{"id":664,"date":"2026-05-29T05:26:17","date_gmt":"2026-05-29T05:26:17","guid":{"rendered":"https:\/\/planetary-gearboxes.com\/?p=664"},"modified":"2026-05-29T05:28:17","modified_gmt":"2026-05-29T05:28:17","slug":"planetary-gearbox-conveyor-drive-selection-guide","status":"publish","type":"post","link":"https:\/\/planetary-gearboxes.com\/es\/planetary-gearbox-conveyor-drive-selection-guide\/","title":{"rendered":"Planetary Gearbox Conveyor Drive Selection"},"content":{"rendered":"

<\/p>\n
\"planetary<\/p>\n
\n
Engineering Selection Guide \u00b7 Belt \u00b7 Chain \u00b7 Roller \u00b7 Screw \u00b7 Torque Calculation<\/div>\n

Planetary Gearbox Conveyor Drive Selection \u2014
\nBelt, Chain, Roller and Screw Conveyor Guide<\/h1>\n

Every planetary gearbox conveyor drive<\/strong> failure in Korean industry shares a root cause: the gearbox was selected from the catalogue at rated running torque and the startup service factor<\/strong> was ignored \u2014 producing a unit that runs fine when warm but stalls or overloads on cold-start or under heavy material surge. This guide covers the complete torque calculation chain for every Korean conveyor type, from flat belt through inclined screw elevator.<\/p>\n

View EP-BPG Energy-Saving Series \u2192
\n<\/a><\/p>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Four Conveyor Types \u2014 Four Different Gearbox Priority Specifications<\/h2>\n
\n
\n

Conveyors represent the single largest application category for the planetary gearbox conveyor drive in Korean industry in Korean industry \u2014 food processing, logistics, steel manufacturing, automotive assembly, and chemical processing all depend on conveyors running continuously in three shifts. Despite this volume, conveyor gearbox selection is frequently under-engineered: the torque is estimated rather than calculated, the startup condition is ignored, and the operating environment is treated as standard when it is actually hostile.<\/p>\n

The four major conveyor types in Korean industry each have a distinct dominant specification that governs gearbox selection. Applying the wrong priority \u2014 backlash for a conveyor that needs startup torque, or rated torque for a screw that needs self-locking \u2014 produces predictable failures:<\/p>\n

\n
\n
\u2460 Belt conveyor \u2014 Efficiency and startup torque<\/div>\n

Runs continuously, often on three shifts. Eficiencia<\/strong> determines energy cost over the machine life. Startup service factor<\/strong> determines whether the gearbox survives cold-start with material on the belt. Backlash is irrelevant \u2014 belt conveyors are open-loop speed drives.<\/p>\n<\/div>\n

\n
\u2461 Chain and slat conveyor \u2014 Impact load and service life<\/div>\n

Chain engagement produces repetitive tooth-impact loading at the gearbox output shaft. Dynamic service factor<\/strong> (typically 1.5\u20132.5\u00d7) applied to the running torque to account for chain engagement impact. Stainless chain in Korean food processing adds corrosion consideration.<\/p>\n<\/div>\n

\n
\u2462 Roller conveyor \u2014 Low torque, compact mount<\/div>\n

Individual rollers driven by small gearbox units at each zone. Compact body and right-angle output<\/strong> are primary constraints \u2014 the gearbox must fit within the roller frame cross-section and the output shaft must drive the roller from the end.<\/p>\n<\/div>\n

\n
\u2463 Screw \/ auger conveyor \u2014 Self-locking and high ratio<\/div>\n

Inclined and vertical screw conveyors must hold position when power is removed \u2014 the material column load creates back-drive torque. Self-locking or auxiliary brake<\/strong> is a safety requirement for vertical or high-angle installations.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\n
\n

