Audible noise is evidence to investigate, but fault location depends on whether the sound tracks speed, torque or the machine structure.
Helical Gearbox Noise Diagnosis by Speed and Load
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EP-F47 Parallel-Shaft Helical Gear Reducer
The EP-F47 is a 2-stage parallel-shaft helical gear reducer delivering up to 360 N·m output torque from 0.12–4.0 kW across gear ratios 3.77–59.14. Available in foot-mount (F), flange-mount (FF), hollow-bore (FA), flange+hollow (FAF), and torque-arm (FAT) configurations — engineered for quiet, efficient, long-service industrial drive applications.
MOQ: flexible. Minimum order value USD 1,500; mixed orders and trial quantities welcome.
Product Overview — EP-F47 Parallel-Shaft Helical Gear Reducer
Designed for the increasingly demanding standards of food, pharmaceutical, and precision-assembly environments, the EP-F47 parallel-shaft helical gear reducer combines hygienic suitability with the mechanical efficiency that helical gearing uniquely delivers. The two-stage gear arrangement transmits up to 360 N·m at efficiencies exceeding 96% per stage, covering power inputs from 0.12–4.0 kW across the ratio range 3.77–59.14.
Unlike right-angle bevel-helical units, the EP-F47 presents a straight-through drive axis, meaning the motor shaft and output shaft are parallel. This geometry is well-suited to inline conveyor drives, screw conveyor head-ends, and machine drives where radial clearances are tighter than axial clearances. The reduced drivetrain length often eliminates one support bearing in the machine structure, saving both cost and installation time.
The housing exterior is smooth, with no unnecessary projections, contributing to ease of cleaning between production runs. A viton shaft-seal option and NSF-approved synthetic lubricant are available for direct-food-zone service. Discover the full Ever Power gear reducer range to find the right solution for your line speed and torque requirements.
Technical Specifications — EP-F47
| Parameter | Specification |
|---|---|
| Gear Type | Multi-stage parallel-shaft helical gears, precision-ground DIN 6/ISO 6 |
| Number of Stages | 2-stage |
| Motor Power Range | 0.12–4.0 kW |
| Max Output Torque | 360 N·m |
| Gear Ratio Range | 3.77–59.14 |
| Output Speed Range | 25–370 rpm |
| Approximate Unit Weight | 11–16 kg |
| Max Output Radial Load | 4,500 N |
| Transmission Efficiency | ≥ 96% per stage (overall ≥ 92% for 2-stage, ≥ 88% for 3-stage) |
| Lubrication | Splash lubrication; ISO VG 220 mineral oil (factory fill) |
| Housing Material | Close-grained cast iron (HT250 / EN-GJL-250) |
| Gear Material | Case-hardened alloy steel (20CrMnTi / 20MnCr5), HRC 58–62 |
| Protection Rating | IP55 standard; IP65 optional |
| Ambient Temperature | −25 °C to +45 °C (standard lubricant) |
| Noise Level | ≤ 72 dB(A) at rated load (1 m, free-field) |
| Standards Compliance | ISO 6336, DIN 3990 gear rating; ISO 281 bearing life; CE Machinery Directive |
Structural Types & Mounting Configurations — F47 Series
The F47 series is available in multiple structural types to suit different installation geometries and driven-machine interfaces. All types share the same internal gear set and achieve identical torque and efficiency ratings; the differences lie in mounting method and output connection.
| Type Code | Description |
|---|---|
| F47 | foot-mounted, solid output shaft |
| FF47 | B5 flange-mounted, solid output shaft |
| FA47 | shaft-mounted, hollow output shaft |
| FAF47 | B5 flange + hollow output shaft |
| FAT47 | torque-arm, hollow output shaft |
Mounting Positions M1–M6
All F47 structural types support six standard mounting positions (M1 through M6), defined by the angular orientation of the output shaft relative to the horizontal. Oil fill level and vent plug position must be adjusted for each mounting position; refer to the installation manual for position-specific fill quantities and the correct vent-plug orientation.
