Overview
Motovario BA72 8.36:1 bevel gearbox with a 35mm hollow bore output and 90B14 IEC motor input, designed for compact right-angle drive integration in industrial equipment and OEM machinery.
Low reduction ratio: At 8.36:1, this model maintains a relatively quick output speed while still increasing available torque, making it well suited to transfer conveyors, packaging systems, and automation equipment that need responsive drive performance.
By combining a 90B14 compact flange input with a larger 35mm hollow output bore, this configuration gives you a useful alternative where the non-standard 30mm BA72 bore is preferred but a small-footprint B14 motor interface is preferred.
Its bevel helical gearing layout helps deliver smooth power transmission, stable running characteristics, and dependable service life across continuous-duty industrial applications.
Need the non-standard 30mm bore option?
If your application requires the standard 30mm output bore instead of this 30mm non-standard version, we can supply that configuration as well. View available BA72 options and request the 30mm 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): 8.36:1
Input Dim: Ø140×24 (IEC 90 B14)
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 | ~167 rpm |
| 2-Pole | 2800 | ~335 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 90B14 IEC motor input. Confirm flange compatibility below:
| Motor Input | IEC Standard | Input Dimensions |
|---|---|---|
| 90B14 | IEC 60072 / IEC 60034 (B14 flange) | Ø140 × 24 |
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 8.36:1 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: transfer conveyors, compact automation cells, and packaging machinery where you want quick output speed with a compact B14 motor interface.
Selection tip: a good choice when the driven equipment needs faster shaft speed, a larger 35mm output bore, and the shorter overall package of a B14 motor connection.
FAQ
Will this ratio be too fast for my application?
For many conveying and transfer duties this ratio is not too fast, but it can be if your machine needs very slow shaft speed or heavy torque multiplication. In those cases, a higher reduction BA72 would be more appropriate.
Can I run this with a VFD?
Yes — pairing this gearbox with a VFD is a practical way to fine-tune line speed and startup behaviour. Just make sure the motor remains adequately cooled if you run it slowly for long periods.
Configuration Notes
- Input flange note: the 90B14 motor input keeps the assembly compact while allowing pairing with IEC 90 frame B14 motors.
- 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: compact packaging machines, light assembly equipment, and transfer conveyors where a short motor-to-gearbox package is preferred.
Typical Applications
- Transfer conveyors and short line sections
- Packaging and wrapping machinery
- Compact automation stations
- Light-duty assembly equipment
- Indexing and positioning systems
- OEM machine upgrades and retrofits
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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