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Help Center0.5-20 Nm Self-Locking Torque Wrench, ±3% Accuracy, Chrome Vanadium Steel Head, 1/4" Drive
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Welcome to Cangzhou Dean Safety & Special Tools Co., Ltd – a trusted manufacturer since 2001 with an annual export value exceeding US$100 million. Our 0.5-20 Nm Self-Locking Torque Wrench combines precision engineering with durable chrome vanadium steel construction, delivering reliable performance for professionals in automotive, industrial, and maintenance applications. With a ±3% accuracy rating and a 1/4" drive, this tool ensures consistent torque control for critical fastening tasks.
Designed for efficiency and safety, this torque wrench features a self-locking mechanism that prevents accidental setting changes during use. The chrome vanadium steel head offers exceptional strength and wear resistance, while the ergonomic handle provides comfortable grip for extended work sessions. Whether you are tightening small screws or performing precise assembly, this wrench guarantees repeatable results.
Key Features
Torque Range: 0.5 – 20 Nm (adjustable with clear scale)
Accuracy: ±3% of indicated value (factory calibrated)
Self-Locking Mechanism: Locking collar prevents unintentional torque setting changes
Durable Head: Chrome vanadium steel (Cr-V) for high strength and corrosion resistance
Drive Size: Standard 1/4" square drive, compatible with most sockets and bits
Easy-to-Read Scale: Laser-etched markings on the handle for quick setting
Ergonomic Handle: Non-slip rubber grip reduces fatigue during repetitive use
Reversible Ratchet: 72-tooth ratchet mechanism for minimal arc swing
Technical Specifications
| Parameter | Value |
|---|---|
| Torque Range | 0.5 – 20 Nm (0.44 – 14.75 ft-lb) |
| Accuracy | ±3% (clockwise, at 20-100% of range) |
| Drive Size | 1/4" square drive |
| Head Material | Chrome Vanadium Steel (Cr-V) |
| Overall Length | Approx. 250 mm (9.8 inches) |
| Weight | Approx. 0.5 kg (1.1 lb) |
| Ratchet Teeth | 72-tooth (5° swing arc) |
| Calibration Standard | ISO 6789 (available upon request) |
Why Choose This Torque Wrench?
Self-Locking Design: Once set, the torque value stays locked – no accidental changes during use, improving safety and consistency.
High Precision: ±3% accuracy ensures you never over- or under-tighten critical fasteners, reducing rework and damage.
Premium Material: Chrome vanadium steel head withstands heavy use and resists rust, extending tool lifespan.
Versatility: Ideal for low-torque applications in electronics, automotive, bicycles, and small machinery.
Cost-Effective: Combines professional-grade features at a competitive price point for workshops and home users.
Our torque wrench is carefully calibrated at the factory and packaged in a durable storage case (included) to protect the tool when not in use. The clear scale markings allow quick setting to the desired Nm or in-lb values, and the ergonomic handle reduces hand strain during repetitive tasks.
Trusted by Professionals Worldwide
Cangzhou Dean Safety & Special Tools Co., Ltd has been a reliable manufacturer since 2001, exporting over US$100 million annually to markets across North America, South America, Europe, Asia, Africa, and Oceania. Our products are used by automotive technicians, industrial maintenance teams, and DIY enthusiasts who demand consistent quality. We maintain strict quality control throughout production, and every torque wrench is individually serial-numbered for traceability.
Ready to enhance your toolkit? Purchase our 0.5-20 Nm Self-Locking Torque Wrench today – a perfect balance of accuracy, durability, and value. For bulk orders or custom requirements, contact our sales team for competitive pricing and fast shipping from Tianjin, Shanghai, or Ningbo ports.
Frequently Asked Questions
Q: Is this torque wrench suitable for both tightening and loosening?
A: Yes, the reversible ratchet head allows you to use it for both clockwise (tightening) and counterclockwise (loosening) operations. However, the accuracy specification applies only to clockwise tightening.Q: What is the recommended calibration period?
A: We recommend recalibration every 12 months or after 5,000 cycles, whichever comes first. Calibration services are available upon request, and the tool can be adjusted to maintain ±3% accuracy.Q: Does the 1/4" drive accept standard sockets?
A: Yes, it accepts all standard 1/4" square drive sockets and accessories. Adapters are available separately if you need to use 3/8" or 1/2" sockets.Q: Can I use this torque wrench for torque values below 0.5 Nm?
A: The calibrated range is 0.5-20 Nm. Using it below 0.5 Nm is not recommended because accuracy may degrade. For lower torque applications, consider a smaller range tool.Q: How do I set the desired torque value?
A: Loosen the lock collar at the base of the handle, rotate the handle to align the indicator with the desired Nm value on the scale, then tighten the lock collar to secure the setting. The self-locking mechanism keeps it locked during use.Q: Is the wrench pre-lubricated or require maintenance?
A: The internal mechanism is pre-lubricated and does not require regular maintenance. Avoid exposure to water or solvents, and store in a dry place. If the ratchet becomes stiff, apply a drop of light oil to the mechanism.Q: What is the warranty period?
A: We offer a 12-month warranty against manufacturing defects. For warranty claims, please contact our support team with the serial number and proof of purchase.Q: Can I get a calibration certificate with the tool?
A: Yes, a factory calibration certificate is included. NIST-traceable certificates are available as an optional upgrade – please inquire when placing your order.
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