K Series Helical-Bevel Gearmotor – Compact Right Angle Reducer

K Series Helical-Bevel Gearmotor – Compact Right Angle Reducer

Right angle helical-bevel gearmotor with 90° drive configuration. 0.18-200kW power, torque up to 50000Nm, efficiency over 90%. Available in 11 series with foot, flange & shaft mounting.

Product Introduction

The K Series helical-bevel gearmotor features a right angle drive configuration utilizing helical-bevel gear technology. This compact right angle reducer combines cast iron housing construction with modular design architecture, providing power transmission from 0.18 kW to 200 kW with maximum torque capacity reaching 50,000 N·m. The series offers eleven distinct model configurations covering solid shaft and hollow shaft output options, accommodating diverse mounting requirements through foot-mounted, flange-mounted, and shaft-mounted installations.

Core Design Elements

Cast Iron Housing Construction

The gearmotor housing utilizes cast iron material, providing structural support for the helical-bevel gear arrangement. The housing design accommodates the right angle configuration where input and output shafts are positioned at 90 degrees to each other.

Helical-Bevel Gear Technology

The transmission system employs helical-bevel gears arranged in a right angle configuration. This gear arrangement enables the 90-degree shaft orientation characteristic of the K Series design. The gear units achieve efficiency levels over 90% as specified in the product features.

Modular System Design

Eleven Series Configurations

The K Series encompasses eleven distinct model ranges addressing various output shaft and mounting requirements:

K Series (Standard): Foot-mounted configuration with solid shaft output. Models from K38 through K188 provide output shaft diameters from Ø25mm to Ø190mm solid shaft.

KAB Series: Foot-mounted design featuring hollow shaft output. This configuration offers output shaft diameters ranging from Ø30mm to Ø160mm hollow shaft.

KA Series: Equipped with keyed hollow shaft output, providing mechanical connection through keyway design.

KF Series: B5 flange-mounted configuration with solid shaft output, enabling direct flange attachment to equipment.

KAF Series: B5 flange-mounted design incorporating hollow shaft output, combining flange mounting convenience with hollow shaft configuration.

KAZ Series: B14 flange-mounted configuration with hollow shaft output, accommodating B14 standard flange dimensions.

KAT Series: Features hollow shaft output with integrated torque arm for hanging shaft-mounted installations.

KH, KHB, KHF, KHZ Series: Hollow shaft output configurations equipped with shrink disk connection system for secure shaft mounting without keyways.

KV, KVB, KVF, KVZ Series: Hollow shaft output with splined hollow shaft design, providing alternative connection method for output shaft attachment.

K(KA, KF, KAF, KAB, KAZ)S Series: Solid shaft input variants of the respective series, accepting power input through solid input shaft instead of direct motor mounting.

Multi-Stage Reduction Options

The series provides 2-stage or 3-stage gear unit configurations for applications requiring low output speed. Multi-stage arrangements enable higher reduction ratios within the compact housing design, with ratio ranges from 5.36 to 178.37 across the complete model range.

Motor Integration Options

Electric Motor Configurations

The K Series accommodates direct motor mounting through equipped electric motor configurations. Standard input arrangements include IEC-normalized motor flange connections, enabling compatibility with various motor types.

Applicable Motor Types

The design supports integration with multiple motor categories:

Single Phase AC Motor: Compatible with single-phase power supply applications.

Three Phase AC Motor: Accommodates standard three-phase industrial motors across the power range.

Brake Motors: Accepts motors equipped with electromagnetic braking systems.

Inverter Motors: Compatible with variable frequency drive (VFD) controlled motors for speed regulation applications.

Multi-Speed Motors: Supports motors featuring multiple speed winding configurations.

Explosion-Proof Motors: Accepts certified explosion-proof motors for hazardous environment installations.

Roller Motors: Compatible with specialized roller motor configurations.

Input Configuration Flexibility

Beyond direct motor mounting, the series offers solid shaft input options through the “S” series variants (KS, KAS, KFS, KAFS, KABS, KAZS). These configurations accept power input via solid input shaft with keyway, enabling connection to separate drive sources or non-standard motors.

Output Shaft Configurations

Solid Shaft Output

Standard K Series and KF Series models feature solid shaft output with keyed connection. Output shaft diameters range from Ø25mm through Ø190mm depending on model size, providing direct shaft coupling capability.

Hollow Shaft Output Options

Multiple hollow shaft configurations address different mounting and connection requirements:

Keyed Hollow Shaft (KA Series): Hollow output shaft incorporates keyway for traditional keyed connection to driven equipment shafts.

