{"id":560,"date":"2026-05-27T03:50:41","date_gmt":"2026-05-27T03:50:41","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?post_type=product&p=560"},"modified":"2026-05-27T03:58:59","modified_gmt":"2026-05-27T03:58:59","slug":"ep-bpg-energy-saving-planetary-gearbox","status":"publish","type":"product","link":"https:\/\/planetary-gearboxes.com\/th\/product\/ep-bpg-energy-saving-planetary-gearbox\/","title":{"rendered":"\u0e0a\u0e38\u0e14\u0e40\u0e01\u0e35\u0e22\u0e23\u0e4c\u0e17\u0e14\u0e23\u0e2d\u0e1a\u0e41\u0e1a\u0e1a\u0e14\u0e32\u0e27\u0e40\u0e04\u0e23\u0e32\u0e30\u0e2b\u0e4c\u0e1b\u0e23\u0e30\u0e2b\u0e22\u0e31\u0e14\u0e1e\u0e25\u0e31\u0e07\u0e07\u0e32\u0e19 EP-BPG Series \u2014 \u0e23\u0e30\u0e1a\u0e1a\u0e02\u0e31\u0e1a\u0e40\u0e04\u0e25\u0e37\u0e48\u0e2d\u0e19\u0e21\u0e32\u0e15\u0e23\u0e10\u0e32\u0e19\u0e2a\u0e33\u0e2b\u0e23\u0e31\u0e1a\u0e07\u0e32\u0e19\u0e2d\u0e38\u0e15\u0e2a\u0e32\u0e2b\u0e01\u0e23\u0e23\u0e21 (EP-BPG040 \u0e16\u0e36\u0e07 EP-BPG160)"},"content":{"rendered":"

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EP-BPG Series \u2014 Energy-Saving Planetary Gearbox for General Industrial Drives<\/h2>\n
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\"EP-BPG<\/p>\n

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<6\u20138′<\/div>\n
Backlash (arcmin)<\/div>\n<\/div>\n
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3\u2013100:1<\/div>\n
Ratio Range<\/div>\n<\/div>\n
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40\u2013160mm<\/div>\n
Frame Sizes<\/div>\n<\/div>\n
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Low Drag<\/div>\n
Energy-Saving Design<\/div>\n<\/div>\n<\/div>\n

\n\u2190 Browse All Planetary Gearbox Series
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Before selecting EP-BPG \u2014 read this first:<\/p>\n

EP-BPG is not<\/strong> a precision servo planetary gearbox. Its backlash is <6\u20138 arcmin \u2014 not the \u22643 arcmin P1 grade of the EP-BAB\/BAE\/BAF series. If your application uses a servo motor for closed-loop position control of a machine axis, use the EP-BAB series<\/strong> instead. EP-BPG is designed for general industrial drives \u2014 conveyors, mixers, fans, and similar equipment \u2014 where throughput, low running cost, and simplicity matter more than sub-arcminute positioning accuracy.<\/p>\n<\/div>\n

\u0e40\u0e14\u0e2d\u0e30 EP-BPG energy-saving planetary gearbox<\/strong> is Korea Ever-Power’s compact industrial gear reducer for general-purpose applications where a standard induction motor or variable frequency drive<\/strong> provides the input and the output requirements are defined by speed ratio and shaft torque \u2014 not by angular positioning accuracy. Five frame sizes from EP-BPG040 to EP-BPG160 cover the broad range of industrial motor pairings, with single-stage ratios including 3, 4, 5, 7, 8, and 10 (note: ratios 6 and 9 are not available in this series), and two-stage ratios from 12:1 to 100:1.<\/p>\n

The “energy-saving” designation reflects an internal design philosophy: the gear geometry, tooth surface finish, and lubrication system are optimised to minimise no-load drag torque<\/strong> \u2014 the power consumed by the gearbox itself when running without a mechanical output load. In continuous-duty industrial applications running 16\u201324 hours per day, this no-load drag reduction accumulates into meaningful electricity savings compared to conventional worm gear reducers or older planetary designs where internal friction is not specifically managed.<\/p>\n

