Overview
Motovario B153 25.19:1 bevel gearbox with a 90mm hollow bore output and 200B5 IEC motor input, intended for right-angle speed reduction duties in industrial machinery and automated equipment.
Designed to support reliable day-to-day operation, it delivers efficient power transmission, consistent torque multiplication, and dependable service in demanding OEM and process environments.
Medium Reduction: A versatile reduction range that offers controlled output speeds with dependable torque transmission, commonly used across processing equipment, assembly lines, and automation systems.
Combining a 90mm hollow bore output with a 200B5 IEC motor input, this configuration supports stable shaft connection, efficient torque transfer, and versatile use across conveyors, production lines, and material handling machinery.
The 200B5 flange input allows compatibility with larger IEC motor frames, giving this gearbox broader motor pairing flexibility while maintaining a compact installation footprint and strong industrial performance.
As part of the proven Motovario B Series bevel helical gearbox platform, it benefits from modular construction, multiple mounting possibilities, and dependable continuous-duty operation.
Key Specifications
Regulations: No
Bevel Helical: PAM B
Size: 153
Housing Version: U-Universal
Output Shaft Version: C-Hollow Shaft
Ratio (i): 25.19
Input Dim: Ø400 x 55 (IEC200 B5)
Output Shaft Dim: Ø90
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 | ~56 rpm |
| 2-Pole | 2800 | ~111 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 200B5 IEC motor input. Confirm flange compatibility below:
| Motor Input | IEC Standard | Input Dimensions |
|---|---|---|
| 200B5 | IEC 60072 / IEC 60034 (B5 flange) | Ø400 x 55 |
If you’re unsure whether your motor is B5 or B14, contact our technical team and we’ll confirm compatibility.
Need the non-standard 80mm bore option?
If your application requires a 80mm output bore instead of the standard 90mm, we can supply this as a non-standard configuration. View available B103 options and request the 80mm version here: Motovario B153 Gearbox.
Internal Links & Compatible Options
Same ratio, different motor input: jump to the B153 25.19:1 variant you need with a 90mm bore.
Need a different ratio? Explore the closest B153 90mm bore ratios to this version.
More B153 options: Browse all Motovario B153 gearbox ratios
Explore the full B Series range: Motovario B Series bevel gearboxes
Helpful calculators: Gearbox Ratio & Speed Calculator | Output Torque Calculator
Ratio Selection Tips
Best for: industrial drive systems requiring a versatile middle-range reduction, including process machinery, assembly equipment, conveyors, and material transfer applications.
Selection tip: a 25.19:1 ratio offers a useful middle ground between speed retention and torque gain. It is a sensible choice for machinery that benefits from controlled output speed without moving into very high reduction territory. As with any gearbox selection, check running load, shock loads, and duty profile before finalising the specification.
FAQ
Will this ratio be too fast for my application?
For many general-purpose industrial applications, 25.19:1 is not excessively fast and provides a good compromise between speed and torque. If your machine needs very slow movement, more holding force, or heavier torque multiplication, a higher reduction ratio may be better suited.
Can I run this with a VFD?
Yes — pairing this gearbox with a VFD is a common way to improve machine control and fine-tune output speed. Just ensure the motor remains properly cooled when used at reduced speed for extended operating periods.
Configuration Notes
Input flange note: the 200B5 IEC motor input provides compatibility with larger IEC motor frames, helping this gearbox suit installations where stronger motor pairings are required.
Output bore note: the 90mm hollow bore output is intended for larger shafts and helps provide a dependable transmission connection in industrial duty applications.
Application example: a good fit for transfer conveyors, packaging lines, and automated machinery where a right-angle arrangement and balanced speed-to-torque performance are important.
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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