Product Overview
A Plastic Worm Wheel meshes with a worm screw to provide compact right-angle speed reduction. It is used in wiper drives, seat mechanisms, adjustment actuators, and positioning systems that need a high ratio and controlled resistance to reverse movement from one gear stage.
Key Advantages
High Reduction in a Single Stage
A worm-and-wheel arrangement combines a 90° change in shaft direction with a large speed reduction. The current reference wheel has a 50 mm outer diameter, 40 teeth, and a 12 mm bore. It fits compact actuator layouts that would otherwise require several spur stages.
Low-Friction Steel-Worm Pairing
The wheel uses a POM formulation against the metal worm to reduce sliding friction and mesh noise. Wide tooth contact distributes load across the face. The bore connection, including a set-screw option, fixes the wheel to the output shaft.
Specified Back-Driving Resistance
Required reverse torque determines the lead angle, worm thread count, tooth geometry, material pair, and surface finish. The target is defined as a measurable back-driving torque; self-locking is not assumed for every worm drive.
Technical Data Table
|
Parameter |
Value |
|
Tooth Angle |
20 degrees |
|
Outer Diameter |
40 mm |
|
Hub Length |
45 mm |
|
Center Hole |
10 mm with keyway |
|
Material |
POM with glass fiber |
Customization Capabilities
The wheel is matched to the actual worm rather than specified as a standalone gear. Ratio and reverse-torque target set the thread relationship and working center distance.
The output connection can use a keyed, D-shaped, or insert-supported bore. Resin and lubrication are selected together with the worm surface and duty cycle.
Quality Control
For first-piece approval, the wheel is mounted against the approved worm to check contact across the intended working face. Bore position is measured from the same assembly datum.
Final pair testing measures running torque, controlled backlash, and the required resistance to back-driving at the specified load.
FAQ
Q: What is the minimum order quantity?
A: The standard MOQ is 10,000 pieces. Different approved models or colors may be combined within the same order.
Q: Can samples be provided?
A: Yes. A sample can be provided before production. Custom sample development normally takes about 50 days after the worm and wheel data are confirmed.
Q: Can the wheel be used with an existing worm screw?
A: Yes. A drawing or physical sample of the worm is required to match the module, lead, thread count, pressure angle, center distance, and contact pattern.
Q: Can the worm wheel operate without grease?
A: POM-to-steel pairs can be designed for dry or lightly lubricated service at defined loads and speeds. Duty cycle, temperature, reverse torque, and wear testing establish the approved condition.
Hot Tags: plastic worm wheel, China plastic worm wheel manufacturers, suppliers, factory, controlled motion gear plastic, gear profile molded plastic, headlight adjustment gear, Plastic Gear Shaft, Plastic Reduction Gear, smooth motion plastic gear
