Planetary Gearbox for Precision Agriculture — Seeders, Spreaders, Greenhouse Robots & Autonomous Farming

38%
Motor Current Saving vs. Worm
≥97%
Efficiency — EP-FPG Economy
IP65
Fertiliser & Dust — Every Unit
−10°C
Min Temp — NYOGEL Cold Climate
20,000hr
Design Life — EP-FPG S5
C1–C10
Universal Motor Adapter

Engineering Context

Why Agricultural Environments Demand More from Economy Gearboxes Than Any Other Industry

EP-FPG economy planetary gearbox on precision agricultural seeder drive — IP65 fertiliser corrosion resistant 38% lower motor current vs worm gearbox

Korea Ever-Power EP-FPG economy planetary gearbox — precision seeder metering drive. ≥97% efficiency vs ≤65% worm gear reduces motor current by 38% per drive point. IP65 for fertiliser and soil dust environments. CASTROL LMX sealed lifetime fill for 0°C to +90°C operating range.

Precision agriculture presents a paradox that gearbox engineers rarely encounter in other industries: the application demands economy-tier pricing (high unit counts, price-sensitive OEM supply, thin margins on agricultural machinery) while simultaneously imposing environmental conditions more severe than those found in most industrial automation. A gearbox on a field seeder operates in a cloud of soil dust and fertiliser particulate, experiences diurnal temperature swings of 30–40°C, faces chemical exposure from ammonium nitrate and potassium chloride fertilisers that attack standard lubricants, and must survive 200 operational hours per season year after year without maintenance access.

The worm gearbox has been the default choice in agricultural machinery for decades — primarily because it is inexpensive and familiar. But the worm’s fundamental inefficiency (≤65% transmission efficiency) is a genuine problem at the scale of precision farming. A precision seeder may have 12–24 individual seed metering drives, each powered by a small servo motor through a gearbox. At ≤65% worm efficiency versus ≥97% planetary efficiency, the difference in motor current demand per drive point is 38% — documented in field installations where EP-FPG planetary gearboxes replaced worm gear units on a multi-unit seeder. On a 24-channel seeder running a 300 W motor per channel, this difference is 2.5 kW of total power consumption savings per machine, which translates directly to battery run time on autonomous electric tractors and generator load on conventional tractor PTO power systems.

The second agricultural differentiator is chemical exposure. Fertiliser residue — particularly ammonium nitrate and urea — is highly corrosive to zinc alloy housings and standard mineral-oil worm gearbox lubricants. CASTROL LMX synthetic grease in EP-FPG/FPGA is chemically inert to common fertiliser compounds at the operating temperature range (0°C to +90°C), and the IP65 sealed housing prevents ingress. The critical temperature constraint: CASTROL LMX has a 0°C lower operating limit. For cold-climate agricultural applications — Northern European or Canadian grain seeding where early spring soil temperatures are below 0°C — this requires the higher-specification NYOGEL 792D lubricant (rated to −10°C), available on request as a cold-climate option for EP-FPG/FPGA.

🌱
The Precision Agriculture BOM: Economy Drives and Precision Drives on the Same Machine
A modern autonomous greenhouse robot illustrates the full EP-series range on a single machine: the arm joints require EP-FAD P1 (±0.5 mm positioning for precise plant inspection and picking), the drive wheels use EP-FPG (≥97% efficiency, round housing press-fit into wheel hub), and the conveyor transfer between stations uses EP-FPGA (economy, flat-mount). Three different series, three different price tiers, all covered by a single C1–C10 motor adapter qualification for the same Yaskawa or Panasonic servo motor. This is the procurement logic that makes Korea Ever-Power the correct single-supplier choice for precision agriculture OEMs building across the full precision-to-economy spectrum.

Agricultural Deployment Environment Severity Matrix — Temperature, Chemical, IP, and Lubricant Constraints

Agriculture is the only industry where operating temperature range creates a hard lubricant constraint that can eliminate a standard product option. The matrix below maps six agricultural deployment environments against six selection parameters — including the critical CASTROL LMX vs. NYOGEL 792D choice that cold-climate applications must address before other specifications are considered.