Conveyor Type \u2192 Priority Spec<\/p>\n

Belt conveyor \u2192 Efficiency + startup SF
\nChain conveyor \u2192 Dynamic SF (1.5\u20132.5\u00d7)
\nRoller zone \u2192 Compact R\/A output
\nScrew\/vertical \u2192 Self-lock or brake
\nIncline (>15\u00b0) \u2192 Startup SF \u00d7 sin(\u03b8)<\/div>\n
The startup service factor is the most commonly omitted step in Korean conveyor gearbox selection \u2014 and the most common cause of early gearbox failures.<\/div>\n<\/div>\n
\n
\n
\u226597%<\/div>\n
Planetary efficiency
\nvs 40\u201385% worm<\/div>\n<\/div>\n
\n
2,5\u00d7<\/div>\n
Max startup service
\nfactor for heavy belt<\/div>\n<\/div>\n
\n
i=100<\/div>\n
Max 2-stage ratio
\nfor slow conveyors<\/div>\n<\/div>\n
\n
\u221210\u00b0C<\/div>\n
EP planetary min
\nKorean outdoor<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Belt Conveyor Drive Torque Calculation \u2014 The Complete Engineering Chain<\/h2>\n
\n
\n

The full torque calculation for a belt conveyor drive gearbox requires four components: the effective belt pull to move the loaded material, the belt tension losses, the incline gravity component, and the startup factor. Omitting any one of these produces an undersized gearbox.<\/p>\n

\n

BELT CONVEYOR DRIVE TORQUE \u2014 STEP-BY-STEP<\/p>\n

Step 1 \u2014 Effective belt pull (N):
\nF_eff = \u03bc \u00d7 (m_material + m_belt) \u00d7 g \u00d7 cos(\u03b8)
\n+ (m_material + m_belt) \u00d7 g \u00d7 sin(\u03b8)
\n\u03bc = belt friction coefficient (0.03\u20130.05 roller)
\n\u03b8 = conveyor incline angleStep 2 \u2014 Drive pulley torque (N\u00b7m):
\nT_pulley = F_eff \u00d7 r_pulleyStep 3 \u2014 Gearbox output torque (N\u00b7m):
\nT_gearbox = T_pulley \/ \u03b7_transmission
\n\u03b7 = drive pulley efficiency (~0.95\u20130.97)Step 4 \u2014 Apply service factor:
\nT_rated = T_gearbox \u00d7 SF
\nSF = 1.25 (smooth, uniform load)
\nSF = 1.75 (moderate shock, variable load)
\nSF = 2.50 (heavy start, cold morning)<\/p>\n<\/div>\n<\/div>\n

Worked example \u2014 Korean steel mill slab conveyor:<\/strong> Material mass 8,000 kg on belt, belt mass 600 kg, incline \u03b8=5\u00b0, pulley radius r=0.25 m, belt friction \u03bc=0.04, drive efficiency \u03b7=0.96.<\/p>\n

F_friction = 0.04 \u00d7 8,600 \u00d7 9.81 \u00d7 cos(5\u00b0) = 3,357 N
\nF_gravity = 8,600 \u00d7 9.81 \u00d7 sin(5\u00b0) = 7,356 N
\nF_eff = 3,357 + 7,356 = 10,713 N
\nT_pulley = 10,713 \u00d7 0.25 = 2,678 N\u00b7m
\nT_gearbox = 2,678 \/ 0.96 = 2,790 N\u00b7m
\nT_rated (SF=2.0) = 2,790 \u00d7 2.0 = 5,580 N\u00b7m<\/strong>
\n\u2192 EP-AH New Line 355 frame (to 9,585 N\u00b7m) \u2713<\/div>\n<\/div>\n
\n

