HAZET · INSULATED TORQUE WRENCH
HAZET 5121KV Insulated Torque Wrench
20–120 N·m Torque Range, ±4% Accuracy, 1/2″ Square Drive, 1000 V Protective Insulation
Key Features
- Torque range: 20–120 N·m
- Torque accuracy: ±4% of the set torque value during clockwise and anticlockwise tightening
- Square drive: 1/2″
- Scale graduation: 1 N·m
- Actuating force (min.–max.): 6.0–37.4 kg
- 1000 V protective insulation in accordance with IEC 60900:2018
- 32-tooth ratchet with an 11.25° ratchet opening angle
- Clockwise and anticlockwise tightening by repositioning the square drive
- Audible and tactile signal when the set torque is reached
- Ergonomic torque adjustment handle and locking mechanism
- Slim design that meets the required insulation specifications
- DIN EN ISO 6789-2:2017-07 · DIN 3120 · ISO 1174-1
- Length: 420 mm
- Manufacturer / Country of origin: HAZET / Germany
- Technical support and calibration service coordination provided by Surkon
Controlled Tightening with Protective Insulation
The HAZET 5121KV is an adjustable insulated torque wrench for controlled tightening within a range of 20–120 N·m. Select the torque value according to the connection manufacturer’s instructions.
The 1/2″ square drive is used with suitable insulated sockets of the matching drive size. The ratchet has 32 teeth and a ratchet opening angle of 11.25°.
For suitable service tasks on electric and hybrid vehicles, the HAZET 5121KV combines controlled tightening with 1000 V protective insulation in accordance with IEC 60900:2018. The insulation provides an additional layer of electrical protection when the tool is used correctly with compatible insulated accessories. Select the tool according to the vehicle manufacturer’s specified torque and service procedure. Work on high-voltage systems must be carried out by appropriately trained personnel using the required isolation procedures and protective equipment.
The scale graduation is 1 N·m. This indicates the increments shown on the scale and is separate from the ±4% torque accuracy. The tool has 1000 V protective insulation in accordance with IEC 60900:2018.
The actuating force indicates the minimum and maximum force required at the handle to reach the torque values within the specified range. HAZET specifies 6.0–37.4 kg for the 5121KV. This is not the weight of the tool.
The torque is adjusted by turning the handle. The locking mechanism secures the selected setting.
The square drive can be repositioned for clockwise or anticlockwise tightening. The specified ±4% accuracy applies in both tightening directions. An audible and tactile signal indicates when the set torque is reached. Stop tightening when this signal occurs.
Manufactured in Germany, the tool is supported in Türkiye by Surkon for technical enquiries and calibration service coordination. KV tools must be used by trained specialist personnel. Check that the insulation is undamaged before use.
Model Comparison
| Model | Torque Range (N·m) | Square Drive | Torque Accuracy | Ratchet Tooth Count | Ratchet Opening Angle | Actuating Force* (kg) | Scale Graduation (N·m) | Protective Insulation | Length (mm) |
|---|---|---|---|---|---|---|---|---|---|
| 5108KV | 2–10 | 3/8″ | ±6% | 24 | 15° | 1.0–5.0 | 0.2 | 1000 V | 275 |
| 5109KV | 5–25 | 3/8″ | ±4% | 24 | 15° | 2.1–11.0 | 0.5 | 1000 V | 305 |
| 5121KV | 20–120 | 1/2″ | ±4% | 32 | 11.25° | 6.0–37.4 | 1 | 1000 V | 420 |
* Indicates the minimum and maximum force required at the handle to reach the torque values within the specified range.
On smaller screens, you can scroll the table horizontally.
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Documents
HAZET 5121KV – Frequently Asked Questions
Is the HAZET 5121KV suitable for electric and hybrid vehicle maintenance?
Yes, for service tasks requiring 20–120 N·m and a 1/2″ square drive, where the vehicle manufacturer specifies suitable insulated tooling. Its 1000 V protective insulation provides an additional layer of electrical protection. It does not make every high-voltage task safe on its own. Follow the vehicle manufacturer’s procedures for isolation, verification of absence of voltage and personal protective equipment. Only appropriately trained personnel should carry out this work.
What are the differences between the KV models?
The 5108KV covers 2–10 N·m with ±6% accuracy and a 3/8″ square drive. The 5109KV covers 5–25 N·m with ±4% accuracy and a 3/8″ square drive. The 5121KV covers 20–120 N·m with ±4% accuracy and a 1/2″ square drive. Select the model according to the required torque range and socket drive size.
What happens when the set torque is reached?
An audible and tactile signal occurs. Stop tightening when you receive this signal; do not continue applying force.
Does it also provide torque control during anticlockwise tightening?
Yes. Reposition the square drive for the required tightening direction. The specified ±4% torque accuracy applies to both clockwise and anticlockwise tightening.
Which sockets are compatible?
Use suitable insulated sockets with a 1/2″ square drive. For work on live equipment, follow the manufacturer’s instructions and use the specified HAZET tools marked 1000 V and compliant with IEC 60900.
How often should the torque wrench be checked?
HAZET specifies checking annually or after 5,000 releases. Any necessary adjustment must follow the KV service requirements. Contact Surkon to arrange inspection and the appropriate service process.
Are calibration services and technical support available?
Yes. Surkon provides technical support and coordinates calibration and service enquiries in Türkiye. For HAZET KV torque wrenches, adjustment and repairs involving dismantling and reassembly must be carried out by the HAZET Service Centre. After repair, a 10,000 V routine test in accordance with IEC 60900 is required. Contact Surkon to arrange the appropriate service process and confirm calibration options.
Scope of Delivery
- HAZET 5121KV insulated torque wrench
- HAZET factory calibration certificate
Operating Instructions
- Check that the insulation is undamaged before use. The tool must be used by trained specialist personnel.
- Confirm that the required tightening torque is within the 20–120 N·m range.
- Kilitleme kovanını kabzaya doğru çekin ve saat yönünün tersine çevirerek kilidi açın. Kabzayı çevirerek istenen tork değerini ayarlayın. Ardından kovanı saat yönünde çevirin ve yerine tam olarak kilitlendiğini kontrol edin.
- Fit a suitable insulated socket with a 1/2″ square drive using the locking button and check that it is secure. Reposition the square drive for the required tightening direction.
- Apply steady force at the handle. Stop tightening when the audible and tactile signal occurs. Do not use the tool to loosen connections.
For detailed operating instructions, refer to the HAZET operating instructions above.
Product Video – HAZET KV Series
Specifications
| Brand | Hazet |
| Operation Type | Manual |
| Accuracy | ±4% (clockwise) |
| Scale | 1 N·m |
| Drive Size | 1/2″ |
| Torque Setting Type | Adjustable |
| Instrument Type | Yalıtımlı (VDE) |
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