Overview
B083 8.62:1 bevel helical gearbox with a 40mm hollow bore output and 90B5 IEC motor input for efficient 90° right-angle power transmission in industrial machinery.
Built for long service life, the B083 8.62:1 unit combines dependable torque transfer with stable running characteristics, while the 40mm hollow output and 90B5 input keep installation practical for day-to-day industrial duty.
Low reduction: At 8.62:1, this 90B5 / 40mm version maintains higher output speed while still increasing torque, making it well suited to faster conveyors, feeders, indexing equipment, and general automation with lighter running loads.
Using a 90B5 IEC motor input, this 8.62:1 configuration suits installations that need a little more motor frame capacity while still maintaining a compact right-angle drive package around the 40mm output.
As part of the modular Motovario B083 bevel helical gearbox range, this 8.62:1 variant combines IEC motor compatibility, compact right-angle mounting, and a 40mm hollow bore layout for OEM builds, replacements, and upgrade projects using 90B5 motors.
Key Specifications
- Series: B Series – Bevel Helical Gearboxes
- Model: B083
- Reduction Ratio: 8.62:1
- Output Bore: 40mm Hollow Bore
- Motor Input: 90B5 IEC Flange
- Housing Material: High-strength cast iron
- Gear Type: Spiral bevel + hardened helical stage
- Mounting Positions: B3 Horizontal Mount
- Duty Rating: Suitable for continuous industrial operation (S1)
Designed to IEC dimensional standards, ensuring seamless compatibility with IEC frame motors and inverter-driven applications.
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 | ~162 rpm |
| 2-Pole | 2800 | ~325 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 90B5 IEC motor input. Confirm flange compatibility below:
| Motor Input | IEC Standard | Input Dimensions |
|---|---|---|
| 90B5 | IEC 60072 / IEC 60034 (B5 flange) | Ø200 × 24 |
If you’re unsure whether your motor is B5 or B14, contact our technical team for compatibility confirmation.
Internal Links & Compatible Options
Same ratio, different motor input: jump to the B083 8.62:1 variant you need (40mm bore).
Need a different ratio? Explore the closest B083 40mm bore ratios above and below this version.
More B083 options: Browse all Motovario B083 gearbox ratios
Explore the full B Series range: Motovario B Series bevel gearboxes
Helpful calculators:
Gearbox Ratio & Speed Calculator |
Output Torque Calculator
Performance & Design Features
✔ Space-saving 90° bevel layout for compact machine designs
✔ High torque output from a compact, industrial-duty footprint
✔ Precision-machined spiral bevel gear set for smooth, low-noise power transfer
✔ Heavy-duty taper roller bearings for strong radial and axial load handling
✔ Well suited to inverter (VFD) driven motors and variable-speed control
✔ Rigid cast iron housing built for OEM and continuous-duty operation
Ratio Selection Tips
- Best for: Best for applications that need a quicker output speed with modest torque gain — such as faster conveyors, packaging infeed/outfeed, and indexing where responsiveness matters.
- Selection tip: low ratios suit responsive motion — check acceleration/inertia and ensure the driven equipment doesn’t require very slow output speed.
FAQ
Will this ratio be too fast for my application?
If you need very slow output speed, move up to a mid or high reduction ratio. Low ratios are best when you still want a relatively quick output with torque gain.
Can I run this with a VFD?
Yes — a VFD is ideal for fine speed control. Keep an eye on cooling at very low motor speeds if you reduce frequency for extended periods.
Typical Applications
- Conveyor and line-shaft drive systems
- Automated production and assembly lines
- Food and beverage processing machinery
- Materials handling and logistics equipment
- Pumps, mixers, and agitator drives
- OEM machine and equipment builds
Need help selecting the correct ratio, bore size, or motor input?
Contact our gearbox specialists for sizing assistance, torque verification, and availability confirmation.
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