ชุดเกียร์ทดรอบแบบเฟืองดาวเคราะห์ความแม่นยำสูง รุ่น BAB — หน้าแปลนมาตรฐาน (EP-BAB042 ถึง EP-BAB220)

The EP-BAB series high-precision planetary gearbox is Korea Ever-Power's most widely specified servo transmission product, combining a standard square-flange output with the precision gear engineering that industrial robots, CNC machining centres, automated assembly, and packaging lines demand. As a เกียร์ทดรอบดาวเคราะห์ความแม่นยำสูง built specifically for servo motor pairing, EP-BAB series delivers backlash of ≤3 arcmin single-stage across all seven frame sizes from EP-BAB042 through EP-BAB220, covering rated output torque from 14 N·m up to 2,000 N·m.

What sets this high-precision planetary gearbox apart from standard industrial gear reducers is the manufacturing foundation: alloy steel gears with full-body hardening throughout — not surface-only case-hardening — maintain tooth geometry stability under cyclic contact stress so backlash does not creep upward over the service life. ANSYS finite element tooth-strength analysis, profile and lead corrections on every gear set, and an integrated one-piece planet carrier and output shaft eliminate tolerance stack-up at every stage of the assembly. The result is a high-precision planetary gearbox that remains within its stated specification across millions of servo reversals without recalibration — directly meeting the demands of Korea's semiconductor, EV battery, and precision automation industries.

EV Battery Cell Assembly

Korea's expanding EV battery sector deploys high-precision planetary gearbox drives throughout cell stacking, tab welding, and module assembly. EP-BAB090 and EP-BAB115 provide the torque-to-footprint ratio that keeps gantries compact while precision eliminates cell misalignment defects directly impacting yield rate.

Precision Packaging Lines

High-speed form-fill-seal machinery demands gear reducer reliability across billions of servo cycles without backlash drift. EP-BAB060 and EP-BAB090 at 15:1–25:1 cover packaging servo motor ranges with sealed lubrication eliminating contamination risk in food-contact proximity zones.

Medical Device Manufacturing

Surgical instrument assembly in Korea's medical device sector requires servo actuators maintaining positioning accuracy across sterile cleaning cycles. EP-BAB042–EP-BAB090 cover the motor range with sealing suitable for periodic wash-down environments and material certificates supporting device certification.

Every EP-BAB unit is manufactured under ISO 9001:2015 quality management. Korea Ever-Power maintains Korean-language technical documentation and local certification support, making KS and CE compliance documentation readily available for Korean equipment qualification packages without international coordination overhead.

Factory Acceptance Protocol — Every Unit

• ✔Backlash measurement — P1/P2 grade verified individually per unit on calibrated encoder bench
• ✔Full-load torque test at 110% rated output torque
• ✔Noise check at 3,000 rpm — <65 dB(A) confirmed for every unit
• ✔Output shaft radial and axial runout measurement
• ✔Material certificate and inspection report supplied with each unit

Korea Ever-Power Quality Promise

• ✔Backlash on shipped certificate = measured value for your unit
• ✔2-year warranty — claims handled locally in Korea
• ✔Korean-language engineering support — not translated overseas docs
• ✔RoHS-compliant materials — SVHC-free certificate on request

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→ Precision CV Drive Shafts

For robot arm link extensions and CNC rotary table output connections where the gearbox output flange cannot be directly adjacent to the load. CV shafts absorb misalignment without transmitting bending forces into the EP-BAB output bearing — preserving the P1 backlash specification under load.

• ▸Runout ≤0.005 mm — P1 gear reducer compatible
• ▸Torque capacity to 2,500 N·m

→ Self-Locking Worm Gearbox

For vertical robot axes where gravity requires fail-safe holding torque on power loss. A worm stage downstream of EP-BAB provides precision and worm provides self-locking — EP-BAB handles precision positioning, worm handles gravity safety, no additional brake hardware needed.

• ▸Self-locking at ratios ≥40:1
• ▸Combined ratios to 1,000:1

→ Bevel Stage Power Split

For multi-axis automation where a single EP-BAB220 must power two perpendicular output axes. High-efficiency bevel stages split output at 96–98% per-stage efficiency with minimal additional backlash contribution.

• ▸96–98% bevel efficiency
• ▸Compact for tight multi-axis layouts

EP-BAB090 units on a 6-axis welding robot shoulder and elbow joints — 14 months of two-shift automotive production. Backlash measured at last maintenance check still within P1 spec. The per-unit measurement certificate was essential for our robot acceptance test protocol. Korean-language support was critical during commissioning — fast and technically accurate throughout.