Deployment
Environment		 Ambient Temp
Range		 Chemical / Dust
Exposure		 Minimum
IP Class		 Cold-Start
Lube Constraint		 Shock /
Vibration		 EP-Series
Recommendation		 Typical Machine
Open Field
Temperate climate
Spring–Autumn
0°C to +45°C
CASTROL LMX suitable
HIGH
Soil dust; fertiliser (NH₄NO₃, KCl); pesticide spray
 IP65
None
CASTROL LMX 0°C limit not triggered
MEDIUM
Field vibration; occasional stone impact
EP-FPG P2
CASTROL LMX std
 Seeder; spreader; sprayer
Cold Climate
N. Europe / Canada
Early spring seeding
−20°C to +35°C
Below CASTROL LMX limit!
HIGH
Frozen soil dust; de-icing salt; fertiliser
 IP65
⚠ CRITICAL
CASTROL LMX fails below 0°C
→ must specify NYOGEL 792D
HIGH
Frozen ground impact; thermal shock
EP-FPG P2
NYOGEL 792D required
 Cold-climate seeder; winter spreader
Greenhouse /
Protected Crop
Year-round
+5°C to +40°C
CASTROL LMX suitable; high humidity
MEDIUM
Pesticide spray; high humidity; plant material
 IP54
None
Controlled environment
LOW
Smooth structure; no field vibration
EP-FAD P1
Low noise; precision robot
 Greenhouse robot; harvesting arm; hydroponic transfer
Livestock /
Barn Automation
Year-round
0°C to +35°C
CASTROL LMX suitable
MEDIUM-HIGH
Ammonia gas; manure; hygiene washdown
 IP65
None
Min ambient above 0°C typical
LOW-MED
Vibration from animal contact; washdown pressure
EP-FPG/FPGA
IP65 wash; economy
 Milking robot; feed dispenser; barn ventilation
Aquaculture
Fish farm / shellfish
−5°C to +30°C
Near CASTROL LMX lower limit in cold regions
SEVERE
Saltwater spray; fish meal; high humidity
 IP65
MONITOR
Cold ocean regions: NYOGEL 792D recommended below 0°C
LOW
Steady operation; no field impact
EP-FPG P2
Salt-resistant IP65
 Automated fish feeder; net hauler; water circulation
Autonomous Field
Robot / Drone
Multi-environment
−10°C to +50°C
Wide range; specify lube by deployment region
HIGH
All field chemicals; UV; rain; mud
 IP65
REGION-SPECIFIC
Below 0°C: NYOGEL 792D
Above 0°C: CASTROL LMX
MEDIUM-HIGH
Terrain vibration; actuation impact
EP-FPG
Compact; efficient; lube by region
 Autonomous tractor; drone; scout robot

Temperature ranges are representative; actual site conditions vary by geography and season. CASTROL LMX lower operating limit: 0°C. NYOGEL 792D lower operating limit: −10°C. For applications below −10°C, contact Korea Ever-Power application engineering for cold-climate lubrication options. IP65 classification per IEC 60529. Chemical resistance of housing and seals should be confirmed for specific agricultural chemical formulations.

Application Scenarios

Six Precision Agriculture Applications — Engineering Rationale and Environment-Matched Specifications

From high-volume economy drives on field equipment to precision robot axes in protected horticulture, the six scenarios below cover the agricultural servo drive applications where planetary gearboxes deliver measurable advantages over worm gear alternatives — and where the environment severity matrix above determines which lubricant specification applies.

01 — Precision Field Seeder Metering Drive
Seed count precision — variable rate application
EP-FPG P2
Frame 040–080 mm
38% less current

Precision seeders use individual servo drives on each row unit to implement variable rate seeding — adjusting seed population to a prescription map as the machine crosses soil management zones. Each row unit has one metering drive, and a 12-row seeder has 12 drives. The planetary efficiency advantage (≥97% vs ≤65% worm) multiplies directly: 38% lower current per drive means the tractor’s PTO alternator or the machine’s own battery pack delivers measurably more operating time per charge cycle. The ≤5 arc-min P2 backlash grade provides sufficient positioning accuracy for closed-loop seed count feedback at all practical seeding rates. IP65 is mandatory: fertiliser residue from in-furrow placement blocks in the same tool frame is corrosive to unprotected housings.

Environment: Open field; soil dust + fertiliser; IP65 mandatory. CASTROL LMX for temperate climates; specify NYOGEL 792D if seeding starts below 0°C ambient. C1–C10 adapter standardises motor across all row units.

02 — Fertiliser Spreader Disc / Metering Drive
Variable-rate application — granular and liquid
EP-FPG / FPGA
Frame 040–080 mm
Salt-corrosion IP65

Fertiliser spreader metering drives operate in the most chemically aggressive environment of any agricultural drive application: direct exposure to ammonium nitrate, urea, and potassium chloride granules, which are hygroscopic and highly corrosive to zinc alloy and standard mineral-oil lubricated gearboxes. EP-FPG/FPGA with CASTROL LMX sealed synthetic grease is inert to these chemical compounds within the operating temperature range. The square-housing FPGA mounts flat on the spreader frame without an adapter bracket; the round-housing FPG integrates into metering disc hub bores. IP65 prevents fertiliser particle ingress that would accelerate internal corrosion. Economy pricing is critical for this application: a spreader OEM supplying large agricultural contractors may need 100–500 units per production run.

