Overview
This BA72 version combines a 100-112B14 motor interface with the standard 35mm hollow bore, giving users a right-angle drive option for larger IEC motor frames in space-conscious machinery.
Reduction profile: With a 33.04:1 reduction, this gearbox is aimed at installations that want more output control and a stronger torque increase for sustained industrial operation.
That pairing gives more flexibility on motor frame selection while still keeping the overall gearbox package tidy and easy to integrate into existing machinery.
Like the wider BA72 range, it uses efficient bevel-helical gearing to deliver smooth running, dependable mechanical efficiency, and reliable long-service performance in daily industrial operation.
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): 33.04:1
Input Dim: Ø160×28 (IEC 100-112 B14)
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 | ~42 rpm |
| 2-Pole | 2800 | ~85 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 100-112B14 IEC motor input. Confirm flange compatibility below:
| Motor Input | IEC Standard | Input Dimensions |
|---|---|---|
| 100-112B14 | IEC 60072 / IEC 60034 (B14 flange) | Ø160 × 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 33.04:1 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: heavier conveyors, handling systems, and industrial machinery that need slower shaft speed with stronger torque without stepping into the highest BA72 ratios.
Selection tip: choose 33.04:1 when you want the strongest torque gain within the medium reduction group before moving up to the slower high-ratio configurations.
FAQ
Will this ratio be too fast for my application?
33.04:1 is slower than the other medium-ratio options, so it suits machinery needing more controlled output and stronger torque rather than fast shaft speed.
Can I run this with a VFD?
Yes — this ratio can be paired with a VFD for extra process control and startup flexibility. It is useful where the application needs both torque multiplication and speed adjustment.
Configuration Notes
- Input flange note: the 100-112B14 interface allows pairing with larger IEC B14 motors while keeping the installation shorter than an equivalent B5 arrangement.
- 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: larger conveying systems, packaging machinery, and OEM equipment where a larger compact B14 motor arrangement is needed.
Typical Applications
- Suitable for production lines, processing equipment, automated handling systems, and general industrial machinery.
- 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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