Description
EPNRV110 Inch-Series Worm Gearbox
The EPNRV110 is a heavy-frame inch-series reducer combining a 110 mm centre distance, 1-5/8 inch output shaft and NEMA 180TC / 210TC motor flange compatibility. Rated output torque of 855 Nm across ratios from 5:1 to 100:1 at up to 4.0 kW motor input supports heavy conveyor main drives at Australian bulk-handling terminals and mining-circuit retrofit applications where the original reducer is a heritage US-sourced unit. The 22.5 kg aluminium-housed assembly substantially reduces crane-handling weight compared to the cast-iron equivalent.
EPNRV110 Specifications
Full technical data for the EPNRV110 inch-series worm gearbox. Values verified at end-of-line dynamometer test and retained on serial-number record for five years. Non-standard shaft modifications including hybrid metric-keyway-on-inch-shaft configurations and food-grade lubricant fills are available on request through our engineering desk.
| Specification | Value |
|---|---|
| Model designation | EPNRV110 |
| Configuration | Single-stage worm reducer, inch-series (NEMA-compatible) |
| Centre distance | 110 mm |
| Rated output torque | 855 Nm |
| Reduction ratio range | 5:1 to 100:1 |
| Output shaft speed (4-pole 1,400 rpm input) | 14 – 280 rpm |
| Motor input power (max) | 4.0 kW |
| Output shaft diameter (solid) | 1-5/8″ (41.3 mm) |
| Output bore (hollow) | 1-5/8″ (41.3 mm) |
| Output keyway | 3/8″ square UNF |
| Output radial load capacity | 7920 N |
| Motor flange – NEMA C-face | 180TC / 210TC |
| Motor flange – IEC (where supported) | B5 |
| Mechanical efficiency (approximately) | 80 percent at mid-ratio |
| 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, food-grade available) |
| Shaft seals | Viton (FKM) double-lip seals |
| Ingress protection | IP55 (labyrinth upgrade available) |
| Fastener standard | UNF (Unified Fine Thread, SAE J429 grade 5/8) |
| Mounting positions | B3, B6, B7, B8, V5, V6 |
| Assembled weight | 22.5 kg |
Engineering Features of the EPNRV110
Six design characteristics that distinguish the EPNRV110 inch-series worm gearbox from generic metric-only alternatives, particularly relevant where the driven-equipment interface is inch-dimensioned or the installation runs North-American-specified motor and coupling hardware.
Viton Double-Lip Shaft Seals
Viton (FKM) double-lip seals at both input and output shafts. Continuous service rating to 200 degC continuous handles the elevated ambient temperatures inside enclosed motor cabinets and mining-equipment drive housings. Dust-protection lip on the output side prevents fines ingress in mining, grain-handling, and cement-industry applications.
IP55 Standard Ingress Protection
Standard IP55 ingress-protection rating, with labyrinth-seal output upgrade available for the most dust-intensive service in mining and grain-handling applications. Breather plug prevents internal pressure build-up during thermal cycling. Marine-grade paint system available for tropical-coastal bulk-terminal installations.
Six Mounting Orientations
Factory-supported mounting positions B3, B6, B7, B8, V5 and V6. Oil fill volume is factory-calibrated to the declared mounting orientation – vertical mounts (V5, V6) receive additional oil volume to ensure the worm-wheel engagement remains properly submerged at start-up.
100% End-of-Line Dynamometer Testing
Every unit is tested on a closed-loop dynamometer across the catalogue torque range. Noise measurement in a semi-anechoic booth, sump-temperature rise monitored during run-in, and output-shaft backlash verified against catalogue specification. Test record is retained per serial number for five years, with certificate of conformity issued per shipment.
Shared Inventory With NMRV Range
The internal worm-and-wheel gearing on the inch-series range is common with our NMRV metric-interface product. Field replacement of worn internal components can draw on the same spare-parts inventory. Mixed-standard Australian operations running both NMRV and NRV can stock a single set of replacement gearsets.
Stainless Fastener Upgrade Available
Stainless-steel UNF fastener upgrade available on request for food-processing, marine, and chemical-industry applications where the standard carbon-steel hardware would corrode in the operating environment. Upgrade is factory-fitted across all accessible external fasteners including mounting flange bolts and output-cover screws.
Typical EPNRV110 Applications Across Australia
The EPNRV110 is specified across five primary Australian industry sectors where North-American-origin equipment, inch-dimensional interfaces, or NEMA motor flanges drive the specification. Each industry below represents real retrofit and OEM-build deployments.
