{"id":786,"date":"2026-06-12T07:25:42","date_gmt":"2026-06-12T07:25:42","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=786"},"modified":"2026-06-12T07:25:42","modified_gmt":"2026-06-12T07:25:42","slug":"ep-tnf-flange-output-helical-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/el\/product\/ep-tnf-flange-output-helical-planetary-gearbox\/","title":{"rendered":"EP-TNF Round-Flange Output Helical Planetary Gearbox"},"content":{"rendered":"
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EP-TNF Series \u2014 Round-Flange Helical Planetary Gearbox | Frames 060\u2013220 mm, P1\/P2, \u00d880\u2013292 mm Flange<\/h2>\n
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\"EP-TNF<\/p>\n

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\u22645 arcmin<\/div>\n
P1 Backlash<\/div>\n<\/div>\n
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\u226597%<\/div>\n
L1 Efficiency<\/div>\n<\/div>\n
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\u00d880\u2013292<\/div>\n
Flange OD mm<\/div>\n<\/div>\n
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6 Frames<\/div>\n
060\u2013220 mm<\/div>\n<\/div>\n<\/div>\n
\u2190 \u0394\u03b5\u03af\u03c4\u03b5 \u03cc\u03bb\u03b5\u03c2 \u03c4\u03b9\u03c2 \u03c3\u03b5\u03b9\u03c1\u03ad\u03c2 \u03c0\u03bb\u03b1\u03bd\u03b7\u03c4\u03b9\u03ba\u03ce\u03bd \u03ba\u03b9\u03b2\u03c9\u03c4\u03af\u03c9\u03bd \u03c4\u03b1\u03c7\u03c5\u03c4\u03ae\u03c4\u03c9\u03bd<\/a><\/div>\n<\/div>\n

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\u039f EP-TNF round-flange helical planetary gearbox<\/strong> is designed for applications where the load interface is a bolt circle, not a shaft bore. A robot arm link that fastens to the gearbox output face, a CNC rotary table whose housing pilot register seats the gearbox, a direct-drive indexing head \u2014 all require a bolt-circle flange at the gearbox output, not a shaft end that must then be coupled to the load. Six frame sizes (060\u2013220 mm) cover output torques from 50 N\u00b7m to 2,000 N\u00b7m with ratios i=3 to i=100. Two backlash grades \u2014 P1 (\u22645 arcmin) and P2 (\u22647 arcmin) \u2014 cover Korean servo positioning and speed-control applications respectively. The 042 frame is not available in TNF; the minimum is 060.<\/p>\n

Round-flange precision planetary gearbox \u00b7 Direct robot arm \/ rotary table interface \u00b7 IEC \/ NEMA universal adapter \u00b7 Korea warehouse stock<\/p>\n

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\ud83d\udd29 No Coupling Needed<\/div>\n
Bolt circle output \u2014 load fastens directly to flange face. Eliminates coupling backlash and wear.<\/div>\n<\/div>\n
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\ud83c\udfaf \u22640.02 mm Runout<\/div>\n
Ground flange face and pilot register \u2014 reliable concentricity for rotary table and robot arm mounting.<\/div>\n<\/div>\n
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\ud83d\udcd0 Higher Tilting Moment<\/div>\n
Wide flange bearing span resists cantilevered arm load better than shaft-output equivalents.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

\"EP-TNF<\/p>\n

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EP-TNF Series \u2014 Complete Performance Specifications<\/h2>\n

All values at 20\u00b0C, rated load, sealed grease lubrication. EP-TNF starts at frame 060 \u2014 no 042 frame in the TNF series.<\/p>\n

\u00a0\u00a0\u00a0\"EP-TNF<\/p>\n

\n\n\n\n<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\n\u039c\u03bf\u03bd\u03ac\u03b4\u03b1<\/th>\n\u03a3\u03c4\u03ac\u03b4\u03b9\u03bf<\/th>\nTNF060<\/th>\nTNF090<\/th>\nTNF115<\/th>\nTNF142<\/th>\nTNF180<\/th>\nTNF220<\/th>\n<\/tr>\n<\/thead>\n
Rated output torque T\u2082\u2099<\/td>\nN\u00b7m<\/td>\nL1 (i=3\u201310)<\/td>\n50\u201360<\/td>\n130\u2013160<\/td>\n208\u2013330<\/td>\n342\u2013650<\/td>\n588\u20131,200<\/td>\n1,140\u20132,000<\/td>\n<\/tr>\n
L2 (i=12\u2013100)<\/td>\n50\u201360<\/td>\n130\u2013160<\/td>\n208\u2013330<\/td>\n342\u2013650<\/td>\n588\u20131,200<\/td>\n1,140\u20132,000<\/td>\n<\/tr>\n

