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EPNMRV090 Aluminium Worm Gearbox — Overview
The EPNMRV090 is the flagship mid-size unit in the EPNMRV series, engineered specifically for the continuous-duty requirements of water and wastewater treatment plants, heavy conveyor drives, and municipal infrastructure projects. Rated to 4.8 kW input and 479 Nm output torque with a radial force rating of 8,180 N, it operates reliably across 24/7 duty cycles. Maintenance engineers in Australian water utilities value the EPNMRV090’s sealed, leak-resistant housing and baked enamel finish that withstand aggressive chlorinated and sulphide-rich plant atmospheres. At 13 kg it remains manageable for single-person installation, while six mounting configurations (B3, B6, B7, B8, V5, V6) accommodate pump-drive, agitator-shaft, and conveyor-tail orientations.
EPNMRV090 Technical Specifications
General Specifications
| Parameter | Value |
|---|---|
| Model | EPNMRV090 |
| Input Power (P1) | 0.37 – 4.8 kW |
| Max Output Torque (M2) | 479 Nm |
| Max Radial Force (Fr2) | 8180 N |
| Available Gear Ratios (i) | 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100 |
| Output Shaft Dia. | 35 mm / 1.375 in |
| Input Shaft Dia. | 22.225 mm / 0.875 in |
| NEMA Input Flange | NEMA 56C/140TC/180TC |
| IEC Input Flange | IEC 90/100/112 |
| Unit Weight | 13 kg |
| Housing Material | Die-cast ADC12 aluminium alloy |
| Worm Wheel Material | High-tensile phosphor bronze |
| Worm Shaft Material | 20CrMnTi alloy steel — case-hardened & ground |
| Surface Finish | Two-coat baked epoxy-polyester |
| Standard Mounting | B3 foot / VS IEC flange / hollow bore |
| Lubrication | ISO VG 220 synthetic gear oil |
| Input Speed (n1) | 1,400 rpm (50 Hz 4-pole reference) |
Inch-Series Dimension Reference
| Dimension | Inch Value | Metric Equivalent |
|---|---|---|
| A – Body width | 5.51 in | 140 mm |
| B – Body height | 5.31 in | 135 mm |
| J – Overall length | 8.19 in | 208 mm |
| Output shaft dia. | 1.375 in | 34.9 mm |
| Input shaft dia. | 0.875 in | 22.2 mm |
| NEMA flange | 56C/140TC/180TC | IEC 90/100/112 |
| Weight | – | 13 kg |
Performance Data — EPNMRV090 (n1 = 1,400 rpm)
| P1 (kW) | Ratio (i) | n2 (rpm) | M2 (Nm) | f.s. | Fr2 (N) |
|---|---|---|---|---|---|
| 1.5 | 10 | 140 | 90 | 2.2 | 3391 |
| 1.5 | 15 | 93.3 | 130 | 1.5 | 3882 |
| 1.5 | 20 | 70 | 168 | 1.3 | 4273 |
| 1.5 | 30 | 46.7 | 239 | 1.7 | 4891 |
| 2.2 | 10 | 140 | 134 | 2.3 | 3391 |
| 2.2 | 15 | 93.3 | 194 | 1.9 | 3882 |
| 2.2 | 20 | 70 | 252 | 1.4 | 4273 |
| 2.2 | 30 | 46.7 | 351 | 1.2 | 4891 |
| 4.0 | 7.5 | 186.7 | 184.2 | 1.6 | 3081 |
| 4.0 | 10 | 140 | 243 | 1.3 | 3391 |
| 4.0 | 15 | 93.3 | 352 | 1.0 | 3882 |
| 4.0 | 20 | 70 | 458 | 0.8 | 4273 |
| 4.8 | 7.5 | 186.7 | 221 | 1.3 | 3081 |
| 4.8 | 10 | 140 | 291 | 1.1 | 3391 |
| 4.8 | 15 | 93.3 | 422 | 0.9 | 3882 |
Key Features & Benefits — EPNMRV090
479 Nm for 24/7 Wastewater Duty
At 20:1 ratio with 4.0 kW input, the EPNMRV090 delivers 458 Nm — sustaining continuous drive output on sludge scrapers and flocculation paddle agitators through round-the-clock treatment plant operations without thermal overload.
8,180 N Radial Capacity for Heavy Conveyors
The oversized output shaft bearings handle 8,180 N radial force — well above the belt and chain pull forces on heavy industrial conveyors with 4–5 kW motors, ensuring bearing life exceeds 30,000 hours in standard continuous-duty service.
