{"product_id":"dayi-2106-169-brushless-electric-wrench-control-board-speed-switch","title":"Dayi 2106\/169 Brushless Wrench Control Board \u0026 Speed Switch","description":"\n\u003ch2\u003eDayi 2106\/169 Brushless Electric Wrench Control Board \u0026amp; Speed Switch\u003c\/h2\u003e\n\u003cp\u003eKeep 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.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExact Fit:\u003c\/strong\u003e Compatible with Dayi 2106 \u0026amp; 169 brushless electric wrenches (torque range 224–260 Nm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e20A Rated Current:\u003c\/strong\u003e Handles demanding applications without overheating\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Voltage Compatibility:\u003c\/strong\u003e 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\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e300W Power Output:\u003c\/strong\u003e Suitable for brushless sensorless angle grinders, polishing machines, and impact wrenches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Board Size:\u003c\/strong\u003e 5.2 × 6.2 cm — a direct replacement that fits the original housing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePre-Tested:\u003c\/strong\u003e Every board is checked before sale to ensure correct operation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlastic Housing:\u003c\/strong\u003e Lightweight and durable enclosure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e 20A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDrive Voltage:\u003c\/strong\u003e 18V (5S lithium, fully charged 21V)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e 300W\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBoard Dimensions:\u003c\/strong\u003e 5.2 × 6.2 cm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e Made in China\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Options\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Control Board \u003cem\u003eonly\u003c\/em\u003e, \u003cstrong\u003eor\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003e1 × Speed Switch \u003cem\u003eonly\u003c\/em\u003e, \u003cstrong\u003eor\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003e1 × Control Board + 1 × Speed Switch (combo)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Tips — Please Read Before Assembly\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eConnect all wires first before fixing the motor in place.\u003c\/li\u003e\n  \u003cli\u003eSecure the motor, then install the case and tighten all screws.\u003c\/li\u003e\n  \u003cli\u003eConfirm the square shaft on the tool head rotates freely with no jamming.\u003c\/li\u003e\n  \u003cli\u003eConnect the power supply and press the speed-control switch fully so there is \u003cstrong\u003eno gap\u003c\/strong\u003e in the shell — any gap can trigger a buzzing alarm.\u003c\/li\u003e\n  \u003cli\u003eFollow all instructions carefully to avoid damaging the motherboard.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eRelated Products You May Need\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-10-rc-car-negative-pressure-shock-dampers-metal-pack-of-2\"\u003e1\/10 RC Car Negative Pressure Shock Dampers – Metal Pack of 2\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/sata-power-splitter-cable-1-to-5-18awg-hdd-ssd-extension\"\u003e1 to 5 SATA Power Splitter Cable 18AWG | HDD SSD Extension\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor general power tool safety guidelines, refer to the OSHA Power Tools Safety resource to ensure safe handling and operation of electric power tools.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Monitor color calibration and lighting conditions may cause slight differences between product images and the actual item color.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Which Dayi brushless wrench models is this control board compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What battery voltage does the Dayi 2106\/169 control board support?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is the control board tested before shipping?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is included in the package?\u003c\/h4\u003e\n\u003cp\u003eA: 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.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Which Dayi brushless wrench models is this control board compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This control board and speed switch are designed specifically for Dayi 2106 and Dayi 169 brushless electric wrenches. 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