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Maximum output torque T\u2082max<\/td>\nN\u00b7m<\/td>\nL1\/L2<\/td>\n3 \u00d7 T\u2082\u2099 (3\u00d7 rated)<\/td>\n<\/tr>\n

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Rated input speed n\u2099<\/td>\n\u03c3\u03c4\u03c1\u03bf\u03c6\u03ad\u03c2\/\u03bb\u03b5\u03c0\u03c4\u03cc<\/td>\nL1\/L2<\/td>\n5,000<\/td>\n4,000<\/td>\n4,000<\/td>\n3,000<\/td>\n3,000<\/td>\n2,000<\/td>\n<\/tr>\n
Maximum input speed n\u2081max<\/td>\n\u03c3\u03c4\u03c1\u03bf\u03c6\u03ad\u03c2\/\u03bb\u03b5\u03c0\u03c4\u03cc<\/td>\nL1\/L2<\/td>\n10,000<\/td>\n8,000<\/td>\n8,000<\/td>\n6,000<\/td>\n6,000<\/td>\n4,000<\/td>\n<\/tr>\n

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Precision backlash P1<\/td>\narcmin<\/td>\nL1 (i=3\u201310)<\/td>\n\u2264 5 arcmin<\/td>\n<\/tr>\n
Standard backlash P2<\/td>\narcmin<\/td>\nL1\/L2<\/td>\n\u2264 5 arcmin (L1) \u00a0\/\u00a0 \u2264 7 arcmin (L2)<\/td>\n<\/tr>\n

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\u03a3\u03c4\u03c1\u03b5\u03c0\u03c4\u03b9\u03ba\u03ae \u03b1\u03ba\u03b1\u03bc\u03c8\u03af\u03b1<\/td>\nN\u00b7m\/arcmin<\/td>\nL1<\/td>\n7<\/td>\n14<\/td>\n25<\/td>\n50<\/td>\n145<\/td>\n225<\/td>\n<\/tr>\n

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Permissible radial force Fr_max<\/sub><\/td>\n\u0392<\/td>\nL1\/L2<\/td>\n1,530<\/td>\n3,250<\/td>\n6,700<\/td>\n9,400<\/td>\n14,500<\/td>\n50,000<\/td>\n<\/tr>\n
Permissible axial force Fa_max<\/sub><\/td>\n\u0392<\/td>\nL1\/L2<\/td>\n630<\/td>\n1,625<\/td>\n3,350<\/td>\n4,700<\/td>\n7,250<\/td>\n25,000<\/td>\n<\/tr>\n

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\u0391\u03c0\u03cc\u03b4\u03bf\u03c3\u03b7 \u03b7<\/td>\n%<\/td>\nL1 \/ L2<\/td>\n\u2265 97% (L1) \u00a0\/\u00a0 \u2265 94% (L2)<\/td>\n<\/tr>\n
Weight (approx.)<\/td>\n\u03ba\u03b9\u03bb\u03ac<\/td>\nL1 \/ L2<\/td>\n1.3 \/ 1.5<\/td>\n3.7 \/ 9<\/td>\n7 \/ \u2014<\/td>\n14.5 \/ \u2014<\/td>\n29 \/ 33<\/td>\n48 \/ 60<\/td>\n<\/tr>\n
Noise (n=3,000 rpm, no-load)<\/td>\ndB(A)<\/td>\nL1\/L2<\/td>\n\u226458<\/td>\n\u226460<\/td>\n\u226463<\/td>\n\u226465<\/td>\n\u226467<\/td>\n\u226470<\/td>\n<\/tr>\n
\u0394\u03b9\u03ac\u03c1\u03ba\u03b5\u03b9\u03b1 \u03b6\u03c9\u03ae\u03c2<\/td>\nhours<\/td>\nL1\/L2<\/td>\n20,000 h (continuous S1)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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Temperature<\/strong>
\n\u221210\u00b0C to +90\u00b0C<\/div>\n
Protection<\/strong>
\n\u03a0\u03c1\u03cc\u03c4\u03c5\u03c0\u03bf IP65<\/div>\n
\u039b\u03ac\u03b4\u03c9\u03bc\u03b1<\/strong>
\nSealed grease \u2014 lifetime<\/div>\n
\u0395\u03b3\u03ba\u03b1\u03c4\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7<\/strong>
\nAny orientation<\/div>\n
Output interface<\/strong>
\nRound flange + pilot register<\/div>\n
Gear quality<\/strong>
\nDIN Class 5\u20136 helical<\/div>\n<\/div>\n<\/section>\n

