{"id":687,"date":"2026-06-01T03:57:36","date_gmt":"2026-06-01T03:57:36","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=687"},"modified":"2026-06-01T03:57:36","modified_gmt":"2026-06-01T03:57:36","slug":"ep-zdf-series-square-flange-precision-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/ja\/product\/ep-zdf-series-square-flange-precision-planetary-gearbox\/","title":{"rendered":"EP-ZDF Series Square-Flange Precision Planetary Gearbox \u2014 Low-Backlash Servo Gearbox"},"content":{"rendered":"
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<\/p>\n

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

\n
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<8 arcmin<\/div>\n
Single-stage backlash<\/div>\n<\/div>\n
\n
800 N\u00b7m<\/div>\n
Max output torque<\/div>\n<\/div>\n
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\u25a145\u2013\u25a1175<\/div>\n
Square flange (mm)<\/div>\n<\/div>\n
\n
IP54<\/div>\n
\u751f\u6daf\u6f64\u6ed1<\/div>\n<\/div>\n<\/div>\n
\u2190 Browse All Planetary Gearbox Series<\/a><\/div>\n<\/div>\n
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\u2605 Square-Flange Face-Mount Precision Planetary Gearbox \u2014 No Bore Machining Required, 4-Bolt Direct Plate Attachment<\/div>\n

EP-ZDF shares identical gear stages, torque ratings, and <8 arcmin backlash with the round-flange EP-ZDE planetary gearbox<\/a>, but replaces the cylindrical housing with a square output flange (\u25a145\u2013\u25a1175 mm)<\/strong> that attaches directly to any flat machine surface with 4 through-bolts \u2014 eliminating the precision bore that EP-ZDE requires. For Korean OEM machine builders who use flat mounting plates, brackets, or aluminium extrusion frames as the primary machine structure, EP-ZDF is the more installation-efficient choice.<\/p>\n<\/div>\n

The EP-ZDF series square-flange precision planetary gearbox<\/strong> from Korea Ever-Power is the plate-mount variant of the EP-ZDE inline \u30b5\u30fc\u30dc\u904a\u661f\u30ae\u30a2\u30dc\u30c3\u30af\u30b9<\/strong> family. The square output flange face-mounts against any flat machine plate \u2014 no circular bore, no spigot alignment, no bore-tolerance matching required. Four through-bolt holes on the flange face (diameter D9: \u03a63.5\u2013\u03a613.5 mm depending on frame) attach the gearbox rigidly to the machine structure. The flat-face contact distributes the output reaction torque across the four bolt pattern rather than through a bore fit, making EP-ZDF the preferred choice for Korean OEM conveyor systems, automated panel handling, and bracket-mounted servo actuator designs.<\/p>\n

Internally, EP-ZDF is identical to EP-ZDE: same case-hardened alloy steel planetary gears, same angular contact output bearing pair, same precision clamping input system, same factory-sealed lifetime grease lubrication. The <8 arcmin backlash specification (1-stage, frame 60\u2013160), 96% single-stage efficiency, 20,000-hour rated service life, IP54 protection, and \u221225\u00b0C to +90\u00b0C operating range are identical between the two series. Korean engineers migrating a design from EP-ZDE to EP-ZDF only need to update the machine plate hole pattern \u2014 the input flange, gear ratio, and torque ratings remain unchanged.<\/p>\n

\n
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\u25a1 Square Flange Mount<\/div>\n
4 through-bolts on flat plate \u2014 no precision bore required.<\/div>\n<\/div>\n
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\ud83c\udfaf <8 arcmin Backlash<\/div>\n
Same as EP-ZDE \u2014 1-stage, frame 60\u2013160 mm.<\/div>\n<\/div>\n
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\u2195 Any Orientation<\/div>\n
Horizontal, vertical, inverted, any angle \u2014 no lubrication restrictions.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

