Overview
Configured for a 100-112B5 motor input, this BA72 gearbox combines higher IEC frame compatibility with the standard 35mm hollow bore in a proven right-angle bevel-helical format.
Reduction profile: At 67.96:1, this configuration sits at the deeper end of the high-reduction BA72 range, making it well suited to slower-running equipment where strong torque delivery and controlled movement matter most.
It is particularly useful in slower conveyor runs, metering equipment, handling systems, and machinery where a calmer output speed improves consistency and load control.
For machinery designed around larger B5 flange motors, this version gives a straightforward route to deeper speed reduction while retaining the usual 35mm output connection.
The BA72 arrangement is intended for dependable industrial service, with efficient torque transfer and stable low-speed running across conveyors, handling lines, and process equipment.
Need the non-standard 30mm bore option?
If your application requires the non-standard 30mm output bore instead of this standard 35mm version, we can supply that configuration as well. View available BA72 options and request the non-standard bore version here: Motovario BA72 Gearbox.
Key Specifications
Regulations: No
Bevel Helical: PAM B
Size: A72
Housing Version: U-Universal
Output Shaft Version: C-Hollow Shaft
Ratio (i): 67.96:1
Input Dim: Ø250×28 (IEC 100-112 B5)
Output Shaft Dim: Ø35
Rotation Direction: Standard
ON-Oil Plugs: No Plugs (Standard)
Mounting Position: U
ON-Output Oil Seal: NBR-Nitrile
ON-Input Oil Seal: NBR-Nitrile
ON-Output Bearings: Ball Bearings
ON-Lubrication: Mineral SAE 85W-140
Paint: Ral 5010 Blue
Designed to IEC mounting and interface standards, this gearbox offers straightforward compatibility with IEC frame motors and dependable performance in direct-on-line or VFD-controlled drive systems.
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 | ~21 rpm |
| 2-Pole | 2800 | ~41 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 100-112B5 IEC motor input. Confirm flange compatibility below:
| Motor Input | IEC Standard | Input Dimensions |
|---|---|---|
| 100-112B5 | IEC 60072 / IEC 60034 (B5 flange) | Ø250 × 28 |
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 BA72 67.96:1 variant you need (35mm bore).
Need a different ratio? Explore the closest BA72 35mm ratios around this version.
More BA72 options: Browse all Motovario BA72 gearbox ratios
Explore the full BA Series range: Motovario BA Series bevel gearboxes
Helpful calculators:
Gearbox Ratio & Speed Calculator |
Output Torque Calculator
Ratio Selection Tips
Best for: very slow conveyors, heavy handling systems, and industrial machinery requiring the strongest torque output in this BA72 group.
Selection tip: choose 67.96:1 when you need the slowest shaft speed and highest torque multiplication within this BA72 high reduction set.
FAQ
Will this ratio be too slow for my application?
67.96:1 is the slowest of these high reduction options, so it is selected where maximum torque multiplication and lower shaft speed are the main priorities.
Can I run this with a VFD?
Yes — using a VFD with 67.96:1 allows fine speed control and gentler startup while retaining strong low-speed torque output.
Configuration Notes
- Input flange note: the 100-112B5 motor input allows direct flange mounting for larger IEC motors where a more substantial B5 interface is preferred.
- Output bore note: this build uses the standard 35mm bore. A 30mm BA72 bore is available as a non-standard option if a smaller shaft size is required.
- Application example: main conveyor drives, process machinery, and OEM equipment where a larger direct-mount motor arrangement is required.
Typical Applications
- Conveyor and transfer drive systems
- Packaging and process handling equipment
- Automated production and assembly lines
- Light materials handling equipment
- Rotary equipment and general machinery 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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