Environment: Direct fertiliser/salt chemical exposure; IP65 mandatory. CASTROL LMX chemically inert to common fertilisers. OEM volume pricing available from 50 units. C1–C10 for motor standardisation across machine variants.

03 — Sprayer Boom Folding / Tilt Axis
Boom angle positioning — precision spray application
EP-FPGA P2
Frame 060–090 mm
Vibration-tolerant

Self-propelled sprayer booms fold to a transport width of 3 metres and extend to working widths of 24–36 metres. The boom folding drives must position the boom sections accurately for field-edge turns and adjust the boom height dynamically to maintain canopy clearance. The operating environment is saturated with pesticide spray — droplets of herbicide, fungicide, and insecticide that attack exposed surfaces and standard mineral-oil lubricants. CASTROL LMX synthetic grease in EP-FPGA is rated for this chemical environment. The square housing mounts directly on the boom frame section without adapter hardware, and the P2 backlash (≤5 arc-min) provides the angular resolution needed for precise boom height control under closed-loop active levelling.

Environment: Pesticide spray saturation; IP65; vibration from boom oscillation; CASTROL LMX for standard climates. ≤5 arc-min P2 for boom height closed-loop control. Square housing for direct frame mount.

04 — Combine / Harvester Head Drive
Crop cutting and feeding — shock-load environment
EP-FPG P2
Frame 060–120 mm
Shock-tolerant helical

Combine harvester cutter heads and reel drives encounter significant shock loads when the machine moves from stubble to crop, when stones are encountered, or when the crop feed rate varies suddenly. Worm gearboxes under shock load fail at the worm wheel bronze gear teeth — the sliding contact geometry concentrates the shock energy at a single tooth engagement point. EP-FPG helical planetary gears distribute shock loads across three simultaneously-engaged planet gears, multiplying the effective contact area and significantly improving shock load tolerance. The economy pricing tier makes EP-FPG appropriate for OEM harvest machinery supply at the volumes and margins of combine head component procurement.

Environment: Open field; high shock loads (stones, dense crop); IP65; soil dust. Helical planetary 3× better shock distribution vs worm single-tooth contact. Economy OEM pricing. CASTROL LMX for temperate harvest seasons.

05 — Greenhouse Robot Arm Joints
Precision plant care, harvesting, and inspection
EP-FAD P1
Frame 060–090 mm
Low noise; 30,000 hr

Greenhouse harvesting and inspection robots — for tomatoes, cucumbers, sweet peppers, and ornamental plants — require ±0.5–1 mm positioning accuracy at the end effector to handle fragile fruit and navigate densely planted crop rows without damage. This demands ≤3 arc-min P1 backlash in the arm joint gearboxes. The greenhouse environment is controlled (0°C to +40°C), clean relative to field conditions, and noise-sensitive when operators work alongside the robot. EP-FAD P1 with helical gears provides low vibration (reduces fruit drop), ≤58 dB noise, and 30,000-hour design life at the continuous duty cycle of 2-shift greenhouse operation. Round-flange direct mount to the aluminium link casting.

Environment: Controlled greenhouse; pesticide spray IP54; ≤58 dB near operators; ≤3 arc-min for ±1mm end-effector; 30,000 hr for continuous crop cycle; NYOGEL 792D or CASTROL LMX both suitable.

06 — Autonomous Tractor Drive Wheel
Precision field navigation — electric drive platform
EP-FPG
Frame 080–120 mm
High-efficiency traction

Autonomous electric tractors and field robots use in-wheel or inline servo-gearbox drive units for each driven wheel. The traction drive gearbox is subject to all field environmental conditions (soil dust, water spray, fertiliser residue, temperature range) and must provide reliable traction force at high efficiency — the 38% motor current saving from planetary vs worm translates directly to battery run time per charge, which determines the field coverage area achievable per working day. The EP-FPG round housing press-fits directly into the wheel hub bore, eliminating the adapter bracket that is the primary maintenance item on conventional wheel drive assemblies. RTK-GPS guidance systems provide sub-centimetre field accuracy; the gearbox precision requirement (≤8 arc-min) is adequate for closed-loop wheel speed control.