EP-BAB060 on a 300 mm wafer FOUP handler wrist joint. Cleanroom particle protocol passed first submission — sealed housing generated zero contamination incidents over 18 months. Local Korean stock meant delivery within 3 days — critical for our production ramp schedule. LS Electric servo motor adapter fit perfectly with no modification.

EP-BAB115 for the 4th axis on a 5-axis CNC machining titanium aerospace parts. P1 ≤3 arcmin was a hard customer requirement for first-article inspection. 20 months in production, axis positioning accuracy still within ±0.02° — better than our spindle calibration interval requires. Hyundai servo motor adapter was supplied within a week on request.

EP-BAB090 across 16 servo axes on our EV battery cell stacking line. Cell misalignment defect rate dropped from 0.8% to under 0.1% after switching from competitor gear reducer units — directly attributable to tighter, consistent backlash. Korea Ever-Power's engineering team helped confirm the correct gear ratio for our servo drive configuration. 10 months, zero failures.

คิวWhat is the difference between EP-BAB P1 and P2 backlash grades?

P1 (precision grade) delivers ≤3 arcmin single-stage or ≤5 arcmin two-stage — specify for closed-loop servo positioning where backlash directly degrades positioning accuracy (robot joints, CNC rotary axes, laser cutting). P2 (standard grade) delivers ≤8 arcmin single-stage or ≤12 arcmin two-stage — adequate for general servo drives without precision positioning requirements. P1 costs more; over-specifying for a conveyor drive wastes budget. Calculate the arc error at your output radius from the backlash specification to determine which grade your application tolerance justifies.

คิวWhy does maximum input speed decrease for larger EP-BAB planetary gearbox frames?

Input speed limits are governed by centrifugal loading on planet gear bearings. Larger frames use heavier planet assemblies — at the same RPM, centrifugal force scales with mass and radius, pushing bearing DN values beyond operating limits. EP-BAB042/060/090 use lighter planet assemblies sustaining 5,000 rpm; EP-BAB115/142 are limited to 4,000 rpm; EP-BAB180 to 3,000 rpm; and EP-BAB220 to 2,000 rpm. In practice this is not a limitation — servo motors compatible with larger frames typically run at 1,500–3,000 rpm, well within the rated input speed limits.

คิวHow does full-body hardening maintain backlash stability over time in this gear reducer?

Standard case-hardening leaves a soft core. Under cyclic contact stress, the soft core deforms plastically — tooth geometry changes and backlash increases progressively. Full-body hardening treats the entire gear cross-section to uniform hardness with no soft core to deform. This is why EP-BAB high-precision planetary gearbox backlash remains stable within P1 specification across extended service — not just at commissioning.

คิวCan this planetary gearbox operate continuously at 100% rated torque?

Yes — rated torque is the continuous-duty value for sustained uniform load operation within 0–40°C ambient temperature. The peak torque (3× rated) is an instantaneous emergency stop capacity, not a continuous rating. For sustained operation above 80% rated torque or in elevated ambient temperatures, contact Korea Ever-Power's engineering team for a thermal confirmation before finalising your EP-BAB frame selection.

คิวWhich Korean servo motor brands have standard adapter plates for EP-BAB?

Standard adapter plates cover: Fanuc αi/βi, Yaskawa SGMJV/SGMSV, Mitsubishi HG-KR/HG-SR, Siemens 1FK7/1FT7, LS Electric APM/L7, Delta ECMA, and Hyundai HIGEN series. For other servo motor brands, provide the motor flange drawing — custom adapters are machined to order with 2-week lead time from our Korean facility.

คิวHow do I calculate acceleration torque to verify EP-BAB frame suitability?

Maximum acceleration torque is 60% of rated output torque (T₂s = 0.6 × T₂Nor). Calculate required acceleration torque as: T_acc = (J_load + J_gearbox) × α + T_friction, where α is angular acceleration in rad/s² and J values are inertias reflected to output shaft. Verify T_acc ≤ 0.6 × T₂Nor for the selected frame. For frequent rapid acceleration cycles (e.g., pick-and-place at 10+ cycles/minute), also apply the duty-cycle service factor from the selection table — and step up one frame if the calculated factor exceeds 1.0 at your operating hours per day.