{"id":686,"date":"2026-06-01T03:45:36","date_gmt":"2026-06-01T03:45:36","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=686"},"modified":"2026-06-01T03:51:47","modified_gmt":"2026-06-01T03:51:47","slug":"ep-zde-series-round-flange-precision-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/el\/product\/ep-zde-series-round-flange-precision-planetary-gearbox\/","title":{"rendered":"EP-ZDE Series Round-Flange Precision Planetary Gearbox \u2014 Low Backlash Servo Gearbox"},"content":{"rendered":"
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<\/p>\n

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EP-ZDE Series \u2014 Round-Flange Precision Planetary Gearbox | Low-Backlash Servo Gearbox, <8 arcmin, up to 800 N\u00b7m<\/h2>\n
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\"EP-ZDE<\/p>\n

\n
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<8 \u03bb\u03b5\u03c0\u03c4\u03ac \u03c4\u03cc\u03be\u03bf\u03c5<\/div>\n
Single-stage backlash<\/div>\n<\/div>\n
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800 N\u00b7m<\/div>\n
Max output torque<\/div>\n<\/div>\n
\n
512:1<\/div>\n
Max ratio (3-stage)<\/div>\n<\/div>\n
\n
IP54<\/div>\n
Lifetime lubrication<\/div>\n<\/div>\n<\/div>\n
\u2190 Browse All Planetary Gearbox Series<\/a><\/div>\n<\/div>\n
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\u2605 The Most Versatile Inline Servo Planetary Gearbox in the Korea Ever-Power Range \u2014 Round Flange, Any Motor, Any Orientation<\/div>\n

EP-ZDE is the standard inline \u03c0\u03bb\u03b1\u03bd\u03b7\u03c4\u03b9\u03ba\u03cc \u03ba\u03b9\u03b2\u03ce\u03c4\u03b9\u03bf \u03c4\u03b1\u03c7\u03c5\u03c4\u03ae\u03c4\u03c9\u03bd \u03b1\u03ba\u03c1\u03b9\u03b2\u03b5\u03af\u03b1\u03c2<\/strong> and low-backlash servo gearbox<\/strong> with a round (circular) output mounting flange \u2014 the highest-volume servo gearbox series in the Korea Ever-Power catalogue. Five frame sizes (40\u2013160 mm), rated output torque 4.5\u2013800 N\u00b7m, backlash <8 arcmin (1-stage, frame 60\u2013160), precision clamping input compatible with any servo motor shaft. For the square-flange version, see the EP-ZDF series planetary gearbox<\/a>.<\/p>\n<\/div>\n

\u039f EP-ZDE series precision planetary gearbox for servo motor<\/strong> coupling from Korea Ever-Power is engineered for direct servo motor integration in Korean CNC machining centres, industrial robots, laser cutting systems, semiconductor handling equipment, and automated assembly lines. This \u03c0\u03bb\u03b1\u03bd\u03b7\u03c4\u03b9\u03ba\u03cc\u03c2 \u03bc\u03b5\u03b9\u03c9\u03c4\u03ae\u03c1\u03b1\u03c2 \u03c4\u03b1\u03c7\u03c5\u03c4\u03ae\u03c4\u03c9\u03bd<\/strong> mounts via its round output flange into a standard circular bore on the driven machine structure \u2014 the most common installation geometry in Korean OEM servo drive designs \u2014 with a cylindrical body diameter of \u03a640 to \u03a6160 mm and four G2 mounting screws on the output face.<\/p>\n

Internal gears, planetary gears, and the sunwheel are manufactured from case-hardened alloy steel, ground to h7 output shaft tolerances, assembled with matched-pair angular contact bearings. The factory-sealed lifetime lubrication requires no re-greasing over the 20,000-hour rated service life \u2014 approximately 8\u201310 years of two-shift operation in Korean manufacturing environments.<\/p>\n