Service Factor Selection \u2014 Korean Conveyor Applications<\/p>\n

\n\n\n\n\n\n\n\n\n\n
Conveyor Condition<\/th>\nSF<\/th>\nExample<\/th>\n<\/tr>\n<\/thead>\n
Smooth, uniform, pre-running material<\/td>\n1.25<\/td>\nLight parts conveyor, empty start always<\/td>\n<\/tr>\n
Moderate load variation, normal start<\/td>\n1.5<\/td>\nKorean food packaging in-feed conveyor<\/td>\n<\/tr>\n
Variable load, possible surge start<\/td>\n1.75<\/td>\nAuto parts assembly line main belt<\/td>\n<\/tr>\n
Heavy load, full-load start, inclined<\/td>\n2.0<\/td>\nKorean steel mill slab conveyor<\/td>\n<\/tr>\n
Cold start (outdoor winter), full load<\/td>\n2.5<\/td>\nOutdoor Korean port bulk cargo belt<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\n
Why cold-start SF=2.5 on Korean outdoor belts:<\/div>\n

At \u22125 to \u221210\u00b0C (Korean winter outdoor), belt rubber stiffens increasing bending resistance by 30\u201350%, material frozen to belt adds 40\u201380% static friction torque vs warm condition, and gearbox grease viscosity at low temperature increases churning losses. Combined effect: cold-start torque can reach 2\u20133\u00d7 the steady-state running torque. EP-AB rated to \u221210\u00b0C minimum grease \u2014 operating temperature confirmed, but torque capacity must cover this cold-start peak.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

The Startup Service Factor \u2014 Why Running Torque Is Never the Selection Basis<\/h2>\n
\n
\n

The most common Korean conveyor gearbox failure mode is not wear or fatigue under normal running \u2014 it is shear failure or tooth overload on the first start of the day, or after a power outage that leaves the belt fully loaded. Engineers who select gearboxes based on steady-state running torque are selecting for the easiest operating condition, not the hardest.<\/p>\n

The startup torque on a loaded conveyor differs from the running torque in three ways. First, static belt tension is higher than dynamic tension \u2014 the belt and material must be accelerated from rest against the belt’s static coefficient of friction, which is 20\u201350% higher than its kinetic coefficient. Second, inertia of the loaded belt, material, and rotating pulleys must be accelerated from zero speed. Third, on cold Korean mornings, material adhesion and belt stiffness further increase the peak breakaway torque.<\/p>\n

\n

STARTUP TORQUE COMPONENTS \u2014 LOADED BELT<\/p>\n

T_startup = T_steady \u00d7 SF_load
\n+ T_accel
\n+ T_cold_penalty (winter)T_accel = (J_total \/ i\u00b2) \u00d7 \u03b1 \u00d7 i
\nJ_total = J_material + J_belt + J_pulleys
\n\u03b1 = angular acceleration (rad\/s\u00b2)Example: 500 kg\u00b7m\u00b2 total system inertia,
\ni=20, \u03b1=0.5 rad\/s\u00b2 at output:
\nT_accel = (500\/400) \u00d7 0.5 \u00d7 20 = 12.5 N\u00b7m<\/span>
\n(small vs friction torque for heavy conveyors)In practice: use SF=1.5\u20132.5 encompassing
\nall startup components as engineering margin.<\/p>\n<\/div>\n<\/div>\n

The practical resolution: specify the gearbox on T_rated = T_running \u00d7 SF<\/strong> using the appropriate service factor from the table above. Do not attempt to calculate the exact startup torque \u2014 the service factor already encapsulates the typical startup peaks for each conveyor category. Only for unusual applications (very long belts, frozen material handling, high-frequency starts) should a detailed startup torque calculation replace the service factor approach.<\/p>\n

For Korean conveyor installations replacing existing worm gear reducers with the EP-BPG energy-saving planetary series<\/a>: the SF selection should account for the same startup conditions as the original worm unit. The planetary’s higher efficiency means a smaller motor can deliver the same output torque \u2014 but the motor must still be sized for the startup peak, not just the running power at \u226597% efficiency.<\/p>\n<\/div>\n

