Worm Gear Set
Brand: Hansheng
Accuracy grade: ISO/DIN/GB level 5
Gear module: 0.1–5.0
Tip diameter: 3 mm–300 mm
Introduction
Hansheng Automation supplies fully matched worm gear set manufactured — worm and worm wheel cut to the same module, helix angle, and center distance tolerance.
Technical specifications
| Parameter | Specification |
| Gear set configuration | Single-start or multi-start worm + matched worm wheel |
| Gear ratio range | 5:1 — 100:1 standard; higher ratios available on request |
| Module range (metric) | 0.1 — 5.0 (specializing in micro-modules from 0.1) |
| Tip diameter (OD) | Ø3 mm — Ø300 mm |
| Precision grade | ISO / DIN / GB Level 5–9 (depends on manufacturing process) |
| Center distance tolerance | ±0.01 mm (Grade 5 matched sets) |
| Tooth contact ratio | ≥ 50 % standard; ≥ 70 % available for high-load applications |
| Lead angle (worm) | 3 ° — 30 ° (self-locking condition: lead angle < 6 °) |
| Backlash (Grade 5) | < 3 arc-minutes on request |
| Standard compliance | ISO, DIN, GB; AGMA-compatible on request |
| Surface finish | Ra ≤ 0.8 μm (ground finish, Grade 5 worm shaft) |
How we manufacture matched worm gear sets
We produce every Hansheng worm gear set as a matched pair on a synchronized manufacturing line.
Worm Shaft – Precision Thread Whirling
For the driving element (Worm Shaft), we utilize high-speed CNC Thread Whirling as our primary manufacturing process.
We achieve ISO/DIN Grade 6 accuracy with an excellent surface finish, and we use thread grinding to meet Grade 5 requirements. Additionally, we optimize these components for modules from 0.1 to 5.0, and we fully customize shaft lengths to match your specific drawings.
Worm Wheel – Dedicated Gear Hobbing
We manufacture the mating worm wheel using custom-matched gear hobs or fly-cutting techniques.
Recommended Material Combinations
The service life of a worm gear set is determined by the selection of suitable materials. As a general rule, the worm shaft should have higher hardness than the worm wheel. Below are our recommended material pairings.
| Worm material | Worm wheel material |
| 20CrMnTi carburized (HRC 58–62) | Phosphor bronze ZCuSn10Pb1 |
| 45# steel, induction hardened | Aluminum bronze ZCuAl10Fe3 |
| 304 / 316 stainless steel | Stainless steel worm wheel or nylon PA66 |
| Hardened alloy steel | Nylon PA66 / POM acetal |
Custom material pairings — including PEEK for high-temperature medical applications, aluminum bronze with Ni-P plating for salt-fog marine duty, and POM worm wheels for ultra-quiet instrument drives — are available subject to engineering review. Minimum order: 5 sets.
Worm gear set applications
Industrial robot
high-precision joint drive, backlash < 3 arc-min
Food filling machine
304 stainless steel worm + nylon worm wheel, lubrication-free
Medical bed
quiet POM worm wheel, noise < 55 dB
Packaging machinery
aluminum bronze worm wheel, long-term continuous operation
FAQ
A matched worm gear set from Hansheng includes one worm shaft and one worm wheel.
Standard ratios range from 5:1 up to 100:1 in a single stage. The ratio is a direct function of the worm wheel tooth count divided by the number of worm starts.
No. Self locking depends solely on the worm’s lead angle relative to the equivalent friction angle.
Self locking condition: Lead angle < friction angle.
For bronze on steel with standard lubrication, a lead angle below ~6° ensures self locking; above ~6°, back driving is possible and a brake is required.
Phosphor bronze (ZCuSn10Pb1) exhibits a friction coefficient approximately 30% lower than that of aluminum bronze, making it suitable for high-speed (input > 1000 rpm) and heavy-load applications. Aluminum bronze (ZCuAl10Fe3) delivers higher load capacity at a lower material cost, making it ideal for general automation, conveyor, and packaging applications.
Yes. Submit your 2D DXF/DWG or 3D STEP file through our inquiry form, along with the module, number of teeth, material, precision grade, and quantity. We will return a DFM (Design for Manufacturability) review and a formal quotation within 24 hours on business days.
The minimum order quantity for custom worm gear sets is 5 sets, whether for standard modules, non-standard modules (e.g., 0.3 mm or 6 mm), or special processes such as carburizing and quenching or Ni-P plating. Sample and prototype lead time is 1–2 weeks from drawing approval.
