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When your CNC router, 3D printer, or robotic arm demands consistent torque transfer without backlash, choosing the wrong gear module or bore size can derail an entire build. These 1 Module (1M) pinion spur gears are engineered for makers, automation integrators, and small-batch manufacturers who need reliable, dimensionally accurate components that drop straight into their drivetrain.
Each gear is machined to a 1 Module (1M) pitch, with tooth counts ranging from 10T to 19T and bore diameters spanning 4 mm (0.16 in) to 12 mm (0.47 in). Outer diameters range from approximately 12 mm (0.47 in) for the 10T up to approximately 21 mm (0.83 in) for the 19T. Available materials include 45 carbon steel, blue engineering-grade nylon, 304 stainless steel, and a D-hole variant for positive shaft engagement. Single-piece and 10-pack quantities are offered for prototyping and production runs alike.
Typical applications include CNC rack-and-pinion linear drives, stepper motor output shafts in 3D printers and laser cutters, lightweight robotic joint actuators requiring low-noise nylon gearing, and corrosion-resistant stainless steel drives in food-adjacent or humid environments.
10T through 19T tooth counts with bore options from 4 mm to 12 mm (including 6.35 mm / 1/4 in for imperial shafts), covering the majority of hobby and light-industrial shaft standards.
45 carbon steel for strength, blue engineering nylon for low noise and self-lubrication, 304 stainless steel for corrosion resistance, and D-hole variants for positive shaft locking without set screws.
Machined to 1M pitch standard, ensuring accurate mesh with any 1M-compatible rack or mating gear. Consistent tooth profile minimises vibration and wear in continuous-duty applications.
Standard round (No Step) bores suit set-screw or press-fit mounting; D-hole bores provide a flat for positive rotational engagement, eliminating shaft slip under load.
Order 1 piece for prototyping or 10 pieces for production builds at a reduced per-unit cost — ideal for batch assembly of CNC machines, conveyor systems, or robotic platforms.
Suited for CNC rack-and-pinion drives, stepper/servo motor pinions, 3D printer extruder gears, laser cutter gantries, and lightweight robotic joint actuators requiring compact 1M gearing.
| Module | 1M (1 Module) |
|---|---|
| Tooth Count | 10T, 12T, 14T, 15T, 16T, 17T, 18T, 19T |
| Bore Diameter | 4 mm / 5 mm / 6 mm / 6.35 mm / 7 mm / 8 mm / 10 mm / 11 mm / 12 mm; D-hole: 5×4.5 mm, 6×5 mm, 6×5.5 mm, 8×7 mm, 8×7.5 mm |
| Outer Diameter (approx.) | 12 mm (10T) – 21 mm (19T); OD = (Teeth + 2) × Module |
| Material Options | 45 Carbon Steel / Blue Engineering Nylon / 304 Stainless Steel |
| Bore Style | No Step (round) / D-hole |
| Pressure Angle | 20° |
| Quantity Options | 1 piece / 10 pieces |
| Finish | See variant options |
| Weight (per piece) | See variant options |
Tooth count determines the gear ratio when paired with a rack or mating gear. A lower tooth count (e.g., 10T) gives a higher reduction ratio and more torque per motor revolution, while a higher count (e.g., 19T) increases linear speed. For CNC rack-and-pinion drives, calculate required travel speed and motor RPM to select the optimal tooth count. As a reference, a 1M 15T pinion on a 1M rack moves approximately 47.1 mm per revolution.
45 carbon steel offers the highest strength and is suitable for most CNC and robotic applications with adequate lubrication. Blue engineering nylon is self-lubricating, lightweight, and runs quietly — ideal for low-load, noise-sensitive environments like desktop 3D printers. 304 stainless steel is the best choice for humid, wet, or food-adjacent environments where corrosion resistance is critical. D-hole variants are available for applications requiring positive shaft engagement without relying solely on a set screw.
A No Step (round) bore is a standard cylindrical hole that is typically secured to a shaft using a set screw or press fit. A D-hole bore has a flat machined on one side matching a D-shaped shaft, providing a positive mechanical lock that prevents the gear from rotating on the shaft under load. D-hole variants are recommended for higher-torque applications or where set-screw loosening is a concern.
Yes — all gears in this listing are machined to the 1 Module (1M) standard with a 20° pressure angle, which is the most common metric gear standard. They will mesh correctly with any 1M-compatible rack, ring gear, or spur gear from any manufacturer that follows the same standard. Always confirm the module and pressure angle of your existing components before ordering.
Measure your motor or drive shaft diameter with a digital caliper. Common stepper motor shaft diameters are 5 mm and 6.35 mm (1/4 in). Servo motors often use 6 mm or 8 mm shafts. Select the bore size that matches your shaft exactly — a loose fit will cause backlash and wear, while an oversized bore cannot be corrected without machining. If your shaft is D-shaped, select the corresponding D-hole variant (e.g., 5×4.5 mm means 5 mm shaft diameter with a 4.5 mm flat-to-flat D dimension).
Yes. The 10-piece pack is priced at a lower per-unit cost than purchasing 10 individual pieces separately. This makes the 10-pack the recommended choice for production builds, batch assembly, or keeping spares on hand for ongoing projects. Select your preferred gear specification and then choose the "& 10" quantity option in the Bore & Amount selector.
45 carbon steel and stainless steel gears benefit from periodic lubrication with a light machine oil or grease to reduce wear and extend service life, especially in continuous-duty applications. Blue nylon gears are self-lubricating and typically do not require additional lubrication for light to medium loads, making them suitable for dry-running environments. Avoid petroleum-based lubricants on nylon gears as they may cause swelling over time.
