Overview
Motovario BA72 12.44:1 bevel gearbox with a 35mm hollow bore output and 90B14 IEC motor input, designed for compact 90° right-angle power transmission in industrial machinery and OEM drive systems.
Low reduction ratio: At 12.44:1, this version still offers higher output speed than mid-range ratios while giving a bit more torque multiplication, making it a strong all-round option for conveyors, process handling, and packaging systems.
This configuration combines the 90B14 compact flange input 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): 12.44:1
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 | ~113 rpm |
| 2-Pole | 2800 | ~225 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 12.44:1 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: balanced high-speed conveying, handling systems, and compact automation equipment where a little extra reduction is useful.
Selection tip: use 12.44:1 when 8.36:1 or 10.06:1 feels a little too fast but you still want a relatively lively output speed rather than a heavy reduction setup.
FAQ
Will this ratio be too fast for my application?
12.44:1 still sits in the lower reduction part of the BA72 range, so it is usually chosen where good output speed is important. If the driven machine needs slower motion or more torque reserve, consider stepping up further in ratio.
Can I run this with a VFD?
Yes — 12.44:1 works well with a VFD where process speed needs to be adjusted. It is a useful combination for conveyors and packaging machines that benefit from gentle speed trimming without changing the gearbox ratio.
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
- 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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