{"id":599,"date":"2026-05-29T05:42:07","date_gmt":"2026-05-29T05:42:07","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=599"},"modified":"2026-05-29T05:42:07","modified_gmt":"2026-05-29T05:42:07","slug":"ep-kf-kh-hypoid-gear-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/et\/toode\/ep-kf-kh-hypoid-gear-planetary-gearbox\/","title":{"rendered":"EP-KF \/ EP-KH Series Hypoid Gear Planetary Gearbox"},"content":{"rendered":"

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EP-KF \/ EP-KH Series \u2014 Hypoid Gear Planetary Gearbox with Hollow-Shaft Options<\/h2>\n
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\"EP-KF<\/p>\n

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Hypoid
\nGear<\/div>\n
Offset-axis mechanism<\/div>\n<\/div>\n
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Hollow
\nShaft<\/div>\n
S3\/S4\/KH variants<\/div>\n<\/div>\n
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\u22643′<\/div>\n
Backlash single-stage<\/div>\n<\/div>\n
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\u226596%<\/div>\n
Single-stage efficiency<\/div>\n<\/div>\n<\/div>\n

\n\u2190 Browse All Planetary Gearbox Series
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\u2605 A Different Gear Mechanism \u2014 Hypoid Gear, Not Planetary<\/div>\n

Every other Korea Ever-Power gearbox in this range uses a planetary gear arrangement \u2014 sun gear, planet carriers, ring gear. EP-KF and EP-KH use a hypoid gear pair<\/strong>: spiral bevel gears whose input and output axes are offset rather than intersecting. This mechanism produces lower operating noise and enables hollow-shaft installation variants that the planetary architecture cannot provide in the same frame size.<\/p>\n<\/div>\n

The EP-KF and EP-KH series hypoid gear gearboxes<\/strong> extend the Korea Ever-Power transmission range with a gear mechanism that is selected specifically for its noise characteristics, its offset-axis geometry, and its hollow-shaft installation options. Four variants address different output interface requirements: KF S1\/S2<\/strong> with solid output shaft, KF-S3<\/strong> with a hollow bore that allows a machine shaft to pass through the gearbox body, KF-S4<\/strong> with hollow shaft and shrink-disc clamping for shaft connection without a keyway, and KH<\/strong> with hollow shaft and rotating output flange for direct-face load mounting.<\/p>\n

Output torque spans 18 N\u00b7m to 1,600 N\u00b7m across seven frame sizes from KF060 to KF240. Single-stage backlash is \u22643 arcmin and two-stage \u22644 arcmin \u2014 wider than the P0 \u22641 arcmin available in the EP-AB planetary series<\/a> but appropriate for the industrial automation, food processing, and packaging applications that are the primary KF\/KH use cases. The operating temperature range is 0 \u00b0C to +90 \u00b0C<\/strong> \u2014 the hypoid gear lubricant specification does not extend below 0 \u00b0C.<\/p>\n

\u25b8 Temperature note: <\/span>
\nEP-KF\/KH operating range is 0 \u00b0C to +90 \u00b0C<\/strong>. This differs from most Korea Ever-Power planetary series (\u221210 \u00b0C to +90 \u00b0C). EP-KF\/KH is not suitable for outdoor Korean winter installations or cold-room applications below 0 \u00b0C. For sub-zero temperature applications, specify a planetary series with the \u221210 \u00b0C lower limit.<\/span><\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Hypoid Gear vs Planetary Gear \u2014 Why the Mechanism Matters for Your Application<\/h2>\n
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PLANETARY GEAR \u2014 Coaxial, High Precision<\/p>\n

Motor shaft \u2500\u2500\u2192 [Sun Gear]
\n\u2193 \u2193 \u2193
\n[Planet] [Planet] [Planet]
\n\u2193 \u2193 \u2193
\n[Ring Gear] \u2192 Output
\nInput\/Output: same axis (inline)
\nBacklash: P0 \u22641′ achievable
\nTemp: \u221210 to +90 \u00b0C<\/div>\n

