Overview
Motovario BA42 12.95:1 bevel gearbox with a 20mm hollow bore output and 71B5 IEC motor input, designed for smaller machines that need neat 90° drive transfer without giving up installation flexibility.
This version is well suited to B5 flange motor assemblies, compact handling equipment, and space-conscious production machines. It is designed to give reliable right-angle transmission in compact layouts where motor position, shaft access, and mounting space all matter.
Low Reduction: At 12.95:1, this configuration still sits in the faster end of the low-reduction range, giving a sensible balance between speed retention and extra turning force. In practical terms, that makes it works well on shorter conveyors, feeders, compact packaging equipment, and small automation modules.
Its 20mm hollow bore output suits smaller driven shafts and supports tidy mechanical integration in space-conscious machine layouts.
The 71B5 IEC motor input suits applications that need a B5 flange motor connection while keeping the gearbox package compact and straightforward to install. Being part of the Motovario BA Series platform, it offers a proven modular solution for smaller industrial machines and replacement drive builds.
Key Specifications
Regulations: No
Bevel Helical: PAM B
Size: A42
Housing Version: U-Universal
Output Shaft Version: C-Hollow Shaft
Ratio (i): 12,95
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 | ~108 rpm |
| 2-Pole | 2800 | ~216 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 12.95:1 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 select a 12.95:1 gearbox ratio?
A 12.95:1 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.
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