Overview
Built with an 80B5 motor input, this BA72 gearbox delivers compact right-angle transmission through the standard 35mm hollow bore, giving a straightforward option for shaft-mounted driven equipment.
Reduction profile: With a 45.64:1 ratio, this version moves further into high reduction territory, helping create steadier low-speed output and stronger torque multiplication across demanding machine cycles.
That makes it a strong option for transfer systems, process lines, packaging equipment, and plant machinery where improved control at reduced speed is important.
The B5 flange format is often preferred where direct motor mounting is part of the machine design, helping create a neat, familiar drive package for new builds and replacements.
Its bevel-helical construction supports stable torque transfer, good running characteristics, and the long service life expected from industrial geared drives.
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): 45.64:1
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 | ~31 rpm |
| 2-Pole | 2800 | ~61 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 45.64:1 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: loaded conveyors, handling machinery, and steady-running industrial equipment where stronger torque output is important.
Selection tip: use 45.64:1 when you need more torque than 40.87:1 provides but still want a practical all-round high reduction BA72 option.
FAQ
Will this ratio be too slow for my application?
45.64:1 is aimed at slower-running machinery and is typically chosen where stronger torque output matters more than maintaining a higher shaft speed.
Can I run this with a VFD?
Yes — pairing 45.64:1 with a VFD gives good flexibility for startup, speed trimming, and process optimisation on heavier-duty machinery.
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 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 conveyor drives, transfer systems, and packaging equipment where direct B5 mounting is preferred.
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.
Reviews
There are no reviews yet.