Overview
Designed for heavy-duty right-angle drive applications, the Motovario B153 93.05:1 bevel gearbox is supplied with a 90mm hollow bore and 200B5 IEC motor input.
Designed for demanding machinery duties, it offers dependable speed reduction, efficient torque transfer, and proven suitability for industrial operating environments.
Very High Reduction: Favouring torque over speed, this ratio is well suited to continuous-duty industrial equipment, heavier mechanical loads, and applications that benefit from steady, controlled shaft movement.
With its 90mm hollow bore and 200B5 IEC input arrangement, this gearbox supports straightforward integration into plant equipment requiring dependable torque transmission and controlled output movement.
Using a 200B5 IEC input flange, this version supports secure motor connection, practical installation, and dependable compatibility within right-angle industrial drive assemblies.
As a member of the Motovario B Series, this gearbox offers the installation flexibility, IEC motor compatibility, and durable industrial build quality expected from the range.
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: 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 | ~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 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 93.05:1 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: continuous-duty machinery with higher mechanical demand, where low output speed and stable torque delivery are preferred over faster shaft rotation.
Selection tip: a 93.05:1 ratio is often the right choice when torque output and controlled motion take priority over speed. It is especially useful for continuous-duty machinery subject to heavier operating loads.
FAQ
Will this ratio be too fast for my application?
This 93.05:1 ratio prioritises torque multiplication and very low output speed. For applications where faster shaft speed is needed, a lower reduction ratio is likely to be a better fit.
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 200B5 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 continuous-duty industrial plant and loaded mechanical systems where slower output movement and stable torque delivery support reliable 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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