<\/section>\n

 <\/p>\n

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EP-ZDF 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
\u6bd4\u7387<\/th>\n\u30b9\u30c6\u30fc\u30b8<\/th>\nZDF-40<\/th>\nZDF-60<\/th>\nZDF-80<\/th>\nZDF-120<\/th>\nZDF-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>Rated service life = 20,000 hours. All torque values in N\u00b7m. 3-stage not available for ZDF-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>\n\u30e6\u30cb\u30c3\u30c8<\/th>\nZDF-40<\/th>\nZDF-60<\/th>\nZDF-80<\/th>\nZDF-120<\/th>\nZDF-160<\/th>\n<\/tr>\n<\/thead>\n
Max radial force<\/td>\n\u5317<\/td>\n160<\/td>\n450<\/td>\n900<\/td>\n2,100<\/td>\n6,000<\/td>\n<\/tr>\n
Max axial force<\/td>\n\u5317<\/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>\nkg<\/td>\n0.4<\/td>\n0.9<\/td>\n2.1<\/td>\n6<\/td>\n18<\/td>\n<\/tr>\n
Weight \u2014 2-stage<\/td>\nkg<\/td>\n0.5<\/td>\n1.1<\/td>\n2.6<\/td>\n8<\/td>\n22<\/td>\n<\/tr>\n
Weight \u2014 3-stage<\/td>\nkg<\/td>\n0.6<\/td>\n1.3<\/td>\n3.1<\/td>\n9.5<\/td>\n\u2014<\/td>\n<\/tr>\n
\u6700\u5927\u5165\u529b\u901f\u5ea6<\/td>\n\u56de\u8ee2\u6570<\/td>\n4,500<\/td>\n<\/tr>\n
Recommended input speed<\/td>\n\u56de\u8ee2\u6570<\/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>\n\u30e6\u30cb\u30c3\u30c8<\/th>\nZDF-40<\/th>\nZDF-60<\/th>\nZDF-80<\/th>\nZDF-120<\/th>\nZDF-160<\/th>\n<\/tr>\n<\/thead>\n
Backlash \u2014 1-stage<\/td>\n\u30a2\u30fc\u30af\u30b9\u30df\u30f3<\/td>\n<12<\/td>\n<8<\/td>\n<8<\/td>\n<8<\/td>\n<8<\/td>\n<\/tr>\n
Backlash \u2014 2-stage<\/td>\n\u30a2\u30fc\u30af\u30b9\u30df\u30f3<\/td>\n<15<\/td>\n<12<\/td>\n<12<\/td>\n<12<\/td>\n<12<\/td>\n<\/tr>\n
Backlash \u2014 3-stage<\/td>\n\u30a2\u30fc\u30af\u30b9\u30df\u30f3<\/td>\n<18<\/td>\n<15<\/td>\n<15<\/td>\n<15<\/td>\n\u2014<\/td>\n<\/tr>\n
\u306d\u3058\u308a\u525b\u6027<\/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>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
\u52d5\u4f5c\u6e29\u5ea6<\/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
\u6f64\u6ed1<\/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)<\/td>\n<\/tr>\n
\u77ac\u6642\u505c\u6b62\u30c8\u30eb\u30af<\/td>\n2\u00d7 rated output torque<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

<\/p>\n

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

EP-ZDF shares all body and input dimensions with EP-ZDE. The table below lists the output flange-specific dimensions that differ between the two series, plus the shared shaft and input dimensions for convenience.<\/p>\n