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\ud83c\udfaf <8 arcmin Backlash<\/div>\n
Low-backlash planetary gearbox \u2014 1-stage, frame 60\u2013160 mm. Enables \u00b10.1 mm linear positioning at 100 mm radius.<\/div>\n<\/div>\n
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\ud83d\udd12 Lifetime Lubrication<\/div>\n
Factory-sealed grease \u2014 no maintenance over 20,000 hours rated life.<\/div>\n<\/div>\n
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\u2195 Any Orientation<\/div>\n
Horizontal, vertical shaft-up\/down, inverted, or any angle \u2014 no restrictions.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

<\/section>\n
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EP-ZDE Series \u2014 Complete Technical Specifications<\/h2>\n

\u2460 Rated Output Torque (N\u00b7m) \u2014 All Frame Sizes & Ratios<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u0391\u03bd\u03b1\u03bb\u03bf\u03b3\u03af\u03b1<\/th>\n\u03a3\u03c4\u03ac\u03b4\u03b9\u03bf<\/th>\nZDE-40<\/th>\nZDE-60<\/th>\nZDE-80<\/th>\nZDE-120<\/th>\nZDE-160<\/th>\n<\/tr>\n<\/thead>\n
3:1<\/td>\n1<\/td>\n4.5<\/td>\n12<\/td>\n40<\/td>\n80<\/td>\n400<\/td>\n<\/tr>\n
4:1<\/td>\n1<\/td>\n6<\/td>\n16<\/td>\n50<\/td>\n110<\/td>\n450<\/td>\n<\/tr>\n
5:1<\/td>\n1<\/td>\n6<\/td>\n16<\/td>\n50<\/td>\n110<\/td>\n450<\/td>\n<\/tr>\n
8:1<\/td>\n1<\/td>\n5<\/td>\n15<\/td>\n45<\/td>\n100<\/td>\n400<\/td>\n<\/tr>\n
10:1<\/td>\n1<\/td>\n4<\/td>\n12<\/td>\n40<\/td>\n80<\/td>\n305<\/td>\n<\/tr>\n
9:1<\/td>\n2<\/td>\n\u2014<\/td>\n40<\/td>\n100<\/td>\n210<\/td>\n\u2014<\/td>\n<\/tr>\n
12:1<\/td>\n2<\/td>\n16.5<\/td>\n40<\/td>\n100<\/td>\n210<\/td>\n700<\/td>\n<\/tr>\n
16:1<\/td>\n2<\/td>\n20<\/td>\n44<\/td>\n120<\/td>\n260<\/td>\n800<\/td>\n<\/tr>\n
20:1<\/td>\n2<\/td>\n20<\/td>\n44<\/td>\n120<\/td>\n260<\/td>\n800<\/td>\n<\/tr>\n
25:1<\/td>\n2<\/td>\n18<\/td>\n40<\/td>\n110<\/td>\n230<\/td>\n700<\/td>\n<\/tr>\n
32:1<\/td>\n2<\/td>\n20<\/td>\n44<\/td>\n120<\/td>\n260<\/td>\n800<\/td>\n<\/tr>\n
40:1<\/td>\n2<\/td>\n18<\/td>\n40<\/td>\n110<\/td>\n230<\/td>\n700<\/td>\n<\/tr>\n
64:1<\/td>\n2<\/td>\n7.5<\/td>\n18<\/td>\n45<\/td>\n100<\/td>\n400<\/td>\n<\/tr>\n
60\u2013512:1<\/td>\n3<\/td>\n16.5\u201320<\/td>\n40\u201344<\/td>\n100\u2013120<\/td>\n210\u2013260<\/td>\n\u2014<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\u25b8 Instant stop torque = 2\u00d7 rated output torque. <\/span>
\nRated life = 20,000 hours. Radial\/axial forces measured at output shaft centre (L\/2). 3-stage not available for ZDE-160.<\/span><\/div>\n

