1. Introduction
Thank you for choosing the SK 1/2" Drive Digital Torque Wrench. This manual provides essential information for the safe and effective operation, maintenance, and care of your new tool. Please read it thoroughly before use and retain it for future reference.
This digital torque wrench offers precise torque measurement with a clear LED display, multiple units of measure, and visual flash notifications for target torque achievement. Its ergonomic design and robust construction ensure reliable performance for various applications.
Image 1.1: The SK 1/2" Drive Digital Torque Wrench and its protective green storage case.
2. Safety Information
Always observe basic safety precautions when using power tools to reduce the risk of injury. Failure to follow these instructions may result in damage to the tool or personal injury.
- Wear appropriate personal protective equipment, such as safety glasses.
- Ensure the workpiece is stable and secure before applying torque.
- Do not exceed the maximum torque capacity of the wrench.
- Keep the tool clean and dry. Avoid exposure to moisture or extreme temperatures.
- Do not use the wrench if it is damaged or malfunctioning.
- Keep children and unauthorized persons away from the work area.
3. Product Overview
The SK Digital Torque Wrench is designed for accurate and consistent torque application. Key features include:
- Digital Display: Clear readout of torque values.
- Multiple Units: Supports N-m, ft-lb, in-lb, and kg-cm.
- LED Indicators: Green for 90% target torque, Red for 100% target torque.
- Audible Buzzer: Provides an alert when target torque is reached.
- Anti-Slip Handle: Ensures a comfortable and secure grip.
- 36-Tooth Ratchet: Provides a 10° ratcheting arc for efficient operation.
- Directional Switch: Allows for tightening or loosening fasteners.
- Auto-Sleep Function: Conserves battery life after 5 minutes of inactivity.
Image 3.1: Key features and components of the SK Digital Torque Wrench.
Image 3.2: The ergonomic anti-slip handle for comfortable and secure use.
4. Setup
4.1 Battery Installation
The torque wrench requires two AA batteries for operation. Follow these steps for proper installation:
- Step 1: Remove the battery cap by rotating it counter-clockwise.
- Step 2: Insert two R6/AA batteries, ensuring the positive (+) and negative (-) polarities match the markings inside the battery compartment.
- Step 3: Replace the battery cap and rotate it clockwise until it is tightly secured.
Caution: Reversing the battery polarity may result in leakage or damage to the device.
Image 4.1: Battery installation procedure.
5. Operating Instructions
5.1 Power On/Off
- To power on, press the power button (usually marked 'C' or a power symbol).
- The wrench will automatically power off after 5 minutes of inactivity to conserve battery life.
5.2 Unit Selection
Press the 'U/S' button to cycle through the available measurement units: Newton-meters (N-m), foot-pounds (ft-lb), inch-pounds (in-lb), and kilogram-centimeters (kg-cm).
Image 5.1: The digital display showing various measurement units.
5.3 Setting Target Torque
Use the up (▲) and down (▼) arrow buttons to adjust the desired target torque value. The digital display will show the set value.
5.4 Operating Modes: Track Mode and Peak Hold Mode
The wrench features two operating modes for different applications:
- Track Mode: Displays the current torque value being applied in real-time.
- Peak Hold Mode: Captures and displays the maximum torque value achieved during an application.
Refer to the product display for mode selection, typically indicated by 'T' for Track and 'P' for Peak Hold.
Image 5.2: Visual representation of Track Mode, Peak Hold Mode, and LED indicators.
5.5 Torque Application and Notification
As you apply torque, the digital display will show the current value. The wrench provides visual and audible feedback:
- When 90% of the target torque is reached, green indicator lights will illuminate, and the buzzer may emit a warning sound.
- When 100% of the target torque is achieved, red indicator lights will illuminate, and the buzzer will sound continuously. Stop applying force immediately.
Image 5.3: LED indicators and buzzer for torque notification.
5.6 Directional Switch
The directional switch, located on the ratchet head, allows you to change the direction of rotation for tightening or loosening fasteners. Ensure the switch is set to the desired direction before applying torque.
Image 5.4: The directional switch on the ratchet head.
Image 5.5: Example of the torque wrench in use on an engine.
6. Maintenance
6.1 Cleaning
Wipe the wrench clean with a soft, dry cloth after each use. Do not use abrasive cleaners or solvents, as these can damage the digital display or finish.
6.2 Storage
Store the torque wrench in its protective case in a dry, clean environment away from direct sunlight and extreme temperatures. Remove batteries if the tool will not be used for an extended period.
Image 6.1: Proper storage of the torque wrench in its case.
6.3 Calibration
Digital torque wrenches require periodic calibration to maintain accuracy. Refer to the manufacturer's guidelines or a certified calibration service for recommended calibration intervals and procedures. This model features internal calibration capabilities.
7. Troubleshooting
If you encounter issues with your SK Digital Torque Wrench, consider the following common solutions:
- No Power: Check battery installation and ensure batteries are fresh. Replace if necessary.
- Inaccurate Readings: Ensure the wrench is properly calibrated. Avoid dropping or subjecting the tool to impact.
- Display Issues: If the display is dim or flickering, replace the batteries.
- Buzzer Not Sounding: Check if the buzzer function is enabled in the settings (if applicable).
For persistent issues not resolved by these steps, contact SK customer support.
8. Specifications
The following table details the technical specifications of the SK 1/2" Drive Digital Torque Wrench:
| Feature | Specification |
|---|---|
| Drive Size | 1/2" |
| Torque Measuring Range | 17 N-m to 340 N-m |
| Max. Torque | 340 N-m / 250.7 ft-lb / 3009 in-lb / 3469 kg-cm |
| Torque Accuracy | +/-2% CW (Clockwise), +/-3% CCW (Counter-Clockwise) |
| Units of Measure | N-m, ft-lb, in-lb, kg-cm |
| Ratchet Teeth | 36-Tooth |
| Auto-Sleep | 5 minutes |
| Batteries | 2 x AA (Included) |
| Material | Alloy Steel |
| Item Length | 12 Inches |
| Item Weight | 5.15 Pounds |
| Manufacturer | Hangzhou Great Star Industrial Co.,LTD. |
Image 8.1: Summary of torque measuring range and accuracy.
9. Warranty and Support
9.1 Warranty Information
For detailed warranty information regarding your SK Digital Torque Wrench, please refer to the documentation included with your purchase or visit the official SK Tools website. Warranty terms typically cover manufacturing defects under normal use.
9.2 Customer Support
If you require assistance, have questions about your product, or need to report an issue, please contact SK customer service. Contact information can be found on the official SK Tools website or through your retailer.