 <\/p>\n

Six Reasons Engineers Choose EP-TNF Over Shaft-Output Planetary + Coupling<\/h2>\n

\"EP-TNF<\/p>\n

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\u2460 Coupling Elimination \u2014 One Fewer Wear Component<\/div>\n

Every coupling in a servo drive chain is a maintenance item and a backlash source. A bellows coupling starts at 0.2\u20130.5 arcmin new and grows with torsional fatigue cycles; a jaw coupling starts at 0.5\u20131.5 arcmin and grows faster. EP-TNF’s bolt-circle output replaces the coupling with a fixed structural interface. The gearbox backlash certificate value is the total system backlash \u2014 there is no coupling contribution to estimate, measure, or periodically re-tighten. For a system where 5 arcmin total backlash is the budget, EP-TNF P1 delivers that as a single measured, certified value.<\/p>\n<\/div>\n

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\u2461 Ground Flange Face \u2014 \u22640.02 mm Runout, Self-Centering Register<\/div>\n

The output flange face and pilot register are ground after full gearbox assembly, referenced to the actual rotation axis. Runout \u22640.02 mm TIR is achieved because the grinding datum is the assembled bearing pair \u2014 not a nominal design axis. The pilot register locates the mating hub or table housing concentrically with the rotation axis; the bolt circle provides axial retention and torque transmission. Each time the gearbox is re-installed in the same pilot bore, concentricity is restored automatically without dial indicator realignment.<\/p>\n<\/div>\n

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\u2462 Higher Tilting Moment Capacity Than Shaft-Output Equivalents<\/div>\n

A cantilevered robot arm or rotary table fixture applies a bending moment at the output interface. On a shaft-output gearbox, this moment is reacted by the output shaft bearing span \u2014 limited by the shaft length inside the housing. On EP-TNF, the moment is reacted by the bolt circle at the full flange face diameter (\u00d880\u2013292 mm depending on frame), distributed across all flange bolts. The effective lever arm for moment resistance is the flange radius \u2014 larger than the shaft bearing span at equivalent torque rating, resulting in higher tilting moment capacity.<\/p>\n<\/div>\n

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\u2463 Same Helical Planetary Core as EP-TM \u2014 Same Efficiency<\/div>\n

The helical planetary gear set inside EP-TNF is identical to EP-TM at the same frame size. Efficiency \u226597% L1 \/ \u226594% L2 is the same \u2014 no efficiency penalty from the flange interface. The slight backlash difference (EP-TNF P1 \u22645 arcmin versus EP-TM P1 \u22643 arcmin) reflects the flange bearing geometry rather than lower gear precision. For applications comparing EP-TM + coupling versus EP-TNF direct, the EP-TNF option typically results in lower total system backlash because it eliminates the coupling contribution entirely.<\/p>\n<\/div>\n

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\u2464 ISO 9409-1 Robot Wrist Flange Compatibility<\/div>\n

The EP-TNF output flange dimensions are compatible with ISO 9409-1 robot wrist interface standard at several frame sizes \u2014 TNF060 (\u00d880 mm) matches size 50, TNF090 (\u00d8116 mm) matches size 80. This allows standard end-effector tool change adapters to mount directly to the EP-TNF output face in robot integration applications, without any custom adapter ring. Korea Ever-Power confirms the specific bolt circle and pilot register dimensions against the required ISO 9409-1 size designation at enquiry, same day, at no charge.<\/p>\n<\/div>\n

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\u2465 Backlash Certificate Referenced to Flange Face \u2014 Not Shaft End<\/div>\n

The backlash measurement on the EP-TNF delivery certificate is taken at the output flange face, at \u00b13% T\u2082\u2099 preload, referenced to the actual flange rotation axis. This is the same reference point as the machine interface \u2014 the measured value directly enters the system error budget without any transformation. For shaft-output gearboxes, the backlash is measured at the shaft end; the machine designer must then add coupling compliance to get the total system backlash. EP-TNF’s flange measurement eliminates this additional calculation step.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

