Description
EPNRV130 Inch-Series Worm Gearbox
The EPNRV130 is our flagship inch-series single-stage worm gearbox, with a 130 mm centre distance, 1-3/4 inch output shaft and NEMA 210TC / 250TC motor flange compatibility. Rated output torque of 1,318 Nm across ratios from 5:1 to 100:1 at up to 7.5 kW motor input supports cement-plant auxiliary drives, heavy-duty NEMA-spec industrial applications, and mining-circuit primary-drive retrofits where the incumbent unit is an aging US heritage reducer at end of service life. The 37.8 kg aluminium-housed envelope remains substantially lighter than the cast-iron heritage equivalents.
EPNRV130 Specifications
Full technical data for the EPNRV130 inch-series worm gearbox. Values verified at end-of-line dynamometer test and retained on serial-number record for five years. Non-standard shaft modifications including hybrid metric-keyway-on-inch-shaft configurations and food-grade lubricant fills are available on request through our engineering desk.
| Specification | Value |
|---|---|
| Model designation | EPNRV130 |
| Configuration | Single-stage worm reducer, inch-series (NEMA-compatible) |
| Centre distance | 130 mm |
| Rated output torque | 1318 Nm |
| Reduction ratio range | 5:1 to 100:1 |
| Output shaft speed (4-pole 1,400 rpm input) | 14 – 280 rpm |
| Motor input power (max) | 7.5 kW |
| Output shaft diameter (solid) | 1-3/4″ (44.5 mm) |
| Output bore (hollow) | 1-3/4″ (44.5 mm) |
| Output keyway | 3/8″ square UNF |
| Output radial load capacity | 10480 N |
| Motor flange – NEMA C-face | 210TC / 250TC |
| Motor flange – IEC (where supported) | B5 |
| Mechanical efficiency (approximately) | 80 percent at mid-ratio |
| Housing material | ADC12 die-cast aluminium alloy |
| Worm shaft material | 20CrMnTi case-hardened alloy steel, ground ISO grade 6 |
| Worm wheel material | CuSn12 tin-bronze centrifugal casting |
| Lubricant | Synthetic PAG ISO VG 320 (factory fill, food-grade available) |
| Shaft seals | Viton (FKM) double-lip seals |
| Ingress protection | IP55 (labyrinth upgrade available) |
| Fastener standard | UNF (Unified Fine Thread, SAE J429 grade 5/8) |
| Mounting positions | B3, B6, B7, B8, V5, V6 |
| Assembled weight | 37.8 kg |