Sealed Against Chlorine & H₂S Atmospheres
Multi-lip shaft seals, a welded O-ring housing joint, and two-coat baked-epoxy exterior finish collectively resist the aggressive chlorinated and hydrogen sulphide-rich air that accelerates corrosion in wastewater treatment plant enclosures.
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Single-Person 13 kg Installation
Unlike equivalent cast-iron units at 35+ kg, the EPNMRV090’s 13 kg mass allows one maintenance engineer to handle installation, mounting adjustment, and oil changes without additional lifting equipment — significant in confined treatment plant spaces.
Six Mounting Orientations
B3, B6, B7, B8, V5, and V6 mounting configurations support pump flange drive, agitator vertical shaft, conveyor tail end, and wall-bracket installation. Each orientation’s correct oil fill volume is clearly defined in the lubrication chart.
Application Scenarios — Where the EPNMRV090 Excels
Water & Wastewater Treatment Plants
Municipal water treatment facilities and industrial effluent plants across Australia and Asia use the EPNMRV090 as the primary drive for sludge scrapers, flocculation paddles, and chemical dosing pump drives. The sealed housing withstands daily chlorine spray and H₂S off-gassing. Keyword: sealed worm gearbox for water and wastewater treatment plants Australia
Heavy Industrial Conveyor Systems
Quarry run-of-mine conveyors, coal handling systems, and port bulk cargo belt drives use the EPNMRV090 for its 4.8 kW input capacity and 8,180 N radial load rating. The aluminium housing saves 22+ kg per installation versus cast-iron equivalents. Keyword: heavy-duty worm reducer for industrial bulk conveyor drives
☀️ Large-Scale Solar Tracker Arrays
Commercial-scale dual-axis solar tracker arrays use the EPNMRV090 as the elevation-axis drive. At 30:1 ratio the unit provides the torque needed to move large panel frames against wind loading while the self-locking feature holds position between adjustments. Keyword: worm gearbox for large solar tracker array elevation drives
Pumping & Mixing in Process Industries
Chemical mixing reactors, oil-and-gas separator agitators, and pump drive units in process industries choose the EPNMRV090 for its combination of 479 Nm continuous output, IP65-capable sealing, and compact aluminium-alloy housing that tolerates process chemical splatter. Keyword: corrosion-resistant worm gearbox for chemical process industry equipment
Selection Guide & Comparison — EPNMRV090
How to Select the Right EPNMRV Model
Select the EPNMRV090 when torque is 150–479 Nm and input power is 0.37–4.8 kW. For wastewater/conveyor duty at 47–93 rpm use 15:1–30:1. For faster pump drives at 93–186 rpm use 7.5:1–15:1. For torque beyond 479 Nm consider the EPNMRV110.
Mounting Positions & Lubrication Notes
| Mounting | Code | Oil Fill Note |
|---|---|---|
| Horizontal — foot down | B3 | Standard fill volume (reference) |
| Horizontal — foot right | B6 | Same as B3 |
| Horizontal — foot left | B7 | Same as B3 |
| Horizontal — foot up | B8 | Same as B3 |
| Vertical — output shaft down | V5 | Increase fill ~20% above B3 reference |
| Vertical — output shaft up | V6 | Increase fill ~25% above B3 reference |
EPNMRV090 vs Traditional Cast-Iron Worm Reducer
| Attribute | EPNMRV090 (Aluminium) | Traditional Cast-Iron | Advantage |
|---|---|---|---|
| Weight | 13 kg | ~35 kg typical | 63% lighter — single-person installation |
| Corrosion resistance | Alloy + baked epoxy (H₂S rated) | Bare CI — rusts in wastewater | Lower replacement/maintenance cost |
| Continuous duty | Rated 24/7 at full torque | Derating required for 24/7 | Better for treatment plant use |
| Radial capacity | 8,180 N | 7,000 N typical | Handles heavier conveyor belt tension |
| Mounting orientations | 6 (B3–V6) | 4 typical | Suits confined treatment plant spaces |
Frequently Asked Questions — EPNMRV090
What is the maximum torque of the EPNMRV090?
479 Nm at 20:1 ratio with 4.0 kW input (70 rpm output). At 4.8 kW the output reaches 422 Nm at 15:1 (93 rpm). This covers the majority of sludge scraper, flocculation paddle, and heavy conveyor drive applications in water treatment and bulk material handling.
Is the EPNMRV090 suitable for 24/7 continuous operation?
Yes — the EPNMRV090 is rated for continuous-duty service at full rated power. Ensure the housing has a minimum 50 mm clear airspace for natural convection. In fully enclosed rooms above 35 °C ambient, add forced ventilation and use ISO VG 220 full synthetic oil.
