Overview
Motovario B163 21.94:1 bevel gearbox with a 100mm hollow bore output and 160B5 IEC motor input, built for efficient 90° power transmission in industrial drive systems where a compact right-angle layout and dependable mechanical performance are required.
Engineered for continuous-duty operation, this configuration provides reliable speed reduction, smooth torque transfer, and strong shaft engagement across demanding OEM, processing, and plant machinery applications.
Medium Reduction: Provides a balanced combination of output speed reduction and torque multiplication, making it well suited to conveyors, packaging systems, mixers, processing equipment, and general industrial automation.
With its 100mm hollow output bore, this gearbox is designed to accommodate larger driven shafts, helping deliver a stable connection and dependable power transmission in heavier-duty mechanical assemblies.
The 160B5 IEC motor input allows straightforward pairing with larger IEC motors, giving this version greater input-side capacity and wider motor compatibility while maintaining the robust, space-efficient format expected from the Motovario B Series bevel helical gearbox range.
Key Specifications
Regulations: No
Bevel Helical: PAM B
Size: 163
Housing Version: U-Universal
Output Shaft Version: C-Hollow Shaft
Ratio (i): 21.94
Input Dim: Ø350 x 42 (IEC160 B5)
Output Shaft Dim: Ø100
Rotation Direction: Standard
ON-Oil Plugs: Breather-Drain-Level (Standard)
Mounting Position: B3
ON-Output Oil Seal: NBR-Nitrile
ON-Input Oil Seal: NBR-Nitrile
ON-Output Bearings: Taper Roller Bearings
ON-Lubrication: Without Oil
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 | ~64 rpm |
| 2-Pole | 2800 | ~128 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.
Motor Input Chart (IEC Flange Details)
This gearbox is supplied with a 160B5 IEC motor input. Confirm flange compatibility below:
| Motor Input | IEC Standard | Input Dimensions |
|---|---|---|
| 160B5 | IEC 60072 / IEC 60034 (B5 flange) | Ø350 x 42 |
If you’re unsure whether your motor is B5 or B14, contact our technical team and we’ll confirm compatibility.
Internal Links & Compatible Options
Same ratio, different motor input: jump to the B163 21.94:1 variant you need with a 100mm bore.
Need a different ratio? Explore the closest B163 100mm bore ratios to this version.
More B163 options: Browse all Motovario B163 gearbox ratios
Explore the full B Series range: Motovario B Series bevel gearboxes
Helpful calculators: Gearbox Ratio & Speed Calculator | Output Torque Calculator
FAQ
Is 21.94:1 a good ratio for balanced speed and torque applications?
Yes — a 21.94:1 ratio is typically selected when you need a more balanced combination of output speed reduction and torque multiplication. It is a strong fit for driven systems that need dependable running speed together with a more noticeable increase in usable output torque.
Can this gearbox be used with inverter-controlled motors?
Yes — this gearbox can be used with a VFD-controlled motor setup for improved speed control and smoother acceleration. For low-speed or high-load duty, make sure the motor is suitable for inverter operation and that cooling and service factor requirements are properly checked.
Configuration Notes
Input flange note: the 160B5 IEC input is intended for larger motor frame pairings, making this configuration suitable for applications that need higher input capacity and dependable power transmission in a compact right-angle gearbox arrangement.
Output bore note: the 100mm hollow bore is designed for larger shaft-driven systems where secure fitment, stable torque transfer, and long-term mechanical reliability are important.
Application example: ideal for conveyors, mixers, packaging lines, process machinery, and material handling systems where a larger shaft output, robust right-angle drive layout, and a balanced combination of output speed and torque are needed for efficient industrial operation.
Need help selecting the correct ratio, bore size, or motor input?
Contact our gearbox specialists for sizing support, torque checks, and availability confirmation.
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