EP-FADR Series Right-Angle High-Speed Planetary Gearbox | Round Flange 90°

EP-FADR Series — Round-Flange Right-Angle Planetary Gearbox

The complete right-angle package: EP-FAD round-flange high-speed platform combined with a 90° bevel gear output stage. Max input 10,000 rpm, 30,000-hour design life — for high-throughput right-angle servo axes.

The EP-FADR is the most fully specified right-angle model in the Korea Ever-Power planetary gearbox range. It takes the EP-FAD's round-flange high-speed platform — 10,000 rpm max input, 30,000-hour design life — and adds a precision bevel gear output stage that redirects the output shaft 90°.

Compared to the EP-FABR (square-flange right-angle), the EP-FADR's circular bolt-circle flange bolts directly to ISO-standard round-flange rotary tables, actuator housings, and robot link arms — eliminating the adapter plate required by square-flange interfaces and removing the concentricity error that the adapter can introduce.

• ◉Round bolt-circle flange — direct ISO round-flange interface, no adapter plate needed
• ◉10,000 rpm max input — supports ultra-high-speed servo and linear motor configurations
• ◉30,000-hour design life — reduces total lifecycle maintenance cost by up to 50%
• ◉Up to 200:1 in two stages — no tandem gearbox arrangement needed
• ◉Output housing rotatable in four 90° positions to suit any machine layout

EP-FADR: 7 frame sizes, 047–255 mm, round-flange right-angle output

Round Output Flange

Bolt-circle round flange integrates directly with ISO-standard round-flange interfaces. Flange diameter from EP-FADR047 (D1=12 mm) to EP-FADR255 (D1=100 mm), covering mainstream rotary table and actuator specs.

90° Precision Bevel Output

Matched and lapped precision spiral bevel pair redirects output torque 90°. Tooth contact pattern is verified on every unit after assembly to ensure backlash and noise are within the rated specification.

10,000 rpm Max Input

EP-FADR047 and EP-FADR064 accept up to 10,000 rpm, supporting ultra-high-speed servo motors and linear motor rotary conversion configurations in semiconductor equipment.

30,000-Hour Design Life

Upgraded bearing selection and lubrication geometry achieve 30,000 hours — roughly 15 years of two-shift production — reducing total lifecycle maintenance cost significantly versus 20,000-hour class gearboxes.

4-Position Output Orientation

The bevel output housing rotates in four 90° increments to point the output shaft in any required direction. Repositioning in the field takes under 10 minutes — no disassembly of the planetary stage or motor required.

High Bending Moment Rating

The round-flange output carries bending moments from 42.5 Nm (EP-FADR047) to 5,900 Nm (EP-FADR255), supporting cantilevered load configurations without external support bearings.

EP-FADR output orientation adjustment and round-flange bolt-circle dimensions

The motor input end uses the same clamp-ring adapter system (C1–C10) as the EP-FAD, and the eight-step assembly process is identical. Three points are specific to the round-flange right-angle configuration:

Every EP-FADR unit passes the standard five-stage quality process plus one bevel-specific check before shipment:

• ◉DIN 5 profile grinding — ring gear and planet gears 5-axis CNC profile-ground to the same accuracy class as European precision gearboxes
• ◉High-speed run-in test — every unit run at rated input speed (up to 10,000 rpm for small frames) to verify bearing pre-load and oil film formation
• ◉Bevel contact pattern check — tooth contact pattern verified with marking compound after assembly; units outside specification are reworked and re-inspected
• ◉Loaded noise test — noise measured at rated speed under load; units exceeding ≤61–74 dB(A) limits are rejected before boxing
• ◉Individual backlash measurement and grade stamping — P0/P1/P2 grade stamped on the nameplate after individual verification
• ◉IP65 pneumatic seal test — planetary housing and bevel output housing seal interfaces pressure-tested separately

Semiconductor Equipment

Wafer transfer robot right-angle wrist joints, where the round flange bolts directly to the aluminium link arm. 10,000 rpm input and 30,000 hr life suit 3-shift continuous IC fab environments.

FPD Manufacturing

Large-format glass panel transfer robot wrist joints. Round flange bolts directly to the cast link structure, saving installation height and reducing arm cross-section moment of inertia.

CNC Right-Angle Tables

B/A-axis drives on trunnion-type 5-axis machining centres. Round flange eliminates the adapter plate height of square-flange gearboxes, reducing table stack height and stiffness loss.

Winding & Unwinding Machines

Film, foil, and battery electrode winders where the servo motor axis is perpendicular to the mandrel. Two-stage EP-FADR at i=140–200 delivers large right-angle reduction in a single unit.

