Description
EPNMRV040/075 Combined Two-Stage Worm Gearbox
The EPNMRV040/075 is a mid-range combined two-stage reducer, factory-paired from a 40 mm pre-stage and a 75 mm main stage. The combination delivers 306 Nm rated output torque across an extended combined-ratio range of 100:1 through 10,000:1, reaching output speeds as low as 0.14 rpm. Typical Australian deployments include packaging-line accumulators on Western Sydney DC operations, dairy-shed sweep arms in Gippsland and Tasmanian processing plants, and craft-brewery bottling tensioners. At 9 kg the unit is compact enough for conveyor-side mounting on narrow packaging frames.
EPNMRV040/075 Specifications
Full technical data for the EPNMRV040/075 combined two-stage worm gearbox. Verified at end-of-line test and retained on serial-number record for five years. Values represent the rated envelope for catalogue-standard configurations – non-standard shaft modifications and mounting variations are available on request through our engineering desk.
| Specification | Value |
|---|---|
| Model designation | EPNMRV040/075 |
| Configuration | Combined two-stage worm reducer (pre-stage + main stage, factory-paired) |
| Centre distance | 40 + 75 mm |
| Rated output torque | 306 Nm |
| Combined ratio range | 100:1 to 10000:1 |
| Output shaft speed (4-pole 1,400 rpm input) | 0.14 – 14.0 rpm |
| Pre-stage input power (max) | 0.75 kW |
| Output bore (hollow shaft) | 28 mm |
| Output shaft diameter (solid shaft) | 28 mm |
| Output radial load capacity | 4210 N |
| Motor flange – NEMA | 56C / 140TC |
| Motor flange – IEC | B5 / B14 (pre-stage) |
| 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) |
| Shaft seals | Viton (FKM) double-lip seals |
| Ingress protection | IP55 (labyrinth upgrade available) |
| Mounting positions | B3, B6, B7, B8, V5, V6 |
| Assembled weight | 9.0 kg |
Engineering Features of the EPNMRV040/075
Six core design decisions that distinguish the EPNMRV040/075 from generic imported two-stage reducers. Every feature below is traceable to a real Australian operating constraint rather than a marketing abstraction.
Factory-Matched Worm Sets
Both the pre-stage and main-stage worm-and-wheel pairs are factory-matched and lapped at the production line. Engagement geometry is verified for each serial number before assembly. Replacement sets are supplied as matched pairs for predictable run-in.
Synthetic PAG Lubrication
Factory fill with ISO VG 320 synthetic polyalkylene glycol maintains film viscosity from -20 °C cold starts through +90 °C sustained sump temperature. Superior film retention under low-rpm output-stage conditions where mineral-oil alternatives can drop out and accelerate wheel wear.
Viton Double-Lip Shaft Seals
Viton (FKM) double-lip seals at both the input shaft of the pre-stage and the output shaft of the main stage. Temperature rating to 200 °C continuous. Nitrile alternatives would harden and crack at Australian summer ambient inside enclosed packaging cabinets.
IP55 Sealed Housing
Standard IP55 ingress-protection rating across both stages. Labyrinth-seal output-shaft upgrade available for dust-intensive service in Pilbara mining and wheat-belt grain-handling applications. Pressure-equalising breather plug prevents internal pressure build-up during thermal cycling.
Dual Pre-Stage and Main-Stage Efficiency
Mechanical efficiency across the combined drive train is typically 50 to 70 percent depending on combined ratio, in line with industry norms for two-stage worm construction. Actual efficiency at operating point is calculated and reported in our sizing worksheet.
Low-Speed Service-Factor Rating
Service factors are re-verified for the combined drive train. Rated output torque holds under continuous duty at very low output speeds where single-stage ratings may require derating for heat-soak reasons.
Typical EPNMRV040/075 Applications Across Australia
The EPNMRV040/075 is specified into five primary Australian industry sectors. The descriptions below reflect real deployments rather than catalogue theory, drawn from field installations where output shaft speeds below 14 rpm are required continuously.
