EP-TM Precision Helical Planetary Gearbox
EP-TM’s helical planet gears deliver contact ratio 2× higher than spur gears — translating directly into lower noise (≤56–70 dB), smoother torque, and longer gear life.
EP-TM Series — Precision Helical Planetary Gearbox | Frames 042–220 mm, P0/P1/P2, up to 2,000 N·m
그만큼 EP-TM precision helical planetary gearbox is the core servo transmission for Korean manufacturing — packaging machines, CNC 5-axis centres, welding robots, semiconductor equipment, and solar trackers all specify EP-TM as their standard servo gearbox. Seven frame sizes (042–220 mm) cover output torques from 17 N·m to 2,000 N·m with gear ratios i=3 to i=100 in single and dual stage configurations. Three backlash grades — P0 (≤1 arcmin), P1 (≤3 arcmin), P2 (≤5 arcmin) — serve every Korean precision positioning requirement.
Precision helical planetary gearbox · Direct servo motor coupling · IEC / NEMA universal adapter
EP-TM Series — Complete Technical Specifications
① Rated Output Torque, Speed & Backlash — All 7 Frames
| Parameter | 단위 | 단계 | TM042 | TM060 | TM090 | TM115 | TM142 | TM180 | TM220 |
|---|---|---|---|---|---|---|---|---|---|
| Rated output torque T₂ₙ (N·m) | 뉴엠 | L1 (i=3–10) | 17–22 | 50–60 | 130–160 | 208–330 | 342–650 | 588–1,200 | 1,140–2,000 |
| L2 (i=12–100) | 17–22 | 50–60 | 130–160 | 208–330 | 342–650 | 588–1,200 | 1,140–2,000 | ||
| Max output torque T₂max | 뉴엠 | L1/L2 | 3 × T₂ₙ (emergency / acceleration) | ||||||
| Rated input speed nₙ | 회전수 | L1/L2 | 5,000 | 5,000 | 4,000 | 4,000 | 3,000 | 3,000 | 2,000 |
| Max input speed n₁max | 회전수 | L1/L2 | 10,000 | 10,000 | 8,000 | 8,000 | 6,000 | 6,000 | 4,000 |
| Ultra-precision P0 backlash | 아크민 | L1 | ≤ 1 arcmin | ||||||
| Precision P1 backlash | 아크민 | L1 / L2 | ≤ 3 arcmin (L1) / ≤ 5 arcmin (L2) | ||||||
| Standard P2 backlash | 아크민 | L1 / L2 | ≤ 5 arcmin (L1) / ≤ 7 arcmin (L2) | ||||||
| 비틀림 강성 | N·m/arcmin | L1 | 3 | 7 | 14 | 25 | 50 | 145 | 225 |
| Permissible radial force Fr | N | L1/L2 | 780 | 1,530 | 3,250 | 6,700 | 9,400 | 14,800 | 50,000 |
| Permissible axial force Fa | N | L1/L2 | 390 | 765 | 1,625 | 3,350 | 4,700 | 7,250 | 25,000 |
| 효율 η | % | L1 / L2 | ≥ 97% (L1) / ≥ 94% (L2) | ||||||
| Weight (approx.) | kg | L1 | 0.5 | 1.3 | 3.7 | 7.8 | 14.5 | 29 | 48 |
| Noise (n=3,000 rpm, no-load) | dB(A) | L1/L2 | ≤56 | ≤58 | ≤60 | ≤63 | ≤65 | ≤67 | ≤70 |
−10°C to +90°C
IP65 표준
Sealed grease — lifetime
Any orientation
S1 round / S2 keyed
20,000+ hours S1
② Available Gear Ratios — Single & Dual Stage
| 단계 | Available Ratios i | 능률 | P1 Backlash | Best For |
|---|---|---|---|---|
| L1 Single-Stage | 3 · 4 · 5 · 6 · 7 · 8 · 10 | ≥97% | ≤3′ | Packaging, energy-critical, short axial length |
| L2 Dual-Stage | 12 · 15 · 20 · 25 · 30 · 35 · 40 · 50 · 60 · 70 · 80 · 100 | ≥94% | ≤5′ | Robot joints, CNC rotary axes, inertia matching |
Why EP-TM Helical Gears Outperform Spur Planetary in Korean Servo Applications
Helical tooth geometry keeps multiple teeth simultaneously engaged — contact ratio exceeds 2.0 versus 1.1–1.4 for spur gears. Torque transmission is continuous rather than pulsed, reducing vibration at the root cause rather than masking it. Gear tooth surface fatigue life is extended because each tooth carries a fraction of the total load for a longer engagement arc. The quantifiable result: EP-TM noise is 10–15 dB lower than spur planetary units at the same frame size and rated speed.