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

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Dimension<\/th>\n40ZDF<\/th>\n60ZDF<\/th>\n80ZDF<\/th>\n120ZDF<\/th>\n160ZDF<\/th>\n<\/tr>\n<\/thead>\n
Square flange size D7<\/td>\n\u25a145<\/td>\n\u25a160<\/td>\n\u25a190<\/td>\n\u25a1120<\/td>\n\u25a1160 \/ \u25a1175<\/td>\n<\/tr>\n
Bolt-hole PCD D8<\/td>\n\u03a650<\/td>\n\u03a670<\/td>\n\u03a6100<\/td>\n\u03a6130<\/td>\n\u03a6185 \/ \u03a6200<\/td>\n<\/tr>\n
Through-bolt hole diameter D9<\/td>\n\u03a63.5<\/td>\n\u03a65.5<\/td>\n\u03a66.5<\/td>\n\u03a68.5<\/td>\n\u03a611 \/ \u03a613.5<\/td>\n<\/tr>\n
Flange thickness L11<\/td>\n6<\/td>\n8<\/td>\n10<\/td>\n15<\/td>\n15<\/td>\n<\/tr>\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
Keyway width B1<\/td>\n3<\/td>\n5<\/td>\n6<\/td>\n8<\/td>\n12<\/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 The EP-ZDF low-backlash planetary gearbox<\/strong> \u2014 green rows are ZDF-specific flange dimensions. <\/span>160ZDF has two flange size options (\u25a1160 and \u25a1175) to accommodate different machine plate hole patterns. All input-end dimensions are identical to EP-ZDE and are manufactured to match the specific servo motor model on order.<\/span><\/div>\n<\/section>\n
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The Square Flange \u2014 Why It Matters for Korean Machine Plate Designs<\/h2>\n

\"Planerary<\/p>\n

\n
\n
\n

ROUND-FLANGE MOUNT (EP-ZDE)<\/p>\n

[Machine plate]
\n\u2502
\n[Bore \u03a640\u2013\u03a6160 mm] \u2190 precision bore
\n\u2502 required
\n[ZDE spigot fit]
\n\u2502
\n4\u00d7G2 screws on faceInstallation requires:
\n\u2022 Boring \/ milling round pocket
\n\u2022 h7 bore tolerance check
\n\u2022 Spigot alignment on insertion<\/div>\n

SQUARE-FLANGE MOUNT (EP-ZDF) \u2605<\/p>\n

[Machine plate \/ bracket]
\n\u2502
\n[\u25a145\u2013\u25a1175 mm flat face] \u2190 any flat surface
\n\u2502
\n4 through-bolts D9Installation requires:
\n\u2022 4 bolt holes \u2014 standard drill
\n\u2022 No bore tolerance, no spigot
\n\u2022 Drop-in, bolt-down, done<\/div>\n<\/div>\n<\/div>\n
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Three Installation Advantages of the EP-ZDF Square Flange<\/h3>\n
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\u2460 No Precision Bore Required \u2014 Any Flat Surface Is a Valid Mount<\/strong><\/p>\n

EP-ZDE’s round cylindrical body requires a precision circular bore in the machine plate \u2014 typically bored or milled to H7 tolerance, which requires a machining operation on the machine frame after all other features are complete. For Korean OEM machine builders working with welded steel frames, extruded aluminium profiles, or cast housings where a precision round bore adds a non-trivial machining step, EP-ZDF eliminates this entirely. The square flange face mounts against any flat surface and is secured with 4 standard drill-and-tap holes at the bolt-hole pattern diameter D8. No bore tolerance specification, no concentricity check, no spigot fit required.<\/p>\n<\/div>\n

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\u2461 Rigid Torque Reaction via 4-Bolt Pattern \u2014 No Bore Slip Risk<\/strong><\/p>\n

In a bore-mounted gearbox such as EP-ZDE, the output reaction torque is transmitted through the spigot fit into the bore wall \u2014 if the bore fit is oversized or the screws are under-torqued, the gearbox can micro-rotate within the bore under cyclic torque reversal, progressively enlarging the fit clearance. The EP-ZDF square flange transmits the output reaction torque directly through the 4 through-bolt clamping force against the plate face, with no spigot slip mechanism. Korean servo press, indexing table, and packaging machine drives that experience cyclic torque reversal benefit from the definitive mechanical locking that the bolt-pattern provides.<\/p>\n<\/div>\n

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\u2462 Direct Drop-In Retrofit \u2014 Replaces Competitor Square-Flange Gearboxes<\/strong><\/p>\n

