EP-ADS Series Round Flange Inline Planetary Gearbox — Five Targeted Ratios (EP-ADS047 to EP-ADS255)

The EP-ADS series round flange inline planetary gearbox answers a specific application question: when your machine design requires a circular self-centring flange output, one of the four special gear ratios — 21, 31, 61, or 91 — 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, then EP-ADS is the product engineered specifically for your requirement.

EP-ADS provides exactly five two-stage ratios: 16, 21, 31, 61, and 91. The four non-standard values are not standard planetary combinations — 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, ≥97% single-stage efficiency, −10 °C to +90 °C operating range, and IP65 dust and water jet protection.

i=31 — CNC Turret Drives

CNC lathe turret tool changers require a gear reducer that fits concentrically into the turret cylindrical housing bore — EP-ADS round-flange self-centring geometry provides this directly. The i=31 ratio at 1,450 rpm input gives 46.8 rpm — a common turret indexing speed for Korean CNC turning centre tool changers. The circular pilot diameter eliminates alignment eccentricity that would cause tool tip position error during indexing.

i=16 — High-Cycle Index Heads

High-cycle rotary index heads on Korean PCB drilling machines, automotive component inspection fixtures, and electronic assembly palletising systems typically require ~90 rpm table speed from a standard motor. EP-ADS at i=16 delivers 90.6 rpm from a 1,450 rpm input. The P0 ≤1 arcmin grade is available for index heads where cumulative positional error across many cycles must remain within tight angular bounds.

Agricultural Automation — i=31/61 Seeder Heads

Korean precision agriculture seeder head drives require a specific seed disc rotation rate matched to planting spacing and forward travel speed. EP-ADS at i=31 or i=61, combined with downstream agricultural bevel gearboxes, delivers the precise seeder head rotation rate directly from a servo motor — allowing variable-rate planting through motor speed control while the gearbox provides the required mechanical reduction within the seeder head housing bore.

• ✔Round flange pilot diameter CMM-verified — same tolerance as EP-AD
• ✔Backlash grade (P0/P1/P2) certified on shipping documentation per unit
• ✔Gear ratio accuracy of 16/21/31/61/91 verified — non-standard ratios confirmed by output speed measurement
• ✔IP65 ingress test per IEC 60529 on every unit
• ✔Material certificate and dimensional drawing supplied with every delivery

🎯

⭕

🔌

🎓

🌡️

🇰🇷

EP-ADS090 P1, i=61 for our 500 mm 4th-axis rotary table. We tried using EP-AD at i=50 (29 rpm — too fast for our titanium milling cycle) and i=70 (20.7 rpm — too slow for our surface speed). EP-ADS at i=61 gives 23.8 rpm from our 1,450 rpm motor — exactly the table speed our cutting parameters require. The round flange pilots straight into our 92 mm H7 bore. No dial indicator required, same as with our previous EP-AD units. Korea Ever-Power confirmed the i=61 output speed to three decimal places before we ordered. 18 months, 12 tables, zero issues.

EP-ADS090 P2, i=21 on a synchronised automotive body panel assembly line — 40 index tables, direct-online 1,500 rpm induction motor on each. Target table speed was 71 rpm. With i=20 we were getting 75 rpm (5.6% fast, causing panel misalignment at station transfer). With EP-ADS i=21 we get 71.4 rpm — within 0.6% of target, well within the system's synchronisation tolerance. Removing 40 VFDs from the line saved approximately ₩38 million in equipment cost and eliminated the cross-station speed variation noise that was creating quality alerts on our SPC system. EP-ADS paid for itself in the first line deployment.

EP-ADS064 P0, i=91 for the wrist joint of a 7-kg payload collaborative robot. Required: sub-arcminute backlash, ~16 rpm max joint speed, round-flange bore installation in a 68 mm H6 housing bore. EP-ADS fit all three requirements simultaneously — no other Korea Ever-Power round-flange series offers P0 at i=91 in a 64 mm body. The non-standard ratio 91:1 cannot be approximated by standard combinatorial ratios close enough for our motor selection — it had to be exactly 91. Korea Ever-Power confirmed this was a purpose-engineered ratio. Inertia ratio and output speed calculations were provided in Korean on the same business day we enquired.

