EP-FALR Series Right-Angle Planetary Gearbox with Integrated Timing Belt Pulley

EP-FALR Series — Right-Angle Planetary Gearbox with Integrated Timing Belt Pulley

The EP-FAL's integrated pulley design in a 90° right-angle configuration. Motor and belt axes perpendicular — zero external support bearing, zero separate hub, ratios to 180:1 in a single unit.

EP-FAL — Inline + Integrated Pulley

Motor axis and belt pulley axis are parallel (coaxial). The servo motor sits behind the gearbox along the same centreline as the belt. Ratios i=2–90. Efficiency ≥97% (1-stage).

EP-FALR — 90° Right-Angle + Integrated Pulley

Motor axis is perpendicular to the belt pulley axis. The servo motor folds 90° away from the belt direction. Ratios i=2–180 (extends to 180 via 2-stage bevel). Efficiency ≥95% (1-stage).

The EP-FALR uses the same integrated timing belt pulley output housing as the EP-FAL — the pulley groove is machined directly into the output housing to the same tight TIR tolerances. A precision bevel gear stage is added between the planetary stage and the pulley output, redirecting the drive 90°.

The two-stage EP-FALR extends the maximum available ratio to 180:1 — significantly beyond what the EP-FAL reaches in a single unit. This is particularly useful in applications where the belt provides no additional reduction and the full servo-to-load reduction must come from the gearbox.

• ▸Motor perpendicular to belt — frees axial space along the belt direction
• ▸Ratios up to 180:1 in a single unit — no tandem gearbox required
• ▸Same belt-tension-rated radial force as EP-FAL — up to 34,200 N
• ▸4-position output housing orientation — belt axis in any of four 90° directions
• ▸Same C1–C10 motor adapter as EP-FALR — any servo motor compatible with EP-FAL fits

EP-FALR: 7 frame sizes, 070–280 mm, 90° right-angle integrated pulley output

90° Bevel Output to Pulley

Precision spiral bevel pair redirects drive 90° before the integrated pulley stage. The belt axis is perpendicular to the motor — enabling motor-behind-the-gantry and corner-drive belt layouts not possible with the inline EP-FAL.

Integral Pulley — Same TIR Standard

The belt groove is machined into the bevel output housing in the same setup as the output bearing race. Pulley TIR meets the same standard as the EP-FAL — zero additional runout from a separate hub-to-shaft interface.

180:1 Maximum Ratio

Two-stage EP-FALR reaches i=180 — the highest single-unit ratio with a belt-pulley output in the Korea Ever-Power range. Covers ratios 15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 120, 140, 160, 180.

34,200 N Radial Force Rating

Identical to the EP-FAL — the enlarged output bearing absorbs high belt tension in wide AT10 drive systems. No external support bearing required regardless of belt width or pre-tension level within the rating.

4-Position Output Orientation

The bevel-pulley output housing rotates in four 90° increments to direct the belt axis in any required direction relative to the motor. Repositionable in the field without disassembly.

IP65 + NYOGEL 792D

Full IP65 across both the planetary stage and bevel-pulley housing. NYOGEL 792D lifetime grease — suited to dusty, wet, and washdown environments in wood routing, stone cutting, and food processing belt drives.

EP-FALR output orientation and belt-tension radial force diagram

The motor input end assembles identically to the EP-FAL (clamp-ring C1–C10). Three points are specific to the right-angle pulley output:

Corner-Drive Gantries

CNC gantry axes where the servo motor must be positioned at the end of the beam, perpendicular to the belt travel direction. The EP-FALR folds the motor behind the gantry end plate — freeing the full beam length for workpiece clearance.

Right-Angle Belt Conveyors

Servo-driven belt conveyors in food processing and packaging lines where the drive motor must be mounted on the side frame rather than in-line with the belt. Large F_rad handles wide flat-belt tension loads.

Right-Angle Winders

Film and foil winding machines where the servo drives a belt-driven mandrel at 90° to the motor shaft. Two-stage i=80–180 covers high-reduction winding axes in a single unit.

Stone & Wood CNC — Side Drives

Stone cutting and wood routing gantries where the servo motor is mounted on the side frame, perpendicular to gantry travel. IP65 protects against stone slurry and wood chip ingress.

Cartesian Robot Corner Joints

Cartesian robot modules where the motor on one axis drives a belt perpendicular to its own shaft — a common configuration in gantry-type Cartesian robots where X and Y motor axes are perpendicular to the travel directions.

High-Ratio Direct Belt Drives

Applications where the belt runs at a 1:1 ratio (no further belt reduction) and the full servo-to-load reduction comes from the EP-FALR. i=180 provides a large single-unit reduction in these belt-as-coupling configurations.

