Description
EP-NMRV130 — Extra-Large Aluminium Worm Gear Reducer for High-Power Drives
The EP-NMRV130 occupies the top end of the standard NMRV aluminium worm gearbox range before the NMRV150. With a 130 mm centre distance and 11 kW maximum input power, it produces up to 12,076 N·m output torque at ratio 100 — 31% more than the NMRV110 — while the die-cast aluminium housing keeps the unit weight at approximately 30 kg, roughly 55% lighter than an equivalent cast-iron reducer. This combination makes the NMRV130 uniquely suited to crane and hoist travel drives, heavy municipal sludge handling, large mixing reactors, port bulk material conveyors, and mining industry applications where torque demands are high but lifting heavy gearboxes with overhead cranes is costly and time-consuming. The NMRV130 introduces IEC flange compatibility up to 132B5, covering the complete 7.5–11 kW standard motor frame range, while the enlarged 45 mm standard output bore matches IEC 132 motor shaft diameters for direct hollow-shaft mounting.
Technical Specifications — EP-NMRV130
| Parameter | Value |
|---|---|
| Series | NMRV (Bore Input with Input Flange) |
| Centre Distance | 130 mm |
| Reduction Ratios | 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Rated Input Power | Up to 11 kW |
| Output Speed Range | 14 to 280 r/min (at 1400 r/min input) |
| Max Output Torque | 12,076 N·m |
| Housing Material | Die-cast aluminium alloy |
| Worm Wheel Material | Phosphor bronze |
| Worm Shaft Material | 20CrMnTi alloy steel, case hardened, precision ground |
| IEC Input Flanges | 90B5, 90B14, 100/112B5, 100/112B14, 132B5 |
| Output Bore Diameter | 45 mm standard (H7 with keyway) |
| Lubrication | ISO VG 220 gear oil (factory filled) |
| Mounting Positions | B3, B6, B7, B8, V5, V6 |
| Protection Class | IP54 |
| Ambient Temperature | -10°C to +40°C |
NMRV130 Performance Table (11 kW / 1400 r/min)
| Ratio (i) | Output Speed (r/min) | Output Torque (N·m) | Radial Load (N) | Service Factor (fs) |
|---|---|---|---|---|
| 7.5 | 187 | 3,893 | — | 1.9 |
| 10 | 140 | 4,285 | — | 1.8 |
| 15 | 93 | 4,905 | — | 1.4 |
| 20 | 70 | 5,399 | — | 1.1 |
| 25 | 56 | 5,816 | — | 1.1 |
| 30 | 47 | 6,181 | — | 1.1 |
| 40 | 35 | 7,607 | 788 | 1.2 |
| 50 | 28 | 8,084 | — | 1.2 |
| 60 | 23 | 8,897 | — | 1.0 |
| 80 | 18 | 10,185 | — | 1.0 |
| 100 | 14 | 12,076 | 655 | 1.1 |
✅ Key Features
📈 12,076 N·m Peak Torque
At 12,076 N·m the NMRV130 delivers 31% more torque than the NMRV110, opening the door to single-stage reduction on drives that would otherwise require a two-stage or parallel-shaft arrangement.
🕵 11 kW Direct Flange Motor Interface
Five IEC flange options up to 132B5 cover the full 5.5–11 kW motor range, enabling bolt-on motor mounting without intermediate couplings or shaft alignment.
◯ 45 mm Output Bore
The 45 mm H7 hollow output bore and DZ solid shaft match IEC 132 motor shaft diameters, enabling direct hollow-shaft mounting on driven equipment with no machined adaptors.
⛁ ~30 kg — 55% Lighter Than Cast Iron
The NMRV130 weighs approximately 30 kg versus 65–70 kg for a comparable cast-iron unit. This weight reduction directly cuts crane hire time and reduces structural loading on elevated conveyor frames and mixer top-plates.
🌞 Deep-Fin Passive Cooling at 11 kW
The NMRV130’s die-cast aluminium casing incorporates the deepest fin profile in the standard NMRV range to dissipate the heat generated at 11 kW continuous input without external cooling accessories.
🏭 Application Sectors
🚢 Crane & Hoist Travel Drives
Extra-large worm gear reducer for crane long-travel and cross-travel drives, hoist drum drives, and stacker-reclaimer slewing mechanisms where 8,000–12,000 N·m at 14–30 r/min is required.
📥 Large Chemical Reactors
High-torque aluminium worm gearbox for polymerisation reactor agitator shafts, glass-lined vessel mixing drives, and rubber compound internal mixers requiring smooth 11 kW input at very low output speed.
🍲 Mining Belt Conveyors
Worm gear reduction gearbox for underground mine belt conveyor take-up drives and surface ore-crusher feeder conveyors where peak torque demands exceed 8,000 N·m under shock loading.
💧 Municipal Sludge Systems
Heavy-duty worm gearmotor for large primary sludge thickeners, circular clarifier rake drives, and anaerobic digester top-entry mixer shafts in major municipal water treatment plants.