\u2461 Load Capacity, Efficiency, Weight & Speed<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nUnit<\/th>\nZDE-40<\/th>\nZDE-60<\/th>\nZDE-80<\/th>\nZDE-120<\/th>\nZDE-160<\/th>\n<\/tr>\n<\/thead>\n
Max radial force<\/td>\n\u0392<\/td>\n160<\/td>\n450<\/td>\n900<\/td>\n2,100<\/td>\n6,000<\/td>\n<\/tr>\n
Max axial force<\/td>\n\u0392<\/td>\n80<\/td>\n225<\/td>\n450<\/td>\n1,050<\/td>\n3,000<\/td>\n<\/tr>\n
Efficiency \u2014 1-stage<\/td>\n%<\/td>\n96<\/td>\n<\/tr>\n
Efficiency \u2014 2-stage<\/td>\n%<\/td>\n94<\/td>\n<\/tr>\n
Efficiency \u2014 3-stage<\/td>\n%<\/td>\n90<\/td>\n<\/tr>\n
Weight \u2014 1-stage<\/td>\n\u03ba\u03b9\u03bb\u03ac<\/td>\n0.4<\/td>\n0.9<\/td>\n2.1<\/td>\n6<\/td>\n18<\/td>\n<\/tr>\n
Weight \u2014 2-stage<\/td>\n\u03ba\u03b9\u03bb\u03ac<\/td>\n0.5<\/td>\n1.1<\/td>\n2.6<\/td>\n8<\/td>\n22<\/td>\n<\/tr>\n
Weight \u2014 3-stage<\/td>\n\u03ba\u03b9\u03bb\u03ac<\/td>\n0.6<\/td>\n1.3<\/td>\n3.1<\/td>\n9.5<\/td>\n\u2014<\/td>\n<\/tr>\n
\u039c\u03ad\u03b3\u03b9\u03c3\u03c4\u03b7 \u03c4\u03b1\u03c7\u03cd\u03c4\u03b7\u03c4\u03b1 \u03b5\u03b9\u03c3\u03cc\u03b4\u03bf\u03c5<\/td>\n\u03c3\u03c4\u03c1\u03bf\u03c6\u03ad\u03c2\/\u03bb\u03b5\u03c0\u03c4\u03cc<\/td>\n4,500<\/td>\n<\/tr>\n
Recommended input speed<\/td>\n\u03c3\u03c4\u03c1\u03bf\u03c6\u03ad\u03c2\/\u03bb\u03b5\u03c0\u03c4\u03cc<\/td>\n3,000<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u2462 Backlash, Torsional Stiffness & Noise<\/h3>\n
\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nUnit<\/th>\nZDE-40<\/th>\nZDE-60<\/th>\nZDE-80<\/th>\nZDE-120<\/th>\nZDE-160<\/th>\n<\/tr>\n<\/thead>\n
Backlash \u2014 1-stage<\/td>\narcmin<\/td>\n<12<\/td>\n<8<\/td>\n<8<\/td>\n<8<\/td>\n<8<\/td>\n<\/tr>\n
Backlash \u2014 2-stage<\/td>\narcmin<\/td>\n<15<\/td>\n<12<\/td>\n<12<\/td>\n<12<\/td>\n<12<\/td>\n<\/tr>\n
Backlash \u2014 3-stage<\/td>\narcmin<\/td>\n<18<\/td>\n<15<\/td>\n<15<\/td>\n<15<\/td>\n\u2014<\/td>\n<\/tr>\n
\u03a3\u03c4\u03c1\u03b5\u03c0\u03c4\u03b9\u03ba\u03ae \u03b1\u03ba\u03b1\u03bc\u03c8\u03af\u03b1<\/td>\nN\u00b7m\/arcmin<\/td>\n0.7<\/td>\n1.8<\/td>\n4.5<\/td>\n12<\/td>\n38<\/td>\n<\/tr>\n
Noise (idle, 3,000 rpm, 1 m)<\/td>\ndB(A)<\/td>\n55<\/td>\n58<\/td>\n60<\/td>\n65<\/td>\n70<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u2463 General Specifications<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\n\u03a0\u03c1\u03bf\u03c3\u03b4\u03b9\u03bf\u03c1\u03b9\u03c3\u03bc\u03cc\u03c2<\/th>\n<\/tr>\n<\/thead>\n
Operating temperature<\/td>\n\u221225\u00b0C to +90\u00b0C<\/td>\n<\/tr>\n
Protection rating<\/td>\nIP54 (IEC 60529) \u2014 dust-tight, splash-protected from any direction<\/td>\n<\/tr>\n
\u039b\u03ac\u03b4\u03c9\u03bc\u03b1<\/td>\nLifetime lubrication \u2014 factory-sealed, no re-greasing required<\/td>\n<\/tr>\n
Mounting orientation<\/td>\nAny \u2014 horizontal, vertical shaft-up\/down, inverted, any inclined angle<\/td>\n<\/tr>\n
Input shaft clamping types<\/td>\nS: integral locking (default) \u00b7 S1: locking ring \u00b7 S2: keyway + clamping \u00b7 K: keyway \u00b7 A: custom<\/td>\n<\/tr>\n
Output shaft tolerance<\/td>\nh7 \u2014 all frame sizes<\/td>\n<\/tr>\n
Backlash measurement standard<\/td>\nMeasured at \u00b13% of allowable output torque on output shaft<\/td>\n<\/tr>\n
Rated service life<\/td>\n20,000 hours at rated load (L10 bearing life calculation)<\/td>\n<\/tr>\n
Instant stop torque<\/td>\n2\u00d7 rated output torque<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

