Audible noise is evidence to investigate, but fault location depends on whether the sound tracks speed, torque or the machine structure.
EP-K187 Right-Angle Helical Bevel Gear Reducer
Input Power 0.55–200 kW | Max. Output Torque 52000 N·m | Gear Ratio 5.36–250 | Right-Angle Output • Multiple Mounting Types
Product Overview
The EP-K187 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-K187 covers an input power range of 0.55–200 kW and a maximum permitted
output torque of 52000 N·m. The standard gear ratio range is 5.36–250,
giving output speeds from 3.2–42,193 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 | 187 | K187 series |
| Rated Input Power | 0.55–200 kW | Mating motor power range |
| Max. Output Torque | 52000 N·m | Permitted maximum |
| Gear Ratio Range | 5.36–250 | Standard ratio series |
| Output Speed Range | 3.2–42,193 rpm | With standard motor speeds |
| Permitted Radial Force | 171,000 N | At output shaft end |
| Unit Weight | 1,883 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-K187 is available in the following mounting configurations, each designed for a specific
installation requirement:
- K187 (foot-mounted, solid output shaft)
- KA187 (shaft-mounted, hollow output shaft)
- K187SZ — input-shaft-only variant (no motor); accepts a customer-supplied coupling or pulley
- K187R — combination of K187 and R-series helical reducer for very high overall ratios
- KAT187 — 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-K187 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 | 187 | 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: KAF187-Y0.75-4P-35.57-M1-B-90°
— KAF-type, frame 187, 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 |
|---|---|
| Large Grinding Mills | Auxiliary drives for ball mills and SAG mills in mining plants. |
| Cement Rotary Kilns | Main slow-rotation drives for large rotary kilns. |
| Offshore Drilling | Drawworks drives on offshore drilling platforms. |
| Large Ship Propulsion | Auxiliary transmission drives for large vessel propulsion systems. |
The 90° right-angle output shaft of the EP-K187 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-K187
delivers a reliable and efficient drive solution across a wide range of sectors.
Case Study: Cement Rotary Kiln Auxiliary Drive
A 5,000 t/d cement kiln uses an EP-K187 as its auxiliary slow-rotation drive, providing 50,000 N·m output torque. When the main drive trips, the auxiliary drive keeps the kiln barrel turning slowly to prevent thermal distortion — protecting a capital asset valued at over USD 100 million.
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 K187 frame delivers up to 52000 N·m in a package weighing only 1,883 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-K187 selection:
| Selection Criterion | Guidance | EP-K187 Limit |
|---|---|---|
| Required output torque | Calculate from load and duty cycle | ≤ 52000 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 0.55–200 kW range |
| Mounting type | Match to equipment layout | K / KF / KA / KAF / KAB / KAT |
| Output radial force | Include belt/chain tension | ≤ 171,000 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
Is the EP-K187 the largest unit in the K series?
The K187 is the largest frame in the Ever Power standard K-series catalogue, with a rated output torque up to 52,000 N·m. For requirements beyond this limit, non-standard custom designs can be quoted.
What is the transmission efficiency of the K187?
A single K187 unit achieves 94–96% efficiency depending on ratio and load. A combined K187R (K187 in series with an R-series unit) gives approximately 88–92%. Although absolute power losses are large at this scale, the relative efficiency figures are consistent with smaller frame sizes.
How are the inspection and observation ports arranged on the K187?
The K187 housing lid has multiple threaded plugs that accept an industrial borescope for in-situ tooth-flank inspection without disassembly. The side wall carries an oil-level sight glass and temperature-sensor port. The drain plug is DN40; the breather plug at the top is recommended to be replaced with a combined breather and particulate filter.
How can online oil-condition monitoring be implemented for the K187?
Install an inline oil-quality sensor measuring viscosity, water content, and ferrous particle concentration. Interface the sensor with a predictive lubrication management (PLM) system to provide continuous condition monitoring. This approach typically reduces unplanned downtime by around 30% compared with time-based oil changes.
Is stock inventory held for the K187, and what is the typical lead time?
The K187 is a large customised product; standard stock is not maintained. Typical lead time from order acceptance is 15–25 working days, including production, assembly, testing, and packing. Priority scheduling for urgent orders is available — please contact the Ever Power sales team to confirm current availability.
Request a Quote or Technical Support
Need technical data sheets, CAD drawings, or a custom selection service for the EP-K187?
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