What sealing specification is available for wastewater environments?
Standard EPNMRV090 is IP54. An IP65 variant with enhanced shaft seals and a sealed breather plug is available for direct spray applications and intermittently submerged service. The housing exterior finish is a two-coat baked epoxy-polyester resistant to pH 4–12 solutions and H₂S concentrations typical of wastewater treatment.
What NEMA motor frames are compatible?
56C (0.625 in bore, up to 0.75 kW), 140TC (0.875 in bore, up to 1.5 kW), and 180TC (1.125 in bore, up to 4.8 kW). All three are standard on the EPNMRV090 inch series, covering the full motor power range without adaptors.
What is the output shaft size?
35 mm metric (1.375 in inch series) with a 10 mm × 38.3 mm keyway. The 35 mm diameter fits standard heavy-duty conveyor drive sprocket bores and pump coupling hubs without custom machining.
How much oil does the EPNMRV090 require?
Approximately 1.2 litres of ISO VG 220 synthetic gear oil for horizontal B3 mounting. V5/V6 vertical orientations require 1.4–1.5 litres. In 24/7 wastewater duty, replace oil every 5,000 hours or every two years and inspect seals at each oil change.
Can the EPNMRV090 be used as a pump drive in a vertical V6 orientation?
Yes. The V6 (output shaft up) orientation suits vertical pump shaft drives. Increase oil fill to 1.5 litres and verify the vent plug is correctly positioned for this orientation per the lubrication chart. The multi-lip shaft seals in V6 orientation include a drainage groove to prevent wicking under hydrostatic pressure.
Customer Reviews — EPNMRV090
★★★★★
“Replaced cast-iron units with EPNMRV090s on our flocculation paddle drives at three Hunter Valley treatment plants. Two years of chlorinated atmosphere operation with zero corrosion or oil leaks — a dramatic improvement over the units they replaced. The 13 kg mass makes single-person servicing practical.”
Flocculation paddle drive, three water treatment plants, Hunter Valley NSW
Mark P.
Hunter Water Corporation — Australia
★★★★★
“Using the EPNMRV090 on our run-of-mine conveyor tail drives at the Sishen mine. The aluminium housing saves significant mass on elevated conveyor structures where every kilogram adds to structural steel cost. Performance at rated 4 kW has been consistent across 18 months of three-shift operation.”
ROM conveyor tail-end drive, Sishen mine, Northern Cape
Sipho N.
Kumba Iron Ore Ltd — South Africa
★★★★☆
“We operate the EPNMRV090 on our bulk aggregate conveyor drives in a dusty quarry environment. The sealed housing handles the silica dust well. The 30:1 ratio selection gives us the exact belt speed we need from our standard 4-pole motor — no frequency drive needed.”
Bulk aggregate conveyor drive, quarry operation, Nuevo León
Alejandro R.
Grupo Transportes del Norte — Mexico
Related Products & Compatible Accessories
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Compatible IEC B14 / NEMA Motors
Standard IEC B14 flange motors (IEC 90/100/112) and NEMA 56C/140TC/180TC frame motors pair directly with the EPNMRV090 VS motor flange. Single-phase and three-phase AC motors from 0.06 kW to 9.2 kW are available from Ever-power as matched gearmotor assemblies.
Output Flanges (FA / FB / FC / FD)
Multiple output flange configurations for the EPNMRV090 allow direct face-mounting to conveyor roller frames, agitator shaft hubs, and indexing disc assemblies without intermediate couplings.
Hollow Output Bore & Torque Arms
Hollow bore variant of the EPNMRV090 eliminates output shaft couplings. Supplied with a torque arm bracket that reacts output torque against the machine frame — ideal for conveyor head-drum and auger shaft-mount installations.
Double-Stage EPNMRV Combinations
The EPNMRV090 can be combined with a larger output stage (e.g., EPNMRV090/130 or EPNMRV025/090) to achieve ratios up to 5,000:1 for ultra-slow precision drives. Contact Ever-power for double-stage selection data.
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Torque Limiter & Backstop Options
Torque limiter couplings and mechanical backstops are available as accessories. Backstops prevent reverse rotation on inclined conveyors; torque limiters protect the gearbox from shock overloads in crusher infeed and auger drive applications.
24/7 Industrial Reliability — Water, Conveyors & Process Plant
The EPNMRV090 is trusted by water utilities, mining operators, and process engineers across Australia and globally. Contact Ever-power for IP65 specifications, custom mounting brackets, or volume supply pricing.