<\/p>\n

\n

EP-ZDE Series \u2014 Mechanical Dimensions (Unit: mm)<\/h2>\n

\"EP-ZDE<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Dimension<\/th>\n40ZDE<\/th>\n60ZDE<\/th>\n80ZDE<\/th>\n120ZDE<\/th>\n160ZDE<\/th>\n<\/tr>\n<\/thead>\n
Overall length L1 \u2014 1-stage<\/td>\n93.5<\/td>\n113.5<\/td>\n144<\/td>\n195.2<\/td>\n291<\/td>\n<\/tr>\n
Overall length L1 \u2014 2-stage<\/td>\n106.5<\/td>\n126.5<\/td>\n162<\/td>\n223<\/td>\n\u2014<\/td>\n<\/tr>\n
Overall length L1 \u2014 3-stage<\/td>\n119<\/td>\n139<\/td>\n179.5<\/td>\n250.5<\/td>\n340.5<\/td>\n<\/tr>\n
Output shaft length L4<\/td>\n26<\/td>\n35<\/td>\n40<\/td>\n55<\/td>\n87<\/td>\n<\/tr>\n
Output shaft diameter D4<\/td>\n\u03a610h7<\/td>\n\u03a614h7<\/td>\n\u03a620h7<\/td>\n\u03a625h7<\/td>\n\u03a640h7<\/td>\n<\/tr>\n
Shaft shoulder diameter D5<\/td>\n\u03a612<\/td>\n\u03a617<\/td>\n\u03a625<\/td>\n\u03a635<\/td>\n\u03a655<\/td>\n<\/tr>\n
Body diameter D7<\/td>\n\u03a640<\/td>\n\u03a660<\/td>\n\u03a680<\/td>\n\u03a6115<\/td>\n\u03a6160<\/td>\n<\/tr>\n
Mounting hole PCD D8<\/td>\n\u03a634<\/td>\n\u03a652<\/td>\n\u03a670<\/td>\n\u03a6100<\/td>\n\u03a6145<\/td>\n<\/tr>\n
Keyway width B1<\/td>\n3<\/td>\n5<\/td>\n6<\/td>\n8<\/td>\n12<\/td>\n<\/tr>\n
Key height H1<\/td>\n11.2<\/td>\n16<\/td>\n22.5<\/td>\n28<\/td>\n43<\/td>\n<\/tr>\n
Mounting screw G2<\/td>\nM4\u00d76<\/td>\nM5\u00d78<\/td>\nM6\u00d710<\/td>\nM10\u00d716<\/td>\nM12\u00d720<\/td>\n<\/tr>\n
Input flange length L2<\/td>\n28.5<\/td>\n32<\/td>\n44<\/td>\n66.5<\/td>\n99<\/td>\n<\/tr>\n
Motor shaft accommodation L9<\/td>\n26<\/td>\n30<\/td>\n40<\/td>\n58<\/td>\n79<\/td>\n<\/tr>\n
Input mounting PCD D1<\/td>\n\u03a646<\/td>\n\u03a670<\/td>\n\u03a690<\/td>\n\u03a6145<\/td>\n\u03a6200<\/td>\n<\/tr>\n
Input flange Q3 (square)<\/td>\n\u25a140<\/td>\n\u25a160<\/td>\n\u25a180<\/td>\n\u25a1130<\/td>\n\u25a1175<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\u25b8 Custom input flange \u2014 for any planetary gearbox ratio 3:1 to 512:1 and frame size 40\u2013160 mm: <\/span>
\nInput-end dimensions are manufactured to match the specific servo motor. Provide motor model number (LS Mecapion, Panasonic, Yaskawa, Mitsubishi, Delta, Inovance, or others) and Korea Ever-Power confirms the input flange specification before manufacture.<\/span><\/div>\n<\/section>\n
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The Precision Clamping Input \u2014 Why It Matters for Servo Backlash<\/h2>\n