\"high
\n<\/p>\n
\n
Top 3 Korean conveyor gearbox failure modes<\/div>\n
\n
\n

1.<\/span><\/p>\n

Tooth fracture on first cold-start<\/strong> \u2014 selected at running torque, SF=1.0 applied. Gearbox grossly undersized for startup peak. Fix: apply SF\u22651.75 minimum.<\/div>\n<\/div>\n
\n

2.<\/span><\/p>\n

Bearing overload from shaft overhang<\/strong> \u2014 pulley mounted far from gearbox face, radial load exceeds bearing capacity. Fix: use EP-AF high-rigidity shaft or add outboard bearing.<\/div>\n<\/div>\n
\n

3.<\/span><\/p>\n

Overheating replacing worm reducer<\/strong> \u2014 worm gearbox replaced with EP-BPG but motor not downsized. Over-torque at same power due to higher efficiency. Fix: recalculate motor for new \u03b7.<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Chain and Slat Conveyor Drives \u2014 Dynamic Impact Factor and Food-Grade Requirements<\/h2>\n
\n
\n

Chain conveyors \u2014 including slat conveyors, drag conveyors, and plate chain systems \u2014 transmit drive forces through discrete chain engagement events. Each time a chain link engages the drive sprocket, there is a small but measurable velocity change in the driven system \u2014 a periodic impulse load at the drive shaft. At high chain speeds, these impulses merge into a nearly continuous load. At low chain speeds (below 0.5 m\/s, common in heavy-load Korean steel and automotive conveyors), the impulses are distinct mechanical shocks at the gearbox output shaft.<\/p>\n

The dynamic service factor for chain conveyors (KA in DIN standards) ranges from 1.25 for smooth uniform-pitch chain on smooth-running equipment to 2.5 for highly irregular chain engagement with shock loading. In Korean food processing, stainless steel drag chain running at 0.3 m\/s through a chilled protein processing tunnel requires KA=1.75 minimum \u2014 the chain stiffness at cold temperature increases the impulse magnitude, and the food-safe lubricant-free chain generates higher friction variation than a lubricated industrial chain.<\/p>\n

Korean stainless chain in food processing: <\/strong>
\nKorean KFDA food processing facilities require stainless steel chain that cannot be lubricated with standard mineral oil \u2014 food-safe lubricants have much lower load-carrying capacity and wash off faster during CIP. The effective dynamic factor for dry-running stainless chain in a food CIP zone is KA=2.0\u20132.5. This means the gearbox rated torque must be 2.0\u20132.5\u00d7 the calculated steady running torque. Under-specification by one frame size is the single most common selection error on Korean food chain conveyors.<\/span><\/div>\n<\/div>\n
\n
\n
Chain Type \u2192 Dynamic Service Factor (KA)<\/div>\n
\n
\n
Lubricated roller chain, uniform<\/span>1.25<\/span><\/div>\n
Auto parts assembly conveyor, smooth<\/div>\n<\/div>\n
\n
Lubricated, moderate variation<\/span>1.5<\/span><\/div>\n
General Korean factory chain conveyor<\/div>\n<\/div>\n
\n
Dry-run SS chain, food CIP<\/span>2.0<\/span><\/div>\n
Korean food wet zone stainless chain<\/div>\n<\/div>\n
\n
Heavy shock, irregular load<\/span>2.5<\/span><\/div>\n
Steel mill scale conveyor, drag chain<\/div>\n<\/div>\n<\/div>\n

T_gearbox_rated = T_running \u00d7 KA. Always verify the selected gearbox peak torque rating (typically 2\u20133\u00d7 rated) also exceeds the worst-case startup torque.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Screw and Auger Conveyor Drives \u2014 Self-Locking, High Ratio, and Vertical Safety<\/h2>\n
\n
\n

Screw conveyors \u2014 horizontal augers for grain\/powder\/pellet transfer, vertical screw elevators, and inclined mixing augers \u2014 present a unique combination of requirements for the drive gearbox. Very low output speed (typically 20\u2013150 rpm), high continuous torque from material shear resistance, and for inclined or vertical installations, the need to hold position when the motor is de-energised.<\/p>\n

