EP-ABR-serie precisie planetaire tandwielkasten met haakse vierkante flens (EP-ABR042 tot EP-ABR220)

The EP-ABR series right-angle square flange planetary gearbox is the direct 90-degree output version of the EP-AB inline series. It delivers the same eleven frame sizes, the same complete single-stage ratio set from i=3 to i=10, the same full two-stage range from i=12 to i=100 across 17 values, and the same three backlash grades — all with the output shaft perpendicular to the motor input axis. The right-angle direction change is built into the single gearbox housing; the machine designer gains a 90-degree output without adding a separate bevel gearbox, without accumulating additional backlash, and without introducing a second sealed-grease lubrication unit into the drive train.

The square output flange matches the bolt-circle and pilot diameter of the EP-AB series at each frame size, retaining the same flat-surface mounting interface for machine beds and gearbox plates. Output torque spans 14 N·m at EP-ABR042 to 2,000 N·m at EP-ABR220, with single-stage efficiency ≥97%, −10 °C to +90 °C operating range, and IP65 dust and water jet protection as standard.

Three Machine Layout Problems EP-ABR Solves

• ✔Square bolt-pattern mounting — same as EP-AB inline
• ✔Flat machine-bed mounting surface
• ✔Standard rectangular bolt pattern — simple fixture design
• ✔Choose when the driven component uses a flat interface plate

• ✔Circular pilot diameter — self-centring into bore
• ✔Rotary table and circular actuator bore installation
• ✔Eliminates alignment eccentricity from bolted flat-plate mounting
• ✔Choose when the driven component has a circular housing bore

CNC Machine Tool B-Axis — Horizontal Motor, Tilting Output

Korean 5-axis machining centres with a B-axis tilting spindle head require a precision drive where the servo motor sits alongside the machine column (horizontal orientation) and the gearbox output drives the tilting axis (perpendicular to the motor). EP-ABR090 or EP-ABR115 at P1 ≤3 arcmin, two-stage i=20–50 directly replaces a motor-plus-inline-gearbox-plus-external-bevel arrangement while delivering the same positioning accuracy and eliminating the external bevel stage's added backlash contribution. The square flange bolts directly to the B-axis housing plate.

Collaborative Robot Base — Compact 90° Waist Joint

Korean cobot OEMs designing compact 6-axis collaborative robots require each joint actuator to fit within the robot link cross-section. The waist (base rotation) joint often requires a 90-degree direction change between the motor axis and the rotation axis when the motor is mounted horizontally within the base. EP-ABR060 P0 at i=50–100 serves this application — the P0 ≤1 arcmin backlash is essential for cobot arm positioning repeatability, and the single-unit right-angle design keeps the base profile compact. Pairs with precision CV drive shafts for multi-axis torque distribution configurations.

Carton Forming Machines — Vertical Fold Axis

Korean corrugated carton forming and erecting machines fold carton blanks on vertical axes driven by horizontal servo motors. The folding arm drive requires a right-angle direction change between the horizontal servo and the vertical fold axis, with P1 ≤3 arcmin precision for carton-edge alignment accuracy. EP-ABR060 or EP-ABR090 at i=10–25 single or two-stage is the single-unit solution — eliminating the external bevel pair that was common on legacy machine designs and reducing the drive sub-assembly from three components to one.

Semiconductor Wafer Handling — Vertical Lift with Compact Footprint

Korean semiconductor equipment — wafer loader Z-axis, cassette elevator, overhead transport modules — must fit within the cleanroom tool footprint specification while still delivering the positioning accuracy required by SEMI standards. EP-ABR042 P0 at i=50–100 places the servo motor in the horizontal plane inside the equipment chassis while driving a vertical lift shaft, reducing the equipment vertical stack height compared to a vertical motor-above-shaft arrangement. The IP65 sealed housing meets cleanroom housekeeping requirements without additional enclosures.

Agricultural Machinery Bevel-Drive Replacement

Korean precision agricultural seeder and fertiliser spreader drives that previously used a motor-plus-inline-planetary plus external agricultural bevel box to achieve a right-angle drive-to-working-head arrangement can replace the motor-plus-planetary-plus-bevel with a single EP-ABR. The integrated right-angle output connects directly to the working head shaft, reducing component count and providing a cleaner sealed drive train compatible with outdoor IP65 operation. Downstream agricultural bevel gearboxes from Korea Ever-Power extend this to multi-output PTO configurations.

Vertical Column Linear Drives — Horizontal Motor, Vertical Lead-Screw

Korean gantry-type automation systems and vertical column drives use a horizontal servo motor with a 90-degree turn to drive a vertical lead screw or rack. EP-ABR delivers the right-angle reduction in one unit — the square flange bolts to the column side plate and the output shaft drives the vertical lead screw directly. Self-locking on power-off is provided by pairing EP-ABR with a downstream self-locking worm reducer on vertical axes where gravity load holding is required.

• ✔Backlash measured at the right-angle output shaft — P0/P1/P2 verified with bevel stage contribution included
• ✔Output shaft concentricity and 90° perpendicularity verified — critical for right-angle precision axes
• ✔IP65 ingress test — single housing covering both planetary and bevel stages, per IEC 60529
• ✔Efficiency test at rated torque — single-stage and two-stage confirmed per batch
• ✔Material certificate and dimensional drawing with every delivery

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EP-ABR090 P1, i=25 for our 5-axis B-axis tilting head. We replaced an EP-AB plus a standalone bevel gearbox — the two-piece arrangement had accumulated backlash of 7 arcmin total despite a P1 planetary. The EP-ABR at P1 gave us ≤3 arcmin at the tilting output, confirmed by our backlash gauge on delivery. The B-axis positioning repeatability improved by a factor of two. We also eliminated a maintenance item — the external bevel oil fill check every 2,000 hours. 20 months, 8 machines, stable backlash.

