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When your motion-control project demands a compact right-angle drive without the weight penalty of metal, finding a reliable plastic bevel gear in the correct module can be a real challenge. The S162A 16-tooth helical bevel gear is designed for makers, robotics enthusiasts, and small-scale automation engineers who need precise, low-noise torque transfer in tight spaces.
This gear is molded from engineering-grade plastic (typically POM or nylon-family resin) and follows a 0.5 module standard, giving it a pitch diameter of approximately 8 mm (0.31 in). The 16-tooth helical bevel profile enables smooth right-angle meshing with a mating bevel gear, reducing vibration and operating noise compared to straight-cut alternatives. Individual gear thickness is typically 6–10 mm (0.24–0.39 in) depending on the mating configuration.
Typical use cases include DIY robotic arm joints requiring 90° shaft redirection, compact CNC axis drives where space is limited, and educational model kits or STEM project assemblies that benefit from lightweight, easy-to-machine plastic gearing.
| Model | S162A |
|---|---|
| Module | 0.5 |
| Number of Teeth | 16T |
| Pitch Diameter | ≈ 8 mm (0.31 in) |
| Gear Type | Bevel Helical (Right Angle) |
| Material | Engineering Plastic (POM-type or equivalent) |
| Shaft Bore Diameter | See variant options |
| Gear Thickness | Typically 6–10 mm (0.24–0.39 in) |
| Pressure Angle | See variant options |
| Finish / Color | See variant options |
| Available Quantities | 1 pcs / 10 pcs / 100 pcs |
Module (m) is the standard metric measurement of gear tooth size. A 0.5 module gear has a pitch diameter equal to 0.5 × number of teeth, so this 16T gear has a pitch diameter of 8 mm. To mesh correctly, both gears must share the same module. If your existing gear is 0.5 mod, this gear will fit; if it is 1.0 mod or another size, it will not mesh properly.
Engineering plastic bevel gears at 0.5 module are suited for light-to-moderate loads typical of hobby robotics, model mechanisms, and small automation fixtures. They are not recommended for high-torque or high-temperature industrial continuous-duty applications. For heavy loads, consider a metal bevel gear of the same module.
POM-type and nylon-family plastics offer good moisture resistance and will not rust like steel gears. They are suitable for mildly humid indoor environments. Prolonged UV exposure or immersion in liquids may degrade some plastic compounds over time; for outdoor applications, verify the specific resin grade or consider a UV-stabilized variant.
The standard bore diameter for this model is listed in the variant options. Because the gear is molded from machinable plastic, the bore can be carefully enlarged with a hand reamer or drill press to fit custom shaft sizes typically in the 2–4 mm range common to hobby motors and servos. Always test-fit before final assembly.
You need a second 0.5 module bevel gear with a matching tooth count and pressure angle. For a 1:1 ratio right-angle drive, pair two identical 16T bevel gears. For a gear ratio, select a mating gear with a different tooth count — both must still be 0.5 module. Confirm the helix hand (left or right) matches your application's rotation direction.
Choose 1 pc for prototyping or a single-axis build. The 10 pcs option is ideal for small batch projects, classroom kits, or keeping spares on hand. The 100 pcs pack offers the best per-unit value for production runs, maker workshops, or resellers building multiple units of the same mechanism.
Mount both bevel gears so their pitch cones meet at the correct apex point — typically the intersection of the two shaft centerlines. Adjust the axial position of each gear until tooth contact is centered across the face width with minimal play. Too much backlash causes noise and lost motion; too little causes binding and accelerated wear. A light application of plastic-compatible grease will extend service life.