Korean machine builders replacing worn or end-of-life square-flange gearboxes from other manufacturers can often use EP-ZDF as a direct retrofit by matching the flange size (\u25a145\u2013\u25a1175 mm) and bolt-hole pattern (D8 and D9 dimensions) \u2014 without modifying the machine plate. Korea Ever-Power provides dimensional compatibility checks against common competitor square-flange sizes on request. The EP-ZDF precision clamping input accommodates the existing servo motor shaft without modification, making the retrofit a drop-in mechanical replacement that maintains the original servo motor and cable connections.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

EP-ZDE vs EP-ZDF \u2014 Full Comparison for Korean Application Selection<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n
Criterion<\/th>\nEP-ZDE \u2014 Round Flange<\/a><\/th>\nEP-ZDF \u2014 Square Flange \u2605<\/th>\n<\/tr>\n<\/thead>\n
Output flange geometry<\/td>\nCylindrical body D7 \u03a640\u2013\u03a6160 mm, inserts into round bore<\/td>\nSquare flange D7 \u25a145\u2013\u25a1175 mm, bolts to flat plate face<\/td>\n<\/tr>\n
Machine plate requirement<\/td>\nPrecision bore H7 \u2014 machining operation required<\/td>\nFlat surface + 4 drill-and-tap holes \u2014 no bore tolerance<\/td>\n<\/tr>\n
Torque reaction path<\/td>\nSpigot fit into bore wall + 4\u00d7G2 face screws<\/td>\n4 through-bolt clamping force \u2014 no bore slip mechanism<\/td>\n<\/tr>\n
Best Korean application<\/td>\nCNC spindle heads, robot joints, bore-mount machine drives<\/td>\nConveyor drives, bracket actuators, flat-plate OEM machines<\/td>\n<\/tr>\n
Retrofit compatibility<\/td>\nMatch bore diameter and spigot OD<\/td>\nMatch square flange size \u25a1 and bolt pattern \u2014 often drop-in<\/td>\n<\/tr>\n
Gear internals & torque<\/td>\nIdentical \u2014 same planetary stages, same rated torque, same <8 arcmin backlash per stage<\/td>\n<\/tr>\n
Efficiency \/ IP \/ Lubrication<\/td>\nIdentical \u2014 96% 1-stage \u00b7 IP54 \u00b7 Lifetime sealed grease \u00b7 \u221225\u00b0C to +90\u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

 <\/p>\n

<\/p>\n

\n

Installation Guide \u2014 EP-ZDF Square-Flange Series<\/h2>\n
\n

Square Flange Mounting \u2014 Any Flat Surface, Any Orientation<\/h3>\n

The EP-ZDF square flange face-mounts directly to any flat machine surface. The factory-sealed lifetime grease means orientation is unrestricted \u2014 install at any angle without lubrication modification. The flange contact face must be clean and flat to within 0.02 mm to ensure uniform bolt preload across the four mounting holes.<\/p>\n

\n
\n
\ud83d\udd32<\/div>\n
Flat Plate<\/div>\n
Steel bracket or aluminium plate \u2014 4 bolt holes, no bore required<\/div>\n<\/div>\n
\n
\ud83c\udfd7\ufe0f<\/div>\n
Welded Frame<\/div>\n
Welded steel machine frames \u2014 no post-weld boring needed<\/div>\n<\/div>\n
\n
\ud83d\udd29<\/div>\n
Extrusion Profile<\/div>\n
Aluminium profile systems \u2014 T-slot or face-drilled mounting<\/div>\n<\/div>\n
\n
\ud83d\udd04<\/div>\n
Any Orientation<\/div>\n
Horizontal, vertical, inverted, any angle \u2014 sealed grease, unrestricted<\/div>\n<\/div>\n<\/div>\n

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

\"Planerary<\/p>\n

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

Verify Model & Flange Size<\/strong><\/p>\n<\/div>\n

Confirm the EP-ZDF model code: frame size (40\u2013160), square flange size D7 (\u25a145\u2013\u25a1175), bolt-hole PCD D8, and through-bolt hole D9. Verify the flange size matches the machine plate hole pattern. Confirm the input flange square Q3 matches the servo motor front face dimension. Check that the output shaft diameter D4 matches your coupling bore tolerance h7.<\/p>\n<\/div>\n

