Audible noise is evidence to investigate, but fault location depends on whether the sound tracks speed, torque or the machine structure.
EP-K157 Right-Angle Helical Bevel Gear Reducer
Input Power 0.55–90 kW | Max. Output Torque 22000 N·m | Gear Ratio 5.36–250 | Right-Angle Output • Multiple Mounting Types
Product Overview
The EP-K157 is a helical-bevel gear reducer designed for industrial applications that require a
right-angle (90°) change of transmission direction. The drive combines
two stages of helical cylindrical gears with one stage of spiral bevel gears
in a compact three-stage arrangement, delivering precise directional change, wide ratio coverage,
and high efficiency in a single robust housing.
All gears are machined from 20CrMnTi low-carbon alloy steel, carburised and case-hardened to a
tooth-flank hardness of HRC 58–62, with contact fatigue strength σH ≥ 1,500 MPa and bending
fatigue strength σF ≥ 450 MPa. Ground tooth flanks achieve GB/T 10095.1 accuracy grade 6,
minimising noise and vibration and maximising transmission smoothness.
The EP-K157 covers an input power range of 0.55–90 kW and a maximum permitted
output torque of 22000 N·m. The standard gear ratio range is 5.36–250,
giving output speeds from 4.5–23,709 rpm with a 4P induction or servo motor.
Six mounting types — foot (K), B5-flange (KF), shaft-mounted hollow-bore (KA, KAF),
GK-housing hollow-bore (KAB), and torque-arm shaft-mounted (KAT) — cover virtually
every installation requirement. Standard ingress protection is IP55, with IP65 available on request.
The housing is precision-cast from HT250 high-strength grey cast iron and stress-relief aged
to ensure long-term dimensional stability. All rolling-element bearings are sourced from
premium manufacturers, designed to an L10h service life of ≥ 20,000 hours.
A balanced internal pressure system and high-integrity shaft seals prevent lubricant leakage
and exclude external contamination.
Key Technical Specifications
| Parameter | Value | Notes |
|---|---|---|
| Frame Size | 157 | K157 series |
| Rated Input Power | 0.55–90 kW | Mating motor power range |
| Max. Output Torque | 22000 N·m | Permitted maximum |
| Gear Ratio Range | 5.36–250 | Standard ratio series |
| Output Speed Range | 4.5–23,709 rpm | With standard motor speeds |
| Permitted Radial Force | 108,680 N | At output shaft end |
| Unit Weight | 760–880 kg | Varies with motor configuration |
| Mounting Positions | M1–M6 (6 positions) | Any mounting orientation |
| Motor Pole Count | 4P | Standard 50 Hz configuration |
| Gear Accuracy Grade | Grade 6 | GB/T 10095.1 |
| Ingress Protection | IP55 standard / IP65 optional | GB/T 4942.1 |
| Lubrication | Splash + pressure-balanced breather | Mineral oil standard |
| Ambient Temperature | −10 °C to +40 °C | Synthetic oil for low-temp. sites |
| Duty Cycle | Continuous (S1) | Intermittent duty also supported |
| Noise Level | ≤78 dB(A) | No-load, rated speed |
Mounting Types & Installation Positions
The EP-K157 is available in the following mounting configurations, each designed for a specific
installation requirement:
- K157 (foot-mounted, solid output shaft)
- KF157 (B5 flange-mounted, solid output shaft)
- KA157 (shaft-mounted, hollow output shaft)
- KAF157 (B5 flange + hollow output shaft)
- K157SZ — input-shaft-only variant (no motor); accepts a customer-supplied coupling or pulley
- K157R — combination of K157 and R-series helical reducer for very high overall ratios
- KAT157 — KA type with integrated anti-rotation torque arm for rigid shaft-mount installations
All mounting types support six standard mounting positions (M1 to M6):
| Position | Definition | Typical Use |
|---|---|---|
| M1 | Motor horizontal, housing feet down (standard position) | Suits the majority of horizontal drive applications |
| M2 | Motor horizontal, motor below housing | For upward-facing output shaft or suspended installation |
| M3 | Motor horizontal, housing feet up | For overhead platform mounting |
| M4 | Motor above housing | Saves horizontal floor space in side-drive layouts |
| M5 | Motor horizontal, housing left side down | For drives mounted on a vertical face |
| M6 | Motor horizontal, housing right side down | Mirror image of M5 for opposite-hand mounting |
Model Designation Guide
A complete EP-K157 series model number encodes all key configuration data.
The fields are defined in the table below:
| Field | Example | Meaning |
|---|---|---|
| Mounting type | KAF | B5-flange + hollow output shaft |
| Frame size | 157 | Housing size number |
| Motor type & power | Y0.75 | Y-series motor, 0.75 kW |
| Pole count | 4P | 4-pole motor (approx. 1,450 rpm) |
| Gear ratio | 35.57 | Exact ratio from standard series |
| Mounting position | M1 | Standard horizontal, feet down |
| Output shaft direction | B | Output shaft hand (A or B) |
| Terminal box position | 90° | Motor terminal box orientation |
Order example: KAF157-Y0.75-4P-35.57-M1-B-90°
— KAF-type, frame 157, Y-series 0.75 kW motor, 4-pole, ratio 35.57, M1 mounting, B-hand output, terminal box at 90°.