CV Joint Drive Shafts

For EP-ADS installations where the output shaft axis must be offset from the load centre — dual-drive rotary table configurations, offset conveyor drive layouts, or flexible linkages between the EP-ADS circular-flange output and the driven machinery. CV drive shafts transmit the output torque through offset and angular misalignment without introducing additional backlash.

Worm Gear Reducers

For vertical EP-ADS output axes where the load must be held in position on servo power-off — vertical tilting fixtures, vertical column positioners, and hoist mechanisms — a downstream self-locking worm gear reducer provides gravity load holding without an electromagnetic brake. Worm stages also extend the EP-ADS speed reduction range below the 91:1 maximum two-stage output for very slow rotation requirements.

Agricultural Gearboxes

Korean precision agriculture automation using EP-ADS servo-driven seeder head and fertiliser spreader drives connects to downstream bevel and spiral-bevel agricultural gearboxes for PTO-driven multi-output configurations. The targeted i=31 and i=61 ratios of EP-ADS are particularly suited to precision seeder drive systems where the seed disc rotation rate must match the planting spacing specification without VFD adjustment.

QWhy does EP-ADS only have five two-stage ratios? Is it a simplified or lower-spec version of EP-AD?

EP-ADS is not a simplified EP-AD. The five two-stage ratios in EP-ADS — 16, 21, 31, 61, and 91 — are independently engineered products. The non-standard values 21, 31, 61, and 91 cannot be produced by combining the 4/5/7/10 single-stage ratios (e.g. 4×5=20, not 21; no standard combination gives 31, 61, or 91). EP-ADS uses its own gear train configuration to achieve these four specific ratios, while EP-AD uses a different configuration to provide its broader twelve-ratio range. All precision grades (P0/P1/P2), efficiency, and temperature specifications are identical between the two series.

QCan I swap EP-ADS for EP-AD at the same frame number? Are the physical dimensions the same?

The frame numbers match (ADS047 and AD047 share the same body diameter and round-flange pilot diameter/bolt-circle). The output shaft configuration, P0/P1/P2 grades, and motor adapter system are also identical. In most cases, EP-ADS and EP-AD are drop-in substitutable at the same frame number and same ratio where the ratio exists in both. However, if the ratio you need is only in EP-AD (20, 25, 35, 40, 50, 70, or 100) then EP-ADS cannot substitute. Confirm dimensional drawings with Korea Ever-Power before substituting in a qualified production installation.

QI need i=20 (or 25, 35, 40, 50, 70, 100) with a round flange. EP-ADS doesn't offer this. What should I specify?

For any two-stage ratio not in the EP-ADS set — specifically 20, 25, 35, 40, 50, 70, or 100 — the correct product is the EP-AD round flange planetary gearbox, which covers all twelve ratios in the same round-flange format with the same P0/P1/P2 grade selection. EP-AD and EP-ADS share the same frame sizes and flange dimensions, so transitioning between them requires no mechanical redesign.

QDoes EP-ADS support servo motor connection, or only induction motors?

EP-ADS supports both servo motor and induction motor connections through the Korea Ever-Power motor adapter plate system, identical to EP-AD. The P0/P1/P2 precision grades are specified for servo motor closed-loop position control applications. The induction motor application (fixed-speed, no VFD) exploits the targeted ratio set to match output speed without variable frequency adjustment. Provide your motor brand, model, and shaft diameter when ordering to confirm the correct input adapter configuration.

QIs the single-stage ratio i=3 available in EP-ADS?

No. EP-ADS single-stage ratios are 4, 5, 7, and 10 only — the same four values as EP-AD. The ratio i=3 (and i=6, i=8, i=9) is not available in either the EP-ADS or EP-AD round-flange series. If your application requires i=3 single-stage with a round-flange circular output, contact Korea Ever-Power for guidance — the round-flange requirement combined with i=3 may be addressed through a different configuration in the product range.