0.5/0.8/1/1.5 Module 20T to 60T Gear Copper Worm Wheel Gear & Worm Gear Shaft

The module determines the tooth size and load capacity. Smaller modules (0.5M, 0.8M) suit light-duty, compact mechanisms such as camera pan-tilt heads or small robotic joints. Larger modules (1M, 1.5M) handle higher torque loads in conveyor drives, indexing tables, and motorized stages. Match the module of the worm wheel and worm rod — mixing modules will result in no mesh.

The gear ratio equals the number of teeth on the worm wheel divided by the number of starts on the worm rod. For a single-start worm rod paired with a 30T worm wheel, the ratio is 30:1. This means the output shaft turns once for every 30 input shaft revolutions, providing significant speed reduction and torque multiplication in a compact package.

Brass worm wheels offer low friction, quiet operation, and good corrosion resistance, making them the most common choice for general-purpose and indoor applications. 45 steel worm rods provide higher tensile strength for heavier loads in dry environments. Stainless steel is recommended for humid, wet, or corrosive environments where oxidation resistance is critical, such as outdoor equipment or washdown-duty machinery.

The bore keyway notation indicates the bore diameter followed by the keyway width × depth. For example, "12mm / 4×2mm" means the bore is 12 mm in diameter with a 4 mm wide by 2 mm deep keyway slot. This keyway accepts a matching key on your shaft to transmit torque without relying solely on a set screw, which is important for high-torque or reversing-load applications. Verify your shaft's keyway dimensions before selecting a bore variant.

Worm gear sets with a low lead angle (typically single-start worms at small modules) exhibit self-locking behavior, meaning the output load cannot back-drive the input. This is useful for lifting, positioning, and indexing applications where you need the load to hold position when the motor is off. However, self-locking efficiency is lower than non-locking configurations, so factor this into your power budget. Confirm the lead angle of your selected variant if back-drive prevention is a critical requirement.

The type designation refers to the shaft configuration of the worm rod. A-Type features a standard straight shaft on both ends for direct coupling. B-Type has an extended shaft on one end for use with longer housings or dual-bearing support. C-Type includes a flanged end for face-mounting to a gearbox housing. L-Type is a long-shaft variant designed for applications requiring extended reach or where the worm must span a wider housing. Select the type that matches your gearbox housing or mounting arrangement.

Yes. These worm gear sets are commonly paired with NEMA 17 or NEMA 23 stepper motors and small servo motors in robotics and CNC applications. Ensure the worm rod bore matches your motor shaft diameter, and use a keyway bore variant or set-screw collar for secure coupling. For high-cycle or high-speed stepper applications, brass worm wheels with stainless steel rods are recommended to minimize wear.