NMRV+NMRV / NRV+NMRV
NMRV+NMRV / NRV+NMRV double-stage worm gear reducers
Double worm reducers built from two single-stage units for very low output speeds. Overall ratios up to 5000 and output torque up to 3182 N·m in the selection tables. Input via IEC motor flange (NMRV+NMRV) or free shaft (NRV+NMRV).
- Size combinations
- NMRV+NMRV: 025/030 … 063/150; NRV+NMRV: 030/040 … 063/150
- Overall ratio
- 100–5000
- Motor power (NMRV+NMRV tables, 1400 r/min)
- 0.06–1.5 kW
- Output speed
- 0.28–14 r/min
- Output torque (selection tables)
- NMRV+NMRV: up to 3182 N·m; NRV+NMRV: 29–2670 N·m
- Output radial load
- 1.62–18 kN
- Housing material
- 025–090 aluminium alloy; 110–150 cast iron
- Weight without motor (NMRV+NMRV)
- ≈1.9–90.2 kg
Features
- Built from two standard single-stage units and keeps all their advantages
- Very high ratios, up to 5000, in a compact package
- Standard combinations: 25/30, 25/40, 30/40, 30/50, 30/63, 40/75, 40/90, 50/110, 63/130, 63/150; other pairings of sizes 25–150 on demand
- IEC motor flange input or free input shaft; optional double input shaft (VS)
- Hollow output shaft with plug-in AS/AB shafts and F1/F2 output flanges
- Eight arrangements of stages and motor (AS1…PS2)
Designation
NMRV 40/50-900-0.37-AS1-PS1
| NMRV | hollow input with motor flange (NRV = shaft input) |
|---|---|
| 40/50 | sizes of the first and second stage |
| 900 | overall ratio |
| 0.37 | motor power, kW, or input flange type |
| VS | (option) double input shaft |
| AS1 | output: AS1/AS2 single shaft, AB double shaft, F… flange |
| PS1 | mounting position |
Versions
| NMRV+NMRV | Input through IEC motor flange |
|---|---|
| NRV+NMRV | Free input shaft on the first stage, e.g. NRV 030/050-900-AS1-PS1 |
| AS1 / AS2 / AB | Single or double output shaft |
| F1 / F2 | Output flange |
Mounting
- AS1
- AS2
- BS1
- BS2
- VS1
- VS2
- PS1
- PS2
Technical data
NRV+NMRV: ranges from the selection tables (input 1400 r/min)
| Combination | i | Output torque, N·m | Input power, kW | Output radial force, kN |
|---|---|---|---|---|
| 030/040 | 300–5000 | 29–73 | 0.01–0.1 | 3.49 |
| 030/050 | 300–4800 | 82–145 | 0.02–0.15 | 4.84 |
| 030/063 | 300–5000 | 150–230 | 0.04–0.24 | 6.27 |
| 040/075 | 300–5000 | 230–390 | 0.06–0.4 | 7.38 |
| 040/090 | 300–5000 | 410–610 | 0.1–0.6 | 8.18 |
| 050/110 | 300–5000 | 746–1265 | 0.1–1.1 | 10.32 |
| 063/130 | 300–5000 | 1100–1760 | 0.1–1.5 | 13.5 |
| 063/150 | 150–5000 | 1650–2670 | 0.2–3.4 | 18 |
NMRV+NMRV: main dimensions, mm
| Combination | I (output stage) | I2 (input stage) | Z | G1 | H | Weight, ≈ kg |
|---|---|---|---|---|---|---|
| 025-030 | 30 | 25 | 100 | 63 | 40 | 1.9 |
| 025-040 | 40 | 25 | 115 | 78 | 50 | 3 |
| 030-040 | 40 | 30 | 122 | 78 | 50 | 3.5 |
| 030-050 | 50 | 30 | 132 | 92 | 60 | 4.7 |
| 030-063 | 63 | 30 | 145 | 112 | 72 | 7.4 |
| 040-075 | 75 | 40 | 167.5 | 120 | 86 | 11.3 |
| 040-090 | 90 | 40 | 184.5 | 140 | 103 | 15.3 |
| 050-110 | 110 | 50 | 226 | 155 | 127.5 | 38.5 |
| 063-130 | 130 | 63 | 245 | 170 | 147.5 | 54.2 |
| 063-150 | 150 | 63 | 275 | 200 | 170 | 90.2 |
Data from the manufacturer’s catalogue. Full selection tables and dimension drawings are in the PDF catalogue.
Drawings