\"Planerary<\/p>\n

\n
\n
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KEYED \/ SPLINED INPUT (STANDARD)<\/p>\n

[Motor shaft]\u2500\u2500[Key fit]\u2500\u2500[Sun gear]
\nFit clearance: 0.01\u20130.03 mm
\n\u2192 Adds directly to backlash
\n\u2192 Fretting wear over time
\n\u2192 Motor swap = re-check fit<\/div>\n

EP-ZDE PRECISION CLAMPING INPUT<\/p>\n

[Motor shaft]\u2500\u2500[Clamp hub]\u2500\u2500[Sun gear]
\nZero fit clearance \u2014 uniform grip
\n\u2192 Works with or without keyway
\n\u2192 No fretting, no fit degradation
\n\u2192 Swap motor in 40 min less time<\/div>\n<\/div>\n<\/div>\n
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Three Engineering Advantages of the EP-ZDE Clamping Input<\/h3>\n
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\u2460 Zero-Clearance Motor Coupling \u2014 Preserves the <8 arcmin Backlash<\/strong><\/p>\n

A standard keyed motor coupling introduces 0.01\u20130.03 mm of fit clearance at the sun gear. On a 40 mm frame with a 10 mm pitch circle, 0.02 mm clearance adds ~4 arcmin of effective backlash before the planetary stage contributes. The EP-ZDE precision clamping hub grips the motor shaft uniformly with zero radial clearance, eliminating this entirely. The <8 arcmin specification covers the full assembly \u2014 gearbox + clamped motor coupling \u2014 not just the gear stage. Korean servo engineers specifying sub-10-arcmin systems for PCB drilling and wafer handling can rely on this as a system-level guarantee.<\/p>\n<\/div>\n

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\u2461 Universal Compatibility \u2014 Works With or Without Motor Shaft Keyway<\/strong><\/p>\n

The clamping input applies uniform radial compressive force \u2014 not dependent on a keyway. Korean automation engineers replacing servo motors (e.g. upgrading from LS Mecapion to Panasonic A6 series) frequently encounter shaft length or keyway position differences between models. The EP-ZDE clamping input accommodates both shafts without modification, reducing motor replacement downtime. For applications requiring additional torque backup under high shock loads, the S2 variant adds a keyway to the clamped connection.<\/p>\n<\/div>\n

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\u2462 Long-Term Backlash Stability \u2014 No Fretting Wear on the Input Shaft<\/strong><\/p>\n

A loosely keyed motor shaft undergoes fretting corrosion at the key contact surfaces under cyclic torque reversal \u2014 a common failure mode in Korean servo axis gearboxes used in pick-and-place machines with frequent direction changes. Fretting progressively enlarges fit clearance, causing effective backlash to increase until axis positioning error exceeds the machine tolerance. The EP-ZDE clamping input eliminates the key contact interface entirely. Korean factory engineers report EP-ZDE gearboxes maintaining out-of-box backlash for 18\u201324 months in SMT placement machine Z-axis applications.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

