The DC Motor 775 Motor 12V 10000RPM for RC Racing Drilling Milling Engraving is a high-speed, high-power brushed DC motor engineered for high-velocity cutting tools, CNC router spindles, precision rotary grinders, and competitive RC racing vehicles. Operating at an aggressive no-load speed of 10,000 RPM at 12V DC (capable of reaching up to ~20,000 RPM at 24V), it combines a dynamically balanced 5-pole pure-copper armature with high-flux permanent magnets and dual steel ball bearings. Designed to deliver clean, burr-free rotary machining across PCBs, plastics, soft woods, and non-ferrous alloys, this high-revving 775 variant provides the rotational speed required for miniature endmills, abrasive grinding wheels, and high-speed RC propulsion systems.

Specifications

• Motor Model / Frame Size: 775 High-Speed Brushed DC Motor (Standard Industrial Frame)
• Nominal Operating Voltage: 12 V DC
• Operating Voltage Range: 12 V to 24 V DC (Operational down to 6 V DC at reduced RPM)
• No-Load Speed: Approx. 10,000 RPM (±10% at 12V DC) / Up to 18,000–20,000 RPM (at 24V DC)
• No-Load Current Draw: Approx. 1.05 A to 1.5 A (at 12V DC)
• Rated Loaded Speed: Approx. 8,500 to 9,200 RPM (under nominal cutting load at 12V DC)
• Rated Load Current: Approx. 6.0 A to 9.0 A (at 12V DC)
• Stall Current: Up to 25 A to 30 A (at 12V DC / High instantaneous inrush surge)
• Stall Torque: Approx. 0.38 N·m to 0.45 N·m (~3.8 to 4.5 kg·cm at 12V DC)
• Bearing Configuration: Dual High-Precision Steel Ball Bearings (Front and rear shaft support)
• Armature Construction: Dynamically Balanced 5-Pole Rotor with Pure Oxygen-Free Copper Enamelled Wire
• Cooling System: High-Velocity Internal Centrifugal Impeller Fan with Casing Vents
• Output Shaft Type: Round / D-Cut Precision Ground High-Carbon Steel Shaft
• Output Shaft Dimensions:
  • Shaft Diameter: 5.0 mm (±0.05 mm standard precision tooling fit)
  • Shaft Length: Approx. 16.0 mm to 17.5 mm protruding from front boss
• Front Mounting Pattern:
  • Front Boss / Step Diameter: Approx. 17.5 mm
  • Front Boss Height: Approx. 4.5 mm to 5.0 mm
  • Mounting Holes: 2 × M4 Metric Threaded Holes spaced at 29.0 mm center-to-center
• Motor Body Dimensions: Approx. 42.0 mm Outer Diameter × 66.5 mm Body Length (Overall length including shaft: ~98 mm)
• Electrical Terminals: 2 × Standard 0.187" (4.8mm) Male Quick-Connect Spade Lugs / Solder Tabs
• Direction of Rotation: Reversible (Bidirectional CW/CCW depending on polarity)
• Net Weight: Approx. 350 g to 375 g

Features

• Aggressive 10,000 RPM High-Speed Output: Delivers the peripheral cutting speed needed for small-diameter carbide micro-endmills, rotary burrs, and diamond cutoff wheels without tearing or chipping delicate workpieces.
• Dual Ball Bearing Construction: Front and rear journals are supported by precision sealed steel ball bearings, eliminating radial wobble and maintaining low shaft runout (<0>
• Dynamically Balanced 5-Pole Rotor: Precision balanced to minimize mechanical resonance and vibration at high angular velocities, prolonging bearing and carbon brush life.
• Integrated Centrifugal Cooling Fan: An internal rotor-mounted impeller continuously draws cool air through the front ventilation ports and forces it over the armature coils, keeping operating temperatures stable under load.
• Universal 5.0mm Output Shaft: Standard 5mm shaft diameter pairs seamlessly with ER11 collet chuck extensions, JT0/B10 drill chucks, GT2 timing pulleys, and aluminum shaft couplings.

Common Applications

• High-Speed CNC Milling Spindles: Primary cutting spindle motor for desktop CNC routers (such as 3018 CNC platforms) machining FR4 PCBs, acrylic, Delrin, basswood, and aluminum panels.
• Precision Rotary Tools & Grinders: Power head for DIY Dremel-style bench grinding stations, flex-shaft carvers, polishing discs, and jewelers' lathes.
• RC Racing Boats & High-Speed Vehicles: Direct-drive marine propulsion for high-velocity RC racing speedboats, airboats, and 1/8 to 1/10 scale performance vehicles.
• Mini Table Saws & Cutoff Machines: Spinning high-speed diamond saw blades and carbide slitting discs for clean trimming of carbon fiber rods, PCB sheets, and brass tubes.
• High-Speed Centrifugal Pumps & Blowers: Supplying high rotational RPM for custom misting pumps, drone seed spreaders, and high-flow workshop dust collection impellers.

Usage Tips

• Power Supply Capacity (CRITICAL):
  • Do NOT attempt to run this high-speed motor on low-current adapters (e.g., 12V 1A or 2A). The initial startup surge and sudden machining load bites demand instantaneous currents of 15A to 25A.
  • Use a regulated switching power supply rated for at least 12V 15A to 20A (180W to 240W) or a high-discharge 3S/4S LiPo battery pack. Under-sized power units will trip their internal overcurrent protection, causing the motor to pulse, shudder, or shut off under load.
• PWM Speed Regulation:
  • To throttle rotational speed across the entire 0 to 10,000 RPM range, use an external DC Motor PWM Speed Controller rated for ≥ 30A peak (with operating voltage up to 24V/30V).
  • When reversing direction via an H-bridge or mechanical DPDT switch, always ensure the motor has come to a complete stop before reversing to avoid massive reverse EMF current spikes.
• Mounting Fasteners & Depth Safety:
  • Secure the motor using two M4 machine screws anchored into the faceplate's 29mm mounting pattern.
  • Ensure the M4 screws penetrate no more than 3.5 mm into the front face. Screws that extend deeper into the motor body will strike the rotating copper armature windings, cutting the coils and permanently destroying the motor.
• EMI & RF Noise Suppression: High-speed commutation generates continuous microscopic electrical arcing at the carbon brushes. Solder three 0.1 μF (104) 50V ceramic disc capacitors—one between the two terminal lugs, and one from each terminal lug to the outer metal can—to eliminate microcontroller resets and LCD screen glitching.
• Spindle Runout Alignment: When pressing an ER11 chuck or drill arbor onto the 5mm shaft, heat the chuck bore slightly with a heat gun or press it on smoothly using a drill press or arbor press. Never strike the end of the shaft with a hammer, as this permanently ruins the internal ball bearing races and increases runout.