Torque Measurement
wrench
Torque
Precise, controlled tightening for all your industrial assemblies. COFRAC-certified range of mechanical and electronic products.
- COFRAC
- Made in France
- Dedicated After sale
| 6 | available models |
| ±2 % | clamping precision |
- UAutomotive
- UAeronautics
- UPharmacy
- UAgri-food
- UCosmetics
- UPlumbing & HVAC
Our product line
ACRN Torque Wrenches
From preset clamping to electronic readout—the complete range for precise and repeatable control.
Preset · Closed eye
RSPK
Especially recommended for precisely tightening bolts in tight spaces.
- EVisible and audible trigger
- EFixed preset
- ERestricted clamping areas
Preset · Fixed fork
SPK
Recommended for tightening nuts in plumbing, air conditioning, and tight spaces.
- EAudible trigger
- EFixed-head fork
- EPlumbing & HVAC
Adjustable · Interchangeable head
LCK
Micrometer adjustment via a vernier scale, interchangeable head. High professional precision.
- EVernier micrometer adjustment
- EInterchangeable head
- EVisible and audible trigger
Adjustable · Professional ratchet
QLK
Professional micrometer adjustment and ratchet. High precision for general use.
- EMicrometer with vernier scale
- EProfessional ratchet
- EVisible and audible trigger
Mechanics · Dial
TOK
Torque control for tightening and loosening bottle caps, with an optional adapter sleeve.
- EDirect reading on the dial
- ETightening and loosening
- EAdapter Sleeve Option
Electronics · OLED
DTC-REV
High-precision OLED display. Backing up and exporting data. Tightening and loosening.
- EHigh-precision OLED display
- EData Backup & Export
- ETarget Pair Alert (Sound)
Comparison
Choosing the right model
| Criterion | RSPK | SPK | LCK | QLK | TOK | DTC-REV |
|---|---|---|---|---|---|---|
| Setting type | fixed | fixed | Micrometric | Micrometric | Dial | Electronics |
| Trigger | ✓ | ✓ | ✓ | ✓ | — | Audible alert |
| Real-time reading | — | — | — | — | ✓ | ✓ |
| Interchangeable head | — | — | ✓ | — | — | — |
| Export data | — | — | — | — | — | ✓ |
| Typical use | Narrow | Plumbing | Versatile | General Pro | Perfume Shop | Traceability |
ACRN Expertise
Why choose our torque wrenches ?
Precision guaranteed
±2 % across the entire measurement range. COFRAC accreditation is available upon request to meet your metrological requirements.
Complete range
6 models ranging from preset fixed clamping to traceable electronic control with data export.
Support technique
Dedicated experts to tailor the solution to your industrial processes. Support from selection through to commissioning.
After sales Normandy
Design, quality control, and after-sales service are all handled at our production facility in France.
COFRAC Calibration
Our torque wrenches can be recalibrated with a COFRAC-accredited certificate to meet your quality audit requirements.
Fast delivery
Most models are in stock. Fast shipping to minimize production downtime.
Applications & Industries
Torque wrenches : Applications
Controlled tightening is a requirement common to many industrial sectors. Whether it’s a mechanical assembly, capping during packaging, or tightening on a production line, the torque wrench ensures precision and repeatability operation after operation.
Sector 01
Automotive & Aerospace Industry
In the automotive and aerospace industries, torque is a fundamental safety parameter. Each bolt must be tightened to the exact specified torque : under-tightening can cause the bolt to loosen during operation, while over-tightening can fracture the part or damage the threads.
ACRN torque wrenches provide precise control at every stage of the assembly process, whether in the workshop or on the assembly line. The QLK and LCK models are particularly well-suited for precision clamping of mechanical parts, thanks to their micrometric adjustment and tactile release mechanism.
In the pharmaceutical and cosmetics industries, the cap-and-bottle combination determines the integrity of the packaging : a cap that is not tightened sufficiently compromises the product’s seal and sterility, while a cap that is too tight makes it difficult for the end consumer to open.
The TOK torque wrench is particularly well-suited for torque testing on perfume bottles and screw-top containers, thanks to its direct-read dial and optional adapter sleeve. To meet traceability requirements, the DTC-REV key allows you to export measured values.
Sector 02
Pharmacy & Cosmetics
Sector 03
Food & Beverage & Bottling
In the food industry, the torque of bottle caps directly affects food safety. A loosely secured cap can break the cold chain, cause oxidation, or compromise the best-by date. Conversely, if the cap is tightened too much, it becomes difficult for the end consumer to open.
Our torque wrenches allow you to set and monitor acceptable torque ranges for each packaging specification, whether tightening or loosening. They cover all types of packaging : bottles, vials, cans, and screw-top pumps.
In the mechanical engineering and plumbing industries, preset torque wrenches (SPK, RSPK) are used to tighten fittings, joints, and assemblies in confined spaces. The torque value is set by the operator, and the tool stops as soon as that value is reached, without the risk of exceeding it.
For maintenance or inspection work in the workshop, the QLK and LCK models with micrometer adjustment provide the flexibility needed to adapt the torque to each type of assembly, while maintaining an accuracy of ±2 %.
Sector 04
Mechanical & Plumbing
Frequently Asked Questions
Frequently asked questions about torque wrenches
01
What is a torque wrench ?
A torque wrench is a tool used to apply a precise torque to a fastener (nut, bolt, screw). It is essential to ensure safe assembly without the risk of under-tightening or overvoltage.
02
Why use a torque wrench ?
Using a wrench helps prevent over-tightening, which could damage components, shorten their service life, or compromise the safety of an installation.
03
How does a torque wrench work ?
A wrench works by applying a measured rotational force. Depending on the model, it can be mechanical (triggering at a preset torque) or electronic (digital reading of applied torque).
04
What are the different types of torque wrenches ?
Trigger wrench : A click indicates that the torque has been reached.
Direct-reading torque wrench : A dial or digital display shows the applied torque in real time.
Electronic key : increased accuracy and data logging.
Breakaway wrench : designed to prevent the torque from being exceeded.
05
How do you calibrate a torque wrench ?
Simply turn the handle or use the adjustment mechanism to set the desired torque value, using the engraved scale or the digital display. A lock may be required to secure the setting.
06
Can you loosen it with a torque wrench ?
No, a torque wrench is designed for precision tightening. Using the wrench to loosen may damage the internal mechanism.
07
When should a torque wrench be recalibrated ?
It is recommended that you recalibrate a key after 5 000 cycles of use or once a year, depending on how often it is used. Calibration ensures that the key remains accurate and reliable.
Guide
Industrial Torque Wrench : Buying Guide and Tips
A torque wrench is an essential tool for controlled tightening. It ensures that every bolt, nut, or screw is tightened to the exact specified torque (neither too tight nor too loose). In industrial settings, improper tightening can compromise the safety of an assembly or shorten the service life of components. That is why quality standards often require regular inspections of clamping tools, as well as periodic calibration accredited by COFRAC.
ACRN offers six models designed for a wide range of applications: from fixed preset clamping (RSPK, SPK) to micrometer readout (LCK, QLK), as well as direct-read dials (TOK) and traceable electronic systems (DTC-REV). Common synonyms include: torque wrench, torque key, or dynamometric wrench. For all of our equipment, the cost of the COFRAC accredited calibration certificate is always included in the quote. This certificate ensures full metrological traceability.