Overview
Motovario BA52 11.57:1 bevel gearbox with a 25mm hollow bore output and 71B5 IEC motor input, arranged for compact right-angle power transmission in smaller industrial and OEM drive assemblies.
This configuration is a strong fit for compact machinery, lighter-duty conveyors, and general OEM drive packages where a direct motor-to-gearbox connection is preferred. It gives machine builders and maintenance teams a neat way to introduce 90° power transmission without stepping up to a larger gearbox size than the application needs.
Low Reduction: At 11.57:1, this setup keeps output speed comparatively high while still providing a useful torque increase. In practical use, that makes it well suited to compact conveyors, indexing systems, small packaging machinery, and lighter transfer applications where quicker output speed is important.
The 25mm hollow bore output provides a simple shaft-mount arrangement for smaller driven components, helping to keep installation straightforward while maintaining reliable torque transfer.
The 71B5 IEC motor input is suited to compact motor pairings where a larger B5 flange format is preferred for direct mounting and straightforward gearbox-to-motor integration. As part of the Motovario BA Series platform, it provides a proven modular solution for compact industrial machinery and replacement drive builds.
Key Specifications
Regulations: No
Bevel Helical: PAM B
Size: A52
Housing Version: U-Universal
Output Shaft Version: C-Hollow Shaft
Ratio (i): 11,57
Input Dim: Ø160×14 (IEC 71 B5)
Output Shaft Dim: Ø25
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
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 | ~121 rpm |
| 2-Pole | 2800 | ~242 rpm |
Need torque confirmation? Output torque depends on motor power, gearbox efficiency, and service factor. Use our calculator tools or contact us for confirmed application data.
Motor Input Chart (IEC Flange Details)
This gearbox is supplied with a 71B5 IEC motor input. Confirm compatibility below:
| Motor Input | IEC Standard | Input Dimensions |
|---|---|---|
| 71B5 | IEC B5 | 14 x 160 |
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 BA52 11.57:1 variant you need with a 25mm bore.
Need a different ratio? Explore the closest BA52 25mm bore ratios to this version.
More BA52 options: Browse all Motovario BA52 gearbox ratios
Explore the full BA Series range: Motovario BA Series bevel gearboxes
Helpful calculators:
Gearbox Ratio & Speed Calculator |
Output Torque Calculator
FAQ
Why choose a 11.57:1 reduction ratio?
A 11.57:1 ratio is a good choice where machinery needs relatively high output speed together with a moderate torque increase. It suits applications that need controlled speed reduction without stepping into medium or high reduction territory.
What applications is this configuration suited to?
This gearbox is well suited to compact conveyors, light-duty processing systems, packaging equipment, transfer drives, and OEM machinery where a 25mm hollow bore and 71B5 motor input are required.
Configuration Notes
Input flange note: the 71B5 IEC motor input uses a larger B5 flange arrangement, making this gearbox suitable for compact drive assemblies where direct motor mounting and straightforward pairing are priorities.
Output bore note: the 25mm hollow bore is intended for smaller driven shafts, providing secure shaft engagement and dependable torque transfer in lighter-duty and general industrial applications.
Application example: well suited to smaller conveyors, transfer mechanisms, packaging systems, and automation equipment where a compact right-angle gearbox with relatively high output speed is needed.
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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