Audible noise is evidence to investigate, but fault location depends on whether the sound tracks speed, torque or the machine structure.
EP-K97 Right-Angle Helical Bevel Gear Reducer
Input Power 0.12–30 kW | Max. Output Torque 6500 N·m | Gear Ratio 5.36–200 | Right-Angle Output • Multiple Mounting Types
Product Overview
The EP-K97 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-K97 covers an input power range of 0.12–30 kW and a maximum permitted
output torque of 6500 N·m. The standard gear ratio range is 5.36–200,
giving output speeds from 7.2–4,877 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 | 97 | K97 series |
| Rated Input Power | 0.12–30 kW | Mating motor power range |
| Max. Output Torque | 6500 N·m | Permitted maximum |
| Gear Ratio Range | 5.36–200 | Standard ratio series |
| Output Speed Range | 7.2–4,877 rpm | With standard motor speeds |
| Permitted Radial Force | 38,000 N | At output shaft end |
| Unit Weight | 160–205 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-K97 is available in the following mounting configurations, each designed for a specific
installation requirement:
- K97 (foot-mounted, solid output shaft)
- KF97 (B5 flange-mounted, solid output shaft)
- KA97 (shaft-mounted, hollow output shaft)
- KAF97 (B5 flange + hollow output shaft)
- KAB97 (GK housing, hollow output shaft)
- KAB97 — GK-housing shaft-mount type with hollow output shaft; designed for high radial loads (available on selected sizes)
- K97SZ — input-shaft-only variant (no motor); accepts a customer-supplied coupling or pulley
- K97R — combination of K97 and R-series helical reducer for very high overall ratios
- KAT97 — 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-K97 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 | 97 | 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: KAF97-Y0.75-4P-35.57-M1-B-90°
— KAF-type, frame 97, 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 |
|---|---|
| Underground Mining | Armoured face conveyors and longwall haulage systems. |
| Port Handling | Bulk unloader travel drives and boom luffing systems. |
| Continuous Casting | Straightener and withdrawal rolls in steel casting lines. |
| Cement & Minerals | Vertical mill hydraulic roller presses and auxiliary drives. |
The 90° right-angle output shaft of the EP-K97 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-K97
delivers a reliable and efficient drive solution across a wide range of sectors.
Case Study: Continuous Casting Withdrawal
A slab caster withdrawal and straightening unit uses EP-K97 gearboxes delivering 5,800 N·m output torque. Hydraulic couplings provide smooth starting, and PLC speed control maintains casting speed accuracy within ±0.01 m/min, raising slab quality yield by 15%.
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 K97 frame delivers up to 6500 N·m in a package weighing only 160–205 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 5.36–200 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-K97 selection:
| Selection Criterion | Guidance | EP-K97 Limit |
|---|---|---|
| Required output torque | Calculate from load and duty cycle | ≤ 6500 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 5.36–200 |
| Motor input power | Rated motor power | Within 0.12–30 kW range |
| Mounting type | Match to equipment layout | K / KF / KA / KAF / KAB / KAT |
| Output radial force | Include belt/chain tension | ≤ 38,000 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
What is the maximum output torque available in the K97 series?
The K97 series reaches its highest output torque in the K97R77 combination unit (K97 in series with an R77). The stand-alone K97 rated torque is approximately 6,500 N·m; the K97R combination can exceed this figure depending on configuration.
How is the hollow bore diameter selected for a KAB97?
The KAB97 hollow bore is sized to the driven shaft diameter. Available bore diameters for the K97 KAB type typically range from 50 to 80 mm. Ensure that the keyway stress is within permissible limits at the required torque; contact Ever Power to confirm the correct bore and key size for your shaft.
What maintenance schedule is recommended for K97 units in 24/7 mining service?
Inspect gear tooth surfaces every six months. Take oil samples for ferrographic analysis quarterly. Change oil at 500 hours for the initial fill, then every 8,000 hours or annually. Reduce the interval to every six months in extreme dust or vibration.
Can a K97 directly replace a K107 in an existing installation?
No — the K97 and K107 have different foot-mounting bolt patterns, output shaft diameters, and flange dimensions. A direct drop-in swap is not possible. Lock in the gearbox frame size at the project design stage to avoid costly foundation modifications later.
What surface treatment is recommended for K97 units installed near the sea?
Specify enhanced C3 or C4 corrosion protection paint system, stainless-steel output shaft, and stainless-steel external fasteners. Apply anti-corrosion grease to all exposed mating surfaces after installation, and inspect and re-coat annually in marine environments.
Request a Quote or Technical Support
Need technical data sheets, CAD drawings, or a custom selection service for the EP-K97?
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