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Available Ratios and Motor Input Flange Dimensions<\/h2>\n
\n\n\n\n\n\n\n
\u03a3\u03c4\u03ac\u03b4\u03b9\u03bf<\/th>\nAvailable Ratios i<\/th>\n\u03b7<\/th>\nBacklash P1<\/th>\n\u039a\u03b1\u03bb\u03cd\u03c4\u03b5\u03c1\u03bf \u03b3\u03b9\u03b1<\/th>\n<\/tr>\n<\/thead>\n
L1 Single<\/td>\n3 \u00b7 4 \u00b7 5 \u00b7 6 \u00b7 7 \u00b7 8 \u00b7 10<\/td>\n\u226597%<\/td>\n\u22645\u2032<\/td>\nRobot joints, CNC rotary table, direct-drive indexers<\/td>\n<\/tr>\n
L2 Dual<\/td>\n12 \u00b7 15 \u00b7 20 \u00b7 25 \u00b7 30 \u00b7 35 \u00b7 40 \u00b7 50 \u00b7 60 \u00b7 70 \u00b7 80 \u00b7 100<\/td>\n\u226594%<\/td>\n\u22647\u2032<\/td>\nHigh-ratio servo, inertia-matched drives<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Motor Input Flange Dimensions \u2014 TNF Single-Stage L1<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n
\u03a0\u03bb\u03b1\u03af\u03c3\u03b9\u03bf<\/th>\nOutput flange \u00d8<\/th>\nMotor pilot \u00d8 (C1)<\/th>\nMotor bolt circle \/ thread (C2)<\/th>\nInput shaft \u00d8 (C3)<\/th>\nDepth C4<\/th>\nTotal length C9<\/th>\n<\/tr>\n<\/thead>\n
TNF060<\/td>\n\u00d880<\/td>\n\u00d866.7 \/ \u00d870 \/ \u00d890<\/td>\n4-M4\u00d710 \/ M5\u00d712 \/ M6\u00d714<\/td>\n\u00d88 \/ \u00d811 \/ \u00d819<\/td>\n34<\/td>\n115 \u03c7\u03b9\u03bb\u03b9\u03bf\u03c3\u03c4\u03ac<\/td>\n<\/tr>\n
TNF090<\/td>\n\u00d8116<\/td>\n\u00d890 \/ \u00d8100 \/ \u00d8115 \/ \u00d8145<\/td>\nM5\u00d712 \u2013 M8\u00d720<\/td>\n\u00d819 \/ \u00d816 \/ \u00d819,22<\/td>\n42<\/td>\n147 mm<\/td>\n<\/tr>\n
TNF115<\/td>\n\u00d8152<\/td>\n\u00d8145 \/ \u00d8200<\/td>\n4-M8\u00d720 \/ 4-M12\u00d728<\/td>\n\u00d819,22 \/ \u00d835<\/td>\n64<\/td>\n199 mm<\/td>\n<\/tr>\n
TNF142<\/td>\n\u00d8186<\/td>\n\u00d8145 \/ \u00d8200<\/td>\n4-M8\u00d720 \/ 4-M12\u00d728<\/td>\n\u00d822 \/ \u00d835<\/td>\n72<\/td>\n252 mm<\/td>\n<\/tr>\n
TNF180<\/td>\n\u00d8240<\/td>\n\u00d8200 \/ \u00d8215 \/ \u00d8235<\/td>\n4-M12\u00d728 \/ 4-M12\u00d730<\/td>\n\u00d835 \/ \u00d842<\/td>\n85<\/td>\n284 mm<\/td>\n<\/tr>\n
TNF220<\/td>\n\u00d8292<\/td>\n\u00d8200 \/ \u00d8215 \/ \u00d8235<\/td>\n4-M12\u00d728 \/ 4-M12\u00d730<\/td>\n\u00d835 \/ \u00d842 \/ \u00d855<\/td>\n109<\/td>\n358 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Output flange bolt circle, thread specification, and pilot register depth from Korea Ever-Power dimensional drawing. C1=motor register \u00d8, C3=motor shaft \u00d8. TNF180\/220 input dimensions configurable \u2014 specify motor at order.<\/p>\n<\/section>\n

<\/p>\n

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EP-TNF vs EP-TM vs EP-TMR \u2014 Three Form Factors, One Precision Level<\/h2>\n