EP-ZDE vs EP-ZDF \u2014 Choosing the Right Flange Type<\/h3>\n
\n\n\n\n\n\n\n\n\n\n
Criterion<\/th>\nEP-ZDE \u2014 Round Flange \u2605<\/th>\nEP-ZDF \u2014 Square Flange<\/a><\/th>\n<\/tr>\n<\/thead>\n
Output flange geometry<\/td>\nCylindrical body D7 (\u03a640\u2013\u03a6160 mm), round mounting bore<\/td>\nSquare flange D7 (\u25a145\u2013\u25a1175 mm), 4 through-bolt face mount<\/td>\n<\/tr>\n
Typical mounting method<\/td>\nInserted into round bore \u2014 4\u00d7G2 mounting screws on output face<\/td>\nBolted to flat plate face \u2014 bracket or plate-mount designs<\/td>\n<\/tr>\n
Gear internals & torque<\/td>\nIdentical \u2014 same planetary stages, same rated torque, same backlash per stage<\/td>\n<\/tr>\n
Best for Korean application<\/td>\nCNC axis drives, robot joints, laser gantries \u2014 standard bore mount<\/td>\nConveyor drives, panel handling \u2014 bracket or plate mount preferred<\/td>\n<\/tr>\n
Backlash \/ Efficiency \/ IP<\/td>\nIdentical \u2014 <8 arcmin 1-stage \u00b7 96% single-stage \u00b7 IP54 \u00b7 \u221225\u00b0C to +90\u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

<\/p>\n

\n

<\/h2>\n<\/section>\n

<\/p>\n

\n

Installation Guide \u2014 EP-ZDE Series<\/h2>\n
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Mounting Orientation \u2014 Planetary Gearbox Any Mounting Orientation, No Restrictions<\/h3>\n

The EP-ZDE series uses factory-sealed lifetime grease \u2014 there is no oil sump or gravity-dependent lubrication path. The sealed grease remains distributed across all gear and bearing contact surfaces regardless of mounting angle. Install in any of the orientations below without lubrication modification or additional hardware.<\/p>\n

\n
\n
\u27a1\ufe0f<\/div>\n
\u039f\u03c1\u03b9\u03b6\u03cc\u03bd\u03c4\u03b9\u03bf\u03c2<\/div>\n
Standard for gantry and conveyor axes<\/div>\n<\/div>\n
\n
\u2b06\ufe0f<\/div>\n
\u039a\u03ac\u03b8\u03b5\u03c4\u03b7 \u03b1\u03bd\u03cd\u03c8\u03c9\u03c3\u03b7 \u03ac\u03be\u03bf\u03bd\u03b1<\/div>\n
Motor below, shaft up \u2014 rotary tables, Z-axis drives<\/div>\n<\/div>\n
\n
\u2b07\ufe0f<\/div>\n
\u039a\u03ac\u03b8\u03b5\u03c4\u03bf\u03c2 \u03ac\u03be\u03bf\u03bd\u03b1\u03c2 \u03c0\u03c1\u03bf\u03c2 \u03c4\u03b1 \u03ba\u03ac\u03c4\u03c9<\/div>\n
Motor above, shaft down \u2014 drilling spindles, hanging robot axes<\/div>\n<\/div>\n
\n
\ud83d\udd04<\/div>\n
Inverted<\/div>\n
Motor above facing down \u2014 overhead conveyor and crane drives<\/div>\n<\/div>\n
\n
\u2197\ufe0f<\/div>\n
Any Inclined Angle<\/div>\n
Solar trackers, inclined conveyors \u2014 any angle, no limits<\/div>\n<\/div>\n<\/div>\n

Step-by-Step Installation Procedure<\/h3>\n

\"Planerary<\/p>\n

\n
\n
\n
1<\/div>\n

Pre-Installation Inspection<\/strong><\/p>\n<\/div>\n

Verify the model code: frame size (40\u2013160), gear ratio (3:1\u2013512:1), input flange square size Q3. Confirm the output shaft diameter D4 matches your coupling bore. Check that Q3 matches the servo motor front face dimension. Do not perform any rework on the factory-ground output shaft surface \u2014 h7 tolerance is verified at manufacture.<\/p>\n<\/div>\n

