The DC Motor 775 Motor 12V 5000RPM for RC Racing Drilling Milling Engraving is a heavy-duty, high-torque brushed DC motor engineered for power tools, miniature machine tools, robotics drives, and heavy RC models. Built on the industry-standard 775 cylindrical frame, it features a balanced 5-pole armature wound with pure copper wire, high-strength ferrite permanent magnets, and dual ball bearings on the front and rear shaft journals. Operating at a moderate no-load speed of 5000 RPM at 12V DC, this motor prioritizes low-end torque, reduced operating temperature, and continuous mechanical endurance, making it the ideal direct-drive power plant for benchtop drill presses, PCB milling spindles, hobby lathes, CNC engraving heads, and high-traction electric vehicles.

Specifications

• Motor Model / Frame Size: 775 Brushed DC Motor (Standard Industrial Profile)
• Nominal Operating Voltage: 12 V DC
• Operating Voltage Range: 6 V to 24 V DC
• No-Load Speed: Approx. 5000 RPM (at 12V DC)
• No-Load Current Draw: Approx. 0.8 A to 1.2 A (at 12V DC)
• Rated Loaded Speed: Approx. 4200 to 4500 RPM (under nominal tool load)
• Rated Load Current: Approx. 4.0 A to 6.0 A (at 12V DC)
• Stall Current: Up to 15 A to 20 A (at 12V DC / High momentary stall surge)
• Stall Torque: Approx. 0.35 N·m to 0.50 N·m (~3.5 to 5.0 kg·cm at 12V DC)
• Bearing Configuration: Dual High-Precision Ball Bearings (Front and rear shaft support)
• Armature Construction: Dynamically Balanced 5-Pole Rotor with Pure Oxygen-Free Copper Enamelled Wire
• Cooling System: Internal Centrifugal Cooling Fan Impeller with Housing Air Vents
• Output Shaft Type: Round / D-Cut Precision Ground Steel Shaft
• Output Shaft Dimensions:
  • Shaft Diameter: 5.0 mm (±0.05 mm standard tooling fit)
  • Shaft Length: Approx. 16.0 mm to 17.5 mm protruding from the 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 380 g

Features

• High Low-End Torque at 5000 RPM: Unlike high-speed 10,000+ RPM variants that stall easily under drill bit pressure, this 5000 RPM winding delivers sustained cutting torque and resists bogging down when machining hardwoods, acrylics, and non-ferrous metals.
• Dual Ball Bearing Journals: Front and rear shaft sections ride on sealed steel ball bearings rather than cheap sintered bronze bushings, dramatically reducing axial play, minimizing runout for precision drilling, and extending bearing lifespan.
• Integrated Centrifugal Cooling Fan: An internal rotor-mounted impeller continuously draws cool air through the front ventilation slots and expels it out the rear, preventing heat buildup during long CNC cutting jobs.
• Replaceable Carbon Brushes: High-conductivity carbon brush assemblies ensure low electrical resistance, stable current delivery, and smooth commutating action across the copper segmented commutator.
• Universal 5.0mm Output Shaft: Standard 5mm shaft diameter pairs seamlessly with ER11 collet chucks, JT0 drill chucks, timing pulleys (GT2/HTD), and flexible jaw couplers.

Common Applications

• Mini Benchtop Drill Presses & PCB Drills: Spindle motor paired with a JT0, B10, or ER11 collet chuck for drilling holes through fiberglass FR4 boards, plastic enclosures, and soft metals.
• Hobby CNC Routers & Engravers: Compact cutting spindle on desktop CNC machines (such as 3018 CNC routers) for engraving wood, acrylic sheet, MDF, and copper-clad PCBs.
• Benchtop Circular Saws & Cutoff Tools: Powering small table saws, diamond cutoff blades, and hobbyist lapidary trimming discs.
• Heavy RC Vehicles & Bait Boats: Direct or geared propulsion for large 1/8 and 1/5 scale RC crawler rigs, electric go-karts, robotic lawnmowers, and marine RC boats.
• Electric Screwdrivers & Actuators: Supplying driving power for custom motorized scissor lifts, heavy linear rail actuators, and automated conveyor drives.

Usage Tips

• Power Supply Sizing (CRITICAL):
  • Do NOT power this motor with low-current wall adapters (e.g., 12V 1A or 2A). When starting up or biting into material, the 775 motor demands instantaneous current surges between 10A and 15A.
  • Use a switching power supply rated for at least 12V 10A to 15A (120W to 180W) or a high-discharge 3S LiPo battery. Underpowered power supplies will trigger internal overcurrent protection and cause the motor to stutter or cut out.
• Speed & Direction Control:
  • To control motor speed smoothly, pair it with a DC Motor PWM Speed Controller rated for ≥ 20A continuous (e.g., 10V–50V 30A PWM controller).
  • Reversing the polarity of the two supply leads reverses the rotational direction. When using an H-bridge driver, ensure the driver is equipped with flyback diodes capable of absorbing high inductive spike currents.
• Mounting & Alignment:
  • Fasten the motor using two M4 screws through the front faceplate into a rigid metal 775 L-bracket.
  • Ensure the M4 mounting screws do not penetrate more than 3.5 mm to 4.0 mm into the motor body. Screws driven too deeply will collide with and destroy the spinning armature windings inside the casing.
• Suppressing Electrical Noise (EMI): Brushed DC motors produce electrical arcing across their carbon brushes, emitting high-frequency electromagnetic noise. Solder three 0.1 μF (104) ceramic capacitors—one across the two motor terminals, and one from each terminal to the metal motor can—to prevent reset glitches on nearby microcontrollers and Arduino boards.
• Thermal Management on Continuous Duty: Although equipped with an internal impeller fan, ensure the front and rear ventilation slots are not obstructed by mounting brackets. For continuous heavy milling operations lasting over an hour, consider fitting an external clip-on aluminum heat sink or a 40mm auxiliary cooling fan over the motor barrel.