The EP-TM, EP-TNF, and EP-TMR share the same helical planetary gear stage and achieve identical precision grades. The choice between them is entirely driven by the output interface geometry required by the machine design.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n
Feature<\/th>\nEP-TM<\/a><\/th>\nEP-TNF<\/th>\nEP-TMR<\/a><\/th>\n<\/tr>\n<\/thead>\n
Output interface<\/td>\nKeyed\/round shaft<\/td>\nRound flange<\/td>\nKeyed\/round shaft, 90\u00b0<\/td>\n<\/tr>\n
Output direction<\/td>\nInline (0\u00b0)<\/td>\nInline (0\u00b0)<\/td>\nRight-angle (90\u00b0)<\/td>\n<\/tr>\n
Frame sizes<\/td>\n042\u2013220<\/td>\n060\u2013220 only<\/td>\n042\u2013220<\/td>\n<\/tr>\n
Efficiency L1<\/td>\n\u226597%<\/td>\n\u226597%<\/td>\n\u226595%<\/td>\n<\/tr>\n
Backlash P1 (L1)<\/td>\n\u22643\u2032<\/td>\n\u22645\u2032<\/td>\n\u22646\u2032<\/td>\n<\/tr>\n
Tilting moment resistance<\/td>\nShaft-limited<\/td>\nHigh (wide flange)<\/td>\nMedium<\/td>\n<\/tr>\n
Best Korean application<\/td>\nRack-and-pinion, ball screw, coupling drive<\/td>\nRobot flange, rotary table, direct-mount indexer<\/td>\nSpace-constrained 90\u00b0 redirection<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
Note on P1 backlash difference: <\/strong>
\nThe EP-TNF P1 specification of \u22645 arcmin is slightly wider than the EP-TM P1 of \u22643 arcmin. This reflects the wider output bearing span in the flange design \u2014 the larger-diameter flange bearing pair introduces a small additional torsional compliance path compared to the compact shaft-output bearing set. At the application level, both \u22643 arcmin and \u22645 arcmin deliver sub-arc-minute repeatability in most Korean positioning applications. If \u22641 arcmin is required, specify the EP-TEG ultra-precision series<\/a>.<\/span><\/div>\n<\/section>\n

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EP-TNF in Korean Industry \u2014 Six Flange-Critical Applications<\/h2>\n

\"Korea<\/p>\n

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\u2460 Korean COBOT Joint Drives (J1\u2013J3)<\/div>\n

Korean collaborative robot manufacturers (Rainbow Robotics, Doosan Robotics) specify large-diameter output flanges on the shoulder and elbow joints to directly interface with the aluminium arm extrusion. TNF090\/115 at i=25\u201350 P1 is the standard configuration. The flange face acts as the structural support surface for the arm link \u2014 no separate adapter ring required, which reduces arm mass and the inertia calculation at each joint. See the robot joint drive guide \u2192<\/p>\n<\/div>\n

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\u2461 Korean 5-Axis CNC Rotary Table (B\/C Axis)<\/div>\n

Korean CNC machine tool builders (Doosan Machine Tools, Hwacheon) use TNF115\/142 at i=50\u2013100 for the B and C rotary table axes. The oversized flange (\u00d8152\/\u00d8186 mm) provides the structural stiffness required to hold workpiece fixtures at the table face under cutting forces. The ground flange face (runout \u22640.02 mm) defines the table face perpendicularity \u2014 directly affecting the 5-axis angular calibration accuracy.<\/p>\n<\/div>\n

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\u2462 Korean Semiconductor EFEM \u03b8-Axis<\/div>\n

Equipment Front End Modules in Korean fab tool sets (used at Samsung Display, LGD) use TNF060\/090 for the wafer transfer robot rotation axis. The small TNF060 (\u00d880 mm flange, 1.3 kg) fits within the EFEM footprint constraint while providing the P1 backlash needed for precise wafer slot alignment. The sealed grease eliminates the particle generation from oil lubrication that would compromise cleanroom ISO Class 3 requirements.<\/p>\n<\/div>\n

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\u2463 Korean Laser Cutting Machine Rotary Axis<\/div>\n

Korean fibre laser cutting machines (Han’s Laser Korea, Bystronic Korea) use TNF090 or TNF115 for the rotary axis that indexes tubular workpieces. The flange output mounts directly to the chuck backplate \u2014 the ground flange face ensures chuck face perpendicularity to the rotary axis, which determines cut perpendicularity on round tube profiles. At i=25\u201350, the servo can produce high-speed index moves (360\u00b0\/0.2 s) for efficient tube processing cycles.<\/p>\n<\/div>\n

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\u2464 Korean Medical Imaging Equipment (CT\/MRI Gantry)<\/div>\n

Korean medical device OEMs (GE Healthcare Korea, Siemens Healthineers Korea operations) use TNF090\/115 in CT scanner gantry rotation drives. The large-diameter flange output provides the structural bearing for the rotating gantry ring \u2014 the low noise (\u226460\u201363 dB) is specified by hospital installation requirements, and the sealed grease eliminates the oil maintenance access difficulty in the closed gantry housing.<\/p>\n<\/div>\n

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\u2465 Korean Automatic Pallet Changer (APC) Rotation Drive<\/div>\n

Korean machining centre APC systems rotate 180\u00b0 to swap loaded and unloaded pallets. TNF115\/142 at i=20\u201340 drives this rotation via the output flange mounted directly to the APC turntable hub \u2014 no shaft, no coupling, no coupling alignment procedure. The TNF flange face is the precision interface that determines pallet position accuracy at the machining spindle. Pallet repeatability depends directly on output flange runout: TNF’s \u22640.02 mm flange face runout contributes <0.02 mm to APC positioning error.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