Material Handling & Logistics
In material handling and logistics service, the EPNMRV040/075 drives pallet-transfer accumulators, slow-indexing crate conveyors and bulk-terminal bucket-elevator auxiliary drives where output shaft speeds below 3 rpm are required. The combined two-stage construction reaches these low speeds directly from a standard four-pole motor input without requiring a chain reduction in the driveline, eliminating a wear component common on Australian packaging-hall conveyors. Typical deployments are seen at Western Sydney and Melbourne distribution centres running 24/7 three-shift operations.
Food & Beverage Processing
For food and beverage processing duty, the EPNMRV040/075 powers spiral-freezer tensioners, CIP-tolerant agitator reducers and slow-index bottling-line accumulators at Australian dairies and craft breweries. The aluminium-housed body handles repeated caustic washdown exposure without corrosion bloom, and factory-fill with food-grade H1 synthetic lubricant is available on request. Output speeds below 1 rpm are commonly specified for mixer and blender reducers where batch homogenisation time must be precisely controlled across multi-hour production cycles.
Environmental & Water Treatment
In environmental and water-treatment service, the EPNMRV040/075 drives clarifier centre-rake reducers, flocculator agitators and sludge-dewatering belt-press slow drives at municipal and private plants across regional NSW, Victoria and Queensland. The viton lip-seal package handles chlorinated and caustic splash common around chemical-dosing skids, and the IP55 housing tolerates outdoor open-tank installation through Australian wet-season conditions. Output torque of 306 Nm is well matched to typical rake-drive and thickener duty cycles.
Agriculture & Primary Production
For agricultural and primary-production applications, the EPNMRV040/075 drives livestock feeding augers, dairy-shed sweep-arm reducers and solar-tracker azimuth drives on NT, Queensland and WA rural holdings. The aluminium housing dissipates heat effectively in 45 °C ambient on exposed cattle-station feed-pad installations, and the combined ratio range supports the ultra-low output speeds required for solar-panel tracking motion across a daylight cycle. Synthetic PAG lubricant maintains film integrity through the diurnal thermal swing.
Mining & Minerals Processing
In mining and minerals-processing service, the EPNMRV040/075 powers tailings-thickener rake drives, sample-preparation ball-mill auxiliary reducers and conveyor tensioning drives at Pilbara iron-ore and Kalgoorlie gold operations. The labyrinth-seal output-shaft upgrade is recommended for red-dust Pilbara conditions, and marine-grade paint is specified for coastal bulk-terminal installations. Rated output torque of 306 Nm with the combined-ratio range covering 100:1 to 10,000:1 addresses the ultra-low-speed rake and thickener drives typical of Australian tailings dams.
How to Specify the EPNMRV040/075 Correctly
A combined two-stage worm gearbox is specified when output rpm requirements fall below the practical range of a single-stage NMRV reducer. Three checks matter most: required output torque, required output speed (which sets the combined ratio), and the duty service factor. Our engineering desk verifies all three from customer-supplied duty data before issuing a recommendation.
1. Confirm Output Torque
Target output torque must be within the 306 Nm rating of the EPNMRV040/075. Apply an appropriate service factor for the duty class (1.0 uniform / 1.25 moderate shock / 1.5 heavy shock) on top of the nominal load torque.
2. Set Combined Ratio
Required output rpm at the driven load determines the combined ratio selection. Combined ratios available range from 100:1 to 10000:1 through different pre-stage and main-stage ratio pairings. Specify target output rpm to our engineering desk for a ratio match.
3. Check Motor Power
Pre-stage motor input capacity is 0.75 kW maximum. Actual motor selection is driven by the operating output torque and rpm, not the catalogue maximum. Our sizing worksheet confirms motor-reducer compatibility.
EPNMRV040/075 Technical Questions
The most common questions our engineering desk receives on the EPNMRV040/075 from Australian specifiers, OEM design engineers, and maintenance planning teams. Additional questions are welcome by email to our technical team.
What is the expected service life in continuous duty?
