Motovario BA72 8.36:1 Bevel Gearbox – 35mm Bore, 80B14

Overview

Motovario BA72 8.36:1 bevel gearbox with a 35mm hollow bore output and 80B14 IEC motor input, designed for compact 90° right-angle power transmission in industrial machinery and OEM drive systems.

Low reduction ratio: With an 8.36:1 reduction, this version is suited to applications that need a relatively fast output speed together with dependable torque multiplication. It is a strong choice for conveyors, transfer systems, packaging equipment, and other machinery where responsive drive performance and steady running under load are both important.

This configuration combines the compact footprint of an 80B14 motor input with a larger 35mm hollow output bore. That makes it especially useful for retrofit work, OEM machine builds, and applications where a larger shaft interface is needed without moving up to a bigger gearbox size.

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.

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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

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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: Ø120×19 (IEC 80 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.

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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	~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.

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Motor Input Chart (IEC Flange Details)

This gearbox is supplied with an 80B14 IEC motor input. Confirm flange compatibility below:

Motor Input	IEC Standard	Input Dimensions
80B14	IEC 60072 / IEC 60034 (B14 flange)	Ø120 × 19

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 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

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Ratio Selection Tips

Best for: higher-speed duties where you still want useful torque multiplication — ideal for light conveyors, packaging machinery, transfer systems, and compact automation drives.

Selection tip: low ratios suit responsive motion and faster output speeds — check the driven load carefully if the application needs slow shaft speed or maximum torque multiplication.

FAQ

Will this ratio be too fast for my application?
This 8.36:1 ratio is one of the faster BA72 options. If your application needs very slow output speed or maximum torque multiplication, a mid or high reduction ratio may be more suitable.

Can I run this with a VFD?
Yes — a VFD is a strong option for fine speed control. Keep an eye on motor cooling if you reduce frequency heavily for long periods.

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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.