Motovario BA42 7.62:1 Bevel Gearbox – 20mm Bore, 71B5

Overview

Motovario BA42 7.62:1 bevel gearbox with a 20mm hollow bore output and 71B5 IEC motor input, developed for compact right-angle drive systems used in OEM machinery and light-to-medium duty industrial automation.

This configuration offers a reliable solution where a slightly larger B5 flange motor connection is preferred while still maintaining a compact gearbox footprint. It supports stable power transmission and straightforward integration into conveyor systems, handling equipment, and production machinery.

Low Reduction: Provides a modest speed decrease while increasing available torque, making it suitable for applications where output speed must remain relatively high but improved load handling is required.

The 20mm hollow bore output allows quick and secure shaft mounting for smaller driven components, while the 71B5 IEC input flange supports direct coupling to compatible IEC motors. As part of the Motovario BA Series bevel gearbox range, it delivers a modular and dependable right-angle drive solution for compact industrial machines.

---

Key Specifications

Regulations: No
Bevel Helical: PAM B
Size: A42
Housing Version: U-Universal
Output Shaft Version: C-Hollow Shaft
Ratio (i): 7,62
Input Dim: Ø160×14 (IEC 71 B5)
Output Shaft Dim: Ø20
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	~184 rpm
2-Pole	2800	~367 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	Ø160 x 14

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 BA42 7.62:1 variant you need with a 20mm bore.

Need a different ratio? Explore the closest BA42 20mm bore ratios above this version.

More BA42 options: Browse all Motovario BA42 gearbox ratios

Explore the full BA Series range: Motovario BA Series bevel gearboxes

Helpful calculators:
Gearbox Ratio & Speed Calculator |
Output Torque Calculator

---

FAQ

Why select a 7.62:1 gearbox ratio?
A 7.62:1 ratio is often chosen when machinery requires a controlled reduction in speed while still maintaining fairly fast output rotation. It provides useful torque gain without dramatically lowering the final shaft speed.

When is the 71B5 motor input preferred?
The 71B5 IEC input is typically selected when a larger B5 flange motor connection is required. This style offers secure motor mounting and is widely used in industrial equipment where B5 flange motors are standard.

Configuration Notes

Input flange note: the 71B5 IEC motor input provides a flange-mounted motor connection commonly used in industrial automation systems where direct motor coupling and stable mounting are important.

Output bore note: the 20mm hollow bore supports smaller driven shafts and allows quick mechanical connection in compact drive assemblies.

Application example: suitable for automated handling systems, packaging lines, compact conveyor drives, and light industrial machinery where a dependable right-angle gearbox with moderate speed reduction is required.

---

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