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How to Read an EP-TNF Model Code<\/h2>\n
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EP-TNF \u00a0090 \u00a0\u2013 \u00a0020 \u00a0\u2013 \u00a0S2 \u00a0\u2013 \u00a0P1 \u00a0( \u00a0\u00a0\u00a0\u00a0 )<\/div>\n
\n
\n
EP-TNF<\/div>\n
Series \u2014 flange output
\nhelical planetary gearbox<\/div>\n<\/div>\n
\n
090<\/div>\n
Frame size (mm)
\n060\/090\/115\/142\/180\/220<\/div>\n<\/div>\n
\n
020<\/div>\n
Gear ratio i
\nL1: 3\u201310 \u00b7 L2: 12\u2013100<\/div>\n<\/div>\n
\n
S2<\/div>\n
Shaft type (for input)
\nS1 = round \u00b7 S2 = keyed<\/div>\n<\/div>\n
\n
\u03a01<\/div>\n
Precision grade
\nP1 \u22645\u2032 \u00b7 P2 \u22645\u20137\u2032<\/div>\n<\/div>\n
\n
( \u00a0\u00a0\u00a0 )<\/div>\n
Motor interface code
\nspecify motor at order<\/div>\n<\/div>\n<\/div>\n<\/div>\n
TNF frame range starts at 060, not 042: <\/strong>
\nThe EP-TNF series starts at frame 060 and does not include a 042 frame. The TNF042 was not offered in the original POROVIN catalogue \u2014 the 042 mm frame is too small to accommodate the output flange bearing design at the required load capacity. If your application requires a flange-output gearbox in the 042 mm frame size range, contact Korea Ever-Power \u2014 custom flange-output units in small frame sizes are available on request for Korean OEM programmes with sufficient volume.<\/span><\/div>\n<\/section>\n

\"workshop<\/p>\n

\n

Frequently Asked Questions \u2014 EP-TNF Flange Output Planetary Gearbox<\/h2>\n
\n
\n

Q<\/span>
\nHow do I calculate whether the EP-TNF output flange can handle the tilting moment from my robot arm’s end-effector load?<\/h3>\n

The tilting (overturning) moment M_tilt at the output flange is calculated as: M_tilt = F_load \u00d7 L, where F_load is the total force (gravity + dynamic) from the arm and payload, and L is the distance from the output flange face to the centre of gravity of the supported load. Check M_tilt against the EP-TNF’s permissible tilting moment, which Korea Ever-Power provides in the dimensional datasheet for each frame. Alternatively, calculate the equivalent radial force at the shaft centreline: F_r_equiv = M_tilt \/ (flange face to bearing centreline distance), and check against the permissible radial force Fr_max<\/sub> from the specification table using the position factor method described in the radial load calculation guide. Korea Ever-Power performs this calculation for any specific application on request.<\/p>\n<\/div>\n

\n

Q<\/span>
\nMy Korean COBOT design uses a standard ISO 9283 flange pattern. Does the EP-TNF output flange match this standard directly?<\/h3>\n

The EP-TNF output flange dimensions are compatible with ISO 9283 mechanical interface specifications for most frame sizes, but the bolt circle diameter and pilot register diameter must be confirmed against your specific ISO 9283 size designation. Korea Ever-Power provides a detailed dimensional drawing for any EP-TNF model on request \u2014 provide the ISO 9283 interface size and the motor model number, and the drawing will confirm compatibility or identify any adapter ring requirement. For Korean COBOT OEMs with established flange patterns, custom output flanges with non-standard bolt circles and pilot register diameters are available with a 3\u20134 week lead time.<\/p>\n<\/div>\n

\n

Q<\/span>
\nIs the EP-TNF inertia value the same as the EP-TM for the same frame and ratio? Does the heavier flange output affect servo inertia matching?<\/h3>\n

The EP-TNF’s output flange is slightly heavier than the EP-TM’s output shaft section, and this difference is reflected in a marginally higher J_gearbox_input value. However, since J_gearbox_input is reflected through the square of the gear ratio (J_input = J_gearbox_input \/ i\u00b2 is not the correct formulation \u2014 the input-referred inertia of the gearbox body itself adds directly to J_motor at the motor shaft), the practical impact depends on whether the flange’s additional inertia is relevant for your application. For standard servo axes with i \u2265 5, the flange mass difference between TNF and TM adds less than 5% to the total motor-referred inertia \u2014 negligible for inertia matching purposes. Use the J_gearbox_input value from the Korea Ever-Power EP-TNF datasheet for precise calculations. The inertia matching methodology is explained in the inertia matching guide.<\/p>\n<\/div>\n

