High-Precision
Planetary Gearboxes
Built for Servo Perfection
From ≤1 arc-min backlash to 200:1 single-unit reduction — Korea Ever-Power manufactures EP-FAB, EP-FAD, EP-FAL, EP-FPG and six further series covering every servo integration scenario in CNC, robotics, semiconductor, and beyond.
Eight Precision Planetary Gearbox Series
From ultra-compact economy drives to high-speed semiconductor-grade precision — every servo integration scenario covered. All series share DIN 5 profile-ground gears and NYOGEL 792D or CASTROL LMX lifetime lubrication.
Square Flange
EP-FAB Series
Square-flange high-precision inline gearbox. Flagship servo platform — P0 backlash ≤1 arc-min, 9 frame sizes 042–220 mm, rated torque up to 2,000 Nm.
Right-Angle
EP-FABR Series
Square-flange 90° bevel right-angle gearbox. Same EP-FAB internals with perpendicular output — ratios to 200:1, 4-position housing orientation.
Round Flange · High Speed
EP-FAD Series
Round-flange high-speed precision gearbox. 10,000 rpm max input, 30,000 hr design life, special ratios i=16/21/31/61/91 for semiconductor and FPD.
Round Flange · 90°
EP-FADR Series
Round-flange right-angle high-speed gearbox. 10,000 rpm, 30,000 hr, 200:1 — the complete right-angle solution for semiconductor robot wrists and FPD handling.
Belt Pulley · 90°
EP-FALR Series
Right-angle gearbox with integrated timing belt pulley output. Motor perpendicular to belt axis — 180:1 in one unit, F_rad up to 34,200 N, for corner-drive gantries.
Economy Tier
EP-FPG / FPGA Series
Economy planetary gearbox in round (FPG) or square (FPGA) housing. ≥97% efficiency at reduced unit cost — ideal for conveyors, AGVs, and general servo automation.
Inside a Planetary Gearbox — Component Breakdown
Understanding the internal architecture helps engineers select the right backlash grade, torque class, and output configuration. Every EP-series gearbox is built on these five precision sub-assemblies.
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01
Ring Gear (Annulus)Case-hardened alloy steel, 5-axis CNC profile-ground to DIN 5 class. The fixed outer gear meshes with all three planet gears simultaneously — ground to the same accuracy class as European precision gearboxes.
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02
Planet Gears (3×)Helical-cut, case-hardened 20CrMnTi steel. Three planet gears distribute the load evenly, tripling the torque capacity versus a spur gear of equivalent size and producing smooth, low-vibration transmission.
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03
Sun Gear (Input)Connected directly to the motor shaft via the clamp-ring adapter. Drives all three planet gears simultaneously. Ground and lapped for precise pitch diameter — the primary determinant of backlash grade.
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04
Planet Carrier (Output)Precision-machined housing that supports the planet gear axles and forms the output shaft. Supported by an oversized cross-roller or angular-contact bearing for combined radial and axial loads.
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05
Output Bearing & IP65 SealingOversized output bearing absorbs radial force up to 50,000 N (EP-FAB220). IP65 dynamic seals on all interfaces. Factory-filled with NYOGEL 792D synthetic grease for the full rated service life — no re-greasing required.
Series Comparison — Key Parameters at a Glance
Use this matrix to shortlist the right EP-series for your servo application before reviewing individual product datasheets.
| Series | Flange Type | Output | Frame Sizes | Max Torque | P0 Backlash | Max Ratio | Life (hr) |
|---|---|---|---|---|---|---|---|
| EP-FAB | Square | Inline | 042–220 mm | 2,000 Nm | ≤1 arc-min | 100:1 | 20,000 |
| EP-FABR | Square | 90° Right-Angle | 042–220 mm | 2,000 Nm | ≤2 arc-min | 200:1 | 20,000 |
| EP-FAD | Round | Inline | 047–255 mm | 2,000 Nm | ≤1 arc-min | 100:1 | 30,000 |
| EP-FADR | Round | 90° Right-Angle | 047–255 mm | 2,000 Nm | ≤2 arc-min | 200:1 | 30,000 |
| EP-FADS | Round | Inline Direct Shaft | 047–255 mm | 2,000 Nm | ≤1 arc-min | 91:1 | 30,000 |
| EP-FAL | — | Inline + Belt Pulley | 070–280 mm | 2,000 Nm | ≤1 arc-min | 90:1 | 30,000* |
| EP-FALR | — | 90° + Belt Pulley | 070–280 mm | 2,000 Nm | ≤2 arc-min | 180:1 | 30,000* |
| EP-FPG / FPGA | Round/Square | Inline Economy | 040–160 mm | 423 Nm | ≤8 arc-min | 100:1 | 20,000* |
* FAL/FALR: 30,000 hr intermittent (S5); 15,000 hr continuous (S1) | FPG/FPGA: 20,000 hr S5; 10,000 hr S1 | All other series: rated under continuous S1 duty at 50% mean load.
Why Machine Builders Choose Korea Ever-Power
DIN 5 Profile-Ground Precision
Ring gear and planet gears 5-axis CNC profile-ground to DIN Class 5 — the same accuracy level as European premium servo gearboxes. Every unit passes individual CMM housing inspection and loaded noise verification before shipping.
Backlash Grade-Stamped on Every Unit
Every EP-FAB/FAD/FADR unit is individually backlash-measured at 2% rated torque. The measured P0/P1/P2 grade is stamped on the nameplate before shipment — not a batch sample, but every single unit.
