Description
EPNMRV110 Worm Gearbox — Product Overview
The EPNMRV110 steps firmly into heavy-duty territory with a 110 mm centre distance, 35 kg housing, and rated output torque up to 855 Nm. This single-stage worm gearbox is specified by Australian construction, infrastructure, and heavy-industrial OEMs for concrete batching-plant agitators, cable-drum winches, hoist drives, quarry screening units, and heavy stirrer-mixer drives. Unlike the smaller EPNMRV090, the EPNMRV-110 supports 140TC, 180TC, and the larger 210TC NEMA motor flanges — necessary once motor powers pass 3 kW and the bolt-pattern reach of the smaller flanges becomes a mechanical-strength bottleneck. With eight standard ratios from 7.5:1 to 50:1, a 1.625″ output shaft and matching hollow bore, plus a 9,232 N radial-load rating, the EPNMRV110 is the reducer Australian project engineers reach for when cast-iron alternatives would add cost, freight, and crane-lift complexity without delivering a measurable performance advantage.
Lead application focus: concrete batching plants and heavy-duty hoists in the Heavy Construction & Infrastructure sector across the Australian industrial market.
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Technical Specifications — EPNMRV110
Dimensional reference and mechanical rating data for the EPNMRV110 worm gearbox. Refer to the dimensional drawing below for full installation dimensions; all measurements are nominal and confirmed to our factory QA drawings.
Fig. Dimensional drawing — EPNMRV110 with standard output flange
| Specification | Value |
|---|---|
| Model | EPNMRV110 |
| Product Family | EPNMRV Single-Stage Worm Gearbox |
| Housing Material | Die-Cast Aluminium Alloy (ADC12) |
| Centre Distance | 110 mm |
| Weight (without motor) | 35.0 kg |
| Output Bore (hollow) | 1.625″ (H7 tolerance) |
| Output Shaft (solid) | 1.625″ keyed |
| Input Shaft | 1.125″ keyed |
| Available Reduction Ratios | 7.5, 10, 15, 20, 25, 30, 40, 50:1 |
| Maximum Rated Output Torque | 855 Nm |
| Maximum Input Power | 5.5 kW @ 1400 rpm |
| Maximum Radial Load (Fr2) | 9232 N |
| NEMA Input Flange Options | 140TC, 180TC, 210TC |
| Mounting Positions | B3 / B6 / B7 / B8 / V5 / V6 |
| Worm Shaft Material | Case-Hardened 20CrMnTi Alloy Steel, Ground |
| Worm Wheel Material | Tin-Bronze CuSn12 Centrifugal Casting |
| Lubrication | Synthetic PAG Gear Oil (ISO VG 320 Standard) |
| Protection Rating | IP55 Equivalent |
| Ambient Temperature Range | -10 °C to +40 °C (extended range optional) |
| Output Flange Options | FA / FB / FC / FD (model-dependent) |
| Shaft Configuration | Hollow Bore / Single Solid / Double Solid |
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Core Features & Benefits of the EPNMRV110
Every feature of the EPNMRV110 worm gearbox has been engineered to address the specific demands of Australian industrial operators — from coastal humidity and inland dust through to continuous-duty thermal loads.
Heavy-Duty 855 Nm Torque Rating
Built for the punishing continuous-duty loads of concrete batching plants, aggregate-sorting equipment, and cable-drum winches on Australian infrastructure projects.
Reinforced Casing for Impact Loads
Thicker-wall EPNMRV110 housing plus upsized output-shaft bearings handle start-stop shock loads delivered by concrete-mixer reversals and crushed-stone feeder screws.
Large-Frame NEMA Flange Compatibility
140TC, 180TC, and 210TC flanges accept motor powers from 1.1 kW to 5.5 kW — sized for the three-phase motors common on Australian construction sites.
Eight Field-Proven Ratios
Ratios from 7.5:1 to 50:1 provide the right speed-torque curves for hoist drives, winches, and heavy stirrer drives — without excess over-reduction.
Large Surface-Area Cooling Fins
Extended aluminium finning on the EPNMRV-110 extracts heat during continuous-duty operation in enclosed site huts and covered batching plants.
9,232 N Radial Load Capacity
Carries overhung sprocket and drum-wind loads without the need for external pillow-block bearings — saving both cost and installation time.
Every EPNMRV110 unit is machined, assembled and factory-tested before shipment
Industry Applications — Where the EPNMRV110 Excels
The EPNMRV110 worm gearbox has been specified into thousands of Australian installations across these five primary industry segments. Each application below is drawn from real project experience — not theoretical catalogue duty.
Mining & Minerals Processing
The EPNMRV110 drives heavy feed conveyors at primary crushers, screen-deck tensioning mechanisms, and large flotation-cell agitators. Its 855 Nm rated torque and 9,232 N radial-load capacity make it a reliable heavy-duty worm gearbox for mineral processing applications.
Heavy Material Handling & Logistics
Port bulk-handling reclaimer boom-slew drives, long-haul conveyor head pulleys, and heavy pallet-stacker hoist reducers use the EPNMRV-110 in applications where motor powers up to 5.5 kW are required.
Environmental & Water Treatment
Large municipal clarifier centre drives in Australian metropolitan water-treatment plants, heavy belt-press pinch rollers, and sludge-thickener rake drives specify the EPNMRV110 for its high torque and corrosion-resistant aluminium construction.