Typical Industry Applications
| Industry | Typical Application |
|---|---|
| Super-Heavy Mining | Extra-wide armoured face conveyor main drives. |
| Oil Refining | Large compressor train auxiliary drives in refineries. |
| Nuclear Facilities | Cooling water pump auxiliary drives in nuclear islands. |
| Large Hydropower | Flood gate hoist machinery for major dam installations. |
The 90° right-angle output shaft of the EP-K157 gives it a decisive advantage wherever
space is constrained or the transmission direction must change. From precision low-speed
processes to continuous heavy-duty industrial operations, the EP-K157
delivers a reliable and efficient drive solution across a wide range of sectors.
Case Study: Open-Cast Coal Face Conveyor
The head drive of a wide armoured face conveyor at a large open-cast coal mine uses twin EP-K157 units providing a combined 160 kW input. Starting torque reaches 3.5 times rated, and annual production has exceeded 10 million tonnes since installation.
Key Product Advantages
High Efficiency
Three-stage combined drive achieves 94–97% unit efficiency. Ground spiral bevel flanks minimise mesh losses and heat generation.
High Torque Density
Compact housing achieves an excellent torque-to-weight ratio. The K157 frame delivers up to 22000 N·m in a package weighing only 760–880 kg.
Long Service Life
L10h bearing life target ≥ 20,000 hours. Premium rolling bearings, engineered lubrication and robust sealing support a 15–20 year equipment life.
Versatile Installation
Foot, flange, shaft-mount and torque-arm types with M1–M6 positions cover virtually every spatial constraint and layout requirement.
Low Noise & Vibration
Grade 6 ground gears and precision-balanced spiral bevel stage keep sound pressure below 78 dB(A), suitable for noise-sensitive production environments.
Wide Ratio Range
Standard ratio series 5.36–250 covers a broad output speed range in one frame size, eliminating the need for separate gearbox families for different applications.
Selection Guide
Confirm the following parameters before finalising your EP-K157 selection:
| Selection Criterion | Guidance | EP-K157 Limit |
|---|---|---|
| Required output torque | Calculate from load and duty cycle | ≤ 22000 N·m |
| Service factor fB | 1.0 smooth; 1.25–1.75 moderate shock | Apply to required torque before comparing |
| Required gear ratio | Motor speed ÷ output speed | Select nearest standard value in 5.36–250 |
| Motor input power | Rated motor power | Within 0.55–90 kW range |
| Mounting type | Match to equipment layout | K / KF / KA / KAF / KAB / KAT |
| Output radial force | Include belt/chain tension | ≤ 108,680 N |
About Ever Power
Ever Power is a specialist manufacturer and global supplier of industrial power transmission equipment,
including helical-bevel gear reducers, helical gear reducers, worm gear reducers, planetary gearboxes,
bevel gearboxes, and matched gearmotors. Our manufacturing facilities operate under ISO 9001 quality
management systems, and our products carry CE certification as standard.
With customers across mining, cement, steel, paper, port, food processing, and general industrial sectors,
Ever Power combines engineering depth with responsive global logistics. Our technical team provides
full selection calculations, dimensional drawings, and application engineering support —
typically within one working day.
We supply sample quantities of 1–5 units for evaluation and prototype projects.
Mixed-model orders are accepted from approximately USD 1,500. Standard production lead time is
10–25 working days; priority scheduling is available for urgent requirements.
Learn more about Ever Power.
Frequently Asked Questions
What high-power industrial applications suit the EP-K157?
With an input power range of 0.55 to 90 kW and maximum output torque of 22,000 N·m, the K157 is well suited to large mining face conveyors, heavy port bulk-handling equipment, large paper-machine drive sections, and high-power industrial agitators.
What material is the K157 housing made from?
The standard housing is HT250 high-strength grey cast iron, processed by stress-relief ageing to ensure long-term dimensional stability. A GGG500 nodular cast iron option offers higher impact resistance. For the most demanding applications, a cast-steel housing is available on special order.
Can the K157 start reliably at −20 °C?
The standard mineral oil has limited low-temperature flow below −10 °C. For environments down to −30 °C, specify a synthetic PAO-based gear oil with a viscosity grade of ISO VG 150 or 220 to ensure proper lubrication at start-up.
What does a major overhaul of the K157 involve?
A full overhaul every five years typically includes: cleaning and inspection of all internal parts, replacement of all lip seals, measurement of gear tooth pitting and wear (renew if beyond limits), bearing axial-clearance check, reassembly, and a full-load test run with vibration and temperature records archived for future reference.
Can the K157 be field-serviced, or must it be returned to the factory?
Oil changes and seal replacements can be carried out on site. Gear replacement requires specialist tooling and is best performed by an Ever Power factory-authorised service engineer or at the manufacturing facility. Major overhauls are recommended at the factory to allow full load testing before the unit is returned to service.
Request a Quote or Technical Support
Need technical data sheets, CAD drawings, or a custom selection service for the EP-K157?
Our engineering team is ready to assist:
- Full selection parameter tables (constant-power and constant-torque duty)
- Free 2D and 3D installation dimension drawings
- Custom gear ratios, ingress protection levels, and surface treatments
- Samples: 1–5 units; mixed orders from approx. USD 1,500; 10–25 working days lead time