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When your CNC router, 3D printer, or automation rig demands quiet, reliable power transmission without the weight penalty of metal, finding the right spur gear becomes critical. Engineers, makers, and small-batch manufacturers who need consistent tooth engagement across a wide ratio range rely on 2 Module nylon pinion gears to keep their drives running smoothly and silently.
These 2M nylon spur gears are precision-molded from engineering-grade nylon (PA66), offering a module of 2 mm and a pressure angle of 20°. The tooth count spans 12 T to 30 T, with outer diameters ranging from approximately 28 mm (12T) to 64 mm (30T) — roughly 1.1 in to 2.5 in. Bore options cover 8 mm plain bore up to 25 mm with matching keyway slots (4 mm, 5 mm, 6 mm, 8 mm, or 9 mm keyways depending on bore size), letting you mount directly to stepper motor shafts or servo output shafts without additional machining.
Typical use cases include stepper-motor-driven CNC axis drives where metal-on-metal noise is unacceptable, lightweight robotic joint assemblies requiring self-lubricating gear pairs, and DIY automation conveyor systems where corrosion resistance matters more than maximum torque capacity.
Nylon-on-metal or nylon-on-nylon meshing significantly reduces gear noise compared to all-metal drives — ideal for enclosed CNC enclosures and lab environments.
Engineering-grade PA66 nylon weighs a fraction of steel or aluminum equivalents, reducing rotational inertia and easing load on stepper motors.
Nylon resists moisture, mild chemicals, and oxidation — no rust, no surface treatment required, suitable for humid workshop or outdoor enclosure use.
Plain bores from 8 mm to 10 mm and keyed bores from 12 mm to 25 mm (with 4–9 mm keyways) cover the most common stepper and servo shaft standards without custom machining.
12 T through 30 T in a single product family lets you dial in your gear ratio precisely — mix and match tooth counts to achieve the speed/torque trade-off your application needs.
Available in packs of 1, 2, or 5 pieces — order a single gear for prototyping or stock up in fives for production runs and spare-parts inventory.
| Module | 2 mm (2M) |
|---|---|
| Pressure Angle | 20° |
| Tooth Count (T) | 12T, 13T, 15T, 16T, 17T, 18T, 20T, 22T, 23T, 24T, 25T, 26T, 28T, 30T |
| Outer Diameter Range | Approx. 28–64 mm (1.1–2.5 in) — varies by tooth count |
| Bore Options | 8 mm, 10 mm, 12 mm + 4 mm keyway, 14 mm + 5 mm keyway, 15 mm + 5 mm keyway, 16 mm + 5 mm keyway, 18 mm + 6 mm keyway, 20 mm + 6 mm keyway, 22 mm + 6 mm keyway, 24 mm + 8 mm keyway, 25 mm + 8 mm keyway, 24 mm + 9 mm keyway, 25 mm + 9 mm keyway |
| Material | Engineering-grade Nylon (PA66) |
| Gear Face Width | See variant options |
| Hub Diameter | See variant options |
| Pack Quantity | 1 pc / 2 pcs / 5 pcs |
| Finish | Natural nylon (no coating required) |
Your gear ratio is determined by dividing the driven gear tooth count by the driving gear tooth count. For example, pairing a 15T pinion with a 30T gear gives a 2:1 reduction — halving speed and doubling torque. Select tooth counts based on the speed and torque trade-off your motor and load require. For CNC axis drives, ratios between 1:1 and 3:1 are most common.
Standard NEMA 17 stepper motors have a 5 mm output shaft. These gears start at 8 mm bore, so you will need a 5-mm-to-8-mm shaft adapter or coupler, or select a gear from our 5 mm bore range. For NEMA 23 motors (6.35 mm or 8 mm shafts), the 8 mm plain bore variant fits directly. Always confirm your motor's shaft diameter before ordering.
PA66 nylon gears handle moderate torque loads well and are widely used in desktop CNC routers, 3D printers, and light automation. They are not recommended for high-torque, high-speed industrial drives where metal gears are required. For typical stepper-motor-driven axes running at low-to-medium speeds, nylon gears provide excellent service life with the added benefit of reduced noise and self-lubrication.
Nylon is inherently self-lubricating, so these gears can run dry in most light-duty applications. For extended service life under continuous or higher-load operation, a light application of PTFE-based dry lubricant or white lithium grease is recommended. Avoid petroleum-based oils, which can degrade nylon over time.
Yes. Any 2 Module gear with a 20° pressure angle — whether nylon, steel, or aluminum — will mesh correctly with these gears. This makes them easy to integrate into existing 2M gear trains or to pair with metal rack-and-pinion systems for CNC linear motion.
A plain bore (8 mm or 10 mm) is a smooth cylindrical hole — the gear is typically secured to the shaft with a set screw or press fit. A keyway bore includes a rectangular slot machined into the bore wall; a matching key inserted between the shaft and gear prevents rotational slipping under load, making it the preferred choice for higher-torque or reversing-load applications.
Yes. PA66 nylon resists moisture absorption better than many engineering plastics and does not rust or corrode. It is suitable for humid workshops, light outdoor enclosures, and environments with mild chemical exposure. Prolonged immersion in water or exposure to strong acids/bases is not recommended, as it can cause dimensional changes over time.
