1. Product Overview
The SHAHE YSQ-70 preset torque screwdriver is designed for precise screw fastening and tightening of workpieces that require specific torque values. It operates in a clockwise direction with preset torque values. The screwdriver features an idling mechanism that activates once the set torque value is reached, ensuring precise thread fastening.
This tool is ideal for applications demanding high accuracy in screw locking, such as precision instrument assembly and circuit board fixing. Its versatility makes it suitable for use across various industries, including electrical, light industry, mechanical manufacturing, and scientific research.
Key Features:
- Preset Torque Value: Allows for setting a specific torque value with an audible alarm and tactile vibration feedback.
- Audible & Tactile Feedback: Upon reaching the preset torque, the screwdriver emits a distinct "Click" sound accompanied by noticeable hand vibration, signaling the completion of the tightening operation.
- Automatic Reset: All related parts automatically reset after the tightening action is completed.
- Dual Direction Functionality: Designed for clockwise tightening and reverse direction for disassembly, offering simple and convenient use.
- Clear Scale Reading: Features a linear scale with zero-point indication, ensuring clear and accurate torque readings.
- Durable Construction: The screwdriver's coat is made of strong and wear-resistant nylon.
- Standard Compliance: The torque screwdriver adheres to the relevant regulations of GB/T 15729-2008.
Figure 1: SHAHE YSQ-70 Adjustable Torque Screwdriver
2. Package Contents
Upon unboxing, please verify that all items listed below are present and in good condition:
| No. | Item Name | Quantity |
|---|---|---|
| 1 | Torque Driver (Fuselage) | 1 |
| 2 | Short Batch Head (Bits) | 10 |
| 3 | Instruction Manual | 1 |
| 4 | Package Box | 1 |
| 5 | Product Certificate | 1 |
| 6 | Desiccant | 1 |
Figure 2: Torque Screwdriver with included bits and packaging
Video 1: Product unboxing, bit installation, torque adjustment, and usage demonstration.
3. Setup and Operation
3.1. Component Identification and Dimensions
Figure 3: Labeled components and dimensions of the torque screwdriver. Key parts include the Magnetic Bit Holder, Driver Handle, Torque Meter (10 to 70 In. to Lbs.), and Auto-Locking Torque Adjustment Knob.
3.2. Setting the Torque Value
- Hold the main body of the screwdriver with one hand.
- With the other hand, pull out the loading handwheel (torque adjustment knob).
- Rotate the handwheel to adjust the torque to the desired value, observing the main and minor scales on the torque meter.
- Once the desired torque is set, release the loading handwheel. It will automatically return to its starting position, locking the preset torque.
Figure 4: Clear torque range windows for easy reading and reduced errors, showing main and minor scales.
Figure 5: Torque adjustment process: 1. Pull up to unlock, 2. Rotate to set, 3. Push down to lock.
3.3. Installing Bits
- Select the appropriate bit from the included set based on the fastener head type.
- Insert the selected bit into the 1/4-inch drive head of the screwdriver. The magnetic bit holder will secure it in place.
3.4. Tightening Fasteners
- With the bit installed and torque set, hold the screwdriver handle firmly.
- Position the bit onto the fastener.
- Turn the screwdriver clockwise. Continue turning until you hear a distinct "Click" sound and feel a clear vibration in your hand. This indicates that the preset torque value has been reached and the screwdriver has idled.
- Stop applying force immediately after the "Click" and vibration.
Figure 6: Demonstrating accurate and repeatable torque settings for various screws, such as base screws, windage screws, guard screws, and scope rings.
4. Maintenance Instructions
- After each use, always reset the torque value to the minimum position. This helps maintain the screwdriver's accuracy and extends its service life.
- Keep the screwdriver clean and free from dust and debris.
- Avoid exposing the product to strong impacts.
- Do not use the torque screwdriver as a substitute for other tools.
- Prevent contact with acids, alkalis, or corrosive gases, as these can damage the tool.
- The measuring value of this product has been factory-calibrated. Do not attempt to disassemble the screwdriver without proper authorization, as this may lead to errors in measurement accuracy and void the warranty.
- If the screwdriver will not be used for an extended period, ensure the scale line is adjusted to the minimum torque value before storage.
5. Troubleshooting & Important Notes
- No "Click" Sound/Vibration: Ensure the torque value is correctly set and the adjustment knob is locked. If the issue persists, the fastener might already be at or above the set torque, or the tool may require servicing.
- Inaccurate Readings: Always reset the torque to zero after use. Avoid unauthorized disassembly, as this can affect calibration.
- Tool Damage: Do not use the screwdriver for tasks beyond its intended purpose or apply excessive force after the torque alarm.
- Environmental Exposure: Protect the tool from harsh chemicals and extreme conditions to prevent material degradation.
6. Specifications
| Attribute | Value |
|---|---|
| Model | YSQ-70 |
| Type | Precision Screwdriver |
| Range | 10~70 in-lb |
| Torque Increment | 1 in-lb |
| Precision | ±6% |
| Length | 161.5 mm |
| Outside Diameter | Φ42 mm |
| Drive Head | 1/4 inch (6.35 mm) Hexagonal |
| Screw Head Type | HEX |
| Material | Chrome-vanadium Steel |
| Magnetic | No |
| With Handle | Yes |
| Features | Multifunctional |
| Origin | Mainland China |
| Net Weight (approx.) | 0.29 Kg |
7. Warranty and Support
For any product failures or issues, please contact the original purchasing office or our company directly for support.
- One-Month Replacement: Within one month from the date of sale, if the product experiences quality problems under normal use and has an undamaged appearance, you may be eligible for a replacement. This requires the original customer invoice, a valid warranty card, and complete original packaging. The warranty period for the replacement product will extend from the original purchase date.
- One-Year Warranty: Within one year from the date of sale, non-man-made faults occurring under normal use are covered by warranty. Please note that the warranty is void if the user disassembles the machine or attempts repairs at unauthorized service points.
- Scope of Warranty: This warranty specifically applies to products sold within the Chinese market. For products purchased outside this region or beyond the warranty period, customers can consult the original purchasing office or the company for paid maintenance services.
8. User Tips
- This screwdriver is a multifunctional precision tool. Utilize its adjustable torque feature for tasks requiring specific fastening strengths to prevent overtightening or undertightening.
- The integrated handle provides a comfortable grip, enhancing control and precision during use.
- Always ensure the correct bit is used for the fastener to avoid stripping the screw head or damaging the bit.
