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When your drivetrain demands a smooth, near-silent 90° direction change without the weight penalty of metal, most off-the-shelf gears fall short. Makers, robotics enthusiasts, and light-industrial machine builders need a module 2.5 nylon bevel gear that pairs precisely, runs quietly, and resists moisture without constant lubrication.
These miter gears are machined from engineering-grade nylon (PA66) and finished in a distinctive blue color for easy identification. Each gear features a Module 2.5 tooth profile and is available in 20-tooth (20T) or 25-tooth (25T) configurations, with bore sizes ranging from 12 mm (0.47 in) to 25 mm (0.98 in) and matching keyways from 4 mm to 8 mm to lock securely onto your shaft.
Typical use cases include DIY CNC router axis drives requiring low-noise 90° bevel gear transmission, tabletop robotics joints needing lightweight nylon miter gear pairs, and small conveyor or agitator systems where a corrosion-resistant module 2.5 gear set extends service life in humid environments.
Engineering-grade nylon tooth flanks dampen vibration and reduce gear mesh noise compared to metal alternatives — ideal for noise-sensitive workshop and lab environments.
PA66 nylon resists moisture, mild acids, and common lubricants, making these bevel gears suitable for humid or lightly wet operating conditions without surface degradation.
Nylon is significantly lighter than steel or brass, reducing rotational inertia and overall machine weight — a key advantage in robotics arms and portable equipment.
Each gear is cut to Module 2.5 standards for accurate tooth engagement. The 1:1 ratio delivers equal speed and torque transfer across the 90° axis change.
Bore options from 12 mm to 25 mm with matching keyways (4–8 mm) prevent shaft slippage under load, ensuring reliable torque transmission without set-screw-only mounting.
The distinctive blue finish makes these nylon miter gears instantly recognizable in multi-component assemblies, simplifying maintenance checks and part replacement.
| Material | Engineering-grade Nylon (PA66) |
|---|---|
| Color / Finish | Blue |
| Module | 2.5 |
| Tooth Count (Models) | 20T / 25T |
| Pressure Angle | 20° |
| Gear Ratio | 1:1 (miter / bevel pair) |
| Shaft Angle | 90° |
| Bore Diameter Range | 12 mm – 25 mm (0.47 in – 0.98 in) |
| Keyway Width Range | 4 mm – 8 mm (see variant options) |
| Outer Diameter (20T) | Typically 55–60 mm (2.17–2.36 in) |
| Outer Diameter (25T) | Typically 68–73 mm (2.68–2.87 in) |
| Operating Temperature | -30°C to +100°C (-22°F to +212°F) |
| Lubrication Required | Not required (self-lubricating nylon) |
| Sold As | 1 piece per order (pair both gears separately) |
Yes. Each listing sells one gear. For a complete 1:1 miter drive you need two matching gears of the same tooth count (both 20T or both 25T). Add two units to your cart, selecting the correct bore size for each shaft.
Measure your shaft diameter with a caliper. Select the bore that matches your shaft (e.g., 16 mm shaft → 16 mm + 5 mm keyway variant). The keyway locks the gear rotationally; ensure your shaft has a matching keyway cut to the same width and depth.
PA66 nylon gears are suited for light-to-medium duty applications — typically up to a few Nm of torque at moderate speeds (under 500 RPM). For heavy-duty or high-speed applications, consider steel or brass bevel gears instead. Contact us to confirm suitability for your specific load.
Yes. Nylon (PA66) naturally resists moisture, mild chemicals, and oxidation. These gears will not rust and require no lubrication, making them a reliable choice for humid workshops, aquaponics systems, or outdoor enclosures with light moisture exposure.
No. Mixing 20T and 25T gears of the same module will result in incorrect tooth mesh geometry and premature wear. These are designed as matched miter pairs: 20T with 20T, or 25T with 25T, for a true 1:1 ratio at 90°.
No lubrication is required. Nylon is inherently self-lubricating, which reduces maintenance and eliminates the risk of lubricant contamination in food-adjacent or clean-room adjacent DIY builds. A light application of dry PTFE spray can extend life in high-cycle applications.
The bore is machined to a standard H7 tolerance, suitable for a sliding fit on a correctly sized shaft. If you need a tighter interference fit, consult a machinist to lightly ream the bore. Always verify your shaft is within tolerance before assembly.
