CLICKING TORQUE WRENCHES

Why is controlled fastener tightening important?

Anyone involved in modern engineering will already know how important controlled tightening is. To ensure safe, dependable threaded joints, clearly defined tightening forces are essential, irrespective of whether the forces to be applied are large or small (such as is the case with light-weight materials with a low yield point).

The decision on the correct tightening force is subject to a number of factors. These include the fastener’s thread pitch, the friction in the thread and the material under the nut or screw head. Once all the relevant factors have been taken into account, this results in the required tightening force that will ensure the bolted joint will not become loose even under dynamic loading. By the same token, this tightening force must not be too high as this can also cause the bolted joint to fail.

What exactly is torque?

Torque is a physical quantity in mechanics. The international unit of measure for moment of force, or torque, is the newton metre, Nm. Torque is defined as a force acting perpendicular to a moment arm. M = F x r

A torque wrench is constructed in such a way that it is operated by applying force to the handle. If the lever ratio is changed in any way, this will result in incorrect torque values – a key issue that is referred to in the documentation for all ELORA torque wrenches.

Screw tightening using torque and tightening angle

In many cases, it is sufficient to tighten a bolt or screw to a certain defined torque. To ensure the application of accurate, defined tightening forces, special expanding screws are used. Screws of this type may only be used once. In the first stage, they are tightened to a defined torque and then a specified tightening angle is applied to tighten the screw beyond the elastic limit of the bolt. This enables a much more accurate tightening force to be achieved.

In addition to an ELORA torque wrench, angle controlled tightening requires a mechanical angle measuring instrument (ELORA no. 2184…).

Conformity Test and Calibration

The DIN EN ISO 6789:2017 has been divided into 2 parts. Part 1 determines requirements for construction and manufacturing, including contents of the declaration of conformity.

Part 2, above all, determines the requirements for traceable calibration certificates and includes a procedure to calculate measurement uncertainties.

The ELORA Torque Wrench Calibration Laboratory is covering both parts. Each torque wrench will be delivered with a declaration of conformance, because for most users, this is absolutely sufficient.

In case of not being differently mentioned within inspection equipment monitoring, the DIN EN 6789:2017 specifies a working life of 12 months or 5000 load changes being the interval for conformity test or calibration. The interval starts with the first use of the torque tool.

CLICKING TORQUE WRENCHES

2179- TORQUE WRENCH, WITH VERNIER SCALE

Product features

  • Broad range of applications
  • High degree of availability
  • Highly economical
  • Very service-friendly
  • Complies with DIN EN ISO 6789:2017
  • for controlled torque application from 10 – 335 Nm
  • main unit Nm with Nonius, secondary unit ft.lb.
  • safe locking of the adjusted torque value by securing button at the handle end
  • ELORA-No. 2179-S: exchanging the locking knob through the safety cap, the torque can be fixed tamper-resistant
  • for clockwise fixing
  • with robust, matt steel tube
  • fine tooth ratchet, smallest possible swivel angle 8°
  • very noticeable and hearable (click) signal
  • nonslip QUATROLIT®-2C-handle
  • according to EN ISO 6789:2017 Part 1, Typ II Class A
  • with traceable declaration of conformance
  • tripping accuracy ±3%

Torque Wrench, With Vernier Scale

Number Head Measuring range
Nm
Measuring range
ft.lb.
l/mm Pieces Weight/g Stück Gewicht/g
2179-60 3/8“ Umschaltknarre Thg10-60 0,25 Thg9-45 4 390 1 1250
2179-125 1/2“ Umschaltknarre 25-125 0,25 20-90 5 440 1 1230
2179-200 1/2“ Umschaltknarre 40-200 0,5 30-150 10 440 1 1366
2179-335 1/2“ Umschaltknarre 65-335 0,75 50-250 10 525 1 1465
2179-S Safety cap for model 2179 | 2070 | 2080 | 2033 | 2034 1 10

High availability and economy

ELORA has succeeded in achieving the ambitious objective of increasing the periods of effective use between readjustments to considerably more than 5000 “clicks” with no errors or loss in accuracy. Extensive long-term tests have demonstrated convincingly that the torque wrenches managed 8000 “clicks” with no problems.

