Brushless Wrench Drive Control Board Switch 18V/21V – 2106/161/169
Brushless Wrench Drive Control Board Switch 18V/21V – 2106/161/169
Brushless Electric Wrench Drive Control Board & Switch – 18V/21V (Fits Models 2106 / 161 / 169)
Keep your brushless power tools running at peak performance with this direct-replacement drive control board and speed-control switch. Designed specifically for the Dayi 2106, 161, and 169 brushless electric wrenches, this sensorless control board has been individually tested before shipping so you can install with confidence.
Key Features
- Broad Compatibility: Fits Dayi model 2106, 161, and 169 brushless electric wrenches; also compatible with 18V/21V brushless angle grinders and polishing machines.
- Sensorless Brushless Technology: Smooth, efficient motor control without Hall-effect sensors — fewer failure points and longer service life.
- Operating Voltage: 18V nominal (5S lithium pack, fully charged to 21V), rated power 300 W.
- Wide Battery Pack Compatibility: Works with battery packs labeled 48V, 68V, 88V, 98V, 128VF, or TV — these are marketing labels; actual cell voltage is 18V (5S2P / 5S3P configurations, fully charged 21V).
- Compact Form Factor: Control panel measures approximately 5.2 × 6.2 cm — a direct drop-in fit for supported models.
- Durable Plastic Housing: Lightweight yet sturdy construction stands up to the demands of everyday DIY and workshop use.
- Pre-Sale Tested: Every board is functionally verified before dispatch.
Installation Instructions
- Connect all wiring harnesses securely to the control board.
- Fix the motor into its housing.
- Install and close the tool casing.
- Tighten all screws until the shell halves meet flush — no gaps allowed.
- Verify the square drive shaft rotates freely without binding.
- Connect the battery pack.
- Press the speed-control switch to start. Note: A buzzing alarm may occur if the casing is not fully closed or if the shaft is jammed — always resolve mechanical issues before powering on.
⚠ Important: Follow the installation sequence carefully to protect the control board from damage. Do not apply power before the casing is fully assembled and the drive shaft moves freely.
Specifications
| Compatible Models | Dayi 2106 / 161 / 169 Brushless Electric Wrench |
| Drive Voltage | 18V (fully charged 21V) |
| Rated Power | 300 W |
| Control Panel Size | 5.2 × 6.2 cm |
| Material | Plastic |
| Motor Type Supported | Brushless Sensorless |
| Country of Origin | Made in Mainland China |
Package Contents
- 1 × Drive Control Board OR 1 × Speed-Control Switch (as selected)
For general power tool safety guidelines, refer to the U.S. Consumer Product Safety Commission – Power Tools Safety resource.
Frequently Asked Questions
Q: Which brushless wrench models is this drive control board compatible with?
A: This control board is designed specifically for the Dayi 2106, 161, and 169 brushless electric wrench models. It is also broadly compatible with 18V/21V brushless angle grinders and polishing machines that use a sensorless brushless motor configuration.
Q: My battery pack is labeled 48V or 68V — will this board still work?
A: Yes. Battery packs labeled 48V, 68V, 88V, 98V, 128VF, or TV are marketing designations. The actual cell voltage in these packs is 18V (5-series lithium configuration, fully charged to 21V), which is exactly what this control board is rated for.
Q: Why does the tool make a buzzing alarm when I first power it on?
A: A buzzing alarm typically indicates that the tool casing has not been fully closed (leaving a gap) or that the drive shaft is binding and cannot rotate freely. Ensure all screws are tightened so the shell halves meet flush, and verify the square drive shaft spins freely before connecting power.
Q: Is this control board tested before shipping?
A: Yes. Each board undergoes functional testing prior to dispatch to ensure it is in proper working order when it arrives.