Description
EPNMRV050/130 Combined Two-Stage Worm Gearbox
The EPNMRV050/130 is our flagship combined two-stage reducer configuration, pairing a 50 mm pre-stage with the top-of-range 130 mm main stage to deliver 1,318 Nm rated output torque across combined ratios from 100:1 up to 10,000:1. Australian deployments include sugar-mill juice-extraction auxiliary drives at Queensland operations, cement-mill trunnion auxiliary reducers, and heavy tailings-thickener rake drives at gold and iron-ore operations in WA. The 34.8 kg aluminium-housed assembly replaces cast-iron equivalents 2.5 to 3 times heavier without compromising the rated torque envelope.
EPNMRV050/130 Specifications
Full technical data for the EPNMRV050/130 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 | EPNMRV050/130 |
| Configuration | Combined two-stage worm reducer (pre-stage + main stage, factory-paired) |
| Centre distance | 50 + 130 mm |
| Rated output torque | 1318 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) | 1.5 kW |
| Output bore (hollow shaft) | 45 mm |
| Output shaft diameter (solid shaft) | 45 mm |
| Output radial load capacity | 10480 N |
| Motor flange – NEMA | 140TC / 180TC / 210TC |
| Motor flange – IEC | B5 (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 | 34.8 kg |
Engineering Features of the EPNMRV050/130
Six core design decisions that distinguish the EPNMRV050/130 from generic imported two-stage reducers. Every feature below is traceable to a real Australian operating constraint rather than a marketing abstraction.
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.
IEC and NEMA Motor Flanges
Pre-stage motor interface accepts IEC B5 or B14 flange-mount motors, or NEMA 56C/140TC/180TC/210TC flange-mount motors depending on the pre-stage frame size. Dual-standard compatibility simplifies sourcing for Australian customers.
Six Standard Mounting Orientations
Factory supports B3, B6, B7, B8, V5 and V6 mounting positions. Oil fill volume is calibrated at the factory to the declared mounting orientation. Vertical mounts (V5/V6) receive additional oil volume to ensure both worm wheels remain properly submerged.
100% End-of-Line Dynamometer Testing
Every combined unit is tested on a closed-loop dynamometer across the catalogue torque range. Noise measurement in a semi-anechoic booth. Temperature-rise monitored on both sumps during run-in. Test record retained per serial number for five years.
ADC12 Aluminium Housing
Die-cast ADC12 aluminium alloy housing delivers thermal conductivity three to four times higher than cast iron, maintaining stable oil-sump temperature under sustained two-stage operation. Salt-air corrosion resistance without active paint maintenance suits coastal NSW and Queensland installations.
Typical EPNMRV050/130 Applications Across Australia
The EPNMRV050/130 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.
Food & Beverage Processing
For food and beverage processing duty, the EPNMRV050/130 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 EPNMRV050/130 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 1318 Nm is well matched to typical rake-drive and thickener duty cycles.
Agriculture & Primary Production
For agricultural and primary-production applications, the EPNMRV050/130 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 EPNMRV050/130 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 1318 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.
Material Handling & Logistics
In material handling and logistics service, the EPNMRV050/130 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.
How to Specify the EPNMRV050/130 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 1318 Nm rating of the EPNMRV050/130. 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 1.5 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.
EPNMRV050/130 Technical Questions
The most common questions our engineering desk receives on the EPNMRV050/130 from Australian specifiers, OEM design engineers, and maintenance planning teams. Additional questions are welcome by email to our technical team.
How do I calculate required output torque for my application?
Required output torque is calculated from the driven load (mass, friction, radius) and the design service factor for the duty class. For many Australian applications – agitators, conveyors, rake drives – the driven-equipment OEM will supply a required-torque figure directly. Send the duty profile or OEM-published torque requirement to our engineering desk for sizing verification against the EPNMRV050/130 rating.
What output speed range is available on the EPNMRV050/130?
Combined ratios across this frame cover 100:1 through 10000:1 depending on the pre-stage and main-stage ratio combination selected. From a four-pole 1,400 rpm input, output speeds range from approximately 14 rpm on the lowest combined ratio down to 0.14 to 0.175 rpm on the highest combined ratio. Exact output speed for a specified combined ratio is given on request with the sizing worksheet.
Can the pre-stage and main-stage be serviced independently?
The pre-stage and main-stage are factory-paired as a matched assembly and share a common oil chamber across the interconnecting flange. Field servicing replaces the full combined assembly rather than individual stages. This approach preserves the warranty envelope and guarantees the run-in engagement quality between the two stages.
What motor power is typically specified for the EPNMRV050/130?
The pre-stage motor input capacity is 1.5 kW maximum for this frame. Typical Australian OEM applications pair this combined reducer with a 0.25 to 1.5 kW four-pole three-phase motor, sized according to the actual duty torque and operating speed rather than the combined-reducer catalogue maximum. Our engineering desk will verify motor sizing against your duty profile.
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.
What Engineers Say About the EPNMRV050/130
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.
Specified the EPNMRV050/130 into the azimuth tracker drive on a 12 MW commercial PV installation. The combined-ratio flexibility gave us exactly the output tracking rpm we needed without compromising torque capacity against wind-load peaks. Integration with our existing tracker controller was straightforward using the standard motor flange.
The EPNMRV050/130 drives slow-rotation rake reducers on tailings-thickener service at one of our Andean project sites. Elevated altitude and temperature swings stress the reducer envelope and the aluminium housing has managed the thermal-cycling exposure well across the first service year.
Integrating the EPNMRV050/130 into our slow-indexing rotary-table drive product line for European markets. Compact stacked envelope was a key selection driver against the alternative of two separate reducers with an external coupling. Documentation quality supported our qualification process.
Evaluated the EPNMRV050/130 for a retrofit project replacing a European-supplier catalogue reducer on a legacy conveyor drive. The mechanical dimensional envelope allowed direct bolt-on substitution without machine-frame modification. Build quality inspection was encouraging for further volume supply.
Working with the EPNMRV050/130 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.
Related Combined Two-Stage Configurations
Three related combined two-stage gearboxes across different torque and ratio envelopes. If the EPNMRV050/130 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 EPNMRV050/130?
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.
