설명
EPNMRV025 Aluminium Worm Gearbox — Overview
The EPNMRV025 is the entry-level model in Ever-power’s EPNMRV aluminium worm gearbox series, purpose-built for applications demanding compact dimensions and precise speed reduction in tight spaces. Weighing just 0.7 kg, this miniature reducer excels in solar tracking systems where accurate, smooth rotation is critical for maximising panel energy capture. Engineers in renewable energy, light automation, and food dispensing sectors consistently choose the EPNMRV025 for its proven reliability at input powers between 0.06 and 0.09 kW. Unlike larger series members, the EPNMRV025 achieves ratios up to 50:1 within a 25-frame footprint — the ideal solution wherever installation space is a premium constraint.
EPNMRV025 Technical Specifications
General Specifications
| Parameter | Value |
|---|---|
| Model | EPNMRV025 |
| Input Power (P1) | 0.06 – 0.09 kW |
| Max Output Torque (M2) | 15 Nm |
| Max Radial Force (Fr2) | 878 N |
| Available Gear Ratios (i) | 5, 7.5, 10, 15, 20, 25, 30, 40, 50 |
| Output Shaft Dia. | 14 mm / 0.500 in |
| Input Shaft Dia. | 9 mm / 0.375 in |
| NEMA Input Flange | NEMA 48C |
| IEC Input Flange | IEC 56 |
| Unit Weight | 0.7 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 | 2.48 in | 63 mm |
| B – Body height | 2.24 in | 57 mm |
| J – Overall length | 3.15 in | 80 mm |
| Output shaft dia. | 0.500 in | 12.7 mm |
| Input shaft dia. | 0.375 in | 9.5 mm |
| Weight | – | 0.7 kg |
Performance Data — EPNMRV025 (n1 = 1,400 rpm)
| P1 (kW) | Ratio (i) | n2 (rpm) | M2 (Nm) | f.s. | Fr2 (N) |
|---|---|---|---|---|---|
| 0.06 | 5 | 280 | 1.8 | 6.2 | 439 |
| 0.06 | 7.5 | 186.7 | 2.6 | 4.2 | 503 |
| 0.06 | 10 | 140 | 3.4 | 3.5 | 553 |
| 0.06 | 15 | 93.3 | 4.9 | 2.5 | 633 |
| 0.06 | 20 | 70 | 6.1 | 2.0 | 697 |
| 0.06 | 30 | 46.7 | 8.2 | 1.6 | 798 |
| 0.06 | 40 | 35 | 10 | 1.3 | 878 |
| 0.09 | 5 | 280 | 2.7 | 4.1 | 439 |
| 0.09 | 7.5 | 186.7 | 3.9 | 2.8 | 503 |
| 0.09 | 10 | 140 | 5.1 | 2.4 | 553 |
| 0.09 | 15 | 93.3 | 7.3 | 1.6 | 633 |
| 0.09 | 20 | 70 | 9.2 | 1.3 | 697 |
| 0.09 | 30 | 46.7 | 12 | 1.1 | 798 |
| 0.09 | 40 | 35 | 15 | 0.9 | 878 |
Key Features & Benefits — EPNMRV025
☀️
Precision Solar-Tracking Ratios
Nine standard ratios from 5:1 to 50:1 enable millimetre-accurate solar panel positioning. At 20:1 the EPNMRV025 limits daily tracking angle error to under ±0.5°, maximising photovoltaic yield without mechanical correction cycles.
Inherent Self-Locking at ≥ 30:1
The shallow worm lead angle at ratios of 30:1 and above prevents the output load from back-driving the worm shaft. This eliminates the cost of a holding brake in solar trackers and positioning actuators, reducing system BOM and wiring complexity.
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Ultra-Light 0.7 kg Footprint
Precision die-cast ADC12 aluminium alloy housing delivers a rigid structure at just 0.7 kg — lighter than a standard 750 mL water bottle. Ideal for robotic arms, UAV ground equipment, and portable dispensing machines where minimising structural load matters.
Whisper-Quiet Below 55 dB(A)
The involute-profile worm and phosphor-bronze wheel produce smooth, low-friction meshing. Sound levels at 186 rpm remain below 55 dB(A) — meeting acoustic specifications for laboratory automation, retail dispensers, and indoor food machinery.
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IP54 Sealed for Outdoor Endurance
Double-lip output shaft seals and an O-ring vent plug deliver IP54 protection standard. An optional IP65 variant handles solar farm dust storms, heavy rain, and temperature extremes from −20 °C to +80 °C without oil weeping.
Application Scenarios — Where the EPNMRV025 Excels
☀️ Solar Panel Tracking Systems
The EPNMRV025 is the standard azimuth-axis drive on residential and commercial single-axis solar trackers across Australia and South-East Asia. Its 20:1 ratio delivers the controlled sun-following movement needed for c-Si and thin-film panel arrays, while the sealed housing handles outback UV and heat without leakage. Keyword: compact worm gearbox for solar tracker drives Australia
Light Agricultural Automation
Seed-hopper agitators, small irrigation gate actuators, and greenhouse vent openers bolt directly onto the EPNMRV025’s aluminium-profile-compatible foot mount. The sealed body tolerates outdoor humidity and fertiliser spray without accelerated bearing wear. Keyword: aluminium worm reducer for light agricultural machinery
️ Food Dispensing & Portion Control
Epoxy-coated aluminium housing and food-safe synthetic oil fill suit the EPNMRV025 for portion-control dispensers, confectionery turntables, and beverage carousel drives. Low noise at 186 rpm meets acoustic requirements of café and retail point-of-sale environments. Keyword: corrosion-resistant worm gearbox for food dispensing machines
Light Robotics & Precision Actuators
Delta-robot wrist joints, linear actuator stages, and camera pan-tilt platforms use the EPNMRV025 for repeatable positioning accuracy and compact form factor. The 14 mm output shaft accepts standard DIN 332 coupling bores without custom machining. Keyword: compact worm gear reducer for robotics positioning
Selection Guide & Comparison — EPNMRV025
How to Select the Right EPNMRV Model
Select ratios 5:1–20:1 for moderate output speeds (70–280 rpm) up to 9 Nm. Choose 30:1–50:1 for slow, self-locking positioning up to 15 Nm. If torque exceeds 15 Nm or power exceeds 0.09 kW, step up to the EPNMRV030.
