmerman Herman W, "Torque measuring wrench", published Feb 11, 1941 
  5. ^"Official Sturtevant Richmont LinkedIn".
  6. ^US 2167720, Willard C Kress, "Torque-indicating wrench", published Aug 1, 1939 
  7. ^"DIAL TORQUE WRENCH REPAIR, MAINTENANCE AND TROUBLESHOOTING MANUAL"(PDF). CDI Torque Products. 2002.
  8. ^"Warren & Brown company history". Warren & Brown.
  9. ^ ab"Warren & Brown Precision Tools Catalogue"(PDF). Warren & Brown.
  10. ^"Deflecting beam torque wrench operating instructions"(PDF). Kincrome Professional Quality Tools.
  11. ^US 1860871, Wilfred A Pouliot, "Safety wrench", published May 31, 1932 
  12. ^Tegger. "How does a torque wrench work?". The Unofficial Honda / Acura Usenet FAQ. Archived from the original on 2016-03-03.
  13. ^US 4485703, Bosko Grabovac & Ivan Vuceta, "Torque wrench", published Dec 4, 1984 
  14. ^"Raptor No-Hub Torque Wrenches"(PDF). Raptor tools.
  15. ^"RT, RTX & Hydraulic Pumps - User guide & spare parts manual"(PDF). Rapid-Torq.
  16. ^"Hydraulic torque wrenches, computerized torque systems, calibration equipment brochure"(PDF). Advance Manufacturing Co.
  17. ^US 2961904, Anthony J Sergan, "Hydraulically actuated wrench", published Nov 29, 1960 
  18. ^US 4336727, John K. Junkers, "Hydraulic wrench for limited space application", published Jun 29, 1982 
  19. ^US 5056384, Anthony J Sergan, "Torque wrench", published Oct 15, 1991 
  20. ^ abcdefISO6789 - Assembly tools for screws and nuts. Hand torque tools. Requirements and test methods for design conformance testing, quality conformance testing and recalibration procedure. International Organization for Standardization. 2003.
  21. ^ abcdeSofia. "Torque Wrench Calibration Services". Calibrate.co.uk.
  22. ^ abASME B107.300-2010 (Incorporation of ASME B107.14, B107.28, and B107.29) Torque Instruments. The American Society of Mechanical Engineers. 2010.
  23. ^ abWarren Brown; Scott Hamilton; An Nguyen; Tom Smith (July 17–21, 2011). Field Calibration and Accuracy of Torque Wrenches. ASME 2011 Pressure Vessels & Piping Division Conference. The American Society of Mechanical Engineers.
  24. ^"Premium and Standard Manual Torque Wrenches Pre-Set and Adjustable"(PDF). ASG Jergens, Inc.
  25. ^ abcd"20-50-11". Boeing 737-200 maintenance manuals. 20. WikiLeaks. 2007. pp. 202–203.
  26. ^"Torque Wrench Extension Calculator". Norbar Torque.
  27. ^"Crowfoot adapters". Belknap Inc.
  28. ^ ab"The ten things you should know about your torque wrench". Norbar Torque. 2015.
  29. ^"Proper Torque Wrench Use and maintenance (Technical reference)"(PDF). Snap-on Tools. 2008.
  30. ^Various. "How to Calibrate a Torque Wrench". wikiHow. wikiHow.
  31. ^Ivy, Aubrey. "How to Calibrate a Torque Wrench". Helicopter Maintenance Magazine.
  32. ^Sleepy Gomez. "How-To Calibrate A Torque Wrench". rcramer.com.

External links[edit]

Sours: https://en.wikipedia.org/wiki/Torque_wrench
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3/4″ Pneumatic Torque Wrench [130-530 Ft/Lbs]

ESCO Professional Pneumatic Torque Wrenches are designed with precise accuracy through our surgical like gear production. Designed much like an impact wrench, once the trigger is pulled, the word “IMPACT” is the last thing that comes to mind. The ESCO Pneumatic Torque Wrench Series is a smooth running instrument that can apply a vast amount of torque in a continuous fluid manner; with torque accuracy of +/- 5%. Available in Torque Ranges from 78 ft/lbs. to 5,990 ft/lbs.

  • Hardened alloy steel for durability and long cycle life.
  • Multiple stage planetary gear systems with optimized tooth design.
  • Ultra-efficient air motor designed for easy maintenance.
  • One finger trigger control for forward and reverse.

 
Safety Warning

WARNING: This product contains chemicals known to the State of California to cause cancer or birth defects and/or other reproductive harm.