Environment: All field conditions; IP65; round housing press-fit into wheel hub; ≥97% efficiency for battery range extension. Region-specific lube: CASTROL LMX for temperate, NYOGEL 792D for cold-climate deployments below 0°C.

Technical Specifications

EP-Series Precision Agriculture Specification — Environment-Matched Drive Matrix

The lubrication column below reflects the critical constraint from the environment severity matrix: CASTROL LMX for standard agricultural environments above 0°C; NYOGEL 792D required for cold-climate applications with operating temperatures below 0°C. Confirm the deployment region’s minimum ambient temperature before finalising the specification.

Machine / Drive Point Series Frame (mm) Backlash Ratio Max rpm IP Lubrication
(temp-dependent)		 Key Selection Reason
Precision seeder metering EP-FPG P2 040–080 ≤5 arc-min 10–50:1 3,000 IP65 LMX (≥0°C)
NYOGEL below 0°C		 38% lower current; 12–24 drives/machine; fertiliser IP65; C1–C10 motor std
Fertiliser spreader disc EP-FPG/FPGA 040–080 ≤8 arc-min 10–30:1 3,000 IP65 LMX (≥0°C)
NYOGEL below 0°C		 Salt/chemical corrosion resistance; OEM volume pricing; round or square housing
Sprayer boom fold/tilt EP-FPGA P2 060–090 ≤5 arc-min 10–30:1 2,000 IP65 LMX (≥0°C) Pesticide spray IP65; square housing frame mount; vibration-tolerant; boom height control
Harvester head drive EP-FPG P2 060–120 ≤5 arc-min 10–50:1 3,000 IP65 LMX (≥0°C) 3× better shock load vs worm; IP65; economy OEM harvest machinery pricing
Greenhouse robot arm ★ EP-FAD P1 060–090 ≤3 arc-min 10–30:1 4,000 IP54 LMX or NYOGEL
(both suitable)		 ±1mm end-effector; ≤58 dB near operators; 30,000hr continuous duty; low vibration
Autonomous tractor wheel EP-FPG 080–120 ≤8 arc-min 20–50:1 4,000 IP65 LMX (≥0°C)
NYOGEL below 0°C		 Round housing press-fit hub; ≥97% eff for battery range; all field conditions
Aquaculture feeder drive EP-FPG P2 040–060 ≤5 arc-min 10–20:1 2,000 IP65 LMX (≥0°C)
NYOGEL cold oceans		 Salt spray corrosion IP65; economy; low maintenance; long service interval
Livestock barn automation EP-FPG/FPGA 040–090 ≤8 arc-min 10–50:1 3,000 IP65 LMX (barn ≥0°C) Ammonia/manure IP65; washdown; economy; long service; flat mount on frame

★ CASTROL LMX lower limit: 0°C. For deployment at ambient below 0°C, specify NYOGEL 792D option — available on request for all EP-FPG/FPGA frame sizes. FPG: 20,000 hr S5; FAD: 30,000 hr S1. C1–C10 motor adapter applies to all series.

≥97%
FPG Efficiency
38%
Motor Current Saving
IP65
Every Unit Tested
−10°C
NYOGEL Cold Climate
20,000 hr
FPG S5 Life
C1–C10
All Series One BOM

Engineering Insight

Inside EP-FPG/FPGA — Why Economy Tier Still Outperforms Worm in Agricultural Environments

EP-FPG economy planetary gearbox internal structure — helical planet gears CASTROL LMX lubrication round housing for agricultural seeder and autonomous tractor drive

≥97%
Efficiency
3×
Shock Contact Area
IP65
Every Unit

EP-FPG: three helical planet gears in rolling contact. Each planet shares one-third of the input torque, tripling the contact area vs. a single worm-wheel tooth engagement. At shock loads, this load sharing prevents the concentrated tooth stress that causes worm wheel bronze failures in field conditions.

Four Reasons EP-FPG Outperforms Worm in Agricultural Conditions

The worm gearbox has three fundamental disadvantages in agricultural applications that a planetary design avoids — and these disadvantages accumulate in ways that make the unit price difference between worm and EP-FPG irrelevant when total operating cost is calculated over a machine’s service life.

  1. 01
    Efficiency — ≥97% Helical Planetary vs ≤65% Worm at Every Drive Point

    Worm gears transmit torque via sliding contact — a contact mode that converts 35%+ of input energy into heat. Planetary helical gears use rolling contact — a contact mode that converts less than 3% of input energy into heat. In agricultural machinery running on a tractor’s alternator output or an autonomous electric platform’s battery, this 32% efficiency difference per drive point determines how many hours of operation per tank of diesel or per battery charge cycle. On a 24-row seeder with 24 drive points, the total efficiency difference is a continuous 7.5 kW power demand reduction — enough to significantly extend autonomous platform range.