The planet carrier and output shaft are machined as a single integrated component. Front and rear bearings are positioned at maximum span within the housing — this wide bearing span is the primary structural determinant of output shaft rigidity, radial runout, and tilting moment resistance. Planet pin bore locations are precision-drilled to maintain equal planet load sharing within ±5%, preventing premature fatigue of individual planet gear sets in high-cycle Korean packaging and robot applications.
Ring gear and housing body are a single hot-forged alloy steel component — no bolted-together assembly, no interface where concentricity errors accumulate. All critical surfaces (ring gear ID, output bearing seats, motor flange face) are machined in a single setup. The one-piece forging achieves DIN Class 5–6 gear quality across every production unit, confirmed on the large-format Osaka Seimitsu gear measurement system before shipment.
Two diametrically opposed clamping bolts apply symmetric force on the motor shaft — no shaft deflection, no runout induced by asymmetric clamping. The result is zero-backlash power transmission from motor shaft to sun gear at all operating conditions, including the 10,000 rpm maximum input speed. Korean packaging machine engineers who previously experienced motor shaft slippage under high-cycle reversing loads consistently specify EP-TM's dual-bolt clamp as the resolution.
Front adapter plate machined to IEC and NEMA standard motor flange dimensions for all seven frame sizes. Compatible with Yaskawa Sigma-7, Mitsubishi HG-SR, Panasonic MINAS A6, Siemens SIMOTICS S, Fanuc αi-S, and all Korean servo brands without modification. Adapter plate drawings provided same business day — Korean engineers confirm motor compatibility before ordering with zero risk of incorrect fit.
Factory-filled with premium synthetic grease (NYOGEL 792D) and permanently sealed at both input and output. No field re-greasing, no oil changes, no scheduled lubrication maintenance for 20,000+ hours in S1 continuous operation. The only required maintenance activity is annual backlash measurement against the delivery certificate baseline — the one-page checklist from our maintenance guide. IP65 standard, −10°C to +90°C, any mounting orientation.
Installation Guide — EP-TM Series
Confirm Model Code & Motor Compatibility
Verify the EP-TM model code: frame size (042–220), ratio (L1: 3–10 / L2: 12–100), shaft type (S1 round / S2 keyed), precision grade (P0/P1/P2), and motor interface code. Confirm motor shaft diameter and pilot register diameter match the adapter plate drawing before unpacking. Korea Ever-Power provides dimensional drawings same business day for any model/frame combination.
Motor Shaft Insertion — Symmetric Clamping
Clean motor shaft and input bore. Insert motor shaft until the motor face contacts the adapter plate squarely — no axial gap. Tighten the two clamping bolts in alternating half-turns to maintain symmetric load. Final torque: M4=2.5 N·m, M5=5 N·m, M6=9 N·m. Verify motor shaft does not protrude beyond the sun gear engagement point.
