Overview
Motovario B153 30.35:1 bevel gearbox with a 90mm hollow bore output and 200B5 IEC motor input, developed for efficient 90° drive transmission in industrial processing, conveying, and OEM machine builds.
Built to deliver reliable gearbox performance over extended service periods, it offers smooth speed reduction, practical torque increase, and stable operation in demanding working conditions.
Medium Reduction: Offers a balanced reduction ratio that maintains efficient output speed while increasing torque capacity, making it suitable for a wide range of industrial drive applications.
By combining a 90mm hollow bore output with a 200B5 IEC motor input, this configuration provides dependable shaft mounting, efficient mechanical power transfer, and flexible application suitability across automation, handling, and production systems.
The 200B5 flange input supports compatibility with larger IEC motors, giving greater input-side flexibility for higher power installations while maintaining a compact, space-efficient right-angle gearbox arrangement.
As part of the established Motovario B Series bevel helical gearbox range, this model offers modular design advantages, easy IEC motor pairing, and dependable industrial-duty operation.
Key Specifications
Regulations: No
Bevel Helical: PAM B
Size: 153
Housing Version: U-Universal
Output Shaft Version: C-Hollow Shaft
Ratio (i): 30.35
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 | ~46 rpm |
| 2-Pole | 2800 | ~92 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 30.35:1 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: medium-duty industrial applications where a balanced reduction ratio is required for efficient speed control and dependable torque multiplication, such as conveying, processing, transfer, and automation equipment.
Selection tip: a 30.35:1 ratio is a strong all-round choice when you need more reduction than a fast-running setup but do not require the very slow output speeds of higher-ratio units. It is particularly useful in machinery where operating efficiency, layout flexibility, and reliable ongoing performance are key considerations. Always verify service factor, load conditions, and running cycle before final specification.
FAQ
Will this ratio be too fast for my application?
In many cases, 30.35:1 provides a well-balanced result rather than being too fast. It is better suited to equipment that benefits from moderate output speed and useful torque increase. For slower heavy-duty drives, a higher ratio may be preferred.
Can I run this with a VFD?
Yes — this gearbox can be used alongside a VFD to improve speed control and operational smoothness. Where motors run slowly for long durations, confirm that cooling and thermal limits are suitable for the duty.
Configuration Notes
Input flange note: the 200B5 IEC input gives the gearbox compatibility with larger IEC motor frames, supporting flexible use in a wide range of industrial drive installations.
Output bore note: the 90mm hollow bore is intended for larger shaft sizes and helps provide a stable, high-capacity output connection for torque transmission.
Application example: well suited to conveyor systems, packaging equipment, and transfer machinery where a right-angle gearbox, balanced speed reduction, and reliable industrial-duty performance are needed.
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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