Key Advantages of the EP-F47
High Transmission Efficiency
Each gear stage delivers ≥96% mechanical efficiency through precision-ground helical flanks and optimised tooth profile corrections. Compared with worm reducers of equivalent output torque, the EP-F47 typically saves 15–35% in electrical energy over the same duty cycle — a saving that often exceeds the gearbox purchase price within two years.
High Torque Density
With up to 360 N·m from a housing sized for 0.12–4.0 kW, the EP-F47 achieves torque density competitive with bevel-helical units of the same output-shaft diameter. The case-hardened alloy-steel gears (HRC 58–62) sustain high Hertzian contact stress without case fatigue, enabling compact dimensions even at the upper end of the power range.
Long, Predictable Service Life
Bearings are selected for a minimum L10h life of 20,000 hours at rated conditions and verified by ISO 281 calculation using actual application load spectra. Precision-ground gears eliminate the geometric errors that cause micro-pitting, extending tooth-flank life to typically 40,000 hours or more when correctly lubricated.
Multiple Structural Types
Five standard structural types — F, FF, FA, FAF, FAT — and an input-shaft-only FA-SZ variant address virtually every machine interface geometry without custom engineering. The FA and FAT hollow-bore types eliminate external couplings entirely, reducing drivetrain length and eliminating one routine maintenance item.
Low Noise & Low Vibration
Helical gear engagement produces a progressive, distributed contact zone rather than the sudden full-face mesh of spur gears. This characteristic, combined with profile-ground tooth flanks and dynamically balanced rotating components, keeps noise levels below 72 dB(A) at 1 m — important in operator-occupied environments and buildings with vibration-sensitive equipment.
Compact Inline Layout
The parallel-shaft geometry keeps the overall drive envelope short in the radial direction, allowing direct-couple installation in machine frames where right-angle units would require a longer cantilevered arrangement. The F47's small envelope also reduces the inertia of the stationary drive assembly, which matters in frequent-cycle indexing applications.
Structural Type Diagrams — F47 Series
The diagrams below show the external geometry and connection interfaces for each structural type in the F47 family. Use these to confirm mounting space requirements and driven-machine interface compatibility before finalising your order.
F47 Standard Foot-Mount (Solid Output Shaft)
FF47 Flange-Mount (Solid Output Shaft)
FA47 Shaft-Mounted (Hollow Output Bore)
FAF47 Flange + Hollow Bore
FAT47 Torque-Arm (Hollow Bore)
FA47-SZ Input Shaft Only
Industry Applications — Where the EP-F47 Excels
| Industry Sector | Typical Application |
|---|---|
| Food Processing Lines | Portion-cutting machines, cheese slicers, and dough feeders where hygienic enclosed drives prevent contamination. |
| Pharmaceutical Production | Blister-pack conveyors and tablet press feeders operating under strict cleanroom standards. |
| Automated Guided Vehicles | AGV traction drives where in-line mounting keeps chassis height to a minimum. |
| Packaging Machines | Vertical form-fill-seal machines and cartoning lines requiring precise speed synchronisation. |
Application Case Study: Pharmaceutical Blister-Pack Line
A pharmaceutical manufacturer replaced worn worm reducers on six blister-pack conveyors with EP-F47 in-line units. Precision helical gearing held speed variation below 0.1%, preventing blister misalignment. After 18 months of cleanroom operation, zero unplanned stops have been recorded.
Model Designation Guide — How to Order an EP-F47
The model code contains all ordering information required for production. An example order code for a torque-arm, hollow-bore, 7.5 kW unit is:
EP - F47 - FAT - Y - 3 - 7.5 - 4P - M1
| Code Element | Meaning |
|---|---|
| EP | Brand identifier — Ever Power |
| F47 | Series and frame size |
| FAT | Structural type: torque-arm, hollow-bore output |
| Y | Motor type: Y-series IEC standard induction motor |
| 3 | Number of gear stages |
| 7.5 | Motor rated power in kW |
| 4P | Motor pole count (1,450 rpm at 50 Hz) |
| M1 | Mounting position |
Frequently Asked Questions — EP-F47
Start Your EP-F47 Project Today
Send us your application parameters — motor power, output speed, load type, and mounting constraints — and we will respond with a validated gear selection within one business day. Sample units are available for evaluation. Visit our contact page to begin.
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