Overview
Motovario BA72 14.91:1 bevel gearbox with a 35mm hollow bore output and 100-112B5 IEC motor input, designed for compact 90° right-angle power transmission in industrial machinery and OEM drive systems.
Low reduction ratio: The 14.91:1 ratio remains in the low reduction group, giving useful torque multiplication while still maintaining a comparatively fast output speed for many industrial conveyor and transfer duties.
This configuration combines the 100-112B5 motor interface with the standard 35mm hollow output bore, making it especially useful for retrofit work, OEM machine builds, and applications where a dependable standard shaft interface is preferred.
Built for reliable industrial service, the BA72 uses efficient bevel helical gearing to deliver smooth power transmission, consistent output speed, and dependable long-term performance in continuous-duty environments.
Need the non-standard 30mm bore option?
If your application requires the non-standard 30mm output bore instead of this standard 35mm version, we can supply that configuration as well. View available BA72 options and request the non-standard bore version here: Motovario BA72 Gearbox.
Key Specifications
Regulations: No
Bevel Helical: PAM B
Size: A72
Housing Version: U-Universal
Output Shaft Version: C-Hollow Shaft
Ratio (i): 14.91:1
Input Dim: Ø250×28 (IEC 100-112 B5)
Output Shaft Dim: Ø35
Rotation Direction: Standard
ON-Oil Plugs: No Plugs (Standard)
Mounting Position: U
ON-Output Oil Seal: NBR-Nitrile
ON-Input Oil Seal: NBR-Nitrile
ON-Output Bearings: Ball Bearings
ON-Lubrication: Mineral SAE 85W-140
Paint: Ral 5010 Blue
Designed to IEC mounting and interface standards, this gearbox offers straightforward compatibility with IEC frame motors and dependable performance in direct-on-line or VFD-controlled drive systems.
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 | ~94 rpm |
| 2-Pole | 2800 | ~188 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 100-112B5 IEC motor input. Confirm flange compatibility below:
| Motor Input | IEC Standard | Input Dimensions |
|---|---|---|
| 100-112B5 | IEC 60072 / IEC 60034 (B5 flange) | Ø250 × 28 |
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 BA72 14.91:1 variant you need (35mm bore).
Need a different ratio? Explore the closest BA72 35mm ratios around this version.
More BA72 options: Browse all Motovario BA72 gearbox ratios
Explore the full BA Series range: Motovario BA Series bevel gearboxes
Helpful calculators:
Gearbox Ratio & Speed Calculator |
Output Torque Calculator
Ratio Selection Tips
Best for: faster-running conveyors, handling systems, and OEM machinery that need modest extra torque without moving into slower mid-range reductions.
Selection tip: pick 14.91:1 if you want the quickest end of the next step up in reduction, giving more torque than 12.44:1 while still avoiding the slower feel of higher ratios.
FAQ
Will this ratio be too fast for my application?
This is still a low reduction BA72 ratio, but it is slower than 8.36:1, 10.06:1, and 12.44:1. It works well when you want to keep a reasonably quick output speed while gaining a bit more torque multiplication.
Can I run this with a VFD?
Yes — a VFD can be used with 14.91:1 for variable-speed control and smoother startup. It is a practical choice where the process occasionally needs slower running without changing the gearbox selection.
Configuration Notes
- Input flange note: the 100-112B5 motor input allows direct flange mounting for larger IEC motors where a more substantial B5 interface is preferred.
- Output bore note: this build uses the standard 35mm bore. A 30mm BA72 bore is available as a non-standard option if a smaller shaft size is required.
- Application example: main conveyor drives, process machinery, and OEM equipment where a larger direct-mount motor needs to be paired with a relatively fast right-angle gearbox ratio.
Typical Applications
- Conveyor and transfer drive systems
- Packaging and process handling equipment
- Automated production and assembly lines
- Light materials handling equipment
- Rotary equipment and general machinery drives
- OEM machine and equipment builds
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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