ELORA – Declaration of Conformity

Each hand operated torque tool leaves our works with a declaration of conformance according to DIN EN ISO 6789:2017 Part 1.
ELORA services and controls your torque wrenches quickly and cost-saving. On demand also according to DIN EN ISO 6789:2017 part 2.

Wide range of applications

The torque wrench must work accurately even when subjected to extreme fluctuations in temperature and in environments in which dust and moisture are commonly encountered. This is why ELORA torque wrenches are intensively tested under all conceivable operating conditions at ELORA’s own calibration laboratory. The ELORA torque wrenches have all passed the tests with flying colours.

A particularly important feature is the temperature from -15 to +40°C. The design of the tool, the torquing mechanism and the choice of components and materials are further evidence of ELORA’s innovative approach to professional products enabling efficient working.

This is how you can fix the torque tamper-resistant

Adjust release torqueAdjust release torque Fix with locking knobFix with locking knob Untwist locking knobUntwist locking knob Tamper-resistant closing by safety capTamper-resistant closing by safety cap No nondestructive removal of the safety capNo nondestructive removal of the safety cap

2185- TORQUE WRENCH 1/2 inch

  • for controlled torque application from 20 – 350 Nm / 15 – 250 ft.-lb.
  • dual measurement scale for Nm and ft.lb.
  • scale slider and window with magnifier for quick setting of the target torque value
  • locking screw for safe locking of the set torque value
  • for clockwise fixing
  • with robust, matt steel tube
  • all models with fine tooth, reversible ratchet
  • very noticeable and audible (click) signal
  • according to DIN EN ISO 6789:2017 Part 1, Typ II Class A
  • with traceable declaration of conformance
  • tripping accuracy ±4%

2185-60 Torque Wrench 1/2 inch

Number Head Measuring range
Nm
Measuring range
ft.lb.
l/mm Pieces Weight/g
2185-100 1/2″ Reversible ratchet 20-100 15-80 450 1 1473
2185-200 1/2″ Reversible ratchet 40-200 30-150 450 1 1432
2185-350 1/2″ Reversible ratchet 60-350 42-250 590 1 1705

2130 – 2160 TORQUE WRENCH

  • for controlled torque application from 2,5 – 2000 Nm
  • quad measurement scale for Nm, kgm, in-lb and ft-lb
  • click type torque wrench with very noticeable and audible (‚‘click‘‘) signal
  • bi-directional fixing by turning the torque wrench
  • extra solid, matt-chrome plated steel construction
  • adjustable and safe lockable by
  • crank and the top end of the handle
  • according to DIN EN ISO 6789:2017 Part 1, Typ II Class A
  • with traceable declaration of conformance
  • tripping accuracy ±4%

2130-2160 Torque Wrench

Number Measuring
range Nm
Gradution
Nm
Measuring
range kgm
Gradution
kgm
Measuring
range in.lb.
Gradution
in.lb.
Measuring
range ft.lb.
Gradution
ft.lb.
l/mm Pieces Weight/g
2130-11 3/8“ 2,5-11 0,5 0,3-1,2 0,2 20-100 10 2-8 1 338 1 672
2130-33 3/8“ 7-33 1 0,7-3,4 0,1 60-300 10 5-24 1 425 1 813
2130-68 3/8“ 12-68 2 1,2-7 0,2 100-600 20 10-50 2 500 1 1100
2140-68 1/2“ 14-68 2 1,4-7 0,2 125-600 20 10-50 2 500 1 1114
2140-135 1/2“ 30-135 5 3-14 1 250-1200 50 40-160 2 556 1 1974
2140-225 1/2“ 50-225 10 5-23 1 400-2000 50 40-160 5 600 1 2180
2140-330 1/2“ 70-330 10 7-35 1 600-3000 100 50-250 10 805 1 3850
2150-810 3/4“ 200-800 20 22-82 2 1800-7200 200 140-600 20 1070 1 7150
2160-940 1“ 200-1000 20 22-100 2 1800-8850 200 140-740 20 1400 1 13800
2160-2000 1“ 500-2000 50 50-200 5 4500-17500 500 350-1500 50 1410 1 18000

