1. Introduction
Thank you for choosing the GOYOJO Digital Torque Screwdriver. This high-precision tool is designed for accurate torque control in a wide range of applications, from electronics and bicycle maintenance to firearm assembly and furniture installation. With its digital display, multiple measurement units, and intelligent alert system, it ensures precise and safe fastening, preventing damage from over-tightening or under-tightening.
2. Package Contents
Please check the package for the following items:
- 1 x GOYOJO Digital Torque Screwdriver
- 1 x Bit Holder
- 10 x High-quality Alloy Steel Bits:
- Cross (Phillips): PH1, PH2, PH3
- Hexagonal (Hex): H4, H5, H6
- Slotted (Flathead): SL3, SL4, SL5, SL6
- 1 x User Manual (this document)
3. Product Overview
- Operating Mode: Indicates current mode (Track, Peak, Preset).
- Battery Display: Shows current battery level.
- Units: Displays selected torque unit (N.m, kgf.cm, lbf.ft, lbf.in).
- Display Value: Shows the real-time or peak torque value.
- Torque Direction: Indicates tightening or loosening.
- Increment Default (Up Arrow): Used to increase values or navigate menus.
- Power on/Off/Reset (P/C Button): Powers the device on/off, or resets settings.
- Working Mode/Setting (M Button): Changes operating modes or enters setting menu.
4. Setup and Initial Use
4.1 Battery Installation
The screwdriver is battery-powered. Ensure batteries are correctly installed before first use. Refer to the battery compartment for polarity. While the product description states 'Battery Included: No', it is designed to operate with batteries.
4.2 Bit Installation
The GOYOJO Digital Torque Screwdriver features a magnetic 1/4" hex bit holder for quick and easy bit changes.
- Select the appropriate bit for your task from the included 10-piece set.
- Insert the bit firmly into the magnetic 1/4" hex holder at the tip of the screwdriver. The magnetic holder will secure the bit in place.
- To remove, simply pull the bit out.
5. Operating Instructions
5.1 Power On/Off
- To Power On: Press and hold the P/C button until the display illuminates.
- To Power Off: Press and hold the P/C button until the display turns off. The device will also automatically power off after a period of inactivity to conserve battery.
5.2 Unit Selection
The screwdriver supports four torque units: N.m, lbf.ft, lbf.in, and kgf.cm.
- With the device powered on, press the M button repeatedly to cycle through the available units until your desired unit is displayed.
5.3 Setting Torque Values (Preset Mode)
The screwdriver allows you to set custom preset torque values for repetitive tasks.
- Press the M button to enter the Preset mode (indicated on the display).
- Use the Up Arrow and Down Arrow buttons to adjust the target torque value.
- Press the M button again to confirm the setting.
- The device can store up to 3 groups of preset values.
5.4 Operating Modes (Track and Peak)
The screwdriver offers two main operating modes:
- Track Mode: Displays real-time torque as it is applied.
- Peak Mode: Captures and displays the maximum torque applied during an operation. In this mode, the device records each torque value and stores up to 999 data sets for later review.
To switch between modes, press the M button until the desired mode (Track or Peak) is shown on the display.
5.5 Overload Protection and Alerts
The GOYOJO Digital Torque Screwdriver features an intelligent alert system to prevent damage from excessive torque.
- When the applied torque reaches 80% of the preset maximum torque value, the device will trigger a warning (buzzer sound and/or visual alert on the LED display).
- Note: Ensure the buzzer function is turned on in the settings for audible alerts.
5.6 LED Backlight
The convenient backlight mode makes it easy to read the display in low-light environments. The backlight automatically activates when the device is in use or a button is pressed.
6. Maintenance
6.1 Cleaning
- Wipe the screwdriver body with a soft, dry cloth.
- Do not use abrasive cleaners or solvents, as they may damage the display or casing.
- Keep the bit holder free from debris to ensure proper bit seating.
6.2 Storage
- Store the screwdriver and bits in a dry, clean environment, away from extreme temperatures and direct sunlight.
- Remove batteries if the device will not be used for an extended period to prevent leakage.
6.3 Bit Care
- The included bits are made of high-quality alloy steel for wear resistance and toughness.
- Inspect bits regularly for wear or damage. Replace worn bits to maintain precision and prevent damage to fasteners.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Screwdriver does not power on. | Low or dead batteries; Incorrect battery installation. | Replace batteries; Check battery polarity. |
| Buzzer alert not sounding. | Buzzer function is turned off in settings. | Ensure the buzzer function is enabled in the device settings. |
| Inaccurate torque readings. | Worn or incorrect bit; Device needs recalibration (rare). | Use a new, correct bit; Contact customer support if issue persists. |
| Bits fall out of holder. | Debris in bit holder; Damaged magnetic holder. | Clean the bit holder; Contact customer support if magnetic function is lost. |
8. Specifications
| Feature | Detail |
|---|---|
| Torque Range | 0.8-8 Nm (7.08-70.8 in-lbs) |
| Accuracy | ±2% |
| Measurement Units | N.m, lbf.ft, lbf.in, kgf.cm |
| Bit Holder Size | 1/4" Hex |
| Included Bits | PH1, PH2, PH3, H4, H5, H6, SL3, SL4, SL5, SL6 (10 Pcs) |
| Data Storage | Up to 999 sets (in Peak mode) |
| Preset Values | 3 groups of customizable preset values |
| Alerts | Buzzer and visual warning at 80% of preset torque |
| Display | LED with Backlight Mode |
| Handle | Ergonomic, sweat-absorbent, non-slip |
| Package Dimensions | 21 cm (Length) x 7 cm (Width) x 7 cm (Height) |
| Package Weight | 0.39 kg |
9. User Tips
To maximize the utility and lifespan of your GOYOJO Digital Torque Screwdriver, consider the following tips:
- Application-Specific Torque Values: Utilize the preset value function for common tasks to ensure consistent and accurate fastening.
Recommended Torque Values for Specific Applications:
- Bicycle Maintenance:
- Seatpost clamp: 5-10 in-lbs
- Handlebar clamp: 5-10 in-lbs
- Stem bolts: 5-8 in-lbs
- Brake caliper bolts: 6-8 in-lbs
- Pedals: 30-35 in-lbs
- Firearm Maintenance/Assembly:
- Scope Ring: 15-25 inch-pounds
- Scope Base Screw: 30-40 inch-pounds
- Action Screw/Receiver Bolt: 35-65 inch-pounds
- Furniture Installation: 15-30 in-lbs
- Electronic Devices Maintenance: 1-5 in-lbs
- Data Logging: Use the PEAK mode to record and review torque values, which can be useful for quality control or documenting work.
- Ergonomic Grip: The non-slip handle is designed for comfort and reduced hand fatigue during prolonged use. Maintain a firm, steady grip for best results.
- Preventing Drops: The magnetic bit holder not only facilitates quick changes but also helps prevent screws from falling during operation.
10. Warranty and Support
GOYOJO products are manufactured to high-quality standards. For any questions, technical support, or warranty claims, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