Output Shaft / Machine Interface
For keyed shaft (S2): install coupling half key with correct key fit (clearance fit for smooth engagement). For round shaft (S1): use friction clamp coupling, apply correct bore-to-shaft fit (H7/h6 recommended). Mounting surface flatness must be ≤0.02 mm. Do not use impact tools on the output shaft — the output bearing pre-load cannot be restored after shock loading.
Machine Mounting — Flange Face Registration
Align the gearbox housing pilot register with the machine bore — close-running fit. Install 4× housing mounting bolts and torque evenly in a cross pattern. Verify there is no bending moment applied to the housing from the mounting surface — all four mounting bolt contact surfaces must be coplanar within 0.02 mm before tightening.
Radial Load Verification
Confirm the applied radial load at the output shaft centre (x = L/2·xL) does not exceed the permissible Fr from the specification table. For belt, chain, or gear-loaded outputs with off-centre loading, apply the position factor Kb. See the radial load calculation guide for the full methodology. Exceeding Fr reduces output bearing L10 life proportionally.
No-Load Run-In & Baseline Backlash Record
Run at no-load at ≤50% rated input speed for 30 minutes. Monitor housing temperature — confirm it stabilises below ambient + 40°C. After run-in, measure output shaft backlash using the delivery certificate method (apply ±3% T₂ₙ torque, read angular displacement). Record this as the installation baseline. Compare annually against the delivery certificate value per the maintenance guide.
⚠ Critical Cautions: Never apply axial force to the output shaft during load installation — use a shaft puller, not a hammer. Do not exceed maximum input speed specifications even momentarily — bearing cage damage at overspeed is not covered under warranty. Do not mix lubricants — the sealed grease fill is specification-correct for the full rated life; adding oil or grease changes the lubrication chemistry.
✔ Zero Maintenance for 20,000 Hours: The factory-sealed EP-TM requires no re-greasing, no oil changes, and no scheduled lubrication attention. The only maintenance is annual backlash measurement (5-minute procedure) and external visual inspection. IP65 housing withstands Korean factory washdown and outdoor exposure without additional sealing.
EP-TM Internal Architecture — Five Precision-Engineered Components
Every Korea Ever-Power EP-TM is built from five precision subsystems. Understanding the design rationale behind each helps Korean engineers evaluate not just the delivered specification, but the mechanism by which that specification is achieved and sustained across 20,000 hours.
① Precision Helical Gears
Case-hardened alloy steel, helical tooth geometry, contact ratio >2.0. Ground to DIN Class 5–6 after hardening. The helical angle introduces a small axial thrust load on the sun gear bearing — Korea Ever-Power's bearing pre-load selection accounts for this within the published axial force limits.
② Precision Planet Carrier
Carrier and output shaft machined as one piece. Wide-span front and rear bearings — this bearing span is the primary determinant of output shaft rigidity and radial runout. Planet pin bore locations precision-bored to ±5% load sharing tolerance.
③ Forged Ring Gear Housing
Ring gear and housing body hot-forged from one alloy steel billet. All critical surfaces machined in a single setup — eliminating concentricity errors from assembly. DIN Class 5–6 achievable because the reference datum never changes between gear cutting and bearing seat grinding.
④ Dual-Clamp Input Shaft
Two diametrically opposed clamping screws apply symmetric balanced clamp force — no shaft deflection, no runout during tightening. Rated for 10,000 rpm maximum input speed with full torque. Korean packaging engineers consistently identify this as the resolution to motor shaft slippage under high-cycle reversing loads.
⑤ Universal Servo Adapter Plate
Precision-machined alloy plate with IEC standard motor flange dimensions. Pilot bore and bolt circle held to h6/H7 for clean register fit. Adapter plates are individually specified per motor model — changeable independently of the gearbox body.