2070- TORQUE WRENCH 3/4 inch WITH VERNIER SCALE

  • for controlled torque application from 100 – 1000 Nm
  • main measurement unit for Nm with vernier scale, auxiliarymeasurement unit for ft.-lb.
  • Safe locking of the adjusted torque value by securing button at the handle end
  • ELORA-No. 2179-S: exchanging the locking knob through the safety cap, the torque can
  • bi-directional fixing by turning the torque wrench
  • push through ratchet 3/4 inch with smallest swivel angle 6°
  • with robust, matt steel tube
  • with very noticeable and audible (click) signal
  • nonslip QUATROLIT®-2C-handle
  • according to EN ISO 6789:2017 Part 1, Typ II Class A
  • with traceable declaration of conformance
  • tripping accuracy ±4%

Number Head Measuring
range Nm
Graduation
Nm
Measuring
range ft.lb.
Graduation
ft.lb.
l/mm Pieces Weight/g
2070-500 3/4“ Push through ratchet 100-500 25 80-400 1,25 910 1 3600
2070-800 3/4“ Push through ratchet 160-800 40 120-600 2 1220 1 4550
2070-1000 3/4“ Push through ratchet 200-1000 50 150-750 2,5 1230 1 4550
2179-S Safety cap for model 2179 | 2070 | 2080 | 2033 | 2034 1 10

2080-2100 TORQUE WRENCH 1 inch WITH VERNIER SCALE

  • for controlled torque application from 400 – 2100 Nm
  • main measurement unit for Nm with vernier scale, auxiliary measurement unit for ft.-lb.
  • Safe locking of the adjusted torque value by securing button at the handle end
  • ELORA-No. 2179-S: exchanging the locking knob through the safety cap, the torque can be fixed tamper-resistant
  • for clockwise fixing
  • reversible ratchet 1 inch with smallest swivel angle 6°
  • with very noticeable and audible (click) signal
  • Extension Bar with nonslip QUATROLIT®-2C-handle
  • according to EN ISO 6789:2017 Part 1, Typ II Class A
  • with traceable declaration of conformance
  • tripping accuracy ±4%

2080-2100 torque wrench 1 inch with vernier scale

Number Head Measuring
range Nm
Graduation
Nm
Measuring
range ft.lb.
Graduation
ft.lb.
l/mm Pieces Weight/g
2080-2100 1“ Reversible ratchet 400-2100 100 300-1500 5 1945 1 10750
2179-S Safety cap for model 2179 | 2070 | 2080 | 2033 | 2034 1 10

CLICKING TORQUE SCREWDRIVERS

2178-20 TORQUE RATCHET, 1/4 inch WITH VERNIER SCALE

  • for controlled torque application from 4 – 20 Nm
  • main unit Nm, secondary unit ft.lb, both with Nonius
  • safe locking of the set torque value
  • for clockwise fixing
  • with robust, matt-chrome plated steel tube
  • reversible ratchet
  • very noticeable and audible (click) signal
  • according to DIN EN ISO 6789:2017 Part 1, Typ II Class A
  • Classified according to DIN EN ISO 6789: 2003 Type II Class A
  • with traceable declaration of conformance
  • Tripping accuracy ±4%

2178-20 torque ratchet, 1/4 inch with vernier scale

Number Measuring
range Nm
Graduation
Nm
Measuring
range ft.lb.
Graduation
ft.lb.
l/mm Pieces Weight/g
2178-20 1/4“ 4-20 0,1 3,3-14,4 0,07 320 1 900

