{"id":589,"date":"2026-05-28T03:47:06","date_gmt":"2026-05-28T03:47:06","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=589"},"modified":"2026-05-28T03:47:06","modified_gmt":"2026-05-28T03:47:06","slug":"ep-ads-round-flange-compact-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/th\/product\/ep-ads-round-flange-compact-planetary-gearbox\/","title":{"rendered":"\u0e40\u0e01\u0e35\u0e22\u0e23\u0e4c\u0e17\u0e14\u0e23\u0e2d\u0e1a\u0e41\u0e1a\u0e1a\u0e2d\u0e34\u0e19\u0e44\u0e25\u0e19\u0e4c\u0e0a\u0e19\u0e34\u0e14\u0e2b\u0e19\u0e49\u0e32\u0e41\u0e1b\u0e25\u0e19\u0e01\u0e25\u0e21 \u0e23\u0e38\u0e48\u0e19 EP-ADS \u2014 \u0e2d\u0e31\u0e15\u0e23\u0e32\u0e17\u0e14\u0e40\u0e1b\u0e49\u0e32\u0e2b\u0e21\u0e32\u0e22\u0e2b\u0e49\u0e32\u0e41\u0e1a\u0e1a (EP-ADS047 \u0e16\u0e36\u0e07 EP-ADS255)"},"content":{"rendered":"

<\/main><\/p>\n
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EP-ADS Series \u2014 Round Flange Inline Planetary Gearbox with Five Targeted Two-Stage Ratios<\/h2>\n
\n
\n

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

\n
\n
5 Ratios
\n16\u201391<\/div>\n
Focused two-stage set<\/div>\n<\/div>\n
\n
\u22641′<\/div>\n
Backlash P0 (arcmin)<\/div>\n<\/div>\n
\n
\u226597%<\/div>\n
Single-Stage Efficiency<\/div>\n<\/div>\n
\n
\u2b55 Round
\nFlange<\/div>\n
Self-centring bore<\/div>\n<\/div>\n<\/div>\n

\n\u2190 Browse All Planetary Gearbox Series
\n<\/a><\/div>\n<\/div>\n
\n

\u0e40\u0e14\u0e2d\u0e30 EP-ADS series round flange inline planetary gearbox<\/strong> answers a specific application question: when your machine design requires a circular self-centring flange output, one of the four special gear ratios \u2014 21, 31, 61, or 91 \u2014 and the full P0\/P1\/P2 precision grade selection, but does not need the twelve-ratio breadth of the EP-AD round flange planetary gearbox<\/a>, then EP-ADS is the product engineered specifically for your requirement.<\/p>\n

EP-ADS provides exactly five two-stage ratios: 16, 21, 31, 61, and 91<\/strong>. The four non-standard values are not standard planetary combinations \u2014 they are specific ratios engineered to deliver precise output speeds from standard 4-pole motor inputs (1,450 rpm or 1,500 rpm) without requiring a variable-frequency drive. All the structural and performance characteristics of the EP-AD series are present: the same round circular-flange pilot geometry for self-centring bore installation, identical P0\/P1\/P2 backlash grades, \u226597% single-stage efficiency, \u221210 \u00b0C to +90 \u00b0C operating range, and IP65 dust and water jet protection.<\/p>\n

\n
\n
\ud83c\udfaf 5 Targeted Ratios<\/div>\n
16\/21\/31\/61\/91 \u2014 engineered for specific speed requirements.<\/div>\n<\/div>\n
\n
\u2b55 Round Flange<\/div>\n
Same self-centring circular bore installation as EP-AD.<\/div>\n<\/div>\n
\n
\ud83c\udf93 P0\/P1\/P2 Grades<\/div>\n
Same three precision levels as EP-AD and EP-AB.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

EP-ADS vs EP-AD \u2014 When Five Ratios Are Exactly Right<\/h2>\n

The EP-ADS and EP-AD series share the same round-flange geometry, the same frame sizes, and the same P0\/P1\/P2 backlash grades. The single difference is the two-stage ratio set. Understanding which series fits your application is therefore a single decision: does your required output speed correspond to one of the five EP-ADS ratios, or do you need one of the additional seven ratios available only in EP-AD?<\/p>\n

<\/p>\n

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TWO-STAGE GEAR RATIO COMPARISON<\/p>\n