INERTIA J (kg·cm²) — L1 SINGLE STAGE
TM060: 0.03–0.45
TM090: 0.03–2.62
TM115: 0.03–7.25
TM142: 0.03–22.75
TM180: 0.03–50.97
For inertia matching calculation, see inertia matching guide →
How to Read an EP-TM Model Code
유성 기어박스
042/060/090/115/142/180/220
L1: 3–10 · L2: 12–100
S1=round · S2=keyed
P0≤1′ · P1≤3′ · P2≤5′
specify motor model at order
Motor Input Flange Dimensions — EP-TM Single-Stage L1
| 액자 | Pilot Ø (C1) | Bolt circle / Thread (C2) | Input shaft Ø (C3) | Depth C4 | Total length C9 |
|---|---|---|---|---|---|
| TM042 | Ø45 / Ø46 | 4-M3×8 / 4-M4×10 | Ø8 | 27.5 | 91.5 mm |
| TM060 | Ø66.7 / Ø70 / Ø90 | 4-M4×10 / M5×12 / M6×14 | Ø8 / Ø11 / Ø19 | 34 | 116 mm |
| TM090 | Ø90 / Ø100 / Ø115 / Ø145 | M5×12–M8×20 | Ø19 / Ø16 / Ø19,22 | 42 | 147 mm |
| TM115 | Ø145 / Ø200 | 4-M8×20 / 4-M12×28 | Ø19,22 / Ø35 | 64 | 199 mm |
| TM142 | Ø145 / Ø200 | 4-M8×20 / 4-M12×28 | Ø22 / Ø35 | 72 | 252 mm |
| TM180 | Ø55 / Ø95 (custom) | 4-M12×30 | Ø19 h6 | 85 | 287 mm |
| TM220 | Ø75 / Ø165 (custom) | 4-M12×30 | Ø20 h6 | 120 | 364.5 mm |
TM180/TM220 input dimensions customisable — confirm at time of order. Confirm all dimensions against Korea Ever-Power dimensional drawing before finalising machine design.
EP-TM in Korean Industry — Six Core Application Scenarios
① Korean Packaging Machine Servo Axes
VFFS and HFFS lines in Korea's Chungcheong and Gyeonggi food packaging clusters use EP-TM090/115 P1 on cross-seal jaw drives (i=10–15) and film pull servo axes (i=5–8). The helical gear's smooth torque delivery is critical on the jaw axis where motor reversal at each cycle must produce zero mechanical impulse — protecting seal quality at 100+ cycles/minute. EP-TM090 P1 is Korea's most-specified jaw axis gearbox by packaging integrators.
② Korean 5-Axis CNC B/C Rotary Table
Doosan Machine Tools, Hwacheon, and DMG Mori Korea specify EP-TM090/115 P0 (i=50–100, dual-stage) for B and C rotary table axes. The low noise (≤60–63 dB) is valued in Korean machine tool showroom environments; P0 ≤1 arcmin backlash translates directly to angular positioning accuracy for 5-axis contour machining. Motor-dominant J_ratio (i=50 makes load contribution <0.05:1) means B-axis tuning is stable across the full workpiece weight range — see inertia matching guide.
③ Korean Automotive Welding Robot Joints
Hyundai-Kia Asan and Ulsan assembly plants use 6-axis welding robots where J1–J3 base/shoulder/elbow joints require dual-stage planetary gearboxes at i=25–50. EP-TM115/142 P1 covers 50–150 kg payload Korean welding robot configurations. The 3× rated emergency torque specification (T₂max) handles the high-cycle clamp/toggle loads at spot-weld stations without cumulative gear tooth fatigue across 200,000-cycle/year production volumes.
④ Korean IMM Clamp & Ejector Axes
Korean injection moulding machine builders (LS Mtron, Woosung Machinery) use EP-TM115/142 at i=15–25 for clamp, ejector, and rotary table axes. Average load fraction 60–70% of rated torque matches EP-TM's efficiency sweet spot (≥97%). Full axis-by-axis BOM specification for a Korean 5-axis IMM: IMM application guide →
⑤ Korean AGV / AMR Differential Drive
Samsung SDS and CJ Logistics AMR fleets operating in Incheon and Suwon fulfilment centres use EP-TM042/060 for compact Mecanum and differential drive wheel hubs. The EP-TM042 (0.5 kg, □42 body) fits within tight wheel corner envelopes where inline motor clearance is the design constraint. Korea Ever-Power supplies ratio-matched pairs (≤0.01% ratio tolerance certificate) for AMR differential drive axes — critical for straight-line tracking accuracy.