🔎 Sizing the NMRV130
Design Example — Crane Travel Drive
Required: 11 kW motor at 1400 r/min driving a crane long-travel wheel at 18 r/min (i=80). Output torque from table = 10,185 N·m. For medium-shock crane load fs=1.5: demand = 10,185/1.5 = 6,790 N·m — within rating. ✅ NMRV130-80-132B5 selected.
NMRV130 DZ/SZ Output Shaft Dimensions
| G1 (mm) | K1 (mm) | L/DZ (mm) | L1/SZ (mm) | b2 (mm) | d h6 (mm) | Keyway |
|---|---|---|---|---|---|---|
| 170 | 170 | 265 | 340 | 14 | 45 | M16 |
⚖ NMRV130 vs Cast-Iron Large Reducers
| Feature | EP-NMRV130 | Cast-Iron Equivalent |
|---|---|---|
| Approximate Weight | ~30 kg | ~68 kg |
| Max Output Torque | 12,076 N·m | Similar at 2.3x weight |
| IEC Flange Range | 90B5 to 132B5 — 5 sizes | Typically 2 sizes |
| Corrosion Life | 10+ years outdoor | 3–5 years without repainting |
| Heat Dissipation | Aluminium — 237 W/m·K | Cast iron — 52 W/m·K |
| Output Bore | 45 mm H7 — direct shaft mount | Often machined adaptor required |
❓ FAQs — EP-NMRV130
What differentiates the NMRV130 from the NMRV110?
The NMRV130 raises centre distance from 110 to 130 mm, increasing max output torque by 31% (12,076 vs 9,232 N·m) and input power from 7.5 to 11 kW. The output bore grows from 42 to 45 mm and IEC flange support extends to 132B5.
What is the maximum continuous input power at elevated ambient temperature?
At standard 25°C ambient, the NMRV130 handles 11 kW continuous. Between 25°C and 40°C, apply a 0.9 derating factor (9.9 kW effective). Above 40°C, consult our engineering team for forced-convection or synthetic lubricant options.
Is the NMRV130 suitable for crane travel drive applications?
Yes. The NMRV130 is used in crane long-travel and cross-travel drives at ratio 40–80. For crane applications classify the load as Class B (medium shock, fs=1.25–1.5) and verify the rated torque at the selected ratio exceeds the calculated wheel-rim torque multiplied by fs.
What output shaft options are available for the NMRV130?
Standard hollow bore 45 mm H7 with 14 mm keyway; DZ single solid shaft 45 mm h6 M16 key; SZ double-ended shaft; output flange (F); hollow output flange (FL). Custom shaft ends (threaded, tapered) available for OEM volume orders.
How often should oil be changed in the NMRV130 at full rated power?
Initial change at 500–1,000 hours. Subsequent changes every 5,000 hours or 12 months at rated power. At 11 kW continuous in warm ambient conditions, synthetic ISO VG 220 lubricant extends the interval to 8,000–10,000 hours and provides better film strength.
⭐ Customer Reviews
★★★★★
“We installed four NMRV130 units as long-travel drives on our overhead gantry crane. The weight saving versus the cast-iron units we previously used cut our installation crane time by three hours per unit. After 18 months of daily multi-shift operation, zero maintenance issues.”
Andrew B. — Crane Systems Engineer 🇦🇺 Australia (South Australia)
★★★★★
“Our large rubber compound internal mixer runs an NMRV130 at ratio 80 with an 11 kW motor. The start-up torque on cold compound is severe, but the NMRV130 handles it consistently. The phosphor-bronze worm wheel shows minimal wear after 2,000 operating hours.”
Gabriel R. — Production Manager, Rubber Compounding 🇧🇷 Brazil
★★★★☆
“Used on our municipal clarifier rake drives at ratio 100. Aluminium housing handles the chemical atmosphere in the clarifier building without corrosion. The IEC 132B5 flange made our 11 kW motor installation straightforward.”
Niamh F. — Asset Engineer, City Council Water Services 🇮🇪 Ireland
⚙ Accessories & Compatible Products
⚡ IEC Motors (B5/B14)
Standard single-phase and three-phase AC motors with matching IEC flange. VFD inverter-duty versions available.
🔗 Output Shaft Kits
Single solid (DZ), double-ended (SZ), output flange (F), hollow flange (FL) — all H7/h6 tolerance with standard keyways.
🔨 Torque Arms
Steel torque reaction arms for shaft-mount configurations; foot-mounting plates for B3/B6 orientations.
🔒 Seal & Breather Kits
Replacement lip-seal kits, vented breather plugs, and magnetic drain plugs for service intervals.
Specify the EP-NMRV130 for Your Project
From single retrofit units to OEM volume supply, our engineers will confirm the right configuration for your load within one business day. Distributor and project pricing available worldwide.
The EP-NMRV130 aluminium worm gear reducer has a 130 mm centre distance, ratios from 5 to 100, rated input power up to 11 kW, and maximum output torque of 12,076 N·m. IEC flanges 90B5 through 132B5 are directly compatible. This extra-large worm gearbox is engineered for the most demanding industrial drives — heavy municipal sludge systems, mining conveyors, large chemical reactors, and port material-handling equipment — in a corrosion-resistant aluminium housing that weighs up to 60% less than cast-iron equivalents.