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\u26a1 Low Drag Loss<\/div>\n
Optimised for reduced no-load running power \u2014 suits 24 hr continuous duty.<\/div>\n<\/div>\n
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\ud83c\udfed General Industrial<\/div>\n
Standard motor compatible \u2014 induction, VFD, stepper, light-duty servo.<\/div>\n<\/div>\n
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\ud83d\udcb0 Cost-Effective<\/div>\n
Lower unit cost vs precision series \u2014 right specification for non-precision drives.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

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EP-BPG vs EP-BAB \u2014 Choosing the Right Product for Your Application<\/h2>\n

Both EP-BPG and EP-BAB are planetary gear reducers from Korea Ever-Power, but they are engineered for fundamentally different application categories. Choosing the wrong one \u2014 either over-specifying with precision hardware or under-specifying with general industrial hardware \u2014 adds unnecessary cost or creates reliability problems. The table below identifies the decision criteria.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Criterion<\/th>\nEP-BAB (Precision Series)<\/th>\nEP-BPG \u2605 (Energy-Saving Series)<\/th>\n<\/tr>\n<\/thead>\n
Backlash specification<\/td>\nP1: \u22643 arcmin
\nP2: \u22648 arcmin<\/td>\n		BPG040\/060: <8 arcmin
\nBPG080\/120\/160: <6 arcmin<\/td>\n<\/tr>\n
Typical motor type<\/td>\nServo motor (brushless AC\/DC, closed-loop)<\/td>\nInduction motor, VFD drive, stepper motor, light-duty servo<\/td>\n<\/tr>\n
Control objective<\/td>\nClosed-loop angular position control<\/td>\nSpeed and torque control; open-loop or simple closed-loop<\/td>\n<\/tr>\n
Positioning accuracy needed<\/td>\nSub-arcminute to a few arcminutes<\/td>\n6\u20138 arcmin is acceptable; accuracy is not the primary specification<\/td>\n<\/tr>\n
Duty cycle<\/td>\nIntermittent, high-cycle servo positioning<\/td>\nContinuous 16\u201324 hr\/day; energy savings accumulate over time<\/td>\n<\/tr>\n
Max single-stage ratios<\/td>\n3, 4, 5, 6, 7, 8, 9, 10<\/td>\n3, 4, 5, 7, 8, 10 (note: 6 and 9 not available)<\/em><\/td>\n<\/tr>\n
Min two-stage ratio<\/td>\ni=15<\/td>\ni=12 (lower minimum \u2014 useful for low-ratio two-stage requirements)<\/td>\n<\/tr>\n
Unit cost<\/td>\nHigher (precision manufacturing)<\/td>\nLower \u2014 reflects the reduced precision requirement<\/td>\n<\/tr>\n
Typical applications<\/td>\nRobots, CNC, semiconductor equipment, packaging servo axes<\/td>\nConveyors, fans, pumps, mixers, hoists, general automation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\u25b8 Decision rule: <\/span>
\nAsk one question: does your application require the output shaft to stop at a specific angular position that must be accurate to better than 8 arcmin? If yes, use EP-BAB. If your specification is defined by output speed and torque \u2014 not position accuracy \u2014 EP-BPG delivers the performance you need at lower cost and with lower running energy consumption.<\/span><\/div>\n<\/section>\n

\"BPG \"BPG<\/p>\n

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What “Energy-Saving” Means Technically \u2014 and Where It Delivers Value<\/h2>\n
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How Planetary Gear Drag Loss Occurs<\/h3>\n

In any planetary gear reducer, the total power loss has two components: load-dependent loss<\/strong> (gear tooth mesh friction, proportional to transmitted torque) and no-load loss<\/strong> (churning of lubricant, seal drag, and bearing drag, present even when no torque is being transmitted). For an industrial conveyor running continuously at partial load \u2014 typical of most factory floor applications \u2014 the no-load loss can represent 30\u201360% of the total gearbox power consumption.<\/p>\n