\n
\n
EP-AD (12 ratios)<\/div>\n
16<\/span>
\n20<\/span>
\n21\u2605<\/span>
\n25<\/span>
\n31\u2605<\/span>
\n35<\/span>
\n40<\/span>
\n50<\/span>
\n61\u2605<\/span>
\n70<\/span>
\n91\u2605<\/span>
\n100<\/span><\/div>\n<\/div>\n<\/div>\n
\n
\n
EP-ADS (5 ratios \u2014 green only)<\/div>\n
16<\/span>
\n21\u2605<\/span>
\n31\u2605<\/span>
\n61\u2605<\/span>
\n91\u2605<\/span><\/div>\n
\u2605 Non-standard ratios not achievable by simple 4\/5\/7\/10 combinations<\/div>\n<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

EP-ADS vs EP-AD \u2014 Selection Decision<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n
Your Requirement<\/th>\n\u2192 Choose EP-ADS \u2605<\/th>\n\u2192 Choose EP-AD<\/th>\n<\/tr>\n<\/thead>\n
Two-stage ratio needed<\/td>\nExactly one of: 16, 21, 31, 61, or 91<\/td>\n20, 25, 35, 40, 50, 70, 100 or any ratio EP-ADS lacks<\/td>\n<\/tr>\n
Output speed target<\/td>\nMatches the five EP-ADS output speed bands<\/td>\nFalls between the five EP-ADS bands<\/td>\n<\/tr>\n
Flange geometry<\/td>\nRound circular self-centring flange \u2014 identical in both EP-ADS and EP-AD<\/td>\n<\/tr>\n
Backlash precision<\/td>\nP0\/P1\/P2 \u2014 identical grades in both series<\/td>\n<\/tr>\n
Single-stage ratio<\/td>\n4, 5, 7, 10 \u2014 identical in both series (no i=3\/6\/8\/9)<\/td>\n<\/tr>\n
Efficiency \/ Temperature \/ IP<\/td>\nIdentical: \u226597% single-stage \u00b7 \u226594% two-stage \u00b7 \u221210 to +90 \u00b0C \u00b7 IP65<\/td>\n<\/tr>\n
Frame sizes available<\/td>\nADS\/AD 047 \/ 064 \/ 090 \/ 110 \/ 140 \/ 200 \/ 255 \u2014 identical<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\u25b8 Critical selection note: <\/span>
\nIf you need a two-stage ratio not in EP-ADS \u2014 specifically 20, 25, 35, 40, 50, 70, or 100 \u2014 the EP-ADS series does not offer those values. You must select the EP-AD round flange planetary gearbox for the full twelve-ratio range. EP-ADS is not a restricted EP-AD \u2014 it is a separately engineered product optimised for the five specific ratios it provides.<\/span><\/div>\n<\/section>\n

<\/p>\n

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The Five Ratios \u2014 Exact Output Speeds from Standard Motor Inputs<\/h2>\n

EP-ADS delivers the following output speeds from the three most common Korean industrial motor speeds. These are the target speeds the EP-ADS ratio set is engineered to reach \u2014 no VFD required for fixed-speed applications.<\/p>\n

