Motovario BA52 7.91:1 Bevel Gearbox – 25mm Bore, 80B5

Overview

Motovario BA52 7.91:1 bevel gearbox with a 25mm hollow bore output and 80B5 IEC motor input, built for compact right-angle power transmission in smaller industrial machines, conveyor assemblies, and OEM drive systems.

This configuration is a practical choice for compact machinery that needs a larger motor input than smaller frame options while still keeping the overall gearbox assembly neat and space-efficient. It gives machine builders and maintenance teams a reliable way to introduce 90° drive transmission without moving to a bulkier geared solution.

Low Reduction: At 7.91:1, this version keeps output speed relatively high while still delivering a useful torque increase. That makes it a strong fit for faster-running compact conveyors, indexing applications, packaging machinery, and light transfer equipment where controlled speed reduction is needed without sacrificing responsiveness.

The 25mm hollow bore output provides a straightforward shaft-mounted arrangement for smaller driven shafts, helping to simplify installation while maintaining dependable torque transfer in everyday industrial service.

The 80B5 IEC motor input is suited to applications needing a larger B5 flange motor connection, giving broader motor compatibility and a more substantial input-side arrangement for compact machinery builds. As part of the Motovario BA Series platform, it offers a modular and proven gearbox solution for OEM equipment, replacement builds, and general industrial drive duties.

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Key Specifications

Regulations: No
Bevel Helical: PAM B
Size: A52
Housing Version: U-Universal
Output Shaft Version: C-Hollow Shaft
Ratio (i): 7,91
Input Dim: Ø200×19 (IEC 80 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

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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	~177 rpm
2-Pole	2800	~354 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.

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Motor Input Chart (IEC Flange Details)

This gearbox is supplied with a 80B5 IEC motor input. Confirm compatibility below:

Motor Input	IEC Standard	Input Dimensions
80B5	IEC B5	19 x 200

If you’re unsure whether your motor is B5 or B14, contact our technical team for compatibility confirmation.

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Internal Links & Compatible Options

Same ratio, different motor input: jump to the BA52 7.91:1 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

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FAQ

Why choose a 7.91:1 reduction ratio?
A 7.91:1 ratio is a strong option when equipment needs comparatively high output speed together with a practical torque increase. It suits machinery that benefits from modest speed reduction without stepping into medium or high reduction ranges.

What applications is this configuration suited to?
This gearbox is well suited to compact conveyors, packaging machinery, transfer drives, indexing systems, and OEM equipment where a 25mm hollow bore and 80B5 motor input are required.

Configuration Notes

Input flange note: the 80B5 IEC motor input uses a larger B5 flange arrangement with a 19 x 200 input dimension, making it suitable for applications that need a more substantial motor connection while still keeping a compact right-angle gearbox format.

Output bore note: the 25mm hollow bore is designed for smaller driven shafts, providing secure shaft engagement and dependable torque transmission in lighter-duty and general industrial applications.

Application example: a good fit for smaller conveyors, compact transfer systems, packaging equipment, and OEM machinery where a right-angle gearbox with relatively fast output speed and an 80B5 motor input is needed.

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Need help selecting the correct ratio, bore size, or motor input?
Contact our gearbox specialists for sizing assistance, torque verification, and availability confirmation.