  2. 02
    Shock Load Tolerance — Three Planet Gears Share vs. Single Worm Tooth

    Worm gearboxes fail under shock loads because the entire transmitted torque passes through a single worm-wheel tooth engagement at any given moment. A stone in the crop row, a dense seed cluster in a metering disc, or a sudden torque reversal in a boom fold axis creates a peak contact stress at that single tooth that exceeds the bronze worm wheel’s yield strength — resulting in tooth shear. EP-FPG three helical planet gears engage simultaneously, distributing the shock torque across three contact zones: the effective peak contact stress at any one planet tooth is one-third that of the equivalent worm configuration. This three-to-one load sharing is the mechanical basis for the superior shock resistance of planetary gearboxes in field conditions.

  3. 03
    Chemical Resistance — CASTROL LMX Inert to Agricultural Chemicals

    Standard mineral-oil worm gearbox lubricants degrade when contaminated by ammonium nitrate, urea, and potassium chloride — the three most common fertiliser compounds. Even with an IP65 seal, microscopic seal wear over a season allows trace fertiliser infiltration that catalyses acid attack on mineral oil, producing corrosive by-products that attack both the lubricant and the bronze worm wheel. CASTROL LMX is a synthetic ester-based grease that does not react with these fertiliser compounds within the 0°C to +90°C operating range. The IP65 sealed housing prevents ingress — and the IP65 test on every EP-FPG/FPGA unit confirms that the seal performing the prevention is not a batch-sample qualification.

  4. 04
    Round Housing Press-Fit — Zero Adapter Bracket for Drive Wheel Integration

    The EP-FPG round housing outer diameter is machined to press-fit directly into a standard wheel hub bore — for an autonomous tractor wheel with an 80 mm hub bore, the FPG080 housing presses in without any adapter bracket. The adapter bracket that worm-motor packages require is the highest-maintenance item on agricultural drive assemblies: bracket bolts work loose from field vibration and shock, and the bracket-to-hub interface corrodes from fertiliser contact. Removing this bracket eliminates the maintenance interval, the failure mode, and typically 15–22 mm of drive unit axial protrusion beyond the wheel hub face.

Selection Guide

Agriculture Gearbox Selection Matrix — 5 Questions From Field to Specification

Agricultural gearbox selection begins with deployment environment and operating temperature, then moves to precision requirement and housing geometry. The lubrication question (Q3) is the critical cold-climate check that must be confirmed before any other specification is finalised — a standard CASTROL LMX unit operating below 0°C ambient will experience lubricant failure within the first cold-weather season.

Selection Question
Your Answer → Specification Implication
Action
Q1 — Precision required?
Open-loop position or closed-loop speed control (seeder, spreader, harvester, wheel drive) → EP-FPG/FPGA economy (≤5–8 arc-min adequate)  |  Precision robot arm (greenhouse, fruit picking, inspection) → EP-FAD P1 (≤3 arc-min, low vibration)  |  Never P0 for standard agricultural field machines — economy tier is correct
FPG or FAD
Q2 — Housing geometry?
Press-fit into wheel or metering hub bore → EP-FPG (round housing)  |  Flat-mount on machine frame face → EP-FPGA (square housing)  |  Flange-mount robot arm joint → EP-FAD (round bolt-circle flange)  |  Confirm hub bore diameter before ordering: FPG040 = 40 mm OD, FPG060 = 60 mm, FPG080 = 80 mm, etc.
FPG / FPGA
Q3 — ⚠ Min ambient temperature?
CRITICAL CHECK: Standard EP-FPG/FPGA uses CASTROL LMX (min 0°C). If minimum ambient operating temperature is below 0°C (cold-climate seeding, winter spreading, arctic deployment) → must specify NYOGEL 792D option (min −10°C) at order. CASTROL LMX below 0°C: lubricant viscosity becomes excessive → overload on motor startup → accelerated seal wear. Below −10°C: contact application engineering for specialist lubricant.
Confirm lube
Q4 — Chemical exposure?
Fertiliser (ammonium nitrate, urea, KCl) → IP65 mandatory; CASTROL LMX suitable for chemical inertness  |  Pesticide spray → IP65; CASTROL LMX stable to most agricultural chemical formulations  |  Saltwater / fish meal (aquaculture) → IP65; CASTROL LMX or NYOGEL both stable at typical aquaculture temperatures  |  Manure / ammonia gas (livestock) → IP65; wash-resistant seal
IP65 + LMX
Q5 — Volume / OEM pricing?
Standard stock items (FPG040–160, FPGA040–160, all standard ratios): 5–10 day delivery up to 50 units. OEM project (50+ units per frame size): contact Korea Ever-Power for volume pricing schedule with BOM. High-volume agricultural OEM (500+ units/year): request annual pricing agreement. C1–C10 adapter standardises motor qualification across all field machine product variants using the same servo motor brand.
OEM pricing

