Overview
This Motovario B153 93.05:1 bevel helical gearbox features a 90mm hollow bore output and 180B5 IEC flange input, supporting dependable 90° power transmission in industrial machinery.
Suited to industrial and OEM installations, it supports dependable right-angle power transmission with stable reduction characteristics under regular operating load.
Very High Reduction: Provides greater speed reduction and improved torque output, making it well suited to processing equipment, dosing systems, rotary machinery, and demanding industrial automation duties.
The combination of 90mm hollow shaft output and 180B5 IEC motor input makes this unit well suited to machinery that needs compact right-angle installation, dependable shaft connection, and consistent industrial performance.
The 180B5 motor input format makes this unit suitable for IEC motor pairing in machinery requiring robust flange mounting and dependable industrial drive integration.
Like other units in the Motovario B Series bevel helical range, it is designed for adaptable installation, reliable motor pairing, and dependable performance across industrial applications.
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: Ø350 x 48 (IEC180 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 180B5 IEC motor input. Confirm flange compatibility below:
| Motor Input | IEC Standard | Input Dimensions |
|---|---|---|
| 180B5 | IEC 60072 / IEC 60034 (B5 flange) | Ø350 x 48 |
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 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
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: process duties requiring deep speed reduction with dependable torque output, including agitators, dosing systems, mixers, and automation equipment handling heavier loads.
Selection tip: a 93.05:1 ratio is a practical option when your application benefits from deeper reduction and stronger torque output. It helps support consistent performance in slower-running process and automation systems.
FAQ
Will this ratio be too fast for my application?
This ratio is intended for machinery that benefits from very slow output movement and improved torque delivery. If your process requires quicker output speed, you may want to select a lower ratio.
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 180B5 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: a strong option for dosing systems, agitators, and rotary machinery that require deep speed reduction together with dependable torque output under load.
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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