{"id":583,"date":"2026-05-28T03:19:02","date_gmt":"2026-05-28T03:19:02","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=583"},"modified":"2026-05-28T03:40:55","modified_gmt":"2026-05-28T03:40:55","slug":"ep-ab-precision-inline-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/zh\/product\/ep-ab-precision-inline-planetary-gearbox\/","title":{"rendered":"EP-AB\u7cfb\u5217\u6807\u51c6\u65b9\u5f62\u6cd5\u5170\u9ad8\u7cbe\u5ea6\u76f4\u5217\u884c\u661f\u9f7f\u8f6e\u7bb1\uff08EP-AB042\u81f3EP-AB220\uff09"},"content":{"rendered":"

<\/main><\/p>\n
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EP-AB Series \u2014 Standard Square Flange High-Precision Inline Planetary Gearbox<\/h2>\n
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\"EP-AB<\/p>\n

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\u22641′<\/div>\n
\u53cd\u51b2 P0\uff08\u5f27\u5206\uff09<\/div>\n<\/div>\n
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\u226597%<\/div>\n
\u5355\u7ea7\u6548\u7387<\/div>\n<\/div>\n
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\u221210~+90\u00b0C<\/div>\n
\u5de5\u4f5c\u6e29\u5ea6<\/div>\n<\/div>\n
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IP65<\/div>\n
Standard Protection<\/div>\n<\/div>\n<\/div>\n

\n\u2190 \u67e5\u770b\u6240\u6709\u884c\u661f\u9f7f\u8f6e\u7bb1\u7cfb\u5217
\n<\/a><\/div>\n<\/div>\n
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\u8fd9 EP-AB series high-precision inline planetary gearbox<\/strong> is Korea Ever-Power’s broadest high-precision planetary gearbox general-purpose precision product \u2014 an inline unit with a standard square output flange that addresses eleven frame sizes from EP-AB042 to EP-AB220 and covers three distinct backlash grades in a single product family. The P0 grade (\u22641 arcmin single-stage)<\/strong> brings sub-arcminute positioning to semiconductor handling, optical positioning, and precision measurement applications. The P1 grade (\u22643 arcmin) serves the mainstream servo automation and CNC market. The P2 grade (\u22645 arcmin) covers standard automation with broader cost-performance requirements \u2014 all from the same family, same installation dimensions, same motor adapter plates.<\/p>\n

Single-stage efficiency of \u226597%<\/strong> and an operating temperature range of \u221210 \u00b0C \u81f3 +90 \u00b0C<\/strong> extend the EP-AB’s reach into environments beyond the standard precision planetary range \u2014 cold-room logistics, outdoor machinery, and high-ambient-temperature industrial cells. Standard IP65 dust and water protection<\/strong>, with IP67 as an option, means the EP-AB can be specified in washdown food processing lines, outdoor solar tracker drives, and humid semiconductor fab environments without waterproofing adapters or secondary enclosures.<\/p>\n

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\ud83c\udfaf 3-Grade Backlash<\/div>\n
P0 \/ P1 \/ P2 \u2014 one family, three precision levels.<\/div>\n<\/div>\n
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\ud83c\udf21\ufe0f \u221210 to +90 \u00b0C<\/div>\n
Cold room to high-ambient industrial \u2014 one sealed unit.<\/div>\n<\/div>\n
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\ud83d\udd12 IP65 Standard<\/div>\n
Dust-tight + water jet \u2014 no secondary enclosure needed.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Three Low Backlash Grades \u2014 Selecting the Right Precision Level for Your Application<\/h2>\n

The EP-AB series is unique in the Korea Ever-Power lineup for its three-grade low backlash precision planetary gearbox specification \u2014 P0, P1, and P2 \u2014 within the same physical product family. All three grades share identical installation dimensions, motor adapter plates, and frame sizes. This allows engineers to design a machine architecture once and adjust the precision specification per axis without changing the mechanical design.<\/p>\n

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P0<\/div>\n
Micro Backlash<\/div>\n
Single: \u22641 arcmin
\nTwo-stage: \u22643 arcmin<\/div>\n

The tightest backlash available in the EP-AB family. At \u22641 arcmin single-stage, P0 delivers positioning repeatability at the sub-arcminute level \u2014 the threshold required by semiconductor wafer handlers, precision optical positioning stages, high-resolution encoder alignment fixtures, and laser beam steering systems.<\/p>\n