EP-ABR060 P0, i=80 for the waist joint on our 10 kg payload cobot. Base diameter is 160 mm — every millimetre counts. Moving from a vertical motor-plus-inline-gearbox to a horizontal motor with EP-ABR saved 42 mm from the base height and allowed us to standardise the base plate as a single machined disc. The P0 ≤1 arcmin at the right-angle output is what made this possible; the external bevel route could not achieve sub-2 arcmin total. Korea Ever-Power confirmed the output shaft orientation (downward output from a horizontal motor) was standard-catalogue on the ABR060. 15 months, 60 robot bases delivered, zero joint rework.

EP-ABR060 P1, i=10 for the fold-arm drives on a carton erecting machine — 14 fold axes per machine, horizontal servo motor to vertical fold shaft. The previous design used an inline gearbox and external bevel pair; maintenance was replacing the bevel oil every 6 months across 14 drives per machine. EP-ABR eliminated all 14 bevel oil checks — single sealed unit, no periodic lubrication. P1 ≤3 arcmin is adequate for carton-edge alignment; we have not needed P0. 22 months, 6 machines delivered, zero bevel-related maintenance calls. The simple procurement — one part number for all 14 drives — was a secondary benefit our procurement team appreciated immediately.

CV Joint Drive Shafts

For EP-ABR output configurations where the right-angle output shaft must reach a load point offset from the gearbox body — extended robot arm joints, remote-mount axis drives, and flexible linkages between the EP-ABR output and the driven element — precision CV joint drive shafts transmit torque through the angular offset without backlash beyond the gearbox specification.

Worm Gear Reducers

For vertical EP-ABR output axes where the load must be held in position on servo power-off — vertical column positioners, hoist mechanisms, and Z-axis elevators — a downstream self-locking worm gear reducer provides gravity load holding without an electromagnetic brake. Worm stages also extend the EP-ABR reduction range beyond the i=100 two-stage maximum for ultra-low-speed precision positioning applications.

Agricultural Gearboxes

For Korean precision agriculture applications where EP-ABR provides the servo-driven precision right-angle reduction stage and downstream bevel agricultural gearboxes distribute power to multiple working heads — seeder rows, sprayer nozzle banks, fertiliser spreader discs — Korea Ever-Power's agricultural gearboxes complete the drive train from EP-ABR output to final working element.

QDoes the right-angle bevel stage add backlash on top of the P0/P1/P2 specification?

No. The P0 ≤1 arcmin, P1 ≤3 arcmin, and P2 ≤5 arcmin backlash specifications for EP-ABR are the total measured backlash at the right-angle output shaft, including the contribution of the internal bevel direction-change stage. These values are verified on the output shaft itself — not on a hypothetical inline shaft before the bevel stage. When you specify EP-ABR at P1, you get ≤3 arcmin at the machine output regardless of how much of that budget is consumed by the planetary stage and how much by the bevel stage internally.

QCan the EP-ABR output shaft orientation be rotated? What positions are available?

The right-angle output shaft can typically be oriented in multiple fixed positions relative to the motor input axis — for example, output pointing left, right, up, or down relative to the motor mounting plane, with available positions depending on the specific frame and ratio. This orientation is specified at order time and is not field-adjustable. Contact Korea Ever-Power with your required motor mounting orientation and the desired output shaft direction; the engineering team will confirm which orientations are available for your selected EP-ABR frame and provide the dimensional drawing for your chosen configuration.

QAre EP-ABR and EP-AB dimensionally interchangeable at the same frame number?

The output flange bolt-circle and pilot diameter of EP-ABR match EP-AB at the same frame number — an EP-ABR090 has the same output flange dimensions as an EP-AB090. However, the overall gearbox envelope dimensions are different because EP-ABR requires additional housing volume for the bevel stage, and the motor input axis is perpendicular rather than coaxial with the output. You cannot substitute EP-ABR for EP-AB in the same machine cavity without modifying the motor mounting and gearbox housing pocket — but the output flange interface on the driven-side remains compatible.

QWhen should I specify EP-ABR instead of EP-ADR?

The difference is the output flange geometry. EP-ABR has a square bolt-pattern flange for flat-plate mounting to machine beds, column side plates, and rectangular fixture interfaces. EP-ADR has a round circular flange that self-centres into a bore — used when the driven component (rotary table, circular actuator, bore-mount mechanism) has a circular housing that the gearbox pilots into. If your machine interface is a flat plate with four bolt holes, specify EP-ABR. If the interface is a machined circular bore in a housing, specify EP-ADR. Both deliver identical backlash grades, ratios, efficiency, and temperature range.

QIs there a BMEMB-series equivalent to EP-ABR if I need a cost-alternative for non-precision applications?

Yes. The EP-BAD right-angle planetary gearbox is the BMEMB-series square-flange right-angle product — a cost-positioned alternative for applications where P1 ≤3 arcmin is sufficient and the Apex Dynamics precision grade of EP-ABR is not required. For the round-flange right-angle equivalent in BMEMB series, see the EP-BADR round flange right-angle planetary gearbox. Both EP-BAD and EP-BADR share the same output flange dimensions as their EP-ABR and EP-ADR Apex equivalents at each frame size, enabling product family substitution without mechanical redesign.