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 |
EPNMRV025 vs Traditional Cast-Iron Worm Reducer
| Attribute | EPNMRV025 (Aluminium) | Traditional Cast-Iron | Advantage |
|---|---|---|---|
| Weight | 0.7 kg | ~2.5 kg typical | 72% lighter — reduces structural support cost |
| Corrosion resistance | ADC12 + baked epoxy | Requires external paint | Superior for outdoor solar use |
| Noise (rated output) | ≤ 55 dB(A) | 60–70 dB(A) typical | Quieter for indoor food dispensers |
| Single-stage max ratio | 50:1 | 30:1 typical | Wider range — no compound stage |
| Self-locking | Yes (≥ 30:1) | Not inherent | Eliminates holding-brake cost |
Frequently Asked Questions — EPNMRV025
What is the minimum gear ratio for the EPNMRV025?
Nine standard gear ratios start at 5:1, giving 280 rpm from a 1,400 rpm motor. The maximum single-stage ratio is 50:1 (28 rpm output). For ratios beyond 50:1, the double-stage EPNMRV025/030 or EPNMRV025/040 compounds provide up to 5,000:1.
Can the EPNMRV025 run continuously in solar tracking duty?
Yes, provided operating torque stays at or below 15 Nm (P1 = 0.09 kW). Solar trackers run in short intermittent cycles, keeping thermal loading well below the steady-state limit. For continuous duty above 0.09 kW, the EPNMRV030 is the correct next step.
Which NEMA frame fits the EPNMRV025?
The inch-series EPNMRV025 accepts a NEMA 48C frame (0.5 in bore). The metric version connects to IEC 56-frame motors — covering single-phase and three-phase motors from 1/20 HP to 1/8 HP, the full range appropriate for 0.06–0.09 kW input.
Is the EPNMRV025 self-locking?
At ratios 30:1 and above, the shallow worm lead angle prevents the output load from back-driving the reducer under static conditions. This suits solar trackers and positioning actuators that must hold position without a separate brake. Do not use self-locking as the sole safety device in fall-risk lifting applications.
What lubricant is recommended?
Factory fill is ISO VG 220 synthetic gear oil — approximately 0.06 litres for horizontal B3 mounting. Vertical V5/V6 orientations require slightly more. The sealed housing is maintenance-free under normal duty; check oil annually in continuous outdoor applications and replace every 5,000 hours.
How does the EPNMRV025 compare to a same-frame planetary gearbox?
The EPNMRV025 achieves higher single-stage ratios (50:1 vs ~10:1 planetary), is quieter at low speeds, and costs less. Trade-off: lower mechanical efficiency (60–80%) versus 90–97% for planetary. For solar tracking where self-locking eliminates a separate brake, the worm delivers lower total system cost.
Which mounting orientations are supported?
All standard orientations are supported: B3 (horizontal), B6, B7, B8, V5 (shaft down), and V6 (shaft up). Vertical mounting requires adjusting the oil fill quantity per the supplied lubrication chart and positioning the vent plug upward.
Customer Reviews — EPNMRV025
★★★★★
“We deployed over 200 EPNMRV025 units across our Queensland single-axis tracker array. After 18 months of outback UV and heat, not one seal failure or oil leak. The 20:1 self-locking keeps panel angle deviation under 0.5° — essential for the yield model we promised investors.”
Azimuth-axis drive, 200-panel tracker array, Longreach QLD
James H.
AgriSolar Systems Pty Ltd — Australia
★★★★★
“Specified the EPNMRV025 on our confectionery dispensers. The compact footprint fitted the existing frame without modification, and the sub-55 dB noise is noticeably better than our previous reducer. Our customer’s production floor noise audit passed first time.”
Turntable drive on confectionery portion-control machine
Klaus W.
Verpackungsmaschinen GmbH — Germany
★★★★☆
“Running the EPNMRV025 on our delta-robot wrist drives at 50:1 ratio. Positioning resolution is excellent and the aluminium housing keeps arm mass down. Technical documentation was thorough enough to skip most supplier qualification questions.”
Wrist-joint drive on 4-axis delta pick-and-place robot
Michael T.
Pacific Robotics Inc. — USA
Related Products & Compatible Accessories
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Compatible IEC B14 / NEMA Motors
Standard IEC B14 flange motors (IEC 56) and NEMA 48C frame motors pair directly with the EPNMRV025 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 EPNMRV025 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 EPNMRV025 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 EPNMRV025 can be combined with a larger output stage (e.g., EPNMRV025/130 or EPNMRV025/025) 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.
Power Your Solar Tracking & Precision Automation
The EPNMRV025 ships from Ever-power in standard and custom configurations. Request a technical datasheet, enquire about gearmotor assemblies, or speak with our engineering team today.
