Overview
Motovario B153 149.26:1 bevel gearbox with a 90mm hollow bore output and 132B5 IEC motor input, designed for efficient 90° right-angle drive integration in industrial power transmission systems.
Built for dependable industrial service, it delivers stable speed reduction and consistent torque transfer for demanding plant, process, and OEM applications.
Very High Reduction: This very high reduction ratio delivers very low output speed with substantial torque multiplication, making it ideal for heavy-duty conveyors, screw feeders, mixers, dosing systems, and continuous-duty industrial machinery.
This configuration combines a 90mm hollow output bore with a 132B5 IEC motor input, providing secure shaft connection, reliable torque transmission, and dependable performance across conveyors, transfer systems, packaging lines, and machinery builds.
With its 132B5 flange input, this version is designed to suit larger IEC motors, offering increased input capacity and wider motor compatibility while retaining a compact right-angle installation footprint and proven industrial reliability.
As part of the modular Motovario B Series bevel helical gearbox range, this unit supports flexible mounting options, straightforward IEC motor fitment, and dependable long-term operation in continuous-duty industrial environments.
Key Specifications
Regulations: No
Bevel Helical: PAM B
Size: 153
Housing Version: U-Universal
Output Shaft Version: C-Hollow Shaft
Ratio (i): 38.81
Input Dim: Ø300 x 38 (IEC132 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 | ~36 rpm |
| 2-Pole | 2800 | ~72 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 132B5 IEC motor input. Confirm flange compatibility below:
| Motor Input | IEC Standard | Input Dimensions |
|---|---|---|
| 132B5 | IEC 60072 / IEC 60034 (B5 flange) | Ø300 x 38 |
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 B153 149.26:1 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
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.
Ratio Selection Tips
Best for: very demanding industrial applications that need extremely low output speed and high torque multiplication, including screw conveyors, mixers, feeders, crushers, and continuous-duty process machinery.
Selection tip: a 149.26:1 ratio is a strong choice when your application needs extremely slow output speed and higher torque multiplication. It suits machinery handling heavier loads or processes that benefit from steady, controlled movement.
FAQ
Will this ratio be too fast for my application?
A 149.26:1 ratio is intended for applications that need very slow shaft speed and strong torque multiplication. If your machinery needs noticeably faster output speed, a lower reduction ratio may be more suitable.
Can I run this with a VFD?
Yes — this gearbox can be paired with a VFD for more precise speed control, smoother acceleration, and improved process flexibility. When operating at very low motor speeds for long periods, make sure cooling remains adequate, especially under constant load conditions.
Configuration Notes
Input flange note: the 132B5 IEC input allows compatibility with larger IEC motors, providing a stable and versatile mounting arrangement for industrial drive systems where dependable input-side performance is important.
Output bore note: the 90mm hollow bore is designed for larger driven shafts, helping provide secure torque transmission and stable mechanical connection in demanding applications.
Application example: ideal for screw conveyors, heavy-duty conveying systems, and process machinery where a right-angle gearbox layout, dependable torque transmission, and very slow controlled output speed are required.
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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