Product Overview
Motovario B series are helical bevel gear reducers with a right-angle (90°) between input and output shafts. The combination of helical and spiral bevel gearing delivers high mechanical efficiency and low-noise operation. The series covers cast iron (sizes 063–163) and aluminium BA series (A40–A70), with power up to 90 kW and torque up to 13,000 Nm. Nibora Ltd offers B series on request.
Technical Data by Size Group
| Sizes | Housing | Stages | Max M2 (Nm) | Power P1 (kW) | Ratio i | Max Fr2 (N) |
|---|---|---|---|---|---|---|
| B063–080 | Cast iron | 2 | up to 1,500 | up to 15 | 5.71–48.6 | up to 18,000 |
| B100–125 | Cast iron | 2 | up to 5,000 | up to 45 | up to 107 | up to 35,000 |
| B143–163 | Cast iron | 3 | up to 13,000 | up to 90 | up to 187 | up to 55,000 |
| BA040–A50 | Aluminium | 2 | up to 150 | up to 3 | 5.71–48.6 | up to 5,500 |
| BA070 | Aluminium | 2 | up to 450 | up to 7 | up to 48.6 | up to 10,000 |
Versions
| Code | Description (EN) |
|---|---|
| B | PAM flange for IEC motor coupling |
| IB | Gearbox only with input shaft |
| CB | Compact geared motor |
| PB | With flexible coupling |
Key Features
- Right-angle (90°) between input and output shafts
- Gleason spiral bevel gear pairs as second reduction stage – high resistance
- Two housing materials: G200 grey cast iron (063–163) and aluminium (BA series A40–A70)
- 2 or 3 reduction stages – ratio i = 5.71 to 187.24
- Max torque 13,000 Nm, max radial load 55,000 N
- FEM-optimised housing
- Accessories: torque arm, output flange, shrink disc, backstop device
- ATEX certification 2GD/3GD
- Standards: ISO 6336, AGMA 2001-B88
- 2-year warranty from delivery
How to Order
B series is on request – not in stock. Specify: size, version (B/IB/CB/PB), stages, gear ratio and mounting configuration.
Tel. +359 64 681 058 | nibora@nibora.com | nibora.com
B Series Catalogue
Download PDF ↓FAQ
What is the difference between B series and H series?
H series are inline (coaxial) gearboxes – input and output on the same axis. B series are helical-bevel with a 90° right angle between input and output. Choose B when the motor and driven machine must be at right angles.
Difference between cast iron B and aluminium BA?
Cast iron B (063–163): heavy-duty, up to 13,000 Nm and 90 kW. Aluminium BA (A40–A70): lighter, up to 450 Nm and 7 kW – an alternative to NMRV when a right-angle drive is needed.
What is a Gleason bevel gear?
Gleason is a manufacturing method for spiral bevel gears ensuring gradual meshing and lower noise. In B series, Gleason bevel gears form the second reduction stage.
Maximum power?
Up to 90 kW (B143–163, 3 stages). B063–080: up to 15 kW; B100–125: up to 45 kW.
ATEX available?
Yes – 2GD/3GD, T=135°C (T4). Specify zone when ordering.