\n

Q<\/span>
\nWe need P0 (\u22641 arcmin) backlash on a flange-output gearbox for a Korean wafer handling robot. Which Korea Ever-Power series covers this?<\/h3>\n

The EP-TNF series provides P1 (\u22645 arcmin) as the highest precision grade available in this configuration. For P0 (\u22641 arcmin) with flange output, the correct specification is the EP-TEG ultra-precision series<\/a> \u2014 which provides \u22641 arcmin as standard across all ratios and frame sizes, and is available with flange output. The EP-TEG is designed specifically for Korean semiconductor and precision optics applications where P0 grade is a hard requirement, not an option. For wafer handler \u03b8-axis applications, the EP-TEG in combination with an encoder feedback loop typically achieves \u22640.1 arcmin effective repeatability at the output flange.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Drivetrain Integration \u2014 Complementary Products & Accessories<\/h2>\n
\n
\n

\"EP-TNF<\/p>\n

\n

KEY ACCESSORIES \u2014 EP-TNF SERIES<\/p>\n

Servo Motor Adapter Plate<\/span>
\nOutput Hub \/ Flange Bolt Kit<\/span>
\nEncoder Bracket<\/span>
\nBacklash Certificate<\/span><\/div>\n<\/div>\n<\/div>\n
\n
\n

CV Drive Shafts \u2014 Long-Distance Flange-to-Load Torque Routing<\/h3>\n

When EP-TNF output torque must reach a load positioned at a distance \u2014 solar tracker array shaft spanning multiple bays, gantry X-axis rack-and-pinion pinion offset from the motor mount, multi-station conveyor head pulley drive \u2014 a constant-velocity drive shaft<\/a> bridges the EP-TNF output flange to the remote drive element. The CV joint absorbs angular installation misalignment (\u00b13\u20138\u00b0 for standard industrial CV shafts) without transmitting the cyclical bending moment that a rigid intermediate shaft would impose on the output bearing at even slight misalignment. On Korean large-format laser cutting gantry X-axes, this combination is standard practice where perfect motor-to-rack alignment cannot be guaranteed after machine levelling.<\/p>\n<\/div>\n

\n

Worm Gear Reducers \u2014 High-Ratio Self-Locking Second Stage<\/h3>\n

For applications requiring combined ratio above i=100 with self-locking capability \u2014 vertical load-holding rotary drives, indexing tables that must hold position under gravity between index events \u2014 a worm gear reducer<\/a> downstream of EP-TNF provides self-locking and additional ratio at the output flange. The EP-TNF flange output can bolt directly to many worm reducer input housings, eliminating an intermediate coupling in the two-stage system. Verified combination: EP-TNF at i=10 (\u03b7\u226597%) \u00d7 worm at i=40 (\u03b7\u224860\u201365%) = combined i=400, overall \u03b7\u224858\u201363%. Where self-locking is not required, EP-TNF alone at i=100 dual-stage (\u03b7\u226594%) is the more efficient single-unit solution.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Customer Reviews & Field Performance<\/h2>\n
\n
\n
4.8<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n
Based on 90+ verified orders<\/div>\n<\/div>\n
\n
\n
\n

5 \u2605<\/span><\/p>\n

\n
<\/div>\n<\/div>\n

88%<\/span><\/p>\n<\/div>\n

\n

4 \u2605<\/span><\/p>\n

\n
<\/div>\n<\/div>\n

10%<\/span><\/p>\n<\/div>\n

\n

\u22643 \u2605<\/span><\/p>\n

\n
<\/div>\n<\/div>\n

2%<\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n

\n
\n
98%<\/div>\n
\u0398\u03b1 \u03be\u03b1\u03bd\u03b1\u03c0\u03b1\u03c1\u03b1\u03b3\u03b3\u03b5\u03af\u03bb\u03c9<\/div>\n<\/div>\n
\n
<1%<\/div>\n
\u03a0\u03bf\u03c3\u03bf\u03c3\u03c4\u03cc \u03b1\u03c0\u03bf\u03c4\u03c5\u03c7\u03af\u03b1\u03c2 \u03c0\u03b5\u03b4\u03af\u03bf\u03c5<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
\n
\n
H<\/div>\n
\n
Han J. \u2014 CNC Rotary Table Design Engineer<\/div>\n
Verified Purchase \u00b7 Daegu, South Korea<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