HYPOID GEAR \u2014 Offset Axis, Low Noise<\/p>\n

Motor shaft \u2500\u2500\u2192 [Hypoid Pinion]
\n\u2198 (offset)
\n[Hypoid Ring Gear]
\n\u2193
\nOutput shaft
\nAxes are OFFSET \u2014 not intersecting
\nNoise: lower (smooth face contact)
\nHollow shaft: available (S3\/S4\/KH)
\nTemp: 0 to +90 \u00b0C only<\/div>\n<\/div>\n<\/div>\n

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Three Reasons Korean Engineers Specify KF\/KH Over Planetary<\/h3>\n
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\u2460 Lower Operating Noise in Sound-Sensitive Environments<\/strong><\/p>\n

The hypoid gear pair produces lower operating noise than a planetary arrangement at equivalent torque and speed, due to the gradual tooth engagement across the curved hypoid gear face rather than the discrete mesh engagement of spur or helical planet gears. For Korean food and beverage processing equipment, pharmaceutical manufacturing lines, and precision printing machinery operating in sound-controlled environments, EP-KF specifies a lower noise floor at the drive unit than an equivalent planetary gearbox of the same output torque.<\/p>\n<\/div>\n

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\u2461 Hollow-Shaft Installation \u2014 Machine Shaft Passes Through the Gearbox<\/strong><\/p>\n

KF-S3, KF-S4, and KH variants have a hollow bore through the gearbox output stage, allowing a machine’s driven shaft to pass completely through the gearbox body rather than connecting to a stub output shaft. This eliminates the output coupling, reduces the overall drive unit length, and maintains a direct structural connection between the driven shaft and the machine frame \u2014 a layout common in Korean conveyor drive heads, rotary table drives, and packaging machine actuators where machine shaft continuity is a design requirement.<\/p>\n<\/div>\n

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\u2462 Offset Axis Geometry \u2014 Motor Positioned Off-Centre From Output Shaft<\/strong><\/p>\n

Unlike planetary gearboxes where the motor and output shaft must share a common centreline, the hypoid gear set’s input pinion axis is offset from the output ring gear axis. This means the servo motor can be positioned off-centre from the driven shaft axis \u2014 a layout that can reduce the installed height of a drive unit where the motor cannot be behind the shaft centreline due to space constraints, while the output shaft remains exactly on the driven shaft axis.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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EP-KF\/KH vs Planetary Series \u2014 When to Choose Each<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n
Application Requirement<\/th>\n\u2192 EP-KF\/KH \u2605<\/th>\n\u2192 Planetary (EP-AB\/AF etc.)<\/th>\n<\/tr>\n<\/thead>\n
Output shaft type<\/td>\nHollow bore needed (S3\/S4\/KH) OR solid shaft<\/td>\nSolid output shaft (standard planetary)<\/td>\n<\/tr>\n
Noise sensitivity<\/td>\nQuiet environments \u2014 food, pharma, printing<\/td>\nStandard industrial noise floor is acceptable<\/td>\n<\/tr>\n
Backlash requirement<\/td>\n\u22643 arcmin (single-stage) acceptable<\/td>\n\u22641 arcmin (P0) or \u22643 arcmin (P1) required<\/td>\n<\/tr>\n
Minimum temperature<\/td>\n0 \u00b0C minimum \u2014 indoor only<\/td>\n\u221210 \u00b0C \u2014 outdoor or cold-room use<\/td>\n<\/tr>\n
Motor-to-output axis<\/td>\nOffset axes acceptable or required<\/td>\nCoaxial (inline) required<\/td>\n<\/tr>\n
T\u00f5husus<\/td>\n\u226596% single-stage (slightly lower than planetary)<\/td>\n\u226597% single-stage<\/td>\n<\/tr>\n
Max torque in range<\/td>\n1,600 N\u00b7m (KF240)<\/td>\nUp to 3,805 N\u00b7m (EP-AFH240)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

