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When a noisy metal gear or an oversized pinion is slowing down your build, makers and engineers reach for a low-backlash plastic alternative that won't strip under moderate loads. This 1 Mod 30-tooth blue nylon spur gear with a stepped bore is designed for hobbyists, robotics builders, and small-machine designers who need a reliable, corrosion-resistant drive component without the weight or cost of steel.
Each gear is machined from engineering-grade blue nylon (PA66 or equivalent), offering a good balance of toughness, self-lubrication, and dimensional stability. The module is 1 (Mod 1), tooth count is 30T, and the pitch diameter is 30 mm (≈ 1.18 in). The stepped bore accommodates shaft diameters from 5 mm to 15 mm (0.197 in – 0.591 in), covering the most common motor and shaft sizes used in DIY and light-industrial applications. Overall gear width is typically 10–15 mm (0.39–0.59 in) depending on bore selection.
Typical use cases include 3D printer extruder drives and Z-axis lead-screw couplings, small robotic arm joints requiring a quiet 1 mod spur gear pinion, and desktop CNC or automation projects needing a lightweight plastic gear with step bore for compact assemblies.
Made from PA66-class blue nylon for reliable toughness, inherent self-lubrication, and resistance to oils and mild chemicals — no additional grease required for light-duty cycles.
Standard 1M module with 30 teeth gives a 30 mm pitch diameter and 20° pressure angle, meshing cleanly with any Mod 1 rack or mating gear for predictable torque transmission.
The stepped bore design fits shafts from 5 mm to 15 mm (0.197–0.591 in), covering stepper motor shafts, servo output shafts, and standard metric/imperial drive shafts in one SKU family.
Nylon-on-metal or nylon-on-nylon meshing significantly reduces gear noise compared to all-metal drives — ideal for desktop robots, printers, and quiet automation enclosures.
At a fraction of the weight of steel equivalents, these plastic spur gears reduce inertia in high-cycle applications and will not rust in humid or lightly wet environments.
Available in 1 PCS, 2 PCS, or 5 PCS packs — order a single gear for prototyping or a multi-pack for production builds and spares inventory.
| Module (Mod) | 1 (Mod 1 / 1M) |
|---|---|
| Number of Teeth | 30T |
| Pitch Diameter | 30 mm (1.18 in) |
| Pressure Angle | 20° |
| Bore Diameter | 5 / 6 / 6.35 / 7 / 8 / 10 / 12 / 14 / 15 mm (see variant options) |
| Gear Face Width | Typically 10–15 mm (0.39–0.59 in) |
| Material | Engineering nylon (PA66-class) |
| Color | Blue |
| Bore Type | Stepped bore (with step) |
| Gear Type | Spur gear (pinion) |
| Tooth Profile | Standard involute |
| Pack Quantity | 1 PCS / 2 PCS / 5 PCS (see variant options) |
| Weight (per piece) | See variant options |
Select the bore diameter that matches your motor or drive shaft. Common stepper motor shafts are 5 mm or 6.35 mm (1/4 in); servo and gear-motor shafts often use 6 mm, 8 mm, or 10 mm. If your shaft is slightly undersized, a set-screw hub or shaft collar can compensate. The stepped bore design means the gear seats at a defined shoulder — confirm your shaft length clears the step before ordering.
PA66-class nylon gears are suited for light-to-moderate torque applications — typically up to a few Newton-meters at low-to-medium speeds (under 500 RPM for continuous duty). They are not recommended for high-shock or heavy-load industrial drives. For robotics, 3D printers, and small automation, they perform reliably within these limits.
Yes. Nylon is inherently resistant to rust and corrosion, making it suitable for humid workshops, light outdoor enclosures, and environments where metal gears would oxidize. Avoid prolonged immersion in water or exposure to strong solvents, which can cause dimensional swelling over time.
Yes — any gear or rack with Module 1 (1M) and a 20° pressure angle will mesh correctly with this 30-tooth spur gear. This includes Mod 1 steel racks, aluminum pinions, and other nylon spur gears in the same module family. Always verify the module and pressure angle of your mating component before assembly.
Nylon is self-lubricating under normal operating conditions, so no grease is required for light-duty use. For higher speeds or loads, a small amount of dry PTFE spray or light machine oil on the tooth faces can extend service life and reduce wear on the mating gear.
Choose 1 PCS for prototyping or single-axis builds. The 2 PCS pack suits dual-motor or mirrored-axis designs (common in CoreXY 3D printers). The 5 PCS pack offers the best per-unit value for production runs, classroom kits, or keeping spares on hand for ongoing projects.
With Module 1 and 30 teeth, the pitch diameter is 30 mm. Gear ratio is determined by the tooth count of the mating gear divided by 30. For example, pairing with a 15-tooth pinion gives a 2:1 reduction; pairing with a 60-tooth gear gives a 2:1 speed increase on the output shaft.
