®Modular Industrial Geared Motors · CHENGFA
S Series Helical-Worm Geared Motor
Compatible with SEW S, Bonfiglioli VF & Rossi RV
Combined helical-worm geared motor series offering high ratios in a compact right-angle package.
Overview
Combined helical-worm geared motor series offering high ratios in a compact right-angle package. The series is engineered for modular industrial geared motors applications and can be configured for standard or customized delivery based on operating parameters.
Key features
- Modular construction with multiple mounting options
- Hardened-tooth gearing (per series)
- Multiple input and output configurations
- Motor matching available per application
- OEM nameplate on confirmed scope
- Non-standard configuration subject to technical review
Why this series
The CHINFAR S Series Helical-Worm Gear Unit is intended for compact right-angle drives in small and medium power applications. The series is organized around standardized size, ratio, motor-interface and mounting combinations so that engineers can move from a machine requirement to a configuration rather than selecting by model name alone.
| Item | S Series |
|---|---|
| Gear unit type | Helical-Worm Gear Unit |
| Shaft arrangement | Right Angle |
| Size range | S37–S97 |
| Reference power range | 0.12–22 kW |
| Reference ratio range | 7.75–307.88 |
| Reference maximum torque range | 92–4000 Nm |
Engineering note: published ranges describe the cleaned reference envelope of the series. The final selectable power, ratio, torque, motor interface and mounting arrangement depend on the exact configuration.
Where the S Series fits
The S Series is typically considered when the machine requires a right-angle arrangement. Common application categories include light and medium conveyors, packaging machinery, food and process equipment, general automation, and compact right-angle machinery. Final selection should always be based on duty, ratio, torque, mounting position, shaft/interface requirements and service factor.
Key design characteristics
- Compact right-angle arrangement
- Wide ratio range
- Multiple hollow-shaft and flange configurations
- Suitable for many small and medium power drives
The S Series is generally not the first choice when the duty requires the highest torque range available from the four-series platform. In those cases, compare the R, F, K and S architectures before fixing the gearbox family.
Available configuration families
- S — Basic Helical-Worm
- SA — Hollow Shaft
- SF — Output Flange
- SAF — Hollow Shaft + Flange
- SAZ/SAT/SH/SHF/SHZ/SHT — Extended Variants
Different variants can share a size designation while using different output interfaces. For replacement work, the complete configuration code and installation drawing are more important than the base size alone.
How to select a S Series gear unit
- Confirm motor or input power and actual input speed.
- Define the target output speed or required transmission ratio.
- Calculate the required output torque and apply the duty/service factor.
- Select the shaft arrangement and mounting configuration.
- Confirm the motor frame and input interface.
- Check radial/axial loads where the driven machine imposes external shaft loads.
- For replacement projects, verify mounting dimensions against the existing gearbox drawing before declaring direct replacement.
Technical resources
- S Series specifications
- S Series selection guide
- S Series mounting and installation
- S Series lubrication and maintenance
- S Series frequently asked questions
Data quality and engineering use
CHINFAR maintains structured performance and interface data for this series. Detailed selection rows combine power, motor pole count, ratio, output speed, output torque and service factor. Installation dimensions should be re-checked against the target machine or existing gearbox whenever a direct replacement claim is required.
Why Choose Our S Series?
When compared with traditional worm gearboxes, our S Series helical series delivers superior efficiency, longer service life, and better reliability.
Compared with Traditional Worm Gearbox
| Parameter | S Series | Traditional Worm |
|---|---|---|
| Efficiency | 95–98% | 40–70% |
| Service Life | 15–20 years | 5–10 years |
| Power Density | High | Low |
| Back-driving | Requires brake | Self-locking (limited) |
| Noise Level | Lower (~65 dB) | Higher (~75 dB) |
Data based on CHENGFA engineering records. Actual performance may vary with operating conditions.
Mounting Position & Selection Guide
Installation Positions
Fill Level Reference
| Pos. | Fill |
|---|---|
| M1 | ! Check |
| M2 | ✓ Standard |
| M3 | ✓ Standard |
| M4 | ✓ Standard |
| M5 | ✓ Standard |
| M6 | ✓ Standard |
Specific oil quantities per model available on request.
Technical specifications
| Power Range | 0.12 – 22 kW |
|---|---|
| Ratio Range | 7.50 – 330 (single-stage); up to 33,100 with combinations |
| Rated Torque | 11 – 26,000 N·m |
| Service Factor | Service factor 0.80 – 3.20 · Efficiency up to 90% |
Full selection tables are available on request.
Typical applications
- Conveyors
- Packaging lines
- Gate and flap drives
Related series
Technical resources
Product gallery
S Series — FAQ
Is your series interchangeable with SEW, Bonfiglioli or Dodge?
What is the typical delivery time for standard and custom configurations?
Do you support OEM nameplates, colors, packaging and shaft modifications?
What is the safe inspection sequence when a geared motor overheats?
What should be checked during the first run of a new gearbox installation?
What data should I provide when requesting a quote for an extruder gearbox?
What is the warranty period and what does it cover?
What replacement data should I send when retrofitting an existing gearbox?
Don't have clear photos or drawings? No worries. Just tell us your application, power range, and ratio — we'll handle the rest.
Need selection support for this series?
Provide the application, motor power, input speed, required output speed, torque, mounting arrangement and quantity — we will review and recommend a suitable configuration.
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