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Typical Applications:<\/div>\n
Semiconductor handling \u00b7 Optical positioning \u00b7 CMM rotary axes \u00b7 Laser beam steering \u00b7 High-resolution encoders<\/div>\n<\/div>\n<\/div>\n

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P1<\/div>\n
Reduced Backlash<\/div>\n
Single: \u22643 arcmin
\nTwo-stage: \u22645 arcmin<\/div>\n

The industry-standard precision grade for servo automation. P1 at \u22643 arcmin covers CNC machine tool rotary axes, robot joints, and packaging machine servo axes \u2014 all applications where a high-precision planetary gearbox, and precision indexing tables \u2014 the largest segment of Korean automation and machine tool production. The majority of EP-AB orders are specified at P1.<\/p>\n

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Typical Applications:<\/div>\n
CNC rotary tables \u00b7 Robot joints \u00b7 Packaging servo axes \u00b7 Indexing tables \u00b7 Machine tool spindles<\/div>\n<\/div>\n<\/div>\n

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P2<\/div>\n
Standard Backlash<\/div>\n
Single: \u22645 arcmin
\nTwo-stage: \u22647 arcmin<\/div>\n

The cost-optimised grade within the EP-AB precision family. P2 at \u22645 arcmin provides tighter positioning than general industrial gear reducers while maintaining the \u226597% efficiency and \u221210 to +90 \u00b0C operating range. Suited for positioning axes where \u00b15 arcmin is the accuracy specification, or where cost discipline requires the lowest-price entry point in the EP-AB family.<\/p>\n

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Typical Applications:<\/div>\n
General servo positioning \u00b7 Material handling \u00b7 Textile machinery \u00b7 Printing press axes<\/div>\n<\/div>\n<\/div>\n

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EP-AB Backlash Grade Comparison \u2014 Single-Stage and Two-Stage<\/h3>\n
\n\n\n\n\n\n\n\n\n\n
Grade<\/th>\nP0 \u2014 Micro<\/th>\nP1 \u2014 Reduced<\/th>\nP2 \u2014 Standard<\/th>\n<\/tr>\n<\/thead>\n
Single-stage backlash<\/td>\n\u22641 arcmin<\/td>\n\u22643 arcmin<\/td>\n\u22645 arcmin<\/td>\n<\/tr>\n
Two-stage backlash<\/td>\n\u22643 arcmin<\/td>\n\u22645 arcmin<\/td>\n\u22647 arcmin<\/td>\n<\/tr>\n
Positioning repeatability<\/td>\nSub-arcminute<\/td>\n\u00b10.05 mm at R=1 m<\/td>\nStandard precision<\/td>\n<\/tr>\n
Best use case<\/td>\nSemiconductor, optical, metrology<\/td>\nCNC, robot, packaging servo<\/td>\nGeneral automation<\/td>\n<\/tr>\n
Efficiency \/ Temperature<\/td>\n\u226597% single-stage \u00b7 \u226594% two-stage \u00b7 \u221210 \u00b0C to +90 \u00b0C \u2014 identical across all three grades<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\u25b8 Design freedom: <\/span>
\nBecause P0, P1, and P2 share the same installation footprint, a machine designed around EP-AB can assign P0 to the critical positioning axes and P2 to the secondary axes \u2014 without any mechanical redesign between axes. This is a significant engineering advantage over sourcing different product families for different precision requirements. For applications requiring a circular self-centring bore interface instead of the standard square flange, the EP-AD \u5706\u6cd5\u5170\u76f4\u5217\u5f0f\u884c\u661f\u9f7f\u8f6e\u7bb1<\/a> carries the same P0\/P1\/P2 grade system with identical installation dimensions at the motor connection.<\/span><\/div>\n<\/section>\n