Under rated output torque and appropriate synthetic oil fill, expect 20,000 to 30,000 service hours before worm-wheel wear becomes noticeable as backlash drift in the main-stage output. Very low-speed applications tend to show longer life since the surface velocity at the worm engagement is reduced compared to single-stage operation.
Are custom output shaft extensions available?
Custom shaft lengths, non-standard keyways (including metric 8×7 keyways on inch-dimensioned shafts), double-extended output shafts for dual-drive arrangements, and shaft-end protective covers are all available on the main-stage output. Minimum order quantities apply for non-catalogue shaft variants. Drawing-level specification is exchanged with our engineering desk during the quotation stage.
How does the combined efficiency compare to a single-stage reducer?
Mechanical efficiency for a two-stage worm arrangement is the product of the two stage efficiencies. For typical NMRV combinations this gives a combined mechanical efficiency in the 50 to 70 percent range, lower than a single-stage worm reducer. This is the expected trade-off for reaching the very high reduction ratios that a single-stage configuration cannot deliver practically.
What mounting orientations are supported?
The EPNMRV040/075 supports the six standard mounting positions: B3, B6, B7, B8, V5 and V6. The oil charge volume is factory-calibrated to the declared mounting orientation – vertical mounts (V5, V6) receive additional oil volume to ensure both the pre-stage and main-stage worm wheels remain properly submerged at start-up. Specify the mounting orientation at the quotation stage.
Can you supply food-grade or washdown-tolerant variants?
USDA H1-rated synthetic lubricant fill, stainless-steel fastener upgrades, and washdown-tolerant paint systems for daily caustic CIP exposure are all available on request. Specify the requirement at quotation stage so the factory can configure the correct lubricant, seal material, and surface finish across both the pre-stage and main-stage.
Is the combined unit dimensionally compatible with competitor two-stage reducers?
The mounting flange pattern on the main stage follows standard NMRV dimensions and is dimensionally interchangeable with equivalent-frame European catalogue units from the major brands. Overall envelope dimensions vary slightly with the pre-stage. Send existing-unit dimensional drawings to our engineering desk for a retrofit compatibility check before ordering.
What Engineers Say About the EPNMRV040/075
Verified customer feedback from Australian and international engineering customers. Names and companies are published with permission. Review text is paraphrased to protect commercial-in-confidence project detail where necessary.
The EPNMRV040/075 powers our slow-sweep coal-dust collection auger drives at the terminal. Very low output rpm requirement that cannot be achieved practically with a single-stage worm reducer of this footprint. The unit has been running through 18 months of coastal-exposure weather without issue.
Working with the EPNMRV040/075 for slow-speed agitator applications in our food-processing equipment product line. NEMA motor-flange option simplified motor sourcing in our market. Supplier responsiveness on our dimensional-customisation request was prompt and technically competent.
Deployed the EPNMRV040/075 in a solar-tracker azimuth drive product for European utility-scale PV installations. The combined-ratio range addresses our tracking-rpm requirement directly. Integration with our existing tracker-controller interface was straightforward.
The EPNMRV040/075 powers slow-rotation circulation drives on our fish-farm agitator product line. Corrosion resistance in the marine salt-air environment is the key technical driver for the aluminium housing selection. Performance through the first 10 months of continuous service has been without issue.
Stocking the EPNMRV040/075 for the Southeast Asian industrial reducer market. Customer feedback on the combined-ratio capability and compact envelope has been positive. The IP55 housing suits the tropical ambient in regional end-user installations.
Related Combined Two-Stage Configurations
Three related combined two-stage gearboxes across different torque and ratio envelopes. If the EPNMRV040/075 is close but not exactly matched to your duty requirement, one of the alternatives below may be the better fit.
Browse the full combined two-stage range or return to the Ever-power Australia Gearbox homepage.
Ready to Specify the EPNMRV040/075?
Send your duty-cycle parameters to our Australian engineering desk and receive a sized recommendation, compatible motor options, and a firm quotation. Technical enquiries are handled by the engineer responsible for the product, not a generic sales desk.