EP-BPG’s energy-saving design addresses no-load loss specifically: optimised lubricant fill level avoids excess churning, the gear tooth surface finish reduces oil adhesion drag at mesh points, and the bearing selection minimises rolling drag under no-load conditions. The result is a planetary gear reducer that consumes less electricity than a conventional design at the same rating \u2014 without changing the output speed, torque, or gear ratio.<\/p>\n<\/div>\n

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Where the Savings Accumulate<\/h3>\n
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24-Hour Continuous Conveyor Drives<\/strong><\/p>\n

A conveyor running 8,000 hours per year at partial load benefits most. Even a 1\u20132% reduction in no-load drag torque accumulates into hundreds of kWh annually per gearbox \u2014 measurable in an electricity bill for a facility with dozens of conveyor drives.<\/p>\n<\/div>\n

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Fan and Pump Drives at Partial Speed<\/strong><\/p>\n

When a VFD reduces fan or pump speed to 60\u201380% of rated, the motor operates at low torque but the gearbox still churns lubricant at the input speed. Reduced drag losses at partial load conditions directly improve system efficiency at the operating points that dominate actual annual energy consumption.<\/p>\n<\/div>\n

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Multi-Gearbox Installations<\/strong><\/p>\n

A factory operating 20\u201350 EP-BPG gear reducers on continuous conveyor, mixer, and hoist drives multiplies the per-unit energy saving by the number of installed units \u2014 creating a facility-level efficiency improvement that justifies the product specification over conventional worm gear drives.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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Efficiency Comparison \u2014 EP-BPG vs Common Alternatives<\/h3>\n
\n\n\n\n\n\n\n\n\n\n
Drive Type<\/th>\nEP-BPG Planetary \u2605<\/th>\nWorm Gear Reducer<\/th>\nHelical Gear Reducer<\/th>\n<\/tr>\n<\/thead>\n
Full-load efficiency<\/td>\n\u226595% (single-stage)<\/td>\n40\u201375% (ratio-dependent)<\/td>\n96\u201398%<\/td>\n<\/tr>\n
No-load drag (relative)<\/td>\nLow (energy-saving design)<\/td>\nHigh (worm\/wheel sliding contact)<\/td>\nModerate<\/td>\n<\/tr>\n
Footprint vs output torque<\/td>\nCompact \u2014 planetary gear gives high torque density<\/td>\nCompact at low ratios<\/td>\nLarger for equivalent torque<\/td>\n<\/tr>\n
Heat generation<\/td>\nLow \u2014 minimal cooling required<\/td>\nHigh \u2014 often requires forced cooling fan<\/td>\nLow to moderate<\/td>\n<\/tr>\n
Maintenance<\/td>\nSealed \u2014 no oil change required in normal service<\/td>\nOil changes every 2,000\u20135,000 hr<\/td>\nSealed or periodic oil change<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Note: worm gear efficiency data reflects industry-standard AGMA-class worm reducers at ratios \u226520:1. At lower ratios the efficiency gap narrows. Helical gear efficiency data is typical for single-stage helical.<\/p>\n<\/section>\n

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EP-BPG040 to EP-BPG160 \u2014 Complete Specifications<\/h2>\n