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EP-AB042 to EP-AB220 \u2014 Complete Precision Planetary Gearbox Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Common Specifications \u2014 All EP-AB Frames<\/th>\n<\/tr>\n<\/thead>\n
Output Torque Range (T2N)<\/td>\n14 N\u00b7m (EP-AB042) to 2,000 N\u00b7m (EP-AB220)<\/td>\n<\/tr>\n
Backlash \u2014 P0 (Micro)<\/td>\nSingle-stage \u22641 arcmin \u00b7 Two-stage \u22643 arcmin<\/td>\n<\/tr>\n
Backlash \u2014 P1 (Reduced)<\/td>\n\u5355\u7ea7\u22643\u5f27\u5206\uff1b\u4e24\u7ea7\u22645\u5f27\u5206<\/td>\n<\/tr>\n
Backlash \u2014 P2 (Standard)<\/td>\n\u5355\u7ea7\u22645\u5f27\u5206\uff1b\u4e24\u7ea7\u22647\u5f27\u5206<\/td>\n<\/tr>\n
\u5355\u7ea7\u6bd4\u7387<\/td>\n3, 4, 5, 6, 7, 8, 9, 10<\/td>\n<\/tr>\n
\u4e24\u9636\u6bb5\u6bd4\u7387<\/td>\n12, 15, 16, 20, 25, 28, 30, 32, 35, 40, 45, 50, 60, 70, 80, 90, 100<\/td>\n<\/tr>\n
\u5355\u7ea7\u6548\u7387<\/td>\n\u226597%<\/td>\n<\/tr>\n
\u4e24\u9636\u6bb5\u6548\u7387<\/td>\n\u226594%<\/td>\n<\/tr>\n
\u5de5\u4f5c\u6e29\u5ea6<\/td>\n\u221210 \u00b0C to +90 \u00b0C (with series grease)<\/td>\n<\/tr>\n
Protection Rating<\/td>\nIP65 standard \u00b7 IP67 optional<\/td>\n<\/tr>\n
\u8f93\u51fa\u6cd5\u5170<\/td>\nStandard square flange (S1: smooth shaft \u00b7 S2: with keyway)<\/td>\n<\/tr>\n
\u6da6\u6ed1<\/td>\nSealed grease \u2014 maintenance-free under normal operating conditions<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Available Frame Sizes \u2014 EP-AB042 Through EP-AB220<\/h3>\n
\n\n\n\n\n\n\n\n
\u6846\u67b6<\/th>\nAB042<\/th>\nAB060
\n\/ AB060A<\/span><\/th>\n		AB090
\n\/ AB090A<\/span><\/th>\n		AB115
\n\/ AB115A<\/span><\/th>\n		AB142
\n\/ AB142A<\/span><\/th>\n		AB180<\/th>\nAB220<\/th>\n<\/tr>\n<\/thead>\n
Body \u00d8 (mm)<\/td>\n42<\/td>\n60<\/td>\n90<\/td>\n115<\/td>\n142<\/td>\n180<\/td>\n220<\/td>\n<\/tr>\n
\u626d\u77e9\uff08T2N\uff09<\/td>\nFrom 14 N\u00b7m<\/td>\nLight<\/td>\n\u2605 Most specified<\/td>\nMedium<\/td>\nMedium-heavy<\/td>\nHeavy<\/td>\nUp to 2,000 N\u00b7m<\/td>\n<\/tr>\n
Note<\/td>\n\u2014<\/td>\nA = alt. input<\/td>\nA = alt. input<\/td>\nA = alt. input<\/td>\nA = alt. input<\/td>\n\u2014<\/td>\n\u6700\u5927\u5e27<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Frames with suffix “A” (e.g. AB060A) provide an alternative input flange geometry for specific motor coupling configurations. Gear train, backlash specification, and output dimensions are identical to the non-A frame. Contact Korea Ever-Power with your motor model to confirm the correct input adapter.<\/p>\n

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\u25b8 Two-stage ratio note: <\/span>
\nTwo-stage ratios include 12, 16, 28, 32, and 45 \u2014 intermediate ratios not available in many competing inline high-precision planetary gearbox families. These allow precise output speed matching to application requirements without resorting to non-standard single-stage configurations. If your required output speed falls between two standard single-stage ratios, the EP-AB two-stage range almost certainly covers it.<\/span><\/div>\n<\/section>\n