Mining & Minerals Processing
In mining and minerals-processing service, the EPNRV110 supports slow-speed feeder auxiliary drives, sampling-equipment reducers and conveyor take-up drives at Pilbara, Kalgoorlie and Central Queensland operations running US-sourced Caterpillar, Joy Global and similar heritage equipment. The inch output shaft with UNF keyway matches the drive-coupling hardware already present in the installation. Marine-grade paint and labyrinth-seal output upgrade are both specified as standard on NEMA-compatible units destined for tropical-coastal bulk-terminal installations, matching the operational envelope of heritage US-spec equipment.
Material Handling & Logistics
For material handling duty, the EPNRV110 drives roller-bed conveyors, palletiser-cell indexing units and accumulator buffers built to North American OEM specifications or retrofitted onto US-imported handling equipment at Australian DC operations. The inch output shaft with UNF keyway matches existing drive-pulley bushings and sprocket hardware already in service, making the EPNRV110 a straight-swap option where the incumbent reducer is an aging NEMA catalogue unit from a US supplier. NEMA C-flange motor interface accepts the 56C, 140TC and 180TC frames common in imported equipment.
Food & Beverage Processing
In food and beverage processing, the EPNRV110 is specified into US-imported production lines at Australian dairies, craft breweries and meat processors where the line builder originally supplied NEMA C-flange motors and inch-dimensioned drive hardware. Retrofitting the original reducer with a metric-dimensional unit typically requires expensive machine-frame rework. The EPNRV110 preserves the inch output shaft diameter, UNF keyway dimensions, and NEMA flange spacing of the incumbent, enabling a direct bolt-in substitution at scheduled shutdown without driven-equipment modification.
Environmental & Water Treatment
For environmental and water-treatment applications, the EPNRV110 drives screw-conveyor sludge transport, grit-classifier augers and slow-speed mixer reducers at municipal plants operating US-sourced or North-American-specified equipment. The IP55 aluminium-housed construction matches the corrosion and splash-resistance requirement of chlorination and chemical-dosing zones, while the inch-dimensioned output interface lets plant maintenance source replacement reducers without requalifying the full driven-equipment assembly – a meaningful advantage on aging infrastructure where the original OEM is no longer available.
Agriculture & Primary Production
For agricultural applications, the EPNRV110 drives feed-conveyor systems, irrigation-pump drives and grain-handling augers built on US-sourced agricultural implements at NT, Queensland and WA rural holdings. American-branded equipment from John Deere, Case IH and similar manufacturers traditionally specifies NEMA C-flange motors and inch output-shaft reducers. The EPNRV110 is a directly compatible replacement for aging OEM reducers where the original equipment is still in service but the supplier-support chain has become unreliable.
How to Specify the EPNRV110 Correctly
The inch-series specification is driven by three interface-compatibility checks in addition to the standard torque-ratio-power verification: output shaft dimension and keyway geometry, motor flange standard, and mounting-footprint compatibility with any retrofit incumbent. Our engineering desk verifies all three against the customer-supplied drawings or photos of the installation before issuing a sizing recommendation.
1. Confirm Torque and Ratio
Required output torque falls within the 855 Nm rating of the EPNRV110. Ratio range 5:1 through 100:1 covers output speeds from 14 – 280 rpm at a 4-pole input motor.
2. Verify Shaft Interface
Output shaft is 1-5/8″ diameter with 3/8″ square UNF keyway. Verify against the incumbent drive-coupling hub bore and keyway before ordering. Hybrid configurations are available on request.
3. Check Motor Flange
NEMA C-flange compatibility: 180TC / 210TC. IEC option: B5. Motor input capacity 4.0 kW maximum. Specify motor standard and frame size at quotation.
EPNRV110 Technical Questions
The most common technical questions our engineering desk receives on the EPNRV110 inch-series worm gearbox from Australian specifiers, OEM design engineers, and plant maintenance teams working with US-sourced or NEMA-specified equipment.
Do you offer NMRV to NRV conversion support for mixed-fleet operations?
Yes. Our engineering desk routinely assists Australian operations with mixed-standard installations (some driven equipment metric, some inch) by verifying the best reducer fit for each drive point against the installed hardware. The NMRV internal gearing is common with the NRV inch-series range, so field spare-parts inventory can be minimised through the single internal-components stock list supporting both product families.