Inline (coaxial) belt pulley gearbox. Higher efficiency (≥97% vs ≥95%), ratios to 90:1. Choose when motor and belt axes can be parallel and maximum efficiency is required.

Right-angle gearbox with shaft output. Choose when the output connects via coupling to a separately-mounted pulley, or when the load is a rack-and-pinion or direct coupling rather than a belt.

Low-cost right-angle speed reducer. No integrated pulley — a separate belt hub must be added. Suitable for low-speed, low-precision belt drives where planetary accuracy is not needed.

Heavy-duty right-angle drives for belt-driven agricultural machinery where high torque, shock loading, and outdoor exposure are primary requirements rather than servo-grade precision.

Q: When should I choose the EP-FALR over the EP-FAL?

Choose the EP-FALR when the servo motor cannot be positioned parallel to (in-line with) the belt travel direction. Common scenarios: motor must be mounted on the gantry end plate pointing inward while the belt runs along the beam; conveyor drive where the motor is on the frame side while the belt runs longitudinally; or winding applications where motor shaft and mandrel are perpendicular. Also choose the EP-FALR when you need i=100–180 with an integrated belt pulley output — the inline EP-FAL only reaches i=90.

Q: Why is the EP-FALR P0 backlash ≤2 arc-min rather than ≤1 arc-min like the EP-FAL?

The bevel gear output stage adds approximately 1 arc-min to the planetary stage backlash. The EP-FAL (inline) P0 is ≤1 arc-min from the planetary stage alone. The EP-FALR P0 of ≤2 arc-min is the combined planetary + bevel backlash. In belt-driven positioning axes, the belt itself typically introduces 0.05–0.2 mm of elastic elongation under load — this is usually the dominant positioning error source, and the 1 arc-min difference between EP-FAL P0 and EP-FALR P0 is smaller than the belt elastic error in most applications. However, if the belt is very short and very stiff (e.g., a short flat belt drive), the gearbox backlash becomes more significant and the EP-FAL P0 inline configuration may be worth re-evaluating.

Q: Can the bevel-pulley housing orientation be changed in the field after delivery?

Yes. The bevel-pulley output housing rotates in 90° increments (four positions). Loosen the four housing retention bolts, rotate to the required position, and re-torque in a cross pattern per the installation manual. Install and tighten the stop pin. The procedure takes approximately 10 minutes and does not require disassembling the planetary stage or removing the motor. After rotation, re-verify belt alignment (parallelism within 0.5 mm per 100 mm centre distance) and re-check belt tension.

Q: How does the 180:1 ratio work in the EP-FALR, and is it available in all frame sizes?

The two-stage EP-FALR combines a planetary reduction stage (i₁) and a bevel gear stage (i₂) before the belt pulley output, giving a total ratio i = i₁ × i₂. The standard two-stage ratios for the EP-FALR are 15, 20, 25, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 120, 140, 160, and 180. Not all ratios are available in all frame sizes — specifically, i=100–180 requires the EP-FALR110 or larger. The EP-FALR070 and EP-FALR095 only support the 1-stage range (i=2–9) and the lower 2-stage ratios (i=10–90). Confirm availability for the specific frame size and ratio when placing your enquiry.

Q: Why is the service life specified as "30,000 hr intermittent / 15,000 hr continuous" — same as the EP-FAL?

The dual-life specification has the same root cause as the EP-FAL: the output bearing carries permanent radial load from belt tension even at rest or at low torque. Under S5 intermittent duty (ED ≤ 60%), the bearing L10 life is ≥30,000 hr. Under continuous S1 duty at rated torque and rated belt tension simultaneously, the bearing L10 life reduces to ≥15,000 hr. In the EP-FALR, the bevel stage also adds a small additional radial load component at the bevel gear mesh — this is already accounted for in the published F_rad rating, so no separate correction is needed for the bevel mesh load. Provide your application duty cycle when requesting life validation from Korea Ever-Power.

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"On our packaging line belt conveyor, the drive motor sits on the side frame perpendicular to belt travel. The EP-FALR150 at i=7 replaced a worm gearbox + separate pulley combination — we gained servo-grade synchronisation accuracy that the worm gearbox could not deliver, and the integrated pulley removed the pulley hub that needed monthly grease reapplication."

"Used EP-FALR230 at i=100 for a film winder where the servo drives a belt-coupled mandrel at 90°. The 100:1 ratio in one unit let us remove a separate inline speed reducer that was in the drive chain before — total drive components went from seven to four. Winding tension control stability improved noticeably."

"EP-FALR110-P1 on a laser cutting gantry Y-axis — motor behind the end plate, belt running along the beam. The 4-position output housing orientation was key: we tested three different motor positions during prototyping by simply rotating the housing, without reordering. Good advice: confirm the required orientation before the machine goes to the customer."