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Model Designation Guide \u2014 EP-AB Part Number<\/h2>\n
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EP-AB 090 \/ 10 \/ S2 \/ P1<\/div>\n
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EP-AB<\/div>\n
\u97e9\u56fd\u6c38\u529b
\nInline, Square Flange
\nPrecision Series<\/div>\n<\/div>\n
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090<\/div>\n
Housing body
\ndiameter: 90 mm<\/div>\n<\/div>\n
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10<\/div>\n
Gear ratio
\ni = 10:1
\n(single-stage)<\/div>\n<\/div>\n
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S2<\/div>\n
\u8f93\u51fa\u8f74
\nS1\uff1a\u5e73\u6ed1
\nS2\uff1a\u5e26\u952e\u69fd<\/div>\n<\/div>\n
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P1<\/div>\n
\u53cd\u51b2\u7b49\u7ea7
\nP0 \/ P1 \/ P2
\n(\u22641 \/ \u22643 \/ \u22645′)<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n\n\n\n\n\n\n\n\n\n
Position<\/th>\nCode<\/th>\nOptions \/ Meaning<\/th>\n<\/tr>\n<\/thead>\n
\u7cfb\u5217<\/td>\nEP-AB \/ EP-AB_A<\/td>\nKorea Ever-Power inline square-flange precision gearbox. Suffix A = alternative input flange geometry<\/td>\n<\/tr>\n
Frame Size<\/td>\n042 \/ 060 \/ 090 \/ 115 \/ 142 \/ 180 \/ 220<\/td>\nHousing body diameter in mm. Determines torque capacity and motor shaft bore range.<\/td>\n<\/tr>\n
Gear Ratio<\/td>\n3\u201310 (1-stage) \/ 12\u2013100 (2-stage)<\/td>\nSingle-stage: 3,4,5,6,7,8,9,10 \u00b7 Two-stage: 12,15,16,20,25,28,30,32,35,40,45,50,60,70,80,90,100<\/td>\n<\/tr>\n
Output Shaft<\/td>\nS1 \/ S2<\/td>\nS1: smooth cylindrical shaft \u00b7 S2: shaft with keyway (standard for gear and pulley mounting)<\/td>\n<\/tr>\n
Backlash Grade<\/td>\nP0 \/ P1 \/ P2<\/td>\nP0: \u22641’\/\u22643′ (1\/2-stage) \u00b7 P1: \u22643’\/\u22645′ \u00b7 P2: \u22645’\/\u22647′ \u2014 same installation dimensions across all grades<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

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Applications \u2014 Where EP-AB Precision and IP65 Protection Combine<\/h2>\n
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CNC Machine Tool Axes \u2014 P1 Grade<\/h3>\n

Korea’s precision machine tool industry \u2014 serving automotive, aerospace, and mould and die sectors \u2014 specifies P1 (\u22643 arcmin) precision inline planetary gearboxes<\/a> for rotary table A-axes, spindle tilting B-axes, and indexing drives. Frames 090 and 115 at ratios 10:1 to 50:1 cover the majority of Korean CNC 4th and 5th axis drive requirements. The \u226597% single-stage efficiency reduces motor thermal load in spindle area enclosures where cooling airflow is limited by the machine structure. Pairs with precision CV drive shafts for dual-drive rotary table configurations.<\/p>\n<\/div>\n

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Semiconductor Equipment \u2014 P0 Grade, IP65 in Cleanroom<\/h3>\n

300 mm wafer handler theta axes, stage positioning drives, and mask aligner rotation stages demand sub-arcminute backlash \u2014 where a low backlash planetary gearbox for semiconductor equipment<\/strong> is a mandatory specification and resistance to the cleaning agents used in semiconductor fabrication environments. These compact frames at P0 (\u22641 arcmin) provide the required positioning precision, while the IP65 sealed housing resists isopropanol and deionised water cleaning cycles common in Korean memory and logic fab facilities. The \u221210 to +90 \u00b0C operating range covers both the chilled sub-fab environments and the elevated-temperature processing areas of a typical Korean DRAM or NAND facility.<\/p>\n<\/div>\n

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Industrial Robots \u2014 P1 Grade, \u221210 \u00b0C Cold-Room<\/h3>\n

Industrial robot joint drives in Korea’s automotive assembly, electronics production, and food processing sectors require inline planetary gearboxes that maintain precision across the \u221210 \u00b0C to +90 \u00b0C ambient range \u2014 a specification that eliminates units rated only to 0 \u00b0C or +40 \u00b0C. The 090 and 115 frames at P1 serve robot shoulder and elbow joints; the 060 frame covers robot wrist axes, cover the torque range of medium-payload 6-axis arms operating in Korean cold-chain food processing and automotive paint shop environments. The IP65 rating handles the washdown cleaning cycles in food processing robot cells.<\/p>\n<\/div>\n<\/div>\n

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Application Reference<\/h3>\n