\n
\n
2<\/div>\n

Motor Coupling \u2014 Clamping Input (S-type)<\/strong><\/p>\n<\/div>\n

Insert the servo motor shaft fully into the gearbox input bore until the motor face contacts the input flange squarely. Tighten the integral locking screws evenly in a cross pattern to the specified torque. The clamping input works with or without a motor shaft keyway \u2014 no fit matching required. For S1 locking-ring type, compress the ring uniformly using the provided tightening tool.<\/p>\n<\/div>\n

\n
\n
3<\/div>\n

Mounting to Machine Frame<\/strong><\/p>\n<\/div>\n

Align the gearbox spigot D6 with the machine bore for a close-running fit. Install the 4\u00d7G2 mounting screws and torque evenly. Ensure mounting surface flatness is within 0.02 mm to avoid bearing preload stress. The central G3 screw hole provides additional axial retention for pull-out resistance where required by the application.<\/p>\n<\/div>\n

\n
\n
4<\/div>\n

Output Shaft Connection<\/strong><\/p>\n<\/div>\n

Connect the load via a rigid or semi-rigid coupling onto the h7 output shaft D4. Install the key (width B1) with a sliding fit \u2014 do not hammer. For press-fit coupling hubs, warm the hub to 80\u2013100\u00b0C before pressing to avoid bearing overload. Mount the driven component as close to the output bearing as possible to minimise the bending moment arm.<\/p>\n<\/div>\n

\n
\n
5<\/div>\n

Load Verification<\/strong><\/p>\n<\/div>\n

Confirm applied radial load does not exceed the max radial force at shaft centre (L\/2) \u2014 e.g. 900 N for EP-ZDE-80. Axial thrust must remain below max axial force. For combined radial + axial loads, calculate equivalent bearing load: Fe = \u221a(Fr\u00b2 + Fa\u00b2) and verify Fe \u2264 rated radial force. Cantilevered loads at the shaft end generate higher effective bearing loads than the tabulated L\/2 values.<\/p>\n<\/div>\n

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6<\/div>\n

No-Load Run-In & Backlash Verification<\/strong><\/p>\n<\/div>\n

Run at no-load for 30 minutes at \u226450% rated input speed. Monitor for unusual vibration or noise. Confirm housing temperature does not exceed ambient +90\u00b0C. After run-in, verify system backlash via servo drive position feedback \u2014 confirm \u22648 arcmin at the output for 1-stage frame 60\u2013160 units. Record this as the installation baseline for condition monitoring over the 20,000-hour life.<\/p>\n<\/div>\n<\/div>\n

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\u26a0 Installation Cautions:<\/strong> Do not apply external impact or axial force to the output shaft or input flange during installation \u2014 use proper pressing tools only. Do not operate with the protective end-cap removed. Rated radial and axial forces are measured at output shaft centre position (L\/2); loads applied at the shaft end impose higher effective bearing loads. Never exceed 4,500 rpm input speed. The sealed housing has no grease port \u2014 do not attempt external lubrication.<\/p>\n<\/div>\n

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\u2714 Zero Maintenance Confirmation:<\/strong> EP-ZDE uses factory-sealed lifetime lubrication. No re-greasing, no oil changes, no scheduled lubrication intervals are required over the 20,000-hour rated life. The only recommended periodic check is a visual inspection of the output shaft lip seal every 5,000 hours to confirm no contamination ingress. For storage exceeding 6 months before installation, rotate the input shaft by hand monthly to redistribute the grease.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Applications \u2014 EP-ZDE Precision Planetary Gearbox for CNC Machine, Robot & Semiconductor Equipment in Korean Industry<\/h2>\n

\"\u03a0\u03bb\u03b1\u03bd\u03b7\u03c4\u03b9\u03ba\u03ac<\/p>\n

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CNC Machining Centres \u2014 Rotary Table & Axis Drives<\/h3>\n