⑥ Korean Solar Tracker Azimuth Drive
Korea's Jeollanam-do and Jeollabuk-do utility solar farms use EP-TM180/220 at i=50–100 for horizontal single-axis tracker azimuth slew drives. High radial load capacity (14,800–50,000 N) handles wind loading on long tracker arms. Stainless fastener option for coastal salt exposure. IP65 standard. Seasonal angular correction cycles well within the 20,000-hour life budget at tracker duty cycle — solar tracker application guide →
Why Korean Engineers Specify Korea Ever-Power EP-TM
🎯
Same-Day Technical Confirmation — Korean Language
Frame size selection, ratio calculation, inertia matching, motor adapter specification — confirmed in Korean within one business day. Korean procurement teams never need to wait for translated technical documentation or international sales response delays.
📋
Backlash Measurement Certificate with Every Unit
Every EP-TM ships with a factory-measured backlash certificate showing the actual measured value at ±3% T₂ₙ preload — not a nominal grade value. Korean quality engineers use this certificate to verify incoming inspection and as the maintenance baseline for the unit's 20,000-hour service life.
🏭
Korean Warehouse Stock — Same-Week Delivery
EP-TM frames 042–142, ratios i=5/10/25/50, P1 and P2 grades held in Korea stock for same-week delivery. EP-TM180/220, P0 grade, and non-standard ratios: 2–4 week production lead time. Korean OEM production schedules never stall on gearbox availability.
🔄
Direct Competitor Replacement — Dimensional Drawings Provided
Korean machines currently running competitor helical planetary gearboxes can switch to EP-TM without machine redesign in most cases. Provide the competitor part number — Korea Ever-Power confirms dimensional compatibility or identifies the exact adapter plate needed, same day, with dimensional drawing.
⚡
Ratio-Matched AMR/AGV Pairs — ≤0.01% Tolerance
Korean AMR differential drives require paired gearboxes with matched gear ratios for straight-line tracking accuracy. Korea Ever-Power provides ratio-matched EP-TM042/060 pairs with ≤0.01% ratio variation and a certificate confirming the measurement — eliminating the tracking drift that unmatched pairs produce at straight-line traverse speeds above 1.5 m/s.
🇰🇷
ISO 50001 Energy Documentation — Korean Format
Samsung and Hyundai tier-1 suppliers undergoing ISO 50001 energy audits receive a Korean-language energy saving report for any EP-TM application — documenting annual kWh saving, ₩ saving, CO₂ reduction, and payback period versus worm reducers. Meets Korea Energy Agency subsidy application documentation requirements.
System Integration — Complementary Products & Accessories
KEY ACCESSORIES — EP-TM SERIES
Bellows Coupling
Jaw Coupling
Encoder Bracket
Output Shaft Coupling
Backlash Certificate
CV Drive Shafts — Output-Side Torque Transmission
When EP-TM output torque must reach a load located at a distance from the gearbox — gantry cross-beam rack-and-pinion pinions, solar tracker array shafts spanning multiple bays, multi-station conveyor head pulleys — a constant-velocity drive shaft between the gearbox output flange and the load coupling absorbs installation angular misalignment (±3–8° for standard industrial CV joints) without imposing bending moments on the EP-TM output bearing. A rigid intermediate shaft under the same misalignment conditions transmits a cyclically varying bending moment to the output bearing at twice rotational frequency — accelerating bearing fatigue and reducing L10 life. CV shafts are the standard complement to EP-TM on Korean laser cutting gantry X-axes and large-format CNC horizontal machining centres where perfect motor-to-rack alignment cannot be guaranteed after machine levelling.