High-Speed Logistics Sorting

E-commerce fulfilment sorting robot right-angle joints. High speed, round flange, and right-angle in a single unit reduce component count and lower robot arm weight.

EV Battery Assembly

Battery module stacking robot wrist joints. Round-flange bolts directly to the link, folding the servo motor inside the battery tray envelope to minimise arm cross-section width.

Round flange + inline output + 30,000 hr, efficiency ≥97% (1-stage). Choose when layout permits inline and maximum drivetrain efficiency is required.

Square flange + 90° right-angle output + 20,000 hr. Lower cost when square-flange interface is standard; same P0 backlash (≤2 arc-min).

Low-cost right-angle reduction with self-locking capability. Suitable for low-speed, low-precision applications requiring vertical-axis load holding without a servo brake.

Constant-velocity couplings for connecting EP-FADR output to articulating or misaligned load shafts in mobile robot joints and AGV drivetrains.

Q: How do I choose between the EP-FADR and the EP-FABR?

The key differences are the output flange form and design life. The EP-FABR has a square four-bolt flange (20,000 hr life) and is the right choice when the machine interface is a standard square-flange fitting and a 20,000 hr service life is sufficient. The EP-FADR has a round bolt-circle flange (30,000 hr life) and is the right choice when direct round-flange integration with an ISO-standard rotary table, actuator, or robot link is required and longer service life is a priority. Both use identical clamp-ring motor adapters at the input end and achieve the same P0 backlash of ≤2 arc-min.

Q: Why is the EP-FADR efficiency lower than the inline EP-FAD?

The bevel gear output stage introduces additional friction losses. The EP-FAD inline efficiency is ≥97% (1-stage); the EP-FADR is ≥95% (1-stage) — the 2% difference represents the bevel pair mesh loss. For a 1 kW servo drive, this is approximately 20 W of additional heat dissipation. In most applications this is insignificant; but for large machines running continuous high-torque duty with limited thermal dissipation, assess the inline EP-FAD layout first before choosing the right-angle variant.

Q: How does the two-stage EP-FADR achieve 200:1 in a single unit?

The two-stage EP-FADR combines a planetary stage (ratio i₁) with a bevel gear stage (ratio i₂) to give a total ratio of i = i₁ × i₂. By selecting the appropriate planet gear tooth count and bevel gear tooth ratio, total ratios from 25 to 200 are achievable in a single gearbox unit: 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 120, 140, 160, 180, and 200. This eliminates the need to tandem a second gearbox, shortening the drive chain and reducing cumulative backlash.

Q: Can the output shaft direction be changed in the field after delivery?

Yes. The bevel output housing can be repositioned in 90° increments (four positions) at any time. Loosen the four housing retention bolts, rotate to the desired orientation, and re-torque in a cross pattern to the specified installation manual value. Install and tighten the stop pin. The full procedure takes under 10 minutes in the field without disassembling the planetary stage or removing the motor. After repositioning, verify that a minimum 2 mm axial clearance exists at the output shaft tip relative to any adjacent machine structure.

Q: How do I verify the bending moment limit for a cantilevered load on the round-flange output?

When the round-flange output carries a cantilevered load, verify: M_actual = load mass × g × distance from flange face to load centre of gravity. M_actual must be ≤ Mₘₐₓ for the selected frame. Example for EP-FADR110 (Mₘₐₓ = 430 Nm): if the load centre of gravity is 200 mm from the flange face, the maximum permissible cantilevered mass is approximately 430 ÷ (9.8 × 0.2) ≈ 219 kg under static conditions. Under dynamic conditions, add the inertia-induced moment from the acceleration profile to the static bending moment before comparing to Mₘₐₓ.

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"Used EP-FADR200 two-stage at i=100 for a large glass panel transfer robot elbow joint. Round flange bolts directly to the cast iron link — assembly accuracy improved by approximately 30 arc-sec compared to the square-flange solution, and the 30,000 hr life meets our 15-year maintenance-free target."

"EP-FADR047 has run at 9,200 rpm input for 16 months without bearing noise or backlash growth. The 30,000 hr design life is approximately 50% longer than the unit we replaced — a meaningful reduction in lifetime spare-parts cost on our wafer metrology platform."

"Specified EP-FADR110-P0 for the B-axis of a 5-axis trunnion machining centre. The round flange centres directly on the table housing — no adapter shimming. P0 (≤2 arc-min) met our B-axis positioning spec and contour error dropped by 6 arc-sec after the thermal correction factor was tuned."