Korean CNC machining centre OEMs use EP-ZDE-120 at 20:1 two-stage for A- and B-axis rotary table drives and 4th-axis indexing heads. The <8 arcmin single-stage backlash at 100\u2013260 N\u00b7m rated torque (120-frame) provides the positioning accuracy required for Korean tier-1 automotive mould and aerospace part machining. For right-angle motor layout requirements in compact machine tool headstocks, see the EP-ZDWE right-angle input series<\/a>.<\/p>\n<\/div>\n

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Industrial Robots \u2014 6-Axis Joint & SCARA Drives<\/h3>\n

Korean collaborative and industrial robot manufacturers use EP-ZDE-60 and EP-ZDE-80 for wrist and elbow joint drives. The compact cylindrical body (\u03a660\u2013\u03a680 mm) integrates directly into the robot arm cross-section. At 0.9\u20132.1 kg for single-stage units, EP-ZDE contributes minimal link weight while delivering 12\u2013120 N\u00b7m rated output torque \u2014 covering Korean 5 kg to 20 kg payload collaborative robot joint specifications. The <8 arcmin backlash is compliant with ISO 10218-1 joint positioning requirements for Korean safety-rated collaborative robot cells.<\/p>\n<\/div>\n

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Semiconductor & Display Panel Equipment<\/h3>\n

Korean semiconductor fab equipment engineers specify EP-ZDE-40 and EP-ZDE-60 for wafer handling robot stage drives and die-bonding arm positioning. At 40 mm frame with 0.4 kg weight, EP-ZDE-40 is the lowest-inertia option in the series \u2014 critical for high-acceleration, short-stroke wafer transport cycles. The lifetime-sealed grease passes cleanroom particle contamination tests (ISO 14644-1 Class 7 environment), eliminating the re-lubrication events that require temporary cleanroom tenting around the machine in Korean semiconductor facilities in Hwaseong, Icheon, and Pyeongtaek.<\/p>\n<\/div>\n

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Laser Cutting Systems \u2014 High-Speed Gantry Axes<\/h3>\n

Korean fibre laser cutting system manufacturers use EP-ZDE-80 for XY gantry servo drive axes at feed rates of 60\u2013120 m\/min. The 4,500 rpm maximum input speed supports high-speed positioning cycles without the gearbox limiting cycle time. IP54 protection resists metallic particulate and oil mist generated at Korean laser cutting installations. For rack-and-pinion gantry configurations requiring rapid pinion replacement.<\/p>\n<\/div>\n

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Packaging & Food Processing Lines<\/h3>\n

Korean food and beverage packaging OEMs specify EP-ZDE-60 and EP-ZDE-80 for servo-driven filling, sealing, and labelling axes. The IP54 sealed housing resists cleaning solution splash and food-grade detergent mist in Korean HACCP-certified production environments. Lifetime lubrication eliminates grease leakage contamination risk \u2014 a compliance requirement under Korean Food Safety Management certification. At 3-shift operation, the 20,000-hour rated life corresponds to approximately 5\u20136 years before scheduled replacement.<\/p>\n<\/div>\n

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Electronic SMT Assembly & PCB Drilling<\/h3>\n

Korean SMT pick-and-place equipment manufacturers use EP-ZDE-40 for Z-axis placement head vertical drive and theta-axis nozzle rotation. The <12 arcmin backlash (40-frame, 1-stage) at 4.5\u20136 N\u00b7m covers standard SMT chip and connector placement accuracy requirements. For PCB drilling machines, EP-ZDE-60 at 3:1 or 4:1 single-stage drives the drill spindle feed axis. Korean PCB manufacturers in Gumi and Changwon report EP-ZDE-60 achieving >20 months continuous operation between scheduled maintenance checks.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Quality Certifications & Testing Standards<\/h2>\n
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ISO 9001<\/div>\n
Quality Management<\/div>\n<\/div>\n
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CE<\/div>\n
EU Machinery Directive<\/div>\n<\/div>\n
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KS<\/div>\n
Korean Industrial Standard<\/div>\n<\/div>\n
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RoHS<\/div>\n
Hazardous Substance Free<\/div>\n<\/div>\n<\/div>\n