Worm Gear Reducers — Self-Locking & Ultra-High Ratio Stages
For applications requiring combined gear ratios above i=100 with self-locking capability — vertical load-holding axes, rotary indexing table dwell-lock between index events, gravity-loaded linear drives that must hold position under power loss — a 웜 기어 감속기 downstream of EP-TM creates a compact two-stage drive system. The EP-TM stage handles the high-speed reduction at high efficiency (η≥97% at i=10); the worm stage adds self-locking and the final ratio increment at its characteristically lower efficiency. Verified two-stage calculation: EP-TM at i=10 (η≥97%) × worm at i=30 (η≈55–70%) = combined i=300, overall system η≈54–68%. Where self-locking is not required, EP-TM alone at i=100 dual-stage (η≥94%) is the more energy-efficient single-unit solution — for the full comparison, see the efficiency calculation guide.
Agricultural Gearboxes & Multi-Output Power Distribution
Modern precision agriculture increasingly replaces fixed-ratio chain and belt drives with servo-controlled planetary reducers at the primary drive stage. GPS-guided seeding heads, variable-rate fertiliser spreaders, and combine harvester header drives all benefit from EP-TM's position-controlled angular accuracy — the same servo loop that achieves ±1.8 arcsec repeatability in a Korean CNC B-axis controls row spacing to within ±5 mm at 10 km/h field speed. Downstream agricultural gearboxes then distribute this controlled rotational motion to multiple output shafts — fan, auger, seed meter, and reel drives — from the single EP-TM output. EP-TM180/220 at i=50–100 covers the 600–1,200 N·m torque range of typical agricultural main drive axes, with IP65 sealing and stainless fastener options for field exposure environments.
Customer Reviews & Field Performance
5 ★
91%
4 ★
7%
≤3 ★
2%
EP-TM090 P1 i=10 single-stage on our VFFS cross-seal jaw servo axis. Previous competitor unit was producing a faint 60 Hz knock at the reversal point — traced to spur gear engagement impulse. Switched to EP-TM090 helical: knock eliminated at first power-on, seal quality improved measured 4% across 3,000 pouches. Now 14 months in production at 3 shifts per day, zero backlash growth versus delivery certificate. Korea Ever-Power confirmed the direct-fit replacement for our Yaskawa SGM7J-04A motor in 2 hours.
EP-TM115 P0 i=50 dual-stage for the B-axis of our compact 5-axis VMC. Angular positioning accuracy measured at ±1.8 arcsec repeatability at the output flange — well inside our 5 arcsec customer spec. Inertia ratio J_ratio = 0.04:1 means the axis tunes in under 5 minutes and is completely stable across 500 kg workpiece weight variation. Korea Ever-Power provided the inertia calculation report in Korean for our customer documentation package.
Specifying EP-TM142 P1 i=25 on J2 shoulder joint of welding robots for Hyundai Asan assembly line upgrade. 48 units over two years — zero warranty returns. The 3× T₂max specification (rated 342 N·m, max 1,026 N·m) handles the spot-weld clamp peak loads without requiring oversizing to the next frame. Korea Ever-Power delivered all 48 units with matched delivery certificates within 0.3 arcmin unit-to-unit variation — our quality system logs this data.
Share your EP-TM application experience. 한국 에버파워에 문의하세요: [email protected]
Frequently Asked Questions — EP-TM Helical Planetary Gearbox
Specify Your EP-TM — Korea Ever-Power Same-Day Engineering Support
Frame selection, ratio calculation, inertia matching, motor adapter confirmation — Korea Ever-Power delivers the complete EP-TM specification for your Korean application within one business day. All documentation in Korean.
추가 정보
| 편집자 | Cxm |
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