HAZET · TORQUE WRENCH
HAZET 5145-3CT Torque Wrench
300–800 N·m Torque Range, ±3% Accuracy, 3/4″ Square Drive
Key Features
- Torque range: 300–800 N·m
- Torque accuracy: ±3% of the set torque value during clockwise tightening
- Square drive: 3/4"
- Scale graduation: 2.5 N·m
- Reversible ratchet with 32 teeth
- 11.25° ratchet opening angle
- Audible and tactile signal when the set torque is reached
- Ergonomic torque adjustment handle and locking mechanism
- Easy-to-read, laser-marked scale
- Robust construction for demanding workshop conditions
- Serial number and factory calibration certificate
- Sturdy Hexa plastic box
- Complies with DIN EN ISO 6789-2:2017-07, DIN 3120 and ISO 1174-1
- Length: 1271 mm · Weight: 6,7 kg
- Actuating force (min.–max.): 26.2–71.0 kg
- Manufacturer / Country of origin: HAZET / Germany
- Technical support, spare parts and calibration services provided by Surkon
Controlled Tightening for High-Torque Applications
The HAZET 5145-3CT is an adjustable torque wrench for controlled tightening within a range of 300–800 N·m. It is suitable for commercial vehicle and industrial maintenance tasks where the specified tightening torque falls within this range. Select the torque setting according to the connection manufacturer’s instructions.
The 3/4″ square drive and 300–800 N·m torque range are suitable for compatible high-torque commercial vehicle and industrial maintenance tasks. Check the required torque and socket compatibility against the equipment manufacturer’s instructions.
The 3/4″ square drive accepts sockets with the same drive size. The reversible ratchet has 32 teeth and a ratchet opening angle of 11.25°.
Torque accuracy during clockwise tightening is ±3% of the set torque value. The scale graduation is 2.5 N·m. These are separate specifications: the scale graduation indicates the increments shown on the scale.
The actuating force indicates the minimum and maximum force required at the handle to reach the torque values within the specified range. HAZET specifies 26.2–71.0 kg for the 5145-3CT. This is not the weight of the tool; its net weight is 6.7 kg.
The torque is adjusted by turning the handle. The locking mechanism secures the selected setting. The laser-marked scale makes the torque value easy to read.
An audible and tactile signal indicates when the set torque is reached. Stop tightening when this signal occurs. A reversible ratchet does not mean that the specified torque accuracy applies to anticlockwise tightening.
Manufactured in Germany, the wrench is supplied with a serial number and a HAZET factory calibration certificate in a sturdy Hexa plastic box. Technical support, spare parts and calibration services in Türkiye are provided by Surkon.
Model Comparison
| Model | Torque Range (N·m) |
Square Drive | Torque Accuracy | Ratchet Tooth Count | Ratchet Opening Angle | Actuating Force * (kg) |
a (mm) |
b (mm) |
Length (mm) |
|---|---|---|---|---|---|---|---|---|---|
| 5107-3CT | 1–9 | 1/4″ | ±4% | 20 | 18° | 0.6–5.5 | 10.2 | 24 | 234 |
| 5108-3CT | 2.5–25 | 1/4″ | ±3% | 20 | 18° | 1.4–15.3 | 10.2 | 24 | 234 |
| 5110-3CT | 10–60 | 3/8″ | ±3% | 30 | 12° | 3.9–25.0 | 14.5 | 32 | 320 |
| 5111-3CT | 20–120 | 3/8″ | ±3% | 30 | 12° | 6.9–43.5 | 14.5 | 32 | 375 |
| 5120-3CT | 10–60 | 1/2″ | ±3% | 30 | 12° | 3.9–25.0 | 14.5 | 32 | 320 |
| 5121-3CT | 20–120 | 1/2″ | ±3% | 32 | 11.25° | 6.1–38.0 | 19.6 | 44 | 421 |
| 5122-3CT | 40–200 | 1/2″ | ±3% | 32 | 11.25° | 9.4–49.5 | 19.6 | 44 | 519 |
| 5123-3CT | 60–320 | 1/2″ | ±3% | 32 | 11.25° | 11.3–62.2 | 19.6 | 44 | 628 |
| 5143-3CT | 100–400 | 1/2″ | ±3% | 32 | 11.25° | 14.8–60.3 | 28.5 | 64 | 790 |
| 5145-3CT | 300–800 | 3/4″ | ±3% | 32 | 11.25° | 26.2–71.0 | 28.5 | 64 | 1271 |
* Indicates the minimum and maximum force required at the handle to reach the torque values within the specified range. a: head thickness; b: head width. The yellow row highlights the model shown on this page.
On smaller screens, you can scroll the table horizontally.
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Documents
HAZET 5145-3CT – Frequently Asked Questions
What is the HAZET 5145-3CT used for?
It is used to tighten connections to a specified torque within a range of 300–800 N·m. Its 3/4″ square drive accepts matching sockets for suitable automotive, commercial vehicle and industrial maintenance tasks. Always follow the connection manufacturer’s specified tightening torque.
What is the difference between the 5145-3CT and the 5143-3CT?
The 5145-3CT covers 300–800 N·m, has a 3/4″ square drive and is 1271 mm long. The 5143-3CT covers 100–400 N·m, has a 1/2″ square drive and is 790 mm long. Both have ±3% accuracy during clockwise tightening. 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?
The specified torque accuracy applies to clockwise tightening only. HAZET recommends torque wrenches with interchangeable insert heads for controlled anticlockwise tightening.
Which sockets are compatible?
It accepts sockets with a 3/4″ square drive. Select the socket size and profile to match the screw or nut head.
Do I need to reset the wrench to the minimum scale value after use?
No. HAZET states that the 5145-3CT does not need to be returned to the minimum scale value after use. Follow the manufacturer’s instructions for handling and storage.
Are calibration services and technical support available?
Yes. Surkon is an authorised HAZET dealer and technical support provider in Türkiye. Repair, maintenance and calibration services for HAZET equipment are provided by Surkon. An in-house calibration certificate is issued for HAZET torque wrenches following repair and maintenance. TÜRKAK-accredited calibration services are available on request at the Surkon calibration laboratory.
Scope of Delivery
- HAZET 5145-3CT torque wrench
- HAZET factory calibration certificate
- Sturdy Hexa plastic box
Operating Instructions
- Identify the required torque from the connection manufacturer’s instructions.
- Unlock the torque adjustment mechanism, set the required torque using the scale, then lock the setting.
- Fit a suitable socket with a 3/4″ square drive and select clockwise tightening.
- Apply steady force at the handle. Stop tightening when the audible and tactile signal occurs.
For detailed operating instructions, refer to the HAZET operating instructions above.
Product Video – HAZET 5000-3CT Torque Wrench Series
Specifications
| Brand | Hazet |
| Operation Type | Manual |
| Accuracy | ±3% (clockwise tightening) |
| Scale | 2.5 N·m |
| Drive Size | 3/4″ |
| Torque Setting Type | Adjustable |
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