The position-holding requirement:<\/strong> When a vertical screw elevator stops, the material column above the screw applies a gravitational torque that attempts to back-drive the screw \u2014 rotating it in reverse and allowing material to slide back down the tube. For a planetary gearbox, this back-drive torque is transmitted directly to the motor shaft through the gearbox (which is back-drivable). If the motor servo brake or VFD holding torque is insufficient, or if a power failure disables the motor, the screw will rotate backwards.<\/p>\n

Korean food processing and grain handling facilities address this through one of two methods: a downstream self-locking stage (worm gear) that physically prevents back-drive regardless of motor state, or an electromagnetic spring-set brake on the motor shaft that engages on power-off (fail-safe: spring force holds the brake closed, power is required to release it). For vertical screw elevator gravity load holding<\/a> where a power failure would allow material to uncontrollably slide back and create a hazard, the self-locking worm stage is the preferred safety solution \u2014 it provides passive holding that requires no electrical power to maintain.<\/p>\n

Para horizontal screw conveyors<\/strong> where position holding is not required, the planetary gearbox provides advantages over the worm reducer that has historically dominated this application: \u226597% efficiency versus 55\u201370% for the worm at typical 20:1\u201360:1 single-stage ratios, sealed maintenance-free grease versus worm oil bath requiring periodic changes, and lower motor sizing. The Serie EP-AH New Line<\/a> covers the high-torque, moderate-ratio requirements of heavy Korean grain and mineral screw conveyors up to 9,585 N\u00b7m.<\/p>\n<\/div>\n

\n
\n

Screw Conveyor \u2014 Drive Configuration by Angle<\/p>\n

\u03b8 = 0\u00b0 (horizontal):
\nNo back-drive risk
\nPlanetary only \u2713 (efficiency wins)
\nSeries: EP-BPG \/ EP-AH\u03b8 = 5\u201315\u00b0 (slight incline):
\nMinimal back-drive on shutdown
\nMotor brake adequate \u2713
\nPlanetary + motor brake\u03b8 = 15\u201345\u00b0 (inclined):
\nSignificant gravity back-drive
\nStrong motor brake required
\nOr planetary + worm stage\u03b8 = 90\u00b0 (vertical elevator):
\nMaximum gravity back-drive \u26a0
\nFail-safe: spring-set brake
\nor worm self-lock stage<\/p>\n<\/div>\n
\n
Horizontal screw \u2014 energy saving case:<\/div>\n

A Korean grain terminal replaced 12 worm reducers on horizontal grain transfer augers with EP-BPG planetary units. Worm efficiency 62% at i=40:1; EP-BPG \u226597%. Annual energy saving per auger: 0.35 kW \u00d7 6,000h \u00d7 \u20a9120\/kWh = \u20a9252,000. Twelve augers: \u20a93,024,000 saved per year. Full payback on upgrade cost: 8 months.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Roller Conveyor Zone Drives \u2014 Compact Right-Angle Output in Tight Frame Space<\/h2>\n
\n
\n

Motorised roller conveyors for logistics, e-commerce fulfilment, and automotive parts sortation use individually powered roller zones \u2014 each zone driven by its own small gearbox unit whose output shaft couples directly to the roller end. The physical envelope constraint is severe: the gearbox must fit between the roller and the conveyor frame side rail, typically within 60\u2013100 mm of total axial space, with the output shaft coaxial to the roller centreline.<\/p>\n

Korean logistics hub roller conveyors typically run at 1\u20133 m\/s with 20\u2013100 kg package loads per zone. The required output torque per zone is modest \u2014 typically 5\u201325 N\u00b7m \u2014 and the reduction ratio is in the range i=10\u201350 from a 3,000 rpm motor to achieve the target roller surface speed. Backlash grade is irrelevant: these zones are speed-controlled open-loop drives.<\/p>\n