Manufacturing Quality

Korea Ever-Power Production — Why Economy Tier Still Means Every-Unit IP Testing in Agricultural Use

Korea Ever-Power test centre — IP65 pressure decay testing and backlash measurement for EP-FPG and EP-FPGA economy agricultural gearboxes
Korea Ever-Power precision gear manufacturing workshop — helical planetary gear grinding for EP-FPG economy agricultural gearbox series

Test centre (IP65 pressure decay and backlash — every unit) and gear manufacturing workshop, Korea Ever-Power, Ansan-si, Korea. Economy tier does not mean sample testing.

The argument for per-unit IP testing in the economy tier is, in agricultural applications, even stronger than in precision industrial applications. A precision CNC machine running in a factory has temperature sensors, vibration monitors, and maintenance technicians who detect an IP seal failure within days. A seed metering drive on a 24-row field seeder may run for an entire planting season — 200+ hours — before maintenance access. A gearbox with a marginal IP seal that passed a batch-sample test but fails in the field allows fertiliser compound to enter the gear chamber during one of the 200 hours of operation. By the time the machine is returned to the workshop after the season, the gear teeth are corroded and the unit requires replacement rather than inspection.

Korea Ever-Power applies the 60-second pneumatic pressure decay test to every EP-FPG and EP-FPGA unit — the same test applied to the precision EP-FAB/FAD series. This is a production process decision, not a specification upgrade: the cost of the test is built into the standard unit price and applies to every unit whether the order is one unit or 500 units. For a 24-drive seeder OEM ordering 24 units, this means 24 individually tested gearboxes, not a 24-unit batch with 2–3 tested and the rest shipped on statistical inference.

The backlash grade stamping on EP-FPG/FPGA applies the same logic to precision documentation: each unit’s backlash is measured and stamped (standard grade ≤8 arc-min, P2 grade ≤5 arc-min). This is not the same traceability level as the P0 precision series, but it is substantively better than the batch-sampling that Chinese worm gearbox competitors provide — and it supports the agricultural machinery OEM’s quality documentation for their own customers and regulatory compliance under European machinery safety directives.

🌾
Why Economy Tier Matters for Agricultural OEM Economics
EP-FPG/FPGA pricing is approximately 35–50% of the EP-FAB equivalent at the same frame size. For a 12-row precision seeder with 12 individual metering drives, the BOM cost difference between EP-FPG P2 and EP-FAB P1 at the same frame size is significant at the volumes and margins of agricultural machinery OEM production. The economy tier does not sacrifice efficiency (≥97%), shock resistance (3-planet load sharing), IP protection (every-unit IP65 test), or long service (20,000 hr S5, zero relubrication) — it trades precision grade (≤5 arc-min P2 vs ≤1 arc-min P0) in an application where ≤5 arc-min is fully adequate for closed-loop seed count control.

EP-FPG/FPGA vs. Worm Gearbox — Agricultural Application Comparison

Attribute Worm Gearbox
(Agricultural OEM typical)		 Korea Ever-Power
EP-FPG / EP-FPGA		 Field Impact
Efficiency ≤65% ≥97% 38% lower motor current; extended battery range on autonomous platforms; cooler motors in hot field conditions
Shock load tolerance Single tooth contact — bronze failure 3-planet 3× contact area Stone/obstacle impacts that shear worm wheel teeth absorbed by planetary load sharing
IP testing Batch sample ✓ Every unit — IP65 Eliminates marginal-seal failures during seasonal operation without maintenance access
Fertiliser chemical resistance Mineral oil degrades with NH₄NO₃ ✓ CASTROL LMX inert to ag chemicals No lubricant degradation from fertiliser ingress; longer service interval
Hub integration (wheel drive) Adapter bracket required ★ Round housing press-fit Eliminates adapter bracket vibration loosening — most common maintenance call on worm wheel drives
Cold-climate operation Mineral oil thickens rapidly below 0°C ✓ NYOGEL option to −10°C Cold-climate NYOGEL option prevents cold-start motor overload on early-spring seeding
Motor adapter system Motor-specific ✓ C1–C10 universal — all 8 series One motor qualification covers FPG seeder drives + FAD greenhouse robot on same machine

Korea Ever-Power does not sell counterfeit products. Comparative data based on publicly available specifications and documented field installation results. Chemical resistance data is indicative — specific agricultural chemical formulations should be confirmed against CASTROL LMX and NYOGEL 792D technical data sheets.