Agriculture & Primary Production
Large feed-mill pellet-press auxiliary drives, cotton-gin auxiliary reducers, and grain-terminal ship-loader auxiliary gearboxes use the EPNMRV-110 where its high continuous-torque capacity is essential.
Food & Beverage Processing
Large-capacity dough mixers, meat-abattoir rail drives, and multi-head bottling carousel mains reducers use the EPNMRV110 in heavy-duty food-processing environments.
Selection Guide & Comparison
Sizing the EPNMRV110 for Your Application
Correct sizing starts with two core parameters: required output torque (M2) and required input power (P1). Follow this three-step process when selecting the EPNMRV110:
- Identify required output speed (n2) — this determines your reduction ratio (i). The EPNMRV110 offers ratios from 7.5:1 to 50:1.
- Calculate required torque with service factor — multiply theoretical torque by an appropriate service factor (1.0 for steady duty, 1.5–2.0 for shock loads, 2.0–2.5 for reversing duty).
- Verify radial-load capacity at the output shaft — overhung sprocket or pulley loads must not exceed 9232 N measured at the shaft midpoint for the EPNMRV110.
Contact our engineering desk at sales@nmrv-gearbox.xyz with your application parameters for a free sizing verification.
Mounting Position Reference (B3 / B6 / B7 / B8 / V5 / V6)
The EPNMRV110 supports six standard mounting orientations. Each orientation affects the required lubrication charge and plug positioning — specify the correct orientation at time of order:
| Position | Orientation | Typical Oil Charge |
|---|---|---|
| B3 | Horizontal shaft, foot mount (standard) | Standard reservoir fill |
| B6 | Horizontal shaft, wall mount left | Standard reservoir fill |
| B7 | Horizontal shaft, wall mount right | Standard reservoir fill |
| B8 | Horizontal shaft, foot mount inverted | Standard + 10% fill |
| V5 | Vertical shaft downward | Increased fill (+25%) |
| V6 | Vertical shaft upward | Increased fill (+25%) |
Incorrect oil fill for a given mounting orientation is the leading cause of premature worm-wheel wear in the first 1,000 service hours — specify correctly at order time to avoid this.
EPNMRV110 (Aluminium) vs Traditional Cast-Iron Worm Reducers
Australian buyers consistently choose aluminium-body worm reducers over cast-iron legacy units for five measurable reasons:
| Attribute | EPNMRV110 Aluminium | Traditional Cast-Iron |
|---|---|---|
| Weight (equivalent size) | 35.0 kg | ~98.0 kg (approx 2.5–3× heavier) |
| Corrosion Resistance | Excellent — aluminium forms passive oxide layer | Requires active paint maintenance |
| Heat Dissipation | 3–4× better thermal conductivity | Limited — relies on surface area alone |
| Installation Handling | Single-person installation in many cases | Typically requires lifting aid even at small sizes |
| Freight Cost | Lower — reduced airfreight weight | Higher per-unit airfreight charges |
| Price Point | Generally 15–30% lower than cast-iron | Premium legacy pricing |
Frequently Asked Questions — EPNMRV110
Answers to the questions most commonly raised by Australian engineers and procurement buyers specifying the EPNMRV110 worm gearbox.
❓ Can the EPNMRV110 drive a cable-drum winch continuously?
Continuous-duty winch applications require careful thermal sizing. The EPNMRV-110 rated 855 Nm output is achievable continuously provided motor input is matched to the catalogue curve and ambient stays below 40 °C. For duty cycles heavier than 60% in an enclosed site hut, specify the optional fan-cooling unit.
❓ Which NEMA flanges does the EPNMRV110 accept?
The EPNMRV-110 accepts 140TC, 180TC, and 210TC NEMA motor flanges — covering three-phase motor powers from approximately 1.1 kW up to 5.5 kW at 1400 rpm input. IEC 90B5, 100B5, and 112B5 frames are also supported. 56C NEMA is not available at this size.
❓ What is the EPNMRV-110 output shaft diameter?
The standard output shaft diameter is 1.625″ (41 mm) for both solid-shaft and hollow-bore variants. The shaft is parallel-keyed per ANSI B17.1; metric keyways (8×7) are also available as a factory option on the hollow-bore variant. Specify at order to ensure correct key supply.
❓ Can the EPNMRV110 be wall-mounted?
Yes — both B6 (wall-mount, horizontal shaft left) and B7 (wall-mount, horizontal shaft right) are supported. At 35 kg installed weight, we strongly recommend mounting to a cast or welded-steel backing plate rather than thin sheet metal. Confirm wall substrate rating before installation.
❓ What oil change interval should I plan for?
Factory synthetic oil charge is rated for 15,000–20,000 service hours under normal duty. In high-ambient Australian mining or construction sites routinely exceeding 45 °C, plan a mid-life oil replacement at 10,000 hours using the same synthetic PAG spec. Oil drain and fill plug positions are clearly marked on the housing.
❓ Is the EPNMRV-110 suitable for high-humidity coastal installations?
Yes, with the marine-grade paint option. The aluminium body itself resists atmospheric corrosion, but the steel fasteners and input shaft need protection in coastal air. We include stainless M10 fasteners and a sealed input-shaft boot as part of the marine-grade spec.