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Four Output Variants \u2014 KF S1\/S2, KF-S3, KF-S4, and KH<\/h2>\n
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KF S1 \/ KF S2<\/h3>\n
Motor \u2500\u2500[Hypoid]\u2500\u2500\u25ba Solid Shaft
\nS1: smooth
\nS2: with keyway<\/div>\n

Standard solid output shaft \u2014 the directly equivalent of a planetary gearbox’s output shaft in terms of load connection. Use KF S1\/S2 when the application requires a solid output shaft connected to a coupling, gear, or pulley, and the hollow-shaft options of S3\/S4\/KH are not needed. S1 (smooth shaft) for clamped connections; S2 (with keyway) for keyed hub connections.<\/p>\n<\/div>\n

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KF-S3 \u2014 Hollow Shaft<\/h3>\n
Motor \u2500\u2500[Hypoid]\u2500\u2500\u2510
\n\u251c\u2500\u2500 Hollow bore \u25ce
\nMachine shaft \u2500\u2500\u2500\u2500\u2500\u2518 (passes through)<\/div>\n

The hollow bore of KF-S3 allows the driven machine shaft to pass completely through the gearbox body. The gearbox clamps around the shaft via the hollow bore interface. This eliminates the output coupling and reduces drive unit axial depth \u2014 used in Korean conveyor head drives, rotary table through-shaft arrangements, and packaging machine actuators where a continuous machine shaft is a structural requirement.<\/p>\n<\/div>\n

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KF-S4 \u2014 Hollow Shaft + Shrink Disc<\/h3>\n
Motor \u2500\u2500[Hypoid]\u2500\u2500\u2510
\n\u251c\u2500\u2500 Hollow bore \u25ce
\nMachine shaft \u2500\u2500\u2500\u2500\u2500\u2518 [Shrink Disc \u2297]
\n(keyway-free clamp)<\/div>\n

KF-S4 adds a shrink-disc clamping mechanism to the hollow-shaft bore \u2014 the shaft is clamped without a keyway by tightening the shrink disc, which applies radial pressure uniformly around the shaft circumference. Preferred over S3 when the machine shaft must be connected without a keyway (smooth shaft, no machining required) and the clamping force distribution must be uniform to avoid shaft bending. Used in Korean high-cycle packaging and pharmaceutical machine drives.<\/p>\n<\/div>\n

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KH \u2014 Hollow Shaft + Rotating Flange<\/h3>\n
Motor \u2500\u2500[Hypoid]\u2500\u2500\u2510
\n\u251c\u2500\u2500 Rotating Flange \u229e
\n\u2514\u2500\u2500 Hollow bore \u25ce
\n(Output IS the flange face)<\/div>\n

KH’s output is the rotating flange face rather than a shaft \u2014 the load is bolted directly to the flange. The hollow bore allows a tie rod, cable, or pneumatic supply tube to pass through the gearbox centreline while the load rotates with the flange. Used in Korean rotary table direct-drive configurations, circular fixture drives, and indexing table systems where the load is bolted to the gearbox output face and the gearbox body is fixed to the machine structure.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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EP-KF\/KH Series \u2014 Complete Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Common Specifications \u2014 All KF\/KH Variants<\/th>\n<\/tr>\n<\/thead>\n
Output Torque (T2N)<\/td>\n18 N\u00b7m (KF060) to 1,600 N\u00b7m (KF240)<\/td>\n<\/tr>\n
Gear Mechanism<\/td>\nHypoid gear \u2014 spiral bevel with offset axes<\/td>\n<\/tr>\n
Backlash (single-stage)<\/td>\n\u22643 kaareminuti<\/td>\n<\/tr>\n
Backlash (two-stage)<\/td>\n\u22644 arcmin<\/td>\n<\/tr>\n
Backlash grade codes<\/td>\nNone \u2014 fixed specification. No P0\/P1\/P2 grade selection.<\/td>\n<\/tr>\n
Single-Stage Ratios<\/td>\n3, 4, 5, 7, 10 (ratios 6, 8, 9 not available)<\/span><\/td>\n<\/tr>\n
Two-Stage Ratios<\/td>\n12, 16, 20, 25, 28, 35, 40, 50, 70, 100<\/td>\n<\/tr>\n
Single-Stage Efficiency<\/td>\n\u226596%<\/td>\n<\/tr>\n
Two-Stage Efficiency<\/td>\n\u226594%<\/td>\n<\/tr>\n
T\u00f6\u00f6temperatuur<\/td>\n0 \u00b0C to +90 \u00b0C (hypoid lubricant \u2014 NOT \u221210 \u00b0C)<\/td>\n<\/tr>\n
IP Rating<\/td>\nIP65 standard<\/td>\n<\/tr>\n
M\u00e4\u00e4rimine<\/td>\nHypoid gear oil \u2014 sealed, maintenance-free (within temperature range)<\/td>\n<\/tr>\n
Frame Sizes<\/td>\nKF060 \/ KF075 \/ KF100 \/ KF140 \/ KF180 \/ KF210 \/ KF240<\/td>\n<\/tr>\n
Output Variants<\/td>\nKF S1 (smooth solid) \u00b7 KF S2 (keyed solid) \u00b7 KF-S3 (hollow bore) \u00b7 KF-S4 (hollow + shrink disc) \u00b7 KH (hollow + rotating flange)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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\u25b8 Critical: 0 \u00b0C minimum operating temperature \u2014 the most important specification difference <\/span><\/p>\n

