Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When a metal gear is overkill and a generic plastic gear won't hold tolerance, makers, robotics builders, and automation engineers reach for a nylon spur gear that balances strength, weight, and quiet operation. This 1 Mod 28-tooth blue nylon spur gear with a stepped bore is designed for hobbyists and professionals who need a reliable, low-backlash pinion gear without the noise or corrosion concerns of steel.
Each gear is machined from engineering-grade blue nylon (PA66 or equivalent), offering a good balance of rigidity and self-lubrication. The module is 1 (Mod 1), tooth count is 28T, and the stepped bore accommodates shaft diameters from 5mm to 12mm (approximately 0.197" to 0.472"), making it compatible with a wide range of motor shafts and drive axles. Outside diameter is typically around 30mm (~1.18"), and face width is approximately 10–15mm (0.39"–0.59").
Typical use cases include: 3D printer extruder and axis drives where low noise is critical; small robotic arm joints and servo-driven mechanisms requiring a lightweight 1 mod plastic gear; DIY CNC and automation projects where a corrosion-resistant nylon pinion gear with step bore replaces metal components to reduce system weight.
| Module (Mod) | 1 (Mod 1 / 1M) |
|---|---|
| Number of Teeth | 28T |
| Material | Engineering Nylon (PA66-class) |
| Color | Blue |
| Bore Diameter | See variant options (5mm / 6mm / 6.35mm / 7mm / 8mm / 10mm / 12mm) |
| Outside Diameter (OD) | Approx. 30mm (~1.18") |
| Face Width | Typically 10–15mm (0.39"–0.59") |
| Bore Style | Stepped bore |
| Pressure Angle | 20° |
| Gear Type | Spur Gear (Pinion) |
| Pack Quantity | See variant options (1 / 2 / 5 / 10 PCS) |
| Weight (per piece) | See variant options |
Select the bore diameter that matches your motor or drive shaft. Common shaft sizes: 5mm and 6mm for small DC and stepper motors; 6.35mm (1/4") for imperial shafts; 7mm and 8mm for mid-range servo and gearmotor shafts; 10mm and 12mm for larger drive axles. If your shaft is between sizes, choose the next size up and use a set screw or keyway adapter to secure the gear.
Nylon gears have lower tensile strength than steel or aluminum, but they are well-suited for light-to-medium load applications such as 3D printers, small robots, and desktop automation. The advantage is significantly reduced noise, self-lubrication, and resistance to corrosion. For high-torque or heavy-load applications, consider a metal gear instead.
Yes. Engineering nylon (PA66-class) is inherently resistant to moisture, mild acids, oils, and oxidation. These gears will not rust and require no lubrication in most light-duty applications, though a small amount of dry lubricant can extend service life in continuous-duty setups.
Yes. This gear follows the standard Module 1 (Mod 1 / 1M) tooth profile with a 20° pressure angle, which is the most common metric gear standard. It will mesh correctly with any Mod 1 rack, spur gear, or pinion regardless of material (nylon, steel, aluminum, or acetal). Verify that your mating gear is also Mod 1 before ordering.
In most light-duty and intermittent-use applications, nylon gears are self-lubricating and can run dry. For continuous-duty or higher-speed applications, applying a small amount of PTFE-based or silicone dry lubricant to the tooth faces will reduce wear and extend gear life. Avoid petroleum-based greases, which can degrade some nylon grades over time.
Choose 1 PCS for prototyping or single-axis builds. Choose 2 PCS if your design uses a gear pair or you want a spare on hand. Choose 5 or 10 PCS for multi-axis machines (such as CoreXY 3D printers or multi-joint robot arms), small production runs, or to take advantage of the per-unit cost savings at higher quantities.
For a Mod 1, 28-tooth spur gear, the theoretical outside diameter (OD) is (28 + 2) × 1mm = 30mm (~1.18"). Face width is typically 10–15mm (0.39"–0.59") for this gear class. If you need exact dimensions for CAD modeling, contact us to confirm before ordering.
