®Modular Industrial Geared Motors · CHENGFA
K Series Helical-Bevel Geared Motor
Compatible with SEW K, Bonfiglioli A & Rossi R series
Right-angle helical-bevel geared motor series for space-saving 90° drive layouts.
Overview
Right-angle helical-bevel geared motor series for space-saving 90° drive layouts. 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 K Series Helical-Bevel Gear Unit is intended for efficient right-angle drives with higher load requirements. 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 | K Series |
|---|---|
| Gear unit type | Helical-Bevel Gear Unit |
| Shaft arrangement | Right Angle |
| Size range | K37–K187 |
| Reference power range | 0.12–200 kW |
| Reference ratio range | 3.73–210.00 |
| Reference maximum torque range | 200–50000 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 K Series fits
The K Series is typically considered when the machine requires a right-angle arrangement. Common application categories include bulk material handling, heavy conveyors, mixers and agitators, process machinery, and industrial right-angle drives. Final selection should always be based on duty, ratio, torque, mounting position, shaft/interface requirements and service factor.
Key design characteristics
- Right-angle shaft arrangement
- Helical-bevel transmission layout
- Broad torque capability
- Solid-shaft, hollow-shaft and flange variants
The K Series is generally not the first choice when the application prioritizes a simpler inline layout or very compact moderate-power worm-based right-angle drive. In those cases, compare the R, F, K and S architectures before fixing the gearbox family.
Available configuration families
- K — Basic Helical-Bevel
- KA — Hollow Shaft
- KF — Output Flange
- KAF — Hollow Shaft + Flange
- KAZ/KAB/KH/KHF/KHZ/KHB/KAT/KHT — 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 K 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
- K Series specifications
- K Series selection guide
- K Series mounting and installation
- K Series lubrication and maintenance
- K 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 K Series?
When compared with traditional worm gearboxes, our K Series helical series delivers superior efficiency, longer service life, and better reliability.
Compared with Traditional Worm Gearbox
| Parameter | K 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 – 200 kW |
|---|---|
| Ratio Range | 5.36 – 320 (single-stage); up to 99,800 with combinations |
| Rated Torque | 31 – 62,800 N·m |
| Service Factor | Service factor 0.80 – 4.00 · Efficiency up to 97% |
Full selection tables are available on request.
Typical applications
- Agitators
- Conveying systems
- Pumps and dosing
- Mixers
Related series
Technical resources
Product gallery
K 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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