Sours: https://esco.net/products/esco-pneumatic-torque-wrench-10002-single-speed/
Pneumatic Torque Wrenches - Enerpac PTW-Series

AC3 Semi-Automatic

Direction

RoHSAssemblyAnglePneumaticGraduationTrigger


Features

  • Semi-Automatic Type: Air motor mounted on torque wrench allows for fast provisional tightening with accuracy of final tightening by torque wrench performed by hand.
  • This tool replaces conventional two-step tightening process of pneumatic tool followed by click torque wrench into one tool for greater efficiency.
  • Changing tightening torque is simple by using hex key to adjust scale on handle.
  • Index finger trigger engages motor. Release after provisional tightening then use hand force until torque wrench "clicks" at required torque setting.
  • Same features as A Series but with larger motor and higher provisional tightening torque.
  • Easy calibration performed on standard torque wrench tester such as Tohnichi's DOTE4-G. Since torque wrench is controlling final applied torque no joint simulator is required.
  • AC3 version features new ratchet square drive that accommodates anti-vibration sockets (not included) and improved trigger mechanism.
  • No reaction arm needed–Up to 180Nm (or equivalent) with no reaction force.
  • A drop in airline pressure will not affect applied torque.
  • LS version available with limit switch, which creates error-proofing system when used with CNA-4mk3 count checker (sold separately). When torque set is achieved, limit switch is triggered confirming tightening completion–no more missed fasteners!
  • ACFD and ACQSPLDC3 / ACQSPLD3 Models also output applied torque data (Special order upon request).
carousel 3
carousel 1

ACLS50N3 with Limit Switch

carousel 2

ACQSPLDC50N3 Wired with Data Output to CD5

carousel 4

ACFD50N3 Wireless Data Output to R-FHD

carousel 7

AC3 Features New Anti Vibration Ratchet (Shown with Socket not included)

Dimensions

product dimensions AC3

product dimensions A/AC180N3 A/ACLS180N3

product dimensions A/ACLS3 Limit switch
Sours: https://www.tohnichi.com/products/pneumatic-torque-wrench-AC3.htm

Torque wrench pneumatic

Pneumatic torque wrenches provide a simple to use solution for tough bolting jobs, when you want them done quickly and safely.

Productivity

  • High speed continuous rotation for constant torque output
  • Low friction planetary gearbox design minimizes wear and extends uptime

Safety

  • Ergonomic, low vibration design reduces fatigue and the risk of vibration related injuries for the operator
  • Low noise air motor provides quiet, consistent performance for indoor and outdoor applications

Convenience

  • Provided with standard reaction arm; wide assortment of custom arms and accessories are available
  • Available with or without Filter-Regulator-Lubricator (FRL)
  • Unique calibration certificate provided with each tool

The PTW Series is available as a complete kit: PTW1000C, PTW2000C, PTW3000C, PTW6000C

AME INTL Partners Logos
Sours: https://ameintl.net/products/ptw6000/
Hydraulic, Pneumatic, Electric Torque Wrenches - Training Webinar - Enerpac Academy

Do You Know The Two Different Types of Pneumatic Torque Wrenches?

Stall torque describes the torque produced by a mechanical device with output rotational speed equal to zero. The torque load could also cause the output rotational speed of a device to become zero, meaning it caused stalling. Stall torque nutrunners are very strong, compact and lightweight tools, ideal for maintenance precision bolting. To obtain the right tool's torque, the operator should set up the appropriate air pressure (all information is provided by the manufacturer in the tool's torque chart, available on the tool test certificate. The air pressure level can go from 21.7 PSI (1.5 Bars) to 90 PSI (6.3 Bars).)

This set-up allows the tool to be versatile, and offers a wide range of torque, which can go up to 7375.6 ft.lbs (10000 Nm); however, any kind of air pressure variations will modify the final torque applied. Therefore, in order to ensure that the set-up torque is reached, a check is recommended. 


Sours: https://www.cp.com/en/tools/expert-corner/blog/do-you-know-the-two-different-types-of-pneumatic-torque-wrenches

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Do You Know The Two Different Types of Pneumatic Torque Wrenches?

Stall torque describes the torque produced by a mechanical device with output rotational speed equal to zero. The torque load could also cause the output rotational speed of a device to become zero, meaning it caused stalling. Stall torque nutrunners are very strong, compact and lightweight tools, ideal for maintenance precision bolting. To obtain the right tool's torque, the operator should set up the appropriate air pressure (all information is provided by the manufacturer in the tool's torque chart, available on the tool test certificate. The air pressure level can go from 21.7 PSI (1.5 Bars) to 90 PSI (6.3 Bars).)

This set-up allows the tool to be versatile, and offers a wide range of torque, which can go up to 7375.6 ft.lbs (10000 Nm); however, any kind of air pressure variations will modify the final torque applied. Therefore, in order to ensure that the set-up torque is reached, a check is recommended. 


Sours: https://www.cp.com/en-us/tools/expert-corner/blog/do-you-know-the-two-different-types-of-pneumatic-torque-wrenches


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