Overview
Motovario BA42 33.78:1 bevel gearbox with a 20mm hollow bore output and 71B14 IEC motor input, suited to compact right-angle drive layouts where a face-mounted motor input and balanced output speed are important for OEM machinery and automation systems.
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.
Medium Reduction: This upper medium reduction ratio sits toward the higher end of the medium range, giving slower and more controlled output speed together with a useful torque increase for handling systems, packaging lines, and industrial 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 71B14 IEC motor input, this version is intended for face-mounted motor arrangements where compact packaging and neat machine-side installation are important. As part of the Motovario BA Series bevel gearbox platform, it offers a modular solution for space-conscious industrial applications.
Key Specifications
Regulations: No
Bevel Helical: PAM B
Size: A42
Housing Version: U-Universal
Output Shaft Version: C-Hollow Shaft
Ratio (i): 33,78
Input Dim: Ø105×14 (IEC 71 B14)
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 | ~41 rpm |
| 2-Pole | 2800 | ~83 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 71B14 IEC motor input. Confirm compatibility below:
| Motor Input | IEC Standard | Input Dimensions |
|---|---|---|
| 71B14 | IEC B14 | Ø105×14 |
Internal Links & Compatible Options
Same ratio, different motor input: jump to the BA42 33.78:1 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 33.78:1 reduction ratio?
A 33.78:1 ratio works well where machinery needs a more controlled shaft speed but still falls short of true high-reduction territory, making it a practical bridge between general-purpose and slower-running applications.
What applications is this configuration suited to?
This gearbox is a strong fit for compact transfer systems, smaller packaging stations, face-mounted machine drives, and OEM equipment where a 20mm hollow bore and 71B14 motor input are required.
Configuration Notes
Input flange note: the 71B14 IEC motor input is designed for face-mounted motor arrangements where compact packaging and neat machine-side installation are important, 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 slower conveyors, packaging machinery, transfer stations, and compact industrial equipment where stronger medium-range 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.
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