\n\n\n\n\n\n\n\n\n\n
\u0e2d\u0e31\u0e15\u0e23\u0e32\u0e2a\u0e48\u0e27\u0e19<\/th>\n\u0e40\u0e2d\u0e32\u0e15\u0e4c\u0e1e\u0e38\u0e15
\n@ 1,450 rpm<\/span><\/th>\n		\u0e40\u0e2d\u0e32\u0e15\u0e4c\u0e1e\u0e38\u0e15
\n@ 1,500 rpm<\/span><\/th>\n		\u0e40\u0e2d\u0e32\u0e15\u0e4c\u0e1e\u0e38\u0e15
\n@ 3,000 rpm servo<\/span><\/th>\n		Typical application speed target<\/th>\n<\/tr>\n<\/thead>\n
16<\/td>\n90.6 rpm<\/td>\n93.8 rpm<\/td>\n187.5 rpm<\/td>\nModerate-speed rotary table, high-cycle indexing head<\/td>\n<\/tr>\n
21 \u2605<\/td>\n69.0 rpm<\/td>\n71.4 rpm<\/td>\n142.9 rpm<\/td>\nSynchronised assembly conveyors at 70 rpm, welding positioners (fills gap between i=20 at 75 rpm and i=25 at 60 rpm)<\/td>\n<\/tr>\n
31 \u2605<\/td>\n46.8 rpm<\/td>\n48.4 rpm<\/td>\n96.8 rpm<\/td>\nCNC turret indexing at ~48 rpm, automotive assembly station drives (fills gap between i=25 at 60 rpm and i=35 at 43 rpm)<\/td>\n<\/tr>\n
61 \u2605<\/td>\n23.8 rpm<\/td>\n24.6 rpm<\/td>\n49.2 rpm<\/td>\nPrecision rotary tables at ~24 rpm, slow-rotation welding turntables (fills gap between i=50 at 30 rpm and i=70 at 21 rpm)<\/td>\n<\/tr>\n
91 \u2605<\/td>\n15.9 rpm<\/td>\n16.5 rpm<\/td>\n33.0 rpm<\/td>\nVery slow precision turntables ~16 rpm, hollow-shaft cobot joints (fills gap between i=70 at 21 rpm and i=100 at 15 rpm)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\u2605 Non-standard ratios \u2014 not achievable by simple product of the 4\/5\/7\/10 single-stage values. These four ratios are the defining characteristic of the EP-ADS series and represent the primary reason to choose EP-ADS over EP-AD when only these output speed bands are required.<\/p>\n<\/section>\n

<\/p>\n

\n

EP-ADS047 to EP-ADS255 \u2014 Complete Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
EP-ADS \u2014 All Frame Specifications<\/th>\n<\/tr>\n<\/thead>\n
Output Torque (T2N)<\/td>\n14 N\u00b7m (ADS047) to 2,000 N\u00b7m (ADS255)<\/td>\n<\/tr>\n
Output Flange<\/td>\nRound circular flange \u2014 precision pilot diameter for self-centring bore installation<\/td>\n<\/tr>\n
Backlash \u2014 P0<\/td>\nSingle-stage \u22641 arcmin \u00b7 Two-stage \u22643 arcmin<\/td>\n<\/tr>\n
Backlash \u2014 P1<\/td>\nSingle-stage \u22643 arcmin \u00b7 Two-stage \u22645 arcmin<\/td>\n<\/tr>\n
Backlash \u2014 P2<\/td>\nSingle-stage \u22645 arcmin \u00b7 Two-stage \u22647 arcmin<\/td>\n<\/tr>\n
Single-Stage Ratios<\/td>\n4, 5, 7, 10 (ratios 3, 6, 8, 9 not available)<\/span><\/td>\n<\/tr>\n
Two-Stage Ratios<\/td>\n16, 21, 31, 61, 91 only \u2014 five targeted values<\/td>\n<\/tr>\n
Single-Stage Efficiency<\/td>\n\u226597%<\/td>\n<\/tr>\n
Two-Stage Efficiency<\/td>\n\u226594%<\/td>\n<\/tr>\n
\u0e2d\u0e38\u0e13\u0e2b\u0e20\u0e39\u0e21\u0e34\u0e43\u0e19\u0e01\u0e32\u0e23\u0e17\u0e33\u0e07\u0e32\u0e19<\/td>\n\u221210 \u00b0C to +90 \u00b0C (with series grease)<\/td>\n<\/tr>\n
Protection Rating<\/td>\nIP65 standard<\/td>\n<\/tr>\n
\u0e01\u0e32\u0e23\u0e2b\u0e25\u0e48\u0e2d\u0e25\u0e37\u0e48\u0e19<\/td>\nSealed grease \u2014 maintenance-free<\/td>\n<\/tr>\n
\u0e15\u0e31\u0e27\u0e40\u0e25\u0e37\u0e2d\u0e01\u0e40\u0e1e\u0e25\u0e32\u0e2a\u0e48\u0e07\u0e01\u0e33\u0e25\u0e31\u0e07<\/td>\nS1: smooth cylindrical \u00b7 S2: with keyway<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Frame Sizes \u2014 EP-ADS047 Through EP-ADS255<\/h3>\n
\n\n\n\n\n\n\n
\u0e40\u0e1f\u0e23\u0e21<\/th>\nADS047<\/th>\nADS064<\/th>\nADS090<\/th>\nADS110<\/th>\nADS140<\/th>\nADS200<\/th>\nADS255<\/th>\n<\/tr>\n<\/thead>\n
Body \u00d8 (mm)<\/td>\n47<\/td>\n64<\/td>\n90 \u2605<\/td>\n110<\/td>\n140<\/td>\n200<\/td>\n255<\/td>\n<\/tr>\n
Torque class<\/td>\nMin 14 N\u00b7m<\/td>\nLight<\/td>\nMost specified<\/td>\nMedium<\/td>\nMed-heavy<\/td>\nHeavy<\/td>\nMax 2,000 N\u00b7m<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Frame numbers ADS047, ADS064, ADS110, ADS140, ADS200, ADS255 match the EP-AD series exactly. The round-flange pilot diameter and bolt-circle are identical between ADS and AD at each frame \u2014 the only difference is the available gear ratio set. Confirm with Korea Ever-Power if substituting ADS for AD or vice versa at the same frame number.<\/p>\n<\/section>\n

