18V 21V Brushless Control Board & Switch for Dayi 2106 Wrench
18V 21V Brushless Control Board & Switch for Dayi 2106 Wrench
18V/21V Brushless Control Board & Switch — Compatible with Dayi 2106 Electric Wrench
Keep your Dayi 2106 brushless electric wrench running at peak performance with this direct-replacement control board and speed-control switch set. Each unit is tested before shipment to ensure reliable operation straight out of the box. Made in Mainland China.
Key Features
- Direct-Fit Compatibility: Designed specifically for the Dayi 2106 brushless electric wrench (also functions as a general brushless sensorless angle grinder / polishing machine drive board).
- Wide Voltage Support: Operates on 18V (5S lithium pack, fully charged to 21V), 300W power output. Compatible with battery packs labelled 48V, 68V, 88V, 98V, or 128VF — these are all 18V-actual (5S2P / 5S3P lithium cells).
- Compact Board Size: 5.23 × 6.30 cm — a precise drop-in form factor for quick installation.
- Pre-Tested Before Sale: Every board is functionally verified before packaging for your peace of mind.
- ABS Construction: Durable housing material to withstand workshop conditions.
Installation Tips
- Connect all wires first.
- Fix the motor securely in position.
- Install the housing/case and tighten all screws.
- Confirm the square drive shaft rotates freely without binding.
- Connect the power supply.
- Press down the speed-control switch — ensure no loose components remain inside the shell before powering on to avoid buzzing alarms or board damage.
What's in the Box
- 1 × Brushless Control Board
- 1 × Speed-Control Switch
Specifications
| Drive Voltage | 18V (fully charged: 21V) |
| Power Output | 300W |
| Board Dimensions | 5.23 × 6.30 cm |
| Material | ABS |
| Compatible Model | Dayi 2106 Brushless Electric Wrench |
| Country of Origin | Mainland China |
Note: Screen colour calibration and lighting conditions may cause slight colour differences between product images and the actual item.
Related Products You May Like
- Air Compressor Pressure Gauge 0-10/0-12/0-25 Bar | DIY Tool
- Electromagnetic Induction Tester – Coil & Circuit Fault Detector
- 360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit
Learn more: OSHA on personal protective equipment
Frequently Asked Questions
Q: Which electric wrench models is this brushless control board compatible with?
A: This brushless control board is specifically designed for the Dayi 2106 brushless electric wrench. It also works as a general-purpose sensorless brushless drive board for angle grinders and polishing machines running on an 18V (5S lithium) power system.
Q: What battery voltage does this control board require?
A: The board operates on an actual 18V supply (5-cell series lithium pack, fully charged to 21V). Battery packs labelled 48V, 68V, 88V, 98V, or 128VF are all 18V-actual designs (5S2P or 5S3P configurations) and are fully compatible.
Q: Is the control board tested before shipping?
A: Yes. Every control board and switch set is individually tested and verified to be in working order before it is packaged and shipped, ensuring you receive a fully functional replacement part.
Q: What should I do to avoid damaging the new control board during installation?
A: Follow the installation sequence carefully: connect all wires → secure the motor → fit and close the housing → tighten all screws → confirm the drive shaft spins freely → then connect power and press the speed switch. Never power on the board while components are loose inside the shell, as this can cause alarm faults or board damage.