Introduction and Overview
The EPAuto 1/2-Inch Digital Torque Adapter is a precision tool designed to convert any standard ratchet or breaker bar into a digital torque wrench. It provides accurate torque measurements and features a clear digital display for easy reading. This adapter is ideal for applications requiring precise torque specifications, such as automotive maintenance, machinery assembly, and other mechanical tasks.

Image: The EPAuto 1/2-Inch Digital Torque Adapter, its protective carrying case, and included 1/4-inch and 3/8-inch drive adapters.
Package Contents
Please verify that all items listed below are included in your package:
- 1 x EPAuto 1/2-Inch Digital Torque Adapter
- 1 x Adapter for 1/4-inch sockets
- 1 x Adapter for 3/8-inch sockets
- 1 x User Manual (this document)
- 1 x Storage Case
- Note: 2 x AAA batteries are required but not included.

Image: The digital torque adapter neatly stored within its durable carrying case, alongside the smaller drive adapters.
Specifications
| Feature | Specification |
|---|---|
| Torque Range | 29.5 to 147.6 lb-ft |
| Accuracy | ±2% |
| Units | Kg-m, Kg-cm, lb-in, N-m, lb-ft |
| Drive Size | 1/2 Inch Adapter (with 1/4" and 3/8" adapters included) |
| Power Source | 2 x AAA Batteries (not included) |
| Operation Mode | Battery |
| Item Weight | 1.08 pounds (approx. 490 grams) |
| Product Dimensions | 4.29 x 5.28 x 2.56 inches |
| Material | Metal |
| Color | Black |
Setup
- Battery Installation:
Locate the battery compartment on the back of the digital torque adapter. Open the compartment and insert 2 AAA batteries, ensuring correct polarity (+/-). Close the battery compartment securely.

Image: The rear view of the digital torque adapter, highlighting the battery compartment for AAA battery insertion.
- Attaching to a Wrench:
Insert the 1/2-inch square drive of the digital torque adapter into the drive of your standard ratchet or breaker bar. Ensure it is fully seated and secure. If using 1/4-inch or 3/8-inch sockets, first attach the corresponding adapter to the digital torque adapter, then attach your socket to the adapter.

Image: The digital torque adapter with a standard socket attached, ready for use with a wrench.
Operating Instructions
Power On/Off
- Press the Power button (labeled with a power symbol) to turn the unit on.
- The unit will automatically power off after 80 seconds of inactivity to conserve battery life.
Changing Units
- With the unit powered on, press the "M" button (Mode button) to cycle through the available torque units: N-m, lb-ft, lb-in, Kg-m, Kg-cm.
- The selected unit will be displayed on the screen.

Image: The adapter's display showing torque in Lb-ft units.
Setting Operating Mode (Peak/Trace)
- Press the "P/T" button to switch between Peak (P) and Trace (T) modes.
- In Peak Mode (P), the display will hold the maximum torque value achieved during the application.
- In Trace Mode (T), the display will show the real-time torque value as it is being applied.

Image: The digital torque adapter actively measuring torque on a car wheel lug nut, demonstrating its real-time application.
Setting Target Torque Value
- Press the "M" button for 3 seconds to enter the preset torque setting mode. The target torque value will flash.
- Use the Up (▲) and Down (▼) buttons to adjust the target torque value.
- Press the "M" button again to confirm the setting and exit the mode.
- When the applied torque reaches the preset value, the adapter will emit a "Beep" sound, indicating the target torque has been achieved.
Maintenance
- Cleaning: Wipe the adapter with a clean, dry cloth after each use. Do not use abrasive cleaners or solvents.
- Storage: Store the digital torque adapter in its protective carrying case in a dry, cool place away from direct sunlight and extreme temperatures.
- Battery Replacement: If the display becomes dim or the unit does not power on, replace the AAA batteries. Always dispose of used batteries responsibly.

Image: The closed protective carrying case, emphasizing proper storage for the digital torque adapter.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on. | Dead or incorrectly installed batteries. | Replace batteries with new AAA batteries, ensuring correct polarity. |
| Display is dim or flickering. | Low battery power. | Replace batteries. |
| Inaccurate readings. | Unit not properly calibrated or damaged. | Ensure proper usage as per instructions. If issues persist, contact customer support. |
| "L-ACE" error on display. | This indicates the unit is in Trace mode and ready to measure. | This is not an error. Proceed with torque application. |
Warranty and Support
EPAuto products are manufactured to high standards and rigorously tested. For warranty information, technical support, or service inquiries, please contact EPAuto customer service through their official website or the retailer where the product was purchased. Please have your model number (ST-11A-1) and purchase details ready when contacting support.
You can find more information and contact details on the EPAuto Store on Amazon.