Customer Feedback

What Agricultural Machinery Engineers Say About EP-FPG and EP-FAD

★★★★★

“We make 24-row precision seeders for large-scale grain farming in the Canadian Prairies — early spring seeding at soil temperatures below 0°C is standard. We’d had chronic cold-start failures with worm gear metering drives: the mineral oil was too thick at −5°C and the motors would trip on overload on the first pass of the morning. Korea Ever-Power supplied EP-FPG P2 with NYOGEL 792D specified for our deployment region. Zero cold-start failures in two full planting seasons. The efficiency improvement was also measurable — our PTO power demand for the seeder drive system dropped noticeably, which the operator noticed as better tractor fuel economy on the header circuit.”

MR
McAllister R., Lead Engineer
Precision Seeder Manufacturer — Saskatchewan, Canada
★★★★★

“Our autonomous greenhouse harvesting robot uses EP-FAD P1 on the 4-joint arm and EP-FPG on the drive wheels. The C1–C10 adapter was the key insight — we qualified our Yaskawa motor once and it covers both the FAD precision arm joints and the FPG wheel drives. Before EP-series, we had two different adapter systems to stock and qualify. On the arm joints, the ≤58 dB noise level is important because our operators work alongside the robots during peak harvest; the robot isn’t intrusive. The FPG wheel drives have given us 14 months continuous operation without any maintenance — the sealed housing just works in the high-humidity, pesticide-spray greenhouse environment.”

VK
van Kleij M., Robotics Engineer
Greenhouse Automation OEM — Westland, Netherlands
★★★★★

“We supply fertiliser spreader drives to large European agricultural machinery OEMs — production volumes of 200–500 units per season. We switched from worm gear drives to EP-FPG after a series of failures traced to fertiliser corrosion attacking the worm wheel bronze. The CASTROL LMX in EP-FPG is inert to ammonium nitrate — we’ve had the same units running through two full seasons of heavy spread without any chemical attack on the gear teeth or housing. The round housing also press-fits directly into our spreader disc hub bore, eliminating the adapter bracket that was our most common warranty claim on the previous design. OEM pricing from Korea Ever-Power made the switch economically straightforward at our volumes.”

BF
Bauer F., Product Engineer
Agricultural Equipment Drive Supplier — Bavaria, Germany

Related EP-Series — Full Agricultural and Horticultural Coverage

Korea Ever-Power EP series planetary gearbox range — FPG FPGA FAD for agricultural machinery seeder spreader greenhouse robot autonomous tractor

Core agricultural series: EP-FPG/FPGA economy series for all field machine drives, wheel drives, and barn automation (round housing press-fit or square housing flat-mount; CASTROL LMX standard; NYOGEL 792D cold-climate option). EP-FAD P1 for greenhouse robot arm joints and precision horticulture automation. For right-angle motor layouts in spreader or tractor drives: EP-FABR. For high-torque robot base joints in autonomous field platforms: EP-FAB P1. For compact wrist axes on harvest robots: EP-FADS P0.

Browse the full EP series range. For agricultural gearbox comparison resources: agriculturalgear-boxes.com. For worm reducer technology comparison: worm-reducers.xyz.

