Dayi 2106/169 Brushless Wrench Control Board & Speed Switch

Dayi 2106/169 Brushless Electric Wrench Control Board & Speed Switch

Keep your Dayi brushless electric wrench running at peak performance with this direct-fit replacement control board and/or speed switch. Designed specifically for Dayi 2106/169 models, this 20A drive board has been fully tested before dispatch — so you can install with confidence and get back to work fast.

Key Features

• Exact Fit: Compatible with Dayi 2106 & 169 brushless electric wrenches (torque range 224–260 Nm)
• 20A Rated Current: Handles demanding applications without overheating
• Wide Voltage Compatibility: Operates at 18V (fully charged to 21V with 5-series lithium cells); also works with battery packs labelled 48V, 68V, 88V, 98V, or 128V/TV — these are all 18V actual voltage
• 300W Power Output: Suitable for brushless sensorless angle grinders, polishing machines, and impact wrenches
• Compact Board Size: 5.2 × 6.2 cm — a direct replacement that fits the original housing
• Pre-Tested: Every board is checked before sale to ensure correct operation
• Plastic Housing: Lightweight and durable enclosure

Specifications

• Current Rating: 20A
• Drive Voltage: 18V (5S lithium, fully charged 21V)
• Power: 300W
• Board Dimensions: 5.2 × 6.2 cm
• Material: Plastic
• Country of Origin: Made in China

Package Options

• 1 × Control Board only, or
• 1 × Speed Switch only, or
• 1 × Control Board + 1 × Speed Switch (combo)

Installation Tips — Please Read Before Assembly

1. Connect all wires first before fixing the motor in place.
2. Secure the motor, then install the case and tighten all screws.
3. Confirm the square shaft on the tool head rotates freely with no jamming.
4. Connect the power supply and press the speed-control switch fully so there is no gap in the shell — any gap can trigger a buzzing alarm.
5. Follow all instructions carefully to avoid damaging the motherboard.

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For general power tool safety guidelines, refer to the OSHA Power Tools Safety resource to ensure safe handling and operation of electric power tools.

Note: Monitor color calibration and lighting conditions may cause slight differences between product images and the actual item color.

Frequently Asked Questions

Q: Which Dayi brushless wrench models is this control board compatible with?

A: This control board and speed switch are designed specifically for Dayi 2106 and Dayi 169 brushless electric wrenches. It is also suitable as a general brushless sensorless angle grinder and polishing machine drive board operating on 18V (21V fully charged) systems.

Q: What battery voltage does the Dayi 2106/169 control board support?

A: The board operates on 18V (5-series lithium batteries, fully charged to 21V). Battery packs labelled 48V, 68V, 88V, 98V, 128V, or TV are actually 18V actual-voltage packs (5S2P or 5S3P configurations) and are fully compatible with this drive board.

Q: Is the control board tested before shipping?

A: Yes. Every control board is tested and verified as operational before it leaves the warehouse, giving you peace of mind that you are receiving a working replacement part.

Q: What is included in the package?

A: You can choose between three options at checkout: (1) Control board only, (2) Speed switch only, or (3) Control board + speed switch combo — select the option that matches your repair needs.