2011-1000 TORQUE SCREWDRIVER, 1/4 inch WITH VERNIER SCALE

  • for controlled torque application from 2 – 10 Nm
  • a disengaging coupler indicates the achievement of the release moment and prevents overtightening of the screw
  • ¼ inch internal hexagon socket for ¼ inch bits according to DIN 3126-C 6,3
  • bi-directional tightening
  • safe locking of the adjusted torque value by securing button at the handle end
  • ¼ inch square socket at the end of the screwdriver ensuring support of power transmission
  • according to EN ISO 6789:2017 Part 1, Typ II Class D
  • with traceable declaration of conformance
  • tripping accuracy ±6% from the set value

2011-1000 torque screwdriver 1.4 inch with vernier scale

Number Measuring
range Nm
Graduation
Nm
l/mm Pieces Weight/g
2011-1000 2-10 0,2 160 1 330

CLICKING TORQUE WRENCHES AND INSERT TOOLS

2033-20 TORQUE WRENCHES WITH RECTANGULAR INTAKE

  • for use with ELORA interchangeable spanner heads
  • main measurement unit for Nm with vernier scale, secondary measurement unit for ft-lb
  • safe locking of the set torque value
  • bi-directional fixing by turning the torque wrench
  • with robust, matt steel tube
  • with very noticeable and audible (click) signal
  • nonslip QUATROLIT®-2C-handle
  • factory depth gauges: Ss = 17,5 mm (9 x 12 mm) and Ss = 25 mm (14 x 18 mm)
  • according to DIN EN ISO 6789:2017 Part 1, Typ II Class A
  • with traceable declaration of conformance
  • tripping accuracy ±4%

2033-20 torque wrenches with rectangular intake

Number Drive mm Is mm Measuring
range Nm
Graduation
Nm
Measuring
range in.lb.
Graduation
in.lb.
l/mm Pieces Weight/g
2033-20 9×12 282,5 4-20 0,1 39,8-172,6 0,9 315 1 595

2034- TORQUE WRENCH WITH RECTANGULAR INTAKE

  • for use with ELORA interchangeable spanner heads
  • main measurement unit for Nm with vernier scale, secondary measurement unit for ft.-lb.
  • safe locking of the adjusted torque value by securing button at the handle end
  • ELORA-No. 2179-S: exchanging the locking knob through the safety cap, the torque can be fixed tamper-resistant
  • for clockwise and anti-clockwise tightening by turning the torque wrench
  • with robust, matt steel tube
  • with very noticeable and audible (click) signal
  • nonslip QUATROLIT®-2C-handle
  • factory depth gauges: Ss = 17,5 mm (9 x 12 mm) and Ss = 25 mm (14 x 18 mm)
  • according to DIN EN ISO 6789:2017 Part 1, Typ II Class A
  • with traceable declaration of conformance
  • tripping accuracy ±4%

2034- torque wrench with rectangular intake

Number Drive
mm
Is mm Measuring
range Nm
Graduation
Nm
Measuring
range ft.lb.
Graduation
ft.lb.
l/mm Pieces Weight/g
2034-60 9×12 314,5 10-60 0,25 9-45 4 345 1 1000
2034-125 9×12 370,5 25-125 0,25 20-90 5 438 1 900
2034-200 14×18 410,0 40-200 0,5 30-150 10 455 1 1198
2034-335 14×18 470,0 65-335 0,75 50-250 10 515 1 1305

Expert knowledge on insert tools

When using insert tools, it is essential to take into account the stated extension.

If the extension for the insert tool to be used is exactly the same as the work calibration extension (Ss = 17.5 mm for 9 x 12 mm mounts and Ss = 25 mm for 14 x 18 mm mounts) of the torque wrench, the torque level you have set will be correct.

Where insert tools having a different extension value are to be used, the set torque Mi will have to be calculated to ensure that the required target torque (Ms) is, in fact, achieved.

This can be done using the following formula:

Where:
Ms target torque
ls lever length of the torque wrench + works calibration extension
Sv extension of the insert tool
Ss works calibration extension (Ss = 17.5 mm for 9 x 12 mm mounts and Ss =25 mm for 14 x 18 mm mounts)
Mi torque setting on the wrench

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