Part Size: 1-150 mm
Weight: 0.1-300 g
Tolerance: ±0.3%
Surface Finish: Ra 0.8–1.6 um
Materials: SS316L, 17-4PH, SS420, Ti Alloy etc
Density: ≥96–99% Wrought
Secondary Operations: CNC, Polishing, Laser Marking
Industry Expertise
Factory Price
OEM/ODM Services
Powder Metal Worm Gears are precision transmission components designed for compact systems requiring high reduction ratios and self-locking capability.
A worm gear is a type of mechanical gear system consisting of a worm (screw-like shaft) and a worm wheel (gear). When the worm rotates, it turns the worm wheel to transmit motion and torque at a right angle. This setup is ideal for high reduction ratios and precise, quiet operation.
The worm meshes with the teeth of the worm wheel, typically at a 90-degree angle. As the worm turns, it gradually pushes the teeth of the wheel, resulting in smooth and controlled motion.

Powder Metallurgy enables:
Complex helical geometries
High-volume production
Cost-effective manufacturing
Available Materials:
17-4PH Stainless Steel
Low Alloy Steel
Copper Alloys
Powder Metallurgy is particularly suitable for medium-complexity gears and high-volume production where cost efficiency is critical.
For highly intricate geometries such as miniature gears, multi-level gear systems, internal undercuts, thin-wall structures, and integrated transmission components, Metal Injection Molding (MIM) may provide a more suitable manufacturing solution.
This complementary manufacturing capability allows us to provide both Powder Metallurgy and Metal Injection Molding solutions according to customer performance and cost requirements.
| Geometry Features | PM | MIM |
| Small module geas(<0.5) | Limited | Excellent |
| Internal undercuts | Difficult | Excellent |
| Multi-level gears | Limited | Excellent |
| Thin wall structures(<0.5mm) | Difficult | Excellent |
| Cross holes | Limited | Excellent |
| Miniature gears(<10mm OD) | Difficult | Excellent |
| Integrated assemblies | Limited | Excellent |
| Helical internal gears | Very diffcult | Excellent |
| Complex planetary gears | Limited | Excellent |
For miniature gears, multi-level gears, integrated transmission components, and highly intricate designs, please also explore our Metal Injection Molding Gear Solutions.
FAQ:
Why choose PM worm gears?
PM technology allows economical manufacturing of worm gears with stable performance.
What is the difference between Powder Metal gears and MIM gears?
Powder Metallurgy gears are generally preferred for medium and large production volumes of simple to moderately complex transmission components due to their excellent cost efficiency and larger size capability.
Metal Injection Molding gears are more suitable for miniature and highly complex components requiring intricate geometries, thin walls, undercuts, or integrated functional features.
By offering both technologies, we can recommend the most suitable manufacturing process based on component geometry, performance requirements, production volume, and target cost.
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