For the compact axial space requirement, the EP-ABR right-angle series<\/a> places the motor perpendicular to the roller axis \u2014 the motor extends sideways rather than axially, freeing the axial space constraint. This is the dominant installation layout for Korean motorised roller conveyors in fulfilment centres. The EP-ABR042 and EP-ABR060 frames (42 mm and 60 mm body diameter) fit within standard conveyor frame roller-to-frame clearances. P2 grade is the standard specification \u2014 backlash is irrelevant for speed-only zone control.<\/p>\n<\/div>\n

\n

\"compact<\/p>\n

\n
Korean logistics hub case \u2014 450 zone drives:<\/div>\n

EP-ABR060 P2 i=20 on 450 roller zones in a Korean e-commerce fulfilment centre. Right-angle layout: motor extends sideways into the frame space without axial interference with adjacent rollers. Installation by conveyor OEM in-house: no Korea Ever-Power field service required \u2014 standard installation on conveyor manufacturer’s drawing. Delivered 24 months ago, 0 gearbox failures.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Variable-Frequency Drive Integration \u2014 When VFD Changes the Gear Ratio Selection<\/h2>\n
\n
\n

Korean conveyor manufacturers increasingly specify variable-frequency drives (VFDs) on belt conveyor systems to allow soft-start (reducing the startup torque peak) and variable speed operation (matching conveyor speed to upstream production rate). VFD integration changes the gear ratio selection logic compared to direct-on-line starts.<\/p>\n

How VFD affects service factor selection:<\/strong> A VFD provides controlled acceleration \u2014 instead of a direct-on-line motor applying full torque instantly, the VFD ramps the motor up over a programmable acceleration time (typically 3\u201310 seconds for conveyors). This controlled ramp dramatically reduces the peak startup torque: a conveyor that requires SF=2.0 for direct-on-line start typically requires only SF=1.25\u20131.5 with VFD soft-start. The gearbox can therefore be specified at a smaller size.<\/p>\n

How VFD changes ratio selection:<\/strong> Without a VFD, the gearbox ratio must be selected to produce the target belt speed at the motor’s fixed rated speed (typically 1,450 or 2,900 rpm). With a VFD, the motor speed is variable \u2014 the VFD can run the motor at 50%\u2013120% of rated speed. This flexibility means the gearbox ratio can be selected for the mid-speed operating point<\/em> rather than the maximum speed, and the VFD trims to the required speed. The practical benefit is that a standard catalogue ratio (e.g. i=25) can be used for an application that would otherwise require a non-standard ratio (e.g. i=22.5) without a VFD.<\/p>\n

VFD conveyor with EP-BPG \u2014 the Korean standard: <\/strong>
\nKorea Ever-Power EP-BPG energy-saving series is the standard recommendation for VFD-driven Korean belt conveyors replacing worm reducers. The VFD soft-start allows SF=1.5 rather than SF=2.5 for cold-start, enabling one frame size smaller gearbox. Combined with the BPG’s \u226597% efficiency advantage over the replaced worm, the total system (motor + VFD + gearbox) typically delivers 25\u201335% energy reduction versus a direct-on-line worm reducer system.<\/span><\/div>\n<\/div>\n
\n
\n

VFD Impact on Gearbox Selection<\/p>\n

Direct-on-line (DOL) start:
\nSF = 2.0\u20132.5 (cold, heavy belt)
\nT_rated = T_run \u00d7 2.5
\n\u2192 Select larger frame
\nVFD soft-start (10s ramp):
\nSF = 1.25\u20131.5 (controlled accel)
\nT_rated = T_run \u00d7 1.5
\n\u2192 Select one frame smaller \u2713
\nVFD ratio trim benefit:
\nRequired ratio = 22.7:1
\nDOL: need custom ratio \u2190custom
\nVFD: use i=25, run at 90.8%
\nof rated speed \u2192 standard unit \u2713<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Korea Ever-Power Conveyor Drive Selection \u2014 Quick Reference Table<\/h2>\n