The hypoid gear lubricant used in EP-KF\/KH has a lower operating temperature limit of 0 \u00b0C. Attempting to operate below 0 \u00b0C will result in inadequate lubrication, increased friction, and accelerated gear wear. This makes EP-KF\/KH unsuitable for: outdoor Korean winter installations, cold-room food storage drives, outdoor agricultural machinery (Korean winter below 0 \u00b0C), or any installation where ambient temperature may reach below 0 \u00b0C. For these applications, specify an EP planetary series (EP-AB, EP-AF, or EP-AE) which carry the \u221210 \u00b0C lower limit with standard planetary grease.<\/p>\n<\/div>\n<\/section>\n

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Model Designation Guide \u2014 EP-KF and EP-KH<\/h2>\n
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EP-KF 100 \/ 25 \/ S2 \u2190 solid shaft with keyway<\/div>\n
EP-KF-S3 100 \/ 25 \u2190 hollow bore<\/div>\n
EP-KF-S4 100 \/ 25 \u2190 hollow + shrink disc<\/div>\n
EP-KH 100 \/ 25 \u2190 hollow + rotating flange<\/div>\n
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EP-KF \/ EP-KH<\/div>\n
Hypoid gear series
\nKF = solid\/hollow shaft
\nKH = hollow + flange<\/div>\n<\/div>\n
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100<\/div>\n
Body diameter 100 mm
\nKF scale: 060~240<\/div>\n<\/div>\n
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25<\/div>\n
Gear ratio i=25:1
\n(two-stage)<\/div>\n<\/div>\n
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S1\/S2<\/div>\n
KF only:
\nS1 smooth \/ S2 keyed
\nS3 hollow \/ S4 shrink<\/div>\n<\/div>\n
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[no grade]<\/div>\n
No P0\/P1\/P2
\nFixed: \u22643′(1-stage)
\n\u22644′(2-stage)<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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Applications \u2014 Hypoid Gear Drives in Korean Industry<\/h2>\n
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Food Processing Lines \u2014 Low Noise, KF S2 or KF-S3<\/h3>\n

Korean food and beverage production lines operating in enclosed facilities where operators work near running equipment specify low-noise drive units to meet Korean Occupational Safety and Health standards for workplace noise levels. EP-KF delivers lower operating noise than an equivalent planetary gearbox at the same output torque and speed \u2014 relevant for Korean dairy, beverage filling, and ready-meal production lines where the drive units run in close proximity to processing operators throughout multi-hour shifts. KF-S3 hollow-shaft variant is commonly used for conveyor head drives where the conveyor shaft passes through the gearbox body. Compatible with precision CV drive shafts for offset conveyor drive layouts.<\/p>\n<\/div>\n

