Brushless Motor Control Board for Dayi 2106/161/169 Wrench 18V

Brushless Motor Control Board & Switch Assembly — Compatible with Dayi 2106 / 161 / 169 Electric Wrenches

Keep your brushless power tools running at peak performance with this high-quality Motor Control Board, Motor & Switch Assembly, purpose-built for Dayi 2106, 161, and 169 brushless electric wrenches. Whether you're repairing, upgrading, or rebuilding, this sensorless drive control board delivers reliable 300W power output and broad compatibility with a wide range of brushless angle grinders and wrench models.

Key Specifications

• Compatible Models: Dayi 2106 / 161 / 169 Brushless Electric Wrench
• Drive Voltage: 18V (fully charged: 21V) — supports 5-cell lithium string configurations
• Power Output: 300W
• Battery Compatibility: Battery packs labeled 48V, 68V, 88V, 98V, 128VF, or TV (actual operating voltage 18V; 5S2P / 5S3P lithium configurations, fully charged at 21V)
• Package Includes: 1× Motor, 1× Control Board, 1× Switch (default: small switch)
• Packaging: 1 complete set
• Country of Origin: Made in Mainland China

Why Choose This Control Board Assembly?

• Sensorless Brushless Technology: Designed for brushless, sensorless motors — delivering greater torque and higher efficiency compared to conventional brush motors.
• Outstanding Durability: Brushless motor design withstands repeated heavy-duty use, even in demanding work environments, far outlasting traditional brushed motors.
• Broad Compatibility: Functions as a general-purpose control board suitable for various brushless angle grinders and wrench brands and models, offering excellent value and flexibility.
• DIY-Friendly Installation: Engineered for easy installation — no professional technician required. Simply follow the included instructions for a smooth replacement experience.
• Complete Assembly Kit: Includes the motor, control panel, and switch in one convenient set so you have everything needed for a full rebuild or replacement.

Important Installation Notes

1. Connect the wiring before fixing the motor into place.
2. Secure the motor, install the casing, and tighten all screws firmly.
3. Confirm the square shaft rotates freely without binding before connecting power.
4. Press the speed control switch fully so there is no gap in the shell — failure to do so may trigger a buzzing alarm.
5. Always follow the setup sequence to protect the control board from damage.

Measurement & Color Notes

Due to manual measurement, please allow a tolerance of 1–3mm. Monitor color calibrations may cause slight differences between product images and the actual item received.

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External Resources

For safe power tool use and electrical safety guidelines, refer to the OSHA Electrical Safety Resource and the CPSC Power Tool Safety Center.

Frequently Asked Questions

Q: Which electric wrench models is this motor control board compatible with?

A: This brushless motor control board assembly is specifically compatible with Dayi 2106, 161, and 169 brushless electric wrenches. It is also a general-purpose sensorless drive board suitable for many other brushless angle grinder and wrench models from various brands.

Q: What voltage and battery types does this control board support?

A: The control board operates at 18V (fully charged to 21V). It supports battery packs labeled 48V, 68V, 88V, 98V, 128VF, or TV — these all use 5-series lithium cell configurations (5S2P or 5S3P) with an actual working voltage of 18V and a full-charge voltage of 21V. Total power output is 300W.

Q: What is included in the package?

A: Each package includes one motor, one control board, and one switch (default small switch) — everything you need for a complete motor assembly replacement in a single kit.

Q: Do I need a professional to install this control board?

A: No professional is required. The assembly is designed to be user-friendly and straightforward. Simply follow the recommended installation sequence: connect wiring first, mount the motor, install the housing, tighten screws, verify the shaft rotates freely, then connect power and engage the switch.