Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When a stripped or undersized gear stalls your build, every hour of downtime costs you. Hobbyists, robotics engineers, and small-scale machine builders who need a reliable, drop-in pinion gear for motor output shafts and drive trains will find this Module 1 spur cylindrical gear series a dependable solution — available in 10 to 20 tooth counts to match a wide range of gear ratios.
Each gear in this series is machined to Module 1 (1 Mod) standards, with a straight-tooth spur profile and a precision-bored center hole ranging from 4 mm (0.157 in) to 14 mm (0.551 in). Tooth counts span 10T through 20T, giving you a pitch circle diameter range of approximately 10 mm (0.394 in) to 20 mm (0.787 in). The compact cylindrical body suits tight shaft-to-shaft center distances common in compact drive assemblies.
Typical use cases include DC motor pinion drives in desktop CNC routers, servo output gears in robotic arm joints, and reduction stage gears in 3D printer extruder assemblies — all applications where a consistent 1 Mod tooth profile and accurate bore sizing are critical for low-backlash power transmission.
Conforms to the M1 gear module standard, ensuring direct mesh compatibility with any M1 rack or mating spur gear without custom modification.
Nine tooth count options from 10 to 20 teeth let you dial in the gear ratio and pitch circle diameter your drive system requires.
Inner hole options from 4 mm to 14 mm (including 6.35 mm / ¼ in and an 8 mm keyway variant) cover the most common motor and shaft diameters used in hobby and light industrial drives.
The straight-tooth spur profile and short face width keep axial load minimal, making these gears well-suited for high-speed, low-torque motor output stages.
Machined tooth geometry maintains consistent pitch spacing across the full tooth count range, reducing vibration and noise in continuous-duty drive applications.
Order a single gear for prototyping or a 10-piece pack for production runs and spares inventory — all at the same consistent specification.
| Gear Module | 1 (M1) |
|---|---|
| Tooth Profile | Straight spur (cylindrical) |
| Tooth Count Range | 10T, 12T, 14T, 15T, 16T, 17T, 18T, 19T, 20T |
| Pitch Circle Diameter | 10 mm – 20 mm (varies by tooth count) |
| Inner Hole (Bore) Options | 4 mm, 5 mm, 6 mm, 6.35 mm, 7 mm, 8 mm, 10 mm, 12 mm, 14 mm, 8 mm (3×1.4 mm keyway) |
| Face Width | See variant options |
| Pressure Angle | 20° (standard) |
| Material | See variant options |
| Surface Finish | See variant options |
| Pack Quantity | 1 pc / 5 pcs / 10 pcs (select above) |
| Weight (per pc) | See variant options |
The tooth count determines the pitch circle diameter (PCD) and the gear ratio when paired with a mating gear. For a Module 1 gear, PCD = tooth count × 1 mm. A 10T gear has a 10 mm PCD; a 20T gear has a 20 mm PCD. Calculate your required gear ratio (driver teeth ÷ driven teeth) and select the tooth count that achieves it within your available center distance.
Match the inner hole to your motor or drive shaft diameter. Common motor shaft sizes are 4 mm, 5 mm, 6 mm, and 8 mm. The 6.35 mm option suits ¼-inch imperial shafts. The "8 mm (3×1.4 mm)" variant includes a keyway slot for positive torque transmission without set screws. If your shaft is between listed sizes, select the next size up and use a shaft collar or adhesive retainer.
Yes. Any gear or rack labeled Module 1 (M1) with a 20° pressure angle will mesh correctly with these gears. Module is the fundamental compatibility parameter — as long as both mating components share the same module, tooth profiles will engage properly regardless of tooth count differences.
These are compact M1 pinion gears intended for light-duty to medium-duty motor drive applications such as robotics, desktop CNC, and 3D printer drives. Exact torque ratings depend on material, face width, and operating speed. For high-torque or continuous industrial duty, contact us to confirm suitability before ordering.
Corrosion resistance depends on the specific material variant. Metal variants may require periodic lubrication or a protective coating in humid or outdoor environments. If corrosion resistance is a priority, contact us to confirm the available material options and their surface treatment before selecting your variant.
Yes. Module 1 spur gears are widely used in 3D printer extruder drives, CNC router axis drives, and small robotic actuators. Select the tooth count that matches your required gear ratio and the bore size that fits your stepper or servo motor shaft. The 1 pc option is ideal for prototyping before committing to a larger quantity.
The standard 8 mm bore is a plain round hole — the gear is secured to the shaft using a set screw or press fit. The "8 mm (3×1.4 mm)" variant has a keyway slot machined into the bore (3 mm wide × 1.4 mm deep), which accepts a standard key for positive, slip-free torque transmission. Choose the keyway variant when your shaft has a matching keyway and you need reliable torque transfer under reversing or shock loads.