Frequently Asked Questions — Agricultural Gearbox Selection

Why does CASTROL LMX have a 0°C lower limit, and what happens if I run below it?＋
CASTROL LMX is a synthetic ester-based grease with a pour point specification of approximately 0°C — below this temperature, the grease’s base oil viscosity increases significantly, making it too stiff to flow adequately through the gear mesh contacts during initial rotation (cold start). When the gearbox attempts to start under these conditions, the stiff grease creates additional resistance that the servo motor must overcome before the lubricant film is re-established by frictional heating. On small servo motors (100–300 W, typical for agricultural seeder drives), this additional cold-start torque demand can exceed the motor’s peak torque rating, causing the drive inverter to trip on overcurrent — exactly the failure mode that the Canadian seeder OEM customer described above. The solution is NYOGEL 792D synthetic grease, which maintains acceptable viscosity down to −10°C and is available as a cold-climate option for all EP-FPG and EP-FPGA frame sizes. If your deployment region experiences ambient temperatures below −10°C during operation, contact Korea Ever-Power application engineering for a specialist cold-climate lubricant option.
Is EP-FPG suitable for a combine harvester cutter head where stone impacts are frequent?＋
EP-FPG helical planetary gears have significantly better shock load tolerance than worm gearboxes for the reason described in Section 4: three planet gears simultaneously share the transmitted torque, distributing any shock load across three contact zones rather than concentrating it at a single worm-wheel tooth. However, the correct selection for a combine harvester cutter head depends on the specific shock torque magnitude relative to the EP-FPG rated peak torque at the selected frame size. For stochastic stone impacts of moderate energy (pebbles, soil clods), EP-FPG P2 at the appropriate frame size is suitable. For high-energy impacts (large stones, root masses in root vegetable harvesters), specify the EP-FPG frame size with a service factor of 2.0–3.0 applied to the rated continuous torque. Korea Ever-Power application engineering can provide shock load service factor guidance for specific harvester head duty cycles — contact [email protected] with your cutter head mass, typical operating speed, and estimated peak shock torque.
How does the 38% motor current saving from EP-FPG translate to real cost on a precision seeder?＋
The 38% motor current saving is documented from a field installation comparing worm gear drives and EP-FPG/FPGA at the same drive point under the same load conditions. To estimate the economic value for a specific application, use: Energy saving (W) = Motor power (W) × (1/η_worm − 1/η_planetary) × η_worm × η_planetary. For a 300 W rated seeder motor: saving ≈ 300 × (1/0.65 − 1/0.97) × 0.65 × 0.97 ≈ 115 W per drive point. For a 24-row seeder with 24 drives: 24 × 115 W = 2.76 kW total power reduction. At 10 hours per day, 200 working days per year, at KRW 100/kWh industrial electricity: 2.76 kW × 10 hr × 200 days × KRW 100 = KRW 552,000 per year in electricity savings from the seeder drives alone. On an electric autonomous platform, the same saving translates to extended field coverage per battery charge. The energy saving calculation for your specific motor wattage, daily hours, and local electricity cost is straightforward — contact [email protected] and Korea Ever-Power will provide a site-specific TCO comparison for your application.
Can EP-FPG be used in aquaculture environments with saltwater spray?＋
Yes, with the correct lubrication specification. EP-FPG/FPGA with CASTROL LMX grease is rated for use in saltwater spray environments at temperatures above 0°C — the IP65 sealed housing prevents saltwater ingress, and CASTROL LMX does not react adversely to salt water at the concentrations encountered in aquaculture splash environments. For cold-ocean aquaculture (salmon farming in Norwegian, Scottish, or Canadian Pacific waters where water and ambient temperatures are regularly below 5°C), specify NYOGEL 792D to maintain cold-start lubricant fluidity. The aluminium alloy housing of EP-FPG/FPGA has good corrosion resistance to saltwater environments; however, prolonged immersion in seawater is not recommended — the gearbox is designed for spray and splash exposure (IP65 classification), not continuous submersion. For applications requiring submersible drive capability, contact Korea Ever-Power application engineering.
What is the minimum order quantity for OEM pricing on EP-FPG for agricultural machinery production?＋
There is no minimum order quantity for standard-catalogue EP-FPG and EP-FPGA items (all frame sizes 040–160, all standard ratios, P2 and standard backlash grades). Stock items are available for 5–10 day delivery on orders up to 50 units. Volume pricing breaks are available from 50 units per frame size per order, with additional breaks at 100, 250, and 500 units. For agricultural OEMs with seasonal demand profiles (large orders in Q1–Q2 ahead of planting season), Korea Ever-Power offers annual pricing agreements that fix the unit price against a projected annual volume commitment, with flexible delivery scheduling across the year. To request OEM pricing, send: frame size required, ratio, backlash grade (P2 or standard), CASTROL LMX or NYOGEL 792D specification, and estimated annual volume to [email protected]. For projects requiring a custom hub bore diameter or non-standard ratio for a new machine design, contact application engineering with your motor model, hub bore diameter, and required output speed range.

Specify EP-FPG/FPGA or EP-FAD for Your Agricultural Machine
Send your hub bore diameter, deployment region (for lubricant specification), and motor model — Korea Ever-Power will confirm frame size, ratio, and lubrication specification within 24 hours. OEM volume pricing and cold-climate NYOGEL 792D option available.

Request Agricultural Gearbox Specification →

Editor: Cxm

VR Tour of Our Factory

TAGs:

Recent Comments

No comments to show.