Overview
B123 9.62:1 bevel helical gearbox with a 60mm hollow bore output and 132B5 IEC motor input for compact 90° right-angle drive integration.
Designed for industrial reliability, this build provides stable output speed control and robust torque delivery in demanding environments.
Low reduction: The 9.62:1 reduction ratio keeps output speeds higher while still multiplying torque, making it ideal for faster conveyors, indexing systems, and applications needing responsive motion.
This configuration includes a 60mm hollow output bore and a 132B5 IEC motor input, providing dependable speed reduction and confident torque delivery for conveyors, automation lines, packaging machinery, and OEM equipment builds.
As part of the modular Motovario B123 bevel helical gearbox range, this unit supports flexible mounting positions, straightforward IEC motor compatibility, and proven long-term reliability for industrial service.
Need the non standard 55mm bore option?
If your application requires a different output bore size than the standard 60mm, we can often supply alternative configurations depending on availability. View the B123 range and request your required bore option here: Motovario B123 Gearbox.
Key Specifications
- Series: B Series – Bevel Helical Gearboxes
- Model: B123
- Reduction Ratio: 9.62:1
- Output Bore: 60mm Hollow Bore
- Motor Input: 132B5 IEC Flange
- Housing Material: High-strength cast iron
- Gear Type: Spiral bevel + hardened helical stage
- Mounting Positions: B3 Mount
- Duty Rating: Suitable for continuous industrial operation (S1)
Optimised internal oil paths support reliable lubrication across multiple mounting orientations and duty cycles.
Output Speed (4-Pole vs 2-Pole Motors)
Calculated nominal output speed using a standard IEC motor:
| Motor Type | Input Speed (rpm) | Estimated Output Speed (rpm) |
|---|---|---|
| 4-Pole | 1400 | ~146 rpm |
| 2-Pole | 2800 | ~291 rpm |
Need torque confirmation? Output torque depends on motor power (kW), gearbox efficiency, and service factor. Use our Gearbox Service Factor Calculator or contact us for verified torque figures.
Motor Input Chart (IEC Flange Details)
This gearbox is supplied with a 132B5 IEC motor input. Confirm flange compatibility below:
| Motor Input | IEC Standard | Input Dimensions |
|---|---|---|
| 132B5 | IEC 60072 / IEC 60034 (B5 flange) | Ø300 x 38 |
If you’re unsure whether your motor is B5 or B14, contact our technical team for compatibility confirmation.
Internal Links & Compatible Options
Same ratio, different motor input: jump to the B123 9.62:1 variant you need (60mm bore).
Need a different ratio? Explore the closest B123 60mm bore ratios above and below this version.
More B123 options: Browse all Motovario B123 gearbox ratios
Explore the full B Series range: Motovario B Series bevel gearboxes
Helpful calculators:
Gearbox Ratio & Speed Calculator |
Output Torque Calculator
Performance & Design Features
✔ Compact 90° right-angle bevel design for space-saving gearbox installations
✔ 9.62:1 reduction delivers reliable torque boost with smooth, predictable output speeds
✔ Precision-cut spiral bevel gears for quiet running and efficient power transmission
✔ Heavy-duty bearing arrangement designed to manage high radial and axial shaft loads
✔ Excellent choice for VFD-driven motors and variable-speed process control
✔ Robust cast iron housing engineered for OEM machinery and continuous industrial service
Ratio Selection Tips
- Best for: applications that need a quicker output speed with modest torque gain — such as faster conveyors, packaging infeed/outfeed, and indexing where responsiveness matters.
- Selection tip: low ratios suit responsive motion — check acceleration/inertia and ensure the driven equipment doesn’t require very slow output speed.
FAQ
Will this ratio be too fast for my application?
If you need very slow output speed, move up to a mid or high reduction ratio. Low ratios are best when you still want a relatively quick output with torque gain.
Can I run this with a VFD?
Yes — a VFD is ideal for fine speed control. Keep an eye on cooling at very low motor speeds if you reduce frequency for extended periods.
Configuration Notes
- Input flange note: the 132B5 IEC input is built for high-power motor pairings, delivering strong input torque capacity for demanding conveyors and process machinery.
- Output bore note: the 60mm hollow shaft bore suits larger shaft interfaces and heavier loading, providing a robust connection for high-torque transmission.
- Application example: fast conveyor infeed/outfeed where you want responsive line speed without sacrificing pulling force.
Typical Applications
- Belt and chain conveyor drives (incl. incline conveyors)
- Line-shaft conveyor sections and transfer stations
- Packaging machinery (cartoners, case packers, pallet conveyors)
- Automated assembly and indexing tables
- Food-grade conveyor and processing line drives (washdown-area compatible when specified)
- Materials handling: roller conveyors, sortation lines, and accumulation systems
Need help selecting the correct ratio, bore size, or motor input?
Contact our gearbox specialists for sizing assistance, torque verification, and availability confirmation.
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