What is an SW worm gear reducer?
The SW worm gear reducer (Motovario series) is compact, with a round smooth aluminium housing, designed as a complement to the NMRV series for space-constrained applications. Seven sizes (030–105) with shaft heights from 30 to 110 mm, power up to 7.5 kW and torque up to 630 Nm. Bearings, motor flanges and accessories are identical to the NMRV series. Nibora Ltd offers SW worm gearboxes on request.
Technical Data by Size
| Size | Code | Power P1 (kW) | Max M2 (Nm) | Ratio i | Max Fr2 (N) |
|---|---|---|---|---|---|
| SW 030 | 030 | up to 0.25 | up to 50 | 5–100 | up to 3,490 |
| SW 040 | 040 | up to 0.55 | up to 100 | 5–100 | up to 4,000 |
| SW 050 | 050 | up to 0.75 | up to 160 | 5–100 | up to 5,000 |
| SW 063 | 063 | up to 1.10 | up to 250 | 5–100 | up to 6,000 |
| SW 075 | 075 | up to 1.50 | up to 380 | 5–100 | up to 7,380 |
| SW 090 | 090 | up to 2.20 | up to 500 | 5–100 | up to 8,180 |
| SW 105 | 105 | up to 7.50 | up to 630 | 5–100 | up to 10,000 |
Versions
| Code | Description (EN) |
|---|---|
| SW | PAM flange for direct IEC motor coupling |
| ISW | Gearbox only with input shaft |
| SWL | With torque limiter |
Key Features
- Compact round smooth housing – minimum footprint
- Identical bearings, flanges and accessories to NMRV series
- 7 sizes (030–105), shaft heights 30–110 mm
- Aluminium housing – lightweight and corrosion resistant
- Synthetic oil – universal mounting, lifetime fill
- Gear ratios i = 5–100
- Compound configurations SW+SW and SW+ISW
- ATEX version on request
- 2-year warranty from delivery
How to Order
SW series is on request – not in stock. Specify: size, version (SW/ISW/SWL), gear ratio and mounting position.
Tel. +359 64 681 058 | nibora@nibora.com | nibora.com
SW Catalogue
Download PDF ↓FAQ
What is the difference between SW and NMRV gearboxes?
Both are Motovario worm gearboxes with similar technical parameters. The key difference is the housing: SW has a compact round smooth body – less space. Bearings, flanges and accessories are identical, making the two series fully interchangeable.
What is the maximum power?
Up to 7.5 kW (SW105). For higher power, choose the NMRV series (up to 18.5 kW).
When to choose SW instead of NMRV?
When the installation space is critically limited, power is up to 7.5 kW, and you need a more compact housing than NMRV provides.
Is ATEX available?
Yes – ATEX version available on special request. Specify the zone when enquiring.