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Pharmaceutical Manufacturing \u2014 KF-S4 Shrink Disc for Clean Connections<\/h3>\n

Korean pharmaceutical production equipment requires drive components that can be assembled and disassembled cleanly for validation and maintenance procedures, without keyway machining that creates particle-trapping pockets on machine shafts. KF-S4’s shrink-disc hollow shaft clamps to a smooth unkeyed shaft without any shaft machining \u2014 the connection is released by loosening the shrink disc, allowing the gearbox to be slid off for cleaning or replacement. This clean-assembly property makes KF-S4 the specified choice for Korean GMP oral solid dosage and tablet coating machine drives at 0 \u00b0C to +90 \u00b0C ambient temperature.<\/p>\n<\/div>\n

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Printing and Packaging Machines \u2014 KH Rotating Flange for Rotary Actuators<\/h3>\n

Korean commercial printing machines and flexible packaging equipment use rotary actuators where the gearbox body is fixed to the machine frame and the output flange rotates to drive a cam, die, or seal jaw. KH’s rotating output flange \u2014 with hollow bore for pneumatic or cable throughput \u2014 serves this application directly. The hypoid gear mechanism’s lower noise is also valued in these applications where the machine operator station is adjacent to the printing or packaging station. KH075 and KH100 at ratios 5:1\u201325:1 cover Korean web-fed printing machine auxiliary drive requirements.<\/p>\n<\/div>\n

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Rotary Table Direct Drive \u2014 KH for Through-Bore Rotary Tables<\/h3>\n

Korean precision rotary tables with a central bore for cable, pneumatic, or hydraulic throughput use KH’s rotating flange and hollow bore for the drive unit \u2014 the table top is bolted to the KH flange face, and cables or supply tubes pass through the hollow bore as the table rotates. This configuration eliminates the rotary union or cable management system that would be required with a solid-shaft gearbox driving through a coupling. KH100 and KH140 at ratios 20:1\u2013100:1 cover Korean indexing and positioning table drive requirements in the 0 \u00b0C to +90 \u00b0C temperature range.<\/p>\n<\/div>\n

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Conveyor Head Drives \u2014 KF-S3 Through-Shaft at Low Noise<\/h3>\n

Korean indoor industrial conveyor systems \u2014 electronics assembly, PCB handling, automotive component inspection lines \u2014 use KF-S3 for head-drum drives where the conveyor belt shaft passes through the gearbox hollow bore. The S3 arrangement maintains a continuous shaft between the drive bearing housings on either side of the conveyor head, improving shaft alignment and reducing vibration transmission to the conveyor structure. The lower noise of the hypoid gear mechanism is valued in Korean electronics assembly facilities where the manufacturing environment specifies low ambient noise. Downstream systems integrate worm gear reducers for additional speed reduction on slow-speed inspection conveyors.<\/p>\n<\/div>\n

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Agricultural Post-Harvest Processing \u2014 KF S2 Indoor Drives<\/h3>\n

Korean post-harvest grain drying facilities, rice processing plants, and indoor food packaging lines \u2014 all of which operate at ambient temperatures above 0 \u00b0C \u2014 use EP-KF for auger drives, sorting belt heads, and packaging conveyor drives where lower noise compared to a planetary unit is a secondary selection criterion alongside compact installation dimensions. KF S2 at KF100\u2013KF140 covers the torque range of Korean post-harvest processing drive applications. Integration with agricultural bevel gearboxes for multi-output post-harvest sorting line configurations.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Quality Certifications & Testing Standards<\/h2>\n
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ISO 9001<\/div>\n
Quality Management<\/div>\n<\/div>\n
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CE<\/div>\n
EU Machinery Directive<\/div>\n<\/div>\n
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KS<\/div>\n
Korean Industrial Standard<\/div>\n<\/div>\n
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RoHS<\/div>\n
Hazardous Substance Free<\/div>\n<\/div>\n<\/div>\n