Universal Motor Adapter System
C1–C10 clamp-ring adapter rings fit Siemens, Yaskawa, Mitsubishi, Panasonic, and hundreds of other servo motor flanges. Motor validated on one EP series fits the same frame across all series — zero re-engineering cost when changing gearbox type.
IP65 Pressure-Tested on Every Unit
Pneumatic pressure applied to all dynamic seal interfaces on every unit — 60-second decay test. Any unit failing is rejected and resealed before boxing. Fully suitable for CNC coolant-mist and washdown environments.
Lifetime Lubrication — Zero Maintenance
Factory-filled with NYOGEL 792D synthetic grease rated for the full service life (20,000–30,000 hr) at −10°C to +90°C. No re-greasing intervals, no maintenance windows — a genuine seal-and-forget design for continuous-duty servo axes.
8 Series — One Supplier
From economy EP-FPG drives to semiconductor-grade EP-FAD gearboxes — from inline shaft output to integrated timing belt pulleys — Korea Ever-Power covers every servo gearbox requirement. One supplier qualification, one quality system, one point of contact.
Planetary Gearboxes Across Every Precision Industry
Korea Ever-Power EP-series planetary gearboxes power the world's most demanding automation systems — from Korean semiconductor fabs running 10,000-rpm theta axes to European CNC machine builders specifying ≤1 arc-min backlash on 5-axis rotary tables.
CNC Machining Centers
B/C-axis rotary tables, pallet changers, and automatic tool changers require sub-arc-minute backlash to hold JIS Class-1 positioning tolerances across thousands of cycles per day. EP-FAB and EP-FAD P0 grade are the confirmed choices for leading Korean and Japanese CNC builders.
EP-FAB / EP-FAD P0Industrial Robotics
6-axis articulated robot joints demand the highest combination of torque density, backlash precision, and bearing stiffness in a compact axial length. EP-FAB P1 enables sub-0.05 mm TCP repeatability; EP-FADR round-flange bolts directly to aluminium link arms without adapter plates.
EP-FAB P1 / EP-FADRSemiconductor & FPD
Wafer handler theta-axis and FPD glass transport robots operate at up to 10,000 rpm in ISO Class-4 cleanrooms. EP-FAD special ratios i=21 and i=31 match standard substrate pitch dimensions exactly — no software pitch correction factor required.
EP-FAD / EP-FADS Special RatiosPackaging Machinery
Form-fill-seal jaw drives and high-speed indexing axes run at up to 600 cycles/min with aggressive acceleration profiles. The EP-FAL integrated timing belt pulley eliminates the separate hub-to-shaft eccentricity that causes periodic position error at the pulley rotation frequency.
EP-FAL / EP-FALRLaser & Plasma Cutting
High-acceleration gantry axes at over 2 g peak acceleration generate large belt tension forces on the drive pulley. EP-FAL's F_rad rating up to 34,200 N and integral pulley-bore concentricity eliminate the external support bearing and bracket that are the most common maintenance point on wide AT10 belt drives.
EP-FAL / EP-FALRAGV & Mobile Robots
High-volume indoor AGV drivetrains require planetary torque density and efficiency at economy pricing. EP-FPG round housing press-fits directly into machined wheel hub bores — no adapter bracket, no external bearing housing — at a unit cost significantly below the premium series.
EP-FPG / EP-FPGA EconomyHow to Select the Right Series
Five questions that narrow 8 series down to the correct one for your servo integration in under two minutes.
Built to the Standard of European Precision
Every EP-series gearbox is manufactured in Ansan-si, Gyeonggi-do, Korea — on the same 5-axis CNC gear-grinding equipment used for premium European servo gearboxes. Each unit exits the line with a documented quality record.
Trusted by Engineers Across Asia and Beyond
Hover over the carousel to pause and read. Feedback from machine builders in CNC, semiconductor, packaging, and logistics automation.
Replaced a European brand with EP-FAB090-P1 on our PCB drilling machine. After 10 months of 3-shift operation, zero backlash growth and noise is noticeably lower. The motor adapter system saved our team weeks of custom bracket design.
Switched from EP-FAD090 with adapter to EP-FADS090. The 22 mm axial length saving let us route the encoder cable inside the housing — critical in our ISO Class 4 cleanroom. Running at 8,500 rpm for 14 months without any issue.
Replacing EP-FAB090 and a separate pulley hub with a single EP-FAL110 reduced periodic position error from 0.08 mm to 0.015 mm on our CNC router Y-axis. That one change moved us from grade C to grade A on the customer acceptance test.
EP-FALR190 at i=5 on a stone CNC gantry — the motor folds behind the end plate perpendicular to travel, giving us 180 mm more working length. Integrated pulley eliminated the external support bearing that was our main maintenance point. IP65 holds perfectly after 18 months.
We specify EP-FPGA080A for 240 conveyor indexing drives in a new distribution centre. The ≤8 arc-min backlash is more than adequate for our ±2 mm stop tolerance, and using the FPGA instead of the FAB saved roughly 18% on gearbox unit cost across the entire project.
EP-FAD200 at i=21 (special ratio) on our FPD glass transport robot. The i=21 matched our transport pitch exactly — no software correction factor. Motor is a fixed Yaskawa model across our entire machine range, so the committed bore in FADS was not a constraint. Excellent service response throughout.
