Overview
Motovario BA42 57.43:1 bevel gearbox with a 20mm hollow bore output and 71B5 IEC motor input, built for compact machine assemblies and automation systems that need dependable right-angle reduction with a practical IEC flange input..
This configuration is well suited to applications that need efficient 90° drive transfer, dependable mechanical performance, and a compact gearbox layout for smaller machine builds and automation assemblies.
High Reduction: This central high reduction ratio provides a substantial speed decrease and stronger torque emphasis, making it a good fit for slower-transfer conveyors, feeders, indexing systems, and compact process machinery.
The 20mm hollow bore output provides a secure and practical fit for smaller driven shafts, helping ensure stable torque transmission and straightforward mechanical integration.
Equipped with a 71B5 IEC motor input, this version is a practical choice for compact motor pairings where straightforward flange mounting and dependable machine integration are required. As part of the Motovario BA Series bevel gearbox platform, it offers a compact modular solution for slower-speed industrial applications where dependable right-angle torque transfer is required.
Key Specifications
Regulations: No
Bevel Helical: PAM B
Size: A42
Housing Version: U-Universal
Output Shaft Version: C-Hollow Shaft
Ratio (i): 57,43
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 | ~24 rpm |
| 2-Pole | 2800 | ~49 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 | Ø160×14 |
Internal Links & Compatible Options
Same ratio, different motor input: jump to the BA42 57.43:1 variant you need with a 20mm bore.
Need a different ratio? Explore the closest BA42 20mm bore ratios to 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 choose a 57.43:1 reduction ratio?
A 57.43:1 ratio sits firmly in the high-reduction range, making it well suited to applications that need slower output speed, stronger torque multiplication, and steadier drive behaviour.
What applications is this configuration suited to?
This gearbox is a strong fit for compact handling equipment, B5-mounted machine drives, smaller conveyors, and OEM automation systems where a 20mm hollow bore and 71B5 motor input are required.
Configuration Notes
Input flange note: the 71B5 IEC motor input is designed for B5 flange motor pairings where a larger flange interface is preferred on compact industrial machines, making this gearbox suitable for compact drive assemblies where space efficiency and simple motor matching are important.
Output bore note: the 20mm 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 compact conveyors, packaging lines, transfer systems, and general automation equipment where a high reduction ratio with relatively lively output speed is preferred.
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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