Overview
Motovario BA72 8.36:1 bevel gearbox with a 35mm hollow bore output and 80B5 IEC motor input, arranged for compact 90° right-angle power transmission in conveyors, light handling systems, and OEM machinery.
Low reduction ratio: With an 8.36:1 reduction, this version is ideal where you want a relatively fast output speed together with dependable torque gain. It suits responsive conveyor sections, light packaging duties, and compact transfer applications where steady running matters.
This version combines a direct-mount 80B5 motor interface with a larger 35mm hollow output bore, giving you a useful non-standard option when the non-non-standard 30mm BA72 bore is preferred for the driven shaft.
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 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: Ø200×19 (IEC 80 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 | ~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 80B5 IEC motor input. Confirm flange compatibility below:
| Motor Input | IEC Standard | Input Dimensions |
|---|---|---|
| 80B5 | IEC 60072 / IEC 60034 (B5 flange) | Ø200 × 19 |
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: responsive conveying, compact packaging systems, and lighter transfer duties where higher shaft speed is still important.
Selection tip: choose this version when you need quicker output speed and a direct B5 motor arrangement, but still want more torque than a near-direct drive setup would provide.
FAQ
Will this ratio be too fast for my application?
This is one of the faster BA72 ratios, so it works best where you want brisk output speed rather than maximum reduction. For slower-running machinery, moving up to a mid or high ratio is usually the better choice.
Can I run this with a VFD?
Yes — this gearbox works well with inverter-driven motors where speed trimming is needed. As with any VFD setup, check motor cooling if you plan to run at very low frequency for extended periods.
Configuration Notes
- Input flange note: the 80B5 motor input gives a compact direct flange arrangement for smaller IEC motors where installation space is limited.
- Output bore note: this version uses the standard 35mm bore. A 30mm bore is available as a non-standard option, so confirm shaft diameter before ordering.
- Application example: infeed conveyors, small transfer systems, and compact production machinery where fast response and tidy B5 motor mounting are both needed.
Typical Applications
- Conveyor infeed and outfeed sections
- Compact packaging and labelling equipment
- Small materials handling systems
- Transfer stations and indexing equipment
- Light process machinery
- OEM machine builds 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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