Starting point for Korean conveyor gearbox selection. Always confirm with the full torque calculation chain \u2014 running torque \u00d7 service factor \u2014 before finalising frame size.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n
Conveyor Type<\/th>\nTypical SF<\/th>\nReacci\u00f3n<\/th>\nSerie Ever-Power de Corea<\/th>\nKey Reason<\/th>\n<\/tr>\n<\/thead>\n
Belt \u2014 light \/ food (worm replacement)<\/td>\n1.5<\/td>\nNo grade<\/td>\nEP-BPG<\/a><\/td>\n\u226597% efficiency; IEC-flange worm drop-in replacement<\/td>\n<\/tr>\n
Belt \u2014 heavy \/ inclined (steel, port)<\/td>\n2,0\u20132,5<\/td>\nNo grade<\/td>\nEP-AH Nueva L\u00ednea<\/a><\/td>\nUp to 9,585 N\u00b7m; rated \u221210\u00b0C for Korean outdoor winter<\/td>\n<\/tr>\n
Chain \u2014 food SS \/ CIP zone<\/td>\n2.0<\/td>\nNo grade<\/td>\nEP-AB<\/a> + IP65 (AER IP67 if wet zone)<\/td>\nKA=2.0 dry SS chain; IP67 if in CIP flood zone<\/td>\n<\/tr>\n
Roller zone drive \u2014 logistics \/ e-comm<\/td>\n1.5<\/td>\nP2<\/td>\nEP-ABR 042\/060<\/a><\/td>\nR\/A places motor sideways \u2014 fits roller frame clearance<\/td>\n<\/tr>\n
Screw \u2014 horizontal grain \/ powder<\/td>\n1,5\u20132,0<\/td>\nNo grade<\/td>\nEP-BPG<\/a> \/ EP-AH<\/td>\nHorizontal \u2014 no back-drive risk; efficiency beats worm<\/td>\n<\/tr>\n
Screw \u2014 vertical elevator<\/td>\n2.0<\/td>\nNo grade<\/td>\nEP-AH + spring-set brake OR + worm stage<\/td>\nBack-drive safety mandatory \u2014 motor brake or self-lock worm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n

\"Tipos<\/p>\n

\n

Frequently Asked Questions \u2014 Planetary Gearbox for Conveyor Drives<\/h2>\n
\n
\n

Q<\/span>
\nOur existing conveyor uses a worm reducer rated at 200 N\u00b7m. We want to replace it with a planetary. What size EP-BPG do we order?<\/h3>\n

Do not order a 200 N\u00b7m planetary unit directly. The worm reducer was likely selected at rated torque without a service factor \u2014 or was oversized precisely because the service factor was unknown. First, calculate the actual running torque from the conveyor parameters: belt weight, material load, belt speed, pulley radius, and incline. Then apply the appropriate service factor (typically 1.5\u20132.0 for food belt conveyors). If the calculated T_rated = running torque \u00d7 SF is, for example, 280 N\u00b7m, then select an EP-BPG frame covering \u2265280 N\u00b7m. Korea Ever-Power’s application team can calculate this from your conveyor specifications and confirm the correct BPG frame size, including checking that the output shaft and flange dimensions match the existing worm reducer mounting.<\/p>\n<\/div>\n

\n

Q<\/span>
\nMy Korean outdoor belt conveyor is used at a port facility. What are the specific concerns for winter operation?<\/h3>\n

Korean port facilities in Incheon, Busan, and Pohang experience winter ambient temperatures of \u22125 to \u221212\u00b0C. Three concerns apply: (1) Grease viscosity \u2014 EP planetary sealed grease is rated to \u221210\u00b0C minimum operating temperature, covering most Korean port locations. Verify your minimum ambient against this limit; if your site reaches \u221212\u00b0C, discuss a low-temperature grease option with Korea Ever-Power. (2) Startup torque \u2014 as discussed, cold-start SF=2.5 for loaded outdoor belts is the conservative specification for Korean winter conditions. (3) Belt and material stiffening \u2014 the gearbox torque capacity must cover the elevated starting torque from cold belt rubber and frozen material adhesion, not just the summer running condition. Select gearbox frame at T_rated = T_running_warm \u00d7 2.5 for robust Korean outdoor port specification.<\/p>\n<\/div>\n