Why specify the EPNRV110 over the equivalent NMRV metric frame?
Choose the EPNRV110 when the driven-equipment interface is inch-dimensioned – output shaft diameter, keyway geometry, mounting-pattern spacing – or the motor available is NEMA C-flange. Common triggers include: retrofitting US-sourced equipment, building OEM machinery for North American export, or matching legacy in-service reducers from Boston Gear, Winsmith, Textron or similar US-market brands. If the interface is fully metric, the NMRV equivalent is generally the simpler specification.
What output shaft dimension does the EPNRV110 provide?
The EPNRV110 output shaft is 1-5/8″ (41.3 mm) on the solid-shaft version, with a matching 1-5/8″ hollow-bore option. Keyway geometry is 3/8″ square UNF to standard inch conventions. The dimensional envelope is matched to equivalent-frame NEMA catalogue reducers from major US-market suppliers for direct bolt-in retrofit compatibility.
Can I use an IEC metric motor with the EPNRV110?
Yes. The smaller frames (EPNRV110 025, 030, 040, 050) support both NEMA C-flange and IEC B5/B14 metric flanges through different mounting adapter plates, supplied with the reducer when specified at order. Larger frames primarily support NEMA, with IEC B5 available on request. Specify motor flange standard and frame size at quotation to ensure the correct adapter ships with the unit.
What motor power is typical for the EPNRV110?
The EPNRV110 accepts input power up to 4.0 kW through the NEMA C-flange interface. Actual motor selection is driven by the duty torque, operating rpm, and service factor rather than the catalogue maximum. Our engineering desk will verify motor sizing against the customer-supplied duty profile during quotation, including motor-sizing recommendations from Australian-stocked NEMA three-phase motor ranges.
Is the EPNRV110 dimensionally compatible with Boston Gear or Winsmith catalogue units?
The EPNRV110 external mounting footprint, shaft height, and output-shaft-to-mounting-surface dimensions are matched to equivalent-frame NEMA catalogue reducers including the Boston Gear H-Series, Winsmith 900 series, and Textron catalogue equivalents. For direct retrofit verification on a specific in-service reducer, send the incumbent-unit dimensional drawings or photos to our engineering desk for comparative check before ordering.
What Engineers Say About the EPNRV110
Verified customer feedback from Australian and international engineering customers working with inch-dimensional specifications, US-sourced equipment retrofits, and NEMA motor-flange installations. Review text is paraphrased where necessary to protect commercial-in-confidence project detail.
Using the EPNRV110 on auxiliary pump-house equipment at petroleum-industry sites where NEMA motor standard is the norm. The inch-dimensional interface matches the in-service drive hardware directly, which eliminates the driven-equipment modification that a metric replacement would require. Elevated-ambient operational performance has been consistent across the first 14 months of deployment.
The EPNRV110 is deployed on heritage US-supplied mining-circuit equipment at our Andean project sites. Altitude and ambient-temperature swings stress the reducer-housing envelope and the aluminium-housed construction has handled the operating conditions well through the first full service season.
Stocking the EPNRV110 for the Southeast Asian market where US-specified heritage equipment is common in petroleum, mining, and cement-industry installations. Customer retrofit-project uptake has been encouraging and the supply-reliability across our 10-month stocking period has been consistent with our volume forecasts.
Qualified the EPNRV110 into our current conveyor-product platform after a multi-month engineering evaluation against our US-catalogue incumbents. NEMA flange and inch-output-shaft compatibility with our established supply-chain hardware made the transition operationally straightforward. Manufacturer documentation and factory-test records exceeded our QA-audit requirements.
The EPNRV110 addresses a cost-competitive alternative to our incumbent US-catalogue reducer on the entry-level product line. Inch-dimensional interface with UNF keyway output matches our established driven-equipment hardware stack. Build-quality consistency across production batches has been reliable across the first year of volume supply.
Related Inch-Series Configurations
Three related inch-series frames across different torque and shaft-dimension envelopes. If the EPNRV110 is close but not exactly matched to your installation, the alternatives below may provide a better interface fit.
Browse the full NRV inch-series range or compare with the NMRV metric equivalents.
Ready to Specify the EPNRV110?
Send your incumbent-reducer dimensional drawings, photos, or OEM part numbers to our Australian engineering desk for a direct retrofit compatibility check. Technical enquiries are handled by the engineer responsible for the product, not a generic sales desk.