EP-TNF115 P1 i=50 dual-stage for the C-axis of our new 5-axis CNC machining centre. The \u00d8152 mm output flange bolts directly to the rotary table housing \u2014 no coupling, no adapter ring. Previous design used EP-TM with a bellows coupling; the coupling grew to 0.8 arcmin wear after 8,000 hours and we had to compensate in the controller. TNF flange-direct: 18 months in service, backlash measurement unchanged at 4.7 arcmin versus 4.8 arcmin delivery certificate. Korea Ever-Power confirmed direct fit to our table housing pilot bore, H7\/h6 fit, same day as enquiry.<\/p>\n

EP-TNF115, i=50, P1 \u00b7 5-axis CNC C-axis \u00b7 Coupling eliminated, 4.7 arcmin at 18 months<\/div>\n<\/div>\n
\n
\n
S<\/div>\n
\n
Song M. \u2014 Robot Systems Integrator<\/div>\n
Verified Purchase \u00b7 Suwon, South Korea<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

EP-TNF090 P1 i=25 for the J4 wrist roll joint on a 6-axis cobot we build for Korean general industry. The \u00d8116 mm flange outputs directly to the forearm link bolt pattern \u2014 no coupling, no adapter flange. At i=25 the inertia ratio J_load\/J_motor = 0.12:1, which tunes instantly in the servo drive. Output runout measured 0.018 mm TIR after assembly \u2014 within the \u22640.02 mm specification. At \u22643 kg payload the joint works flawlessly over 12 months and 3 cobot units with zero warranty issues.<\/p>\n

EP-TNF090, i=25, P1 \u00b7 Cobot J4 wrist \u00b7 0.018 mm runout, 12 months, 3 units zero issues<\/div>\n<\/div>\n
\n
\n
Y<\/div>\n
\n
Yun B. \u2014 Solar Tracker Mechanical Engineer<\/div>\n
Verified Purchase \u00b7 Jeollabuk-do, South Korea<\/div>\n<\/div>\n
\u2605\u2605\u2605\u2605\u2605<\/div>\n<\/div>\n

EP-TNF180 P2 i=80 dual-stage for horizontal single-axis solar tracker slew drive on a 2 MW utility farm in Jeonbuk. The \u00d8240 mm output flange bolts to the tracker arm hub directly. At Fr=14,800 N radial capacity, the gearbox handles full wind-load on 8-metre tracker arms without additional support bearings. IP65 sealing and \u221210\u00b0C minimum temperature have performed through two Korean winters. 68 units installed across the site, zero failures at 22 months. Stainless fastener option was supplied for coastal salt environment.<\/p>\n

EP-TNF180, i=80, P2 \u00b7 2 MW solar tracker \u00b7 68 units, 22 months, zero failures, salt environment<\/div>\n<\/div>\n<\/div>\n
\n

Share your EP-TNF application experience.<\/strong> \u0395\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03ae\u03c3\u03c4\u03b5 \u03bc\u03b5 \u03c4\u03b7\u03bd Korea Ever-Power: sales@planetary-gearboxes.com<\/a><\/p>\n<\/div>\n<\/section>\n

<\/p>\n

<\/section>\n
\n

Specify Your EP-TNF Flange Configuration<\/h2>\n

Provide the output flange bolt pattern, pilot register diameter, motor model, and load profile \u2014 Korea Ever-Power confirms the correct EP-TNF frame, ratio, and grade with dimensional drawing. Korean-language support, same working day.<\/p>\n

Round-flange output expert support \u00b7 Same-day response \u00b7 ISO 9283 compatibility confirmed<\/p>\n

Request Quote \u2014 EP-TNF \u2192
\n<\/a>
\nNeed P0 Grade? \u2192 EP-TEG \u2192
\n<\/a><\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"
\n
\u2605 Same Helical Core as EP-TM \u2014 With a Bolt-Circle Flange Instead of a Shaft<\/div>\n

When the load bolts directly to the gearbox output face \u2014 a robot arm link, CNC rotary table, indexing head hub \u2014 a coupling is not needed. EP-TNF eliminates the coupling by providing a precision round flange (\u00d880\u2013292 mm, ground to \u22640.02 mm runout) that interfaces directly with the load. Same efficiency as EP-TM<\/a> (\u226597% L1), slightly wider P1 backlash (\u22645 arcmin vs \u22643 arcmin) due to the flange bearing geometry.<\/p>\n<\/div>","protected":false},"featured_media":793,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[963],"product_tag":[],"class_list":["post-786","product","type-product","status-publish","has-post-thumbnail","product_cat-planetary-gearbox","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/product\/786","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/comments?post=786"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/media\/793"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/media?parent=786"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/product_brand?post=786"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/product_cat?post=786"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/el\/wp-json\/wp\/v2\/product_tag?post=786"}],"curies":[{"name":"\u03b5\u03c1\u03b3\u03b1\u03c3\u03af\u03b1","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}