\n

Q<\/span>
\nCan a planetary gearbox replace a worm reducer on a food facility vertical screw elevator?<\/h3>\n

Only if position holding on power-off is addressed separately. A planetary gearbox delivers better efficiency and longer service life than the worm reducer, but it cannot self-lock \u2014 the material column in a vertical screw elevator will back-drive a planetary gearbox when the motor is off. The replacement configuration requires either: (a) a spring-set electromagnetic brake on the servo or induction motor \u2014 this is fail-safe (brake engages on power loss) and allows the planetary gearbox to handle the running drive; or (b) retaining a worm stage as the final stage downstream of the planetary \u2014 the planetary handles the speed reduction and efficiency, and the worm stage provides the self-lock. Option (b) is used for very tall elevators where the back-drive torque is large and a reliable brake with sufficient torque is impractical.<\/p>\n<\/div>\n

\n

Q<\/span>
\nHow does the pulley overhang distance affect gearbox bearing selection for belt conveyor head drives?<\/h3>\n

Belt conveyor head drums are typically mounted with a shaft projecting from the gearbox output and the pulley located some distance from the gearbox face. The belt tension creates a radial force at the pulley that acts as a bending moment on the gearbox output shaft \u2014 the magnitude of this bending moment increases linearly with the distance from the gearbox face to the pulley centre (the overhang distance). Korea Ever-Power EP series gearbox specifications include a permissible radial force at a reference overhang distance from the shaft face. For installations where the pulley is mounted further from the gearbox than this reference, the permissible radial force must be de-rated \u2014 or the EP-AF high-rigidity shaft series must be substituted, whose enlarged shaft diameter provides significantly higher bending stiffness and bearing load capacity at the increased overhang. Always confirm the actual overhang distance and belt tension when specifying a head drum drive gearbox \u2014 these two parameters determine whether a standard shaft series is adequate or high-rigidity shaft is required.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n

Calculate Your Conveyor Gearbox Torque with Korea Ever-Power<\/h2>\n

Korea Ever-Power’s application team performs the complete torque calculation from your conveyor parameters \u2014 material weight, belt speed, incline angle, chain type, and starting conditions \u2014 and confirms the EP series, frame size, and service factor in Korean, same working day.<\/p>\n

EP-BPG Energy-Saving (Worm Replacement) \u2192
\n<\/a>
\nEP-AH Heavy-Duty (Belt \/ Screw) \u2192
\n<\/a><\/div>\n<\/section>\n

Editor: Cxm
\n<\/main><\/p>","protected":false},"excerpt":{"rendered":"

Engineering Selection Guide \u00b7 Belt \u00b7 Chain \u00b7 Roller \u00b7 Screw \u00b7 Torque Calculation Planetary Gearbox Conveyor Drive Selection \u2014 Belt, Chain, Roller and Screw Conveyor Guide Every planetary gearbox conveyor drive failure in Korean industry shares a root cause: the gearbox was selected from the catalogue at rated running torque and the startup service […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[965],"tags":[],"class_list":["post-664","post","type-post","status-publish","format-standard","hentry","category-application-and-technical-guid"],"_links":{"self":[{"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/posts\/664","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/comments?post=664"}],"version-history":[{"count":4,"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/posts\/664\/revisions"}],"predecessor-version":[{"id":668,"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/posts\/664\/revisions\/668"}],"wp:attachment":[{"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/media?parent=664"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/categories?post=664"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/planetary-gearboxes.com\/es\/wp-json\/wp\/v2\/tags?post=664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}