<\/p>\n

\n

Model Designation Guide \u2014 EP-ADS Part Number<\/h2>\n
\n
EP-ADS 090 \/ 61 \/ S2 \/ P1<\/div>\n
\n
\n
EP-ADS<\/div>\n
\u0e40\u0e01\u0e32\u0e2b\u0e25\u0e35 \u0e40\u0e2d\u0e40\u0e27\u0e2d\u0e23\u0e4c\u0e1e\u0e32\u0e27\u0e40\u0e27\u0e2d\u0e23\u0e4c
\nRound Flange Inline
\n5-Ratio Focused Series<\/div>\n<\/div>\n
\n
090<\/div>\n
Body diameter
\n90 mm
\nSame scale as EP-AD<\/div>\n<\/div>\n
\n
61<\/div>\n
Gear ratio i=61:1
\n(two-stage)
\n~24 rpm @ 1,450 rpm<\/div>\n<\/div>\n
\n
S2<\/div>\n
Output shaft
\nS1: smooth
\nS2: with keyway<\/div>\n<\/div>\n
\n
\u0e1e\u0e351<\/div>\n
Backlash grade
\nP0 \u22641′ \/ P1 \u22643′
\nP2 \u22645′ (single-stage)<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Applications \u2014 Where the Five Targeted Ratios Solve the Speed Specification<\/h2>\n
\n
\n
\n

i=61 \u2014 Precision Rotary Tables at ~24 rpm<\/h3>\n

Korean rotary table OEMs building 4th-axis units for heavy titanium and steel machining centres require a drive output of 23\u201324 rpm from a standard 1,450 rpm motor \u2014 a speed that falls between the i=50 (29.0 rpm) and i=70 (20.7 rpm) values available in standard gearbox families. EP-ADS at i=61 delivers 23.8 rpm from 1,450 rpm input. The round-flange output pilots directly into the table housing bore for zero-measurement installation. EP-ADS090 and EP-ADS110 at i=61, P1 grade cover the most common 4th-axis torque requirements in Korean CNC machining centres with precision CV drive shafts for dual-motor table configurations.<\/p>\n<\/div>\n

\n

i=21 \u2014 Synchronised Assembly Line Drives at ~70 rpm<\/h3>\n

Korean automotive and electronics assembly lines running synchronised index tables at 70\u201372 rpm from direct-online induction motors cannot match this speed with i=20 (72.5 rpm, 4% fast) or i=25 (58 rpm, too slow). EP-ADS at i=21 from a 1,500 rpm motor gives 71.4 rpm \u2014 the target speed with a single fixed-ratio gearbox and no VFD. For assembly line OEMs deploying 20\u201350 index tables per line, eliminating VFDs at each station reduces installation cost, electrical noise, and speed synchronisation variance between stations.<\/p>\n<\/div>\n

\n

i=91 \u2014 Hollow-Shaft Actuators and Very Low Output Speed<\/h3>\n

EP-ADS047 and EP-ADS064 at i=91 P0 serve hollow-shaft collaborative robot joints, optical positioning actuators, and semiconductor handling theta axes requiring sub-arcminute precision at very low output speeds (15\u201317 rpm from standard motor inputs). The round-flange pilot geometry self-centres the gearbox in the actuator bore \u2014 eliminating the shaft alignment variance that accumulates over repeated maintenance and motor replacement cycles. For vertical robot axis configurations, pairing with a self-locking worm reducer stage provides gravity load holding at any position.<\/p>\n<\/div>\n<\/div>\n

\n
\n

Application Reference by Ratio<\/h3>\n