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

Prepare the Machine Plate<\/strong><\/p>\n<\/div>\n

Drill and tap 4 mounting holes in the machine plate at the bolt-hole PCD D8, using through-bolt diameter D9 as the clearance hole. Ensure the plate mounting surface flatness is within 0.02 mm \u2014 use a surface gauge or precision straight edge to verify. Clean the surface to remove burrs, scale, or paint ridges that would prevent full flange face contact. No bore is required \u2014 the square flange does not have a spigot.<\/p>\n<\/div>\n

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

Motor Coupling \u2014 Clamping Input<\/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. For S-type: tighten integral locking screws evenly in a cross pattern. For S1 locking ring: compress the ring uniformly with the provided tool. The clamping input works with or without a motor shaft keyway \u2014 no fit tolerance matching required between the motor shaft and the input hub.<\/p>\n<\/div>\n

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

Flange Face Mounting \u2014 4-Bolt Pattern<\/strong><\/p>\n<\/div>\n

Place the gearbox square flange face against the machine plate, aligning the 4 through-bolt holes D9 with the plate hole pattern. Insert the 4 bolts (class 8.8 or higher recommended) and hand-tighten. Verify the flange face is fully seated against the plate with no visible gap. Torque the 4 bolts evenly in a cross pattern to the specified torque for the bolt class and diameter. Full face contact ensures the output reaction torque is distributed uniformly across the bolt clamping force.<\/p>\n<\/div>\n

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

Output Shaft Connection & Load Check<\/strong><\/p>\n<\/div>\n

Connect the load coupling to the h7 output shaft D4. Install the key (width B1) with a sliding fit \u2014 do not hammer. For press-fit hubs, warm to 80\u2013100\u00b0C. Confirm applied radial load does not exceed the max radial force at shaft centre (L\/2) \u2014 e.g. 900 N for EP-ZDF-80. Mount the driven component as close to the output bearing as possible to minimise the bending moment arm on D4.<\/p>\n<\/div>\n

\n
\n
6<\/div>\n

No-Load Run-In & Bolt Re-torque Check<\/strong><\/p>\n<\/div>\n

Run at no-load for 30 minutes at \u226450% rated input speed. After run-in, re-check the 4 flange bolt torque values \u2014 thermal cycling during run-in can cause slight bolt relaxation in bolted flange joints. Verify system backlash via servo drive position feedback \u2014 confirm \u22648 arcmin for 1-stage frame 60\u2013160 units. Record this as the installation baseline for the 20,000-hour monitoring period.<\/p>\n<\/div>\n<\/div>\n

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\u26a0 Installation Cautions:<\/strong> The square flange face must have full contact with the machine plate \u2014 a gap on one side concentrates bolt load and can cause flange fatigue. Do not weld or heat the gearbox housing. The sealed housing has no grease port \u2014 do not attempt external lubrication. Never exceed 4,500 rpm input speed. Do not apply impact force to the output shaft or input flange during installation.<\/p>\n<\/div>\n

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\u2714 Zero Maintenance \u2014 Retrofit Tip:<\/strong> When retrofitting EP-ZDF in place of a previous square-flange gearbox, match the flange size D7 (\u25a1) and bolt-hole PCD D8. If the previous gearbox had a grease nipple that was periodically serviced, EP-ZDF eliminates that maintenance step entirely \u2014 no plugging or capping of the old grease port location is needed on the EP-ZDF unit.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Applications \u2014 EP-ZDF Square-Flange Planetary Gearbox for Plate-Mount Drives in Korean Industry<\/h2>\n
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Conveyor & Material Handling Systems<\/h3>\n