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\n\n\n\n\n\n\n\n\n\n\n\n\n
Common Specifications \u2014 All EP-BPG Frames<\/th>\n<\/tr>\n<\/thead>\n
Product Type<\/td>\nEnergy-saving planetary gearbox \u2014 general industrial drive<\/td>\n<\/tr>\n
Backlash \u2014 BPG040, BPG060<\/td>\nSingle-stage <8 arcmin \u00b7 Two-stage <12 arcmin<\/td>\n<\/tr>\n
Backlash \u2014 BPG080, BPG120, BPG160<\/td>\nSingle-stage <6 arcmin \u00b7 Two-stage <8 arcmin<\/td>\n<\/tr>\n
Single-Stage Ratios<\/td>\n3, 4, 5, 7, 8, 10 (note: ratios 6 and 9 are not available)<\/strong><\/td>\n<\/tr>\n
Two-Stage Ratios<\/td>\n12, 15, 20, 25, 30, 35, 40, 50, 70, 100 (includes i=12 \u2014 lowest in the EP series)<\/em><\/td>\n<\/tr>\n
\u0e2d\u0e38\u0e13\u0e2b\u0e20\u0e39\u0e21\u0e34\u0e43\u0e19\u0e01\u0e32\u0e23\u0e17\u0e33\u0e07\u0e32\u0e19<\/td>\n0 \u00b0C to +40 \u00b0C<\/td>\n<\/tr>\n
\u0e01\u0e32\u0e23\u0e2b\u0e25\u0e48\u0e2d\u0e25\u0e37\u0e48\u0e19<\/td>\nSealed \u2014 no field oil change required in normal operating conditions<\/td>\n<\/tr>\n
Noise (3,000 rpm, no-load, 1 m)<\/td>\n<65 dB(A)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Maximum Rated Input Speed (RPM) by Frame<\/h3>\n
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\u0e40\u0e1f\u0e23\u0e21<\/th>\nEP-BPG040<\/th>\nEP-BPG060<\/th>\nEP-BPG080<\/th>\nEP-BPG120<\/th>\nEP-BPG160<\/th>\n<\/tr>\n<\/thead>\n
Max RPM (rated)<\/td>\n4,500<\/td>\n4,000<\/td>\n3,600<\/td>\n3,000<\/td>\n2,500<\/td>\n<\/tr>\n
Typical motor pairing<\/td>\n2-pole induction up to 4,500 rpm<\/td>\nStandard 4-pole induction \/ stepper<\/td>\nStandard 4-pole induction 3,600 rpm<\/td>\n4-pole induction \/ large VFD<\/td>\nLarge induction \/ low-speed input<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Permissible Output Shaft Radial Force (N)<\/h3>\n
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\u0e40\u0e1f\u0e23\u0e21<\/th>\nBPG040<\/th>\nBPG060<\/th>\nBPG080<\/th>\nBPG120<\/th>\nBPG160<\/th>\n<\/tr>\n<\/thead>\n
Radial Force Fr<\/sub> (\u0e19)<\/td>\n100<\/td>\n300<\/td>\n500<\/td>\n1,175<\/td>\n2,080<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Motor Mounting Thread Specification<\/h3>\n
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\u0e40\u0e1f\u0e23\u0e21<\/th>\nBPG040<\/th>\nBPG060<\/th>\nBPG080<\/th>\nBPG120<\/th>\nBPG160<\/th>\n<\/tr>\n<\/thead>\n
Thread \u00d7 Depth<\/td>\nM4\u00d70.7P
\n\u00d710mm<\/td>\n		M5\u00d70.8P
\n\u00d710mm<\/td>\n		M6\u00d71P
\n\u00d712mm<\/td>\n		M10\u00d71.5P
\n\u00d720mm<\/td>\n		M12\u00d71.75P
\n\u00d722mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\u25b8 Torque data note: <\/span>
\nFull rated output torque tables for all ratios and frames are available in the EP-BPG selection datasheet. Contact Korea Ever-Power’s Korean sales team with your required ratio and motor power to receive a specific torque confirmation and selection recommendation. Minimum starting torque values for EP-BPG040\/060\/080 begin at approximately 4 N\u00b7m, 6 N\u00b7m, and 9 N\u00b7m respectively.<\/span><\/div>\n<\/section>\n

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EP-BPG and EP-BPGA \u2014 Understanding the Two Installation Variants<\/h2>\n

EP-BPG and EP-BPGA share the same internal gear train, gear ratios, backlash specification, efficiency, and rated torque. The difference is exclusively in the motor-side mounting interface<\/strong> \u2014 the input flange geometry and adapter plate arrangement.<\/p>\n

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EP-BPG \u2014 Standard Input Flange<\/h3>\n