Korean automated warehouse, logistics, and production line conveyor systems use EP-ZDF-60 and EP-ZDF-80 as the servo gear reducer for belt-drive head pulleys and roller conveyors. The square flange bolts directly to the conveyor frame side plate \u2014 no precision bore in the structural steel section, just 4 drill-and-tap holes. At 3-shift operation rates typical in Korean e-commerce fulfilment centres, the 20,000-hour rated life and zero re-lubrication design reduces conveyor maintenance costs significantly compared to open-frame worm gear drives. For heavy-load conveyor drives above 800 N\u00b7m, see the EP-ZDS High Stiffness series<\/a>.<\/p>\n<\/div>\n

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Servo Press & Forming Machines<\/h3>\n

Korean servo press OEMs use EP-ZDF-120 and EP-ZDF-160 for the main drive reduction stage in servo-controlled stamping and forming presses. The square flange’s 4-bolt pattern locks the gearbox rigidly to the press frame plate under the cyclic impact loads of press operation \u2014 where a bore-fit gearbox risks micro-rotation and fit fretting under the high-frequency torque reversals at the press cycle rate. The 2\u00d7 instant stop torque (1,600 N\u00b7m for ZDF-160 at 800 N\u00b7m rated) absorbs stamping impact loads without gearbox damage.<\/p>\n<\/div>\n

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Automated Panel & Glass Handling<\/h3>\n

Korean flat-panel display and glass substrate handling gantry systems use EP-ZDF-80 for the horizontal axis linear drive and EP-ZDF-60 for the vertical axis. The square flange allows direct attachment to the gantry beam web plate without boring \u2014 critical for Korean OEM panel handling machine builders who use laser-cut structural steel plates as the primary machine structure. IP54 sealing and lifetime lubrication are particularly valued in Korean display panel cleanroom-adjacent environments where maintenance access is restricted.<\/p>\n<\/div>\n

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Packaging Machinery \u2014 Bracket-Mounted Actuators<\/h3>\n

Korean food and beverage packaging OEMs use EP-ZDF-60 and EP-ZDF-80 for servo-driven filling, sealing, and labelling station axes \u2014 as a \u30b5\u30fc\u30dc\u30e2\u30fc\u30bf\u30fc\u7528\u904a\u661f\u30ae\u30a2\u30dc\u30c3\u30af\u30b9<\/strong> drives where the gearbox is mounted on a removable bracket assembly. The square flange enables the entire motor-gearbox-bracket assembly to be unbolted from the machine frame in one motion and replaced as a module \u2014 reducing production line downtime during scheduled maintenance compared to bore-mount designs where the motor must be uncoupled before the gearbox can be extracted from the bore. For right-angle motor configurations saving axial space, see the EP-ZDWF right-angle square-flange series planetary gearbox<\/a>.<\/p>\n<\/div>\n

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Welded-Frame Machine Tools \u2014 No Post-Weld Boring<\/h3>\n

Korean non-mainstream machine tool builders using heavy welded steel frames for special-purpose CNC machines \u2014 pipe notching machines, tube bending centres, custom fixture mills \u2014 frequently specify EP-ZDF because the square flange eliminates the post-weld precision boring operation that would be required for a round-bore gearbox mount. After welding, the frame needs only a flat-ground mounting surface and 4 drilled holes \u2014 achievable with portable tooling on the shop floor without moving the frame to a machining centre for boring.<\/p>\n<\/div>\n

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AGV & Mobile Robot Drive Modules<\/h3>\n

Korean AGV (Automated Guided Vehicle) and mobile robot manufacturers use EP-ZDF-40 and EP-ZDF-60 for drive wheel servo reduction stages. The square flange bolts directly to the aluminium or carbon-fibre chassis plate \u2014 a standard construction method in Korean AGV design that uses laser-cut flat-plate chassis assemblies. At 0.4\u20130.9 kg (single-stage, 40\u201360 frame), the low-mass EP-ZDF minimises the unsprung weight of the drive module. The <8 arcmin (frame 60) or <12 arcmin (frame 40) backlash provides the positioning accuracy required for Korean warehouse AGV lane-keeping and dock-positioning operations.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\"Planerary<\/p>\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