Shrink Disk Connection (KH, KHB, KHF, KHZ Series): Hollow shaft utilizes shrink disk mounting system, providing keyless connection through friction fit. This method enables precise centering and facilitates assembly/disassembly procedures.

Splined Hollow Shaft (KV, KVB, KVF, KVZ Series): Output shaft features internal splines, enabling splined shaft connection without keyway requirements.

Torque Arm Configuration (KAT Series): Hollow shaft output designed for shaft-mounted installations, incorporating torque arm assembly to absorb reaction forces during operation.

Technical Specifications

Complete Model Range Parameters

Model	Solid Shaft Output	Hollow Shaft Output	Input Shaft	Power (kW)	Ratio Range	Max Torque (Nm)
K38	Ø25mm	Ø30mm	Ø16mm	0.18-3.0	5.36-106.38	200
K48	Ø30mm	Ø35mm	Ø19mm	0.18-3.0	5.81-131.87	400
K58	Ø35mm	Ø40mm	Ø19mm	0.18-5.5	6.57-145.15	600
K68	Ø40mm	Ø40mm	Ø19mm	0.18-5.5	7.14-144.79	820
K78	Ø50mm	Ø50mm	Ø24mm	0.37-11	7.22-192.18	1,550
K88	Ø60mm	Ø60mm	Ø28mm	0.75-22	7.19-197.27	2,700
K98	Ø70mm	Ø70mm	Ø38mm	1.3-30	8.95-175.47	4,300
K108	Ø90mm	Ø90mm	Ø42mm	3-45	8.74-141.93	8,000
K128	Ø110mm	Ø100mm	Ø55mm	7.5-90	8.68-146.07	13,000
K158	Ø120mm	Ø120mm	Ø70mm	11-160	12.66-150.03	18,000
K168	Ø160mm	Ø140mm	Ø70mm	11-200	17.35-164.44	32,000
K188	Ø190mm	Ø160mm	Ø70mm	18.5-200	17.97-178.37	50,000

Installation Methods

Foot-Mounted Configuration

Foot-mounted models (K Series, KAB Series, KA Series) feature mounting feet for installation on horizontal surfaces or equipment bases. This configuration provides stable support and accommodates various foundation designs.

B5 Flange-Mounted

B5 flange-mounted variants (KF Series, KAF Series) incorporate B5 standard flange dimensions for direct attachment to equipment flanges or motor brackets. This mounting method eliminates separate foot-mounted base requirements.

B14 Flange-Mounted

B14 flange-mounted configuration (KAZ Series) utilizes B14 standard flange specifications, providing alternative flange mounting option for equipment with B14 flange interfaces.

Shaft-Mounted

Shaft-mounted installation (KAT Series and torque arm configurations) enables direct mounting onto driven equipment shafts. The torque arm assembly absorbs reaction forces, securing the gearmotor position during operation without separate mounting base.

System Integration Capability

Combination with Other Gearbox Types

The K Series design enables combination with additional gearbox types to expand application possibilities:

K + R Series Combination: Connecting K Series helical-bevel units with R Series coaxial helical gearboxes creates combined drive configurations. This arrangement can achieve extended ratio ranges or specific shaft orientation requirements.

K + UDL Series Combination: Integration with UDL Series stepless variators enables variable speed control capability. The combination provides adjustable output speed while maintaining the right angle configuration of the K Series.

These combination options utilize standard interface connections between gearbox types, facilitating system assembly for specialized drive requirements.

Lubrication and Cooling Systems

Oil-Bath and Splash Lubrication

The gearmotor employs oil-bath and splash lubrication methodology. Gear rotation distributes lubricant throughout the gear chamber, providing continuous lubrication to all meshing surfaces and bearing locations. This passive lubrication system operates without external pumps or circulation equipment.

Natural Cooling Design

Heat dissipation occurs through natural cooling from the cast iron housing surfaces. The housing design facilitates heat transfer from internal components to the external environment through natural convection and radiation, maintaining operational temperatures without forced cooling systems.

Product Features Summary

The K Series helical-bevel gearmotor incorporates the following specified features:

1. Compact Structure, Modular Design: The right angle configuration provides space-efficient installation where 90-degree drive orientation is required. Modular design architecture enables various model configurations from standardized components.

2. High Efficiency: Gear units achieve efficiency levels over 90% as specified in product features.

3. Long Service Life: The design parameters and construction support extended operational service life.

4. Multi-Stage Gear Units: Two-stage or three-stage configurations enable low output speed requirements through increased reduction ratios.

5. Hollow Output Shaft Options: Multiple hollow shaft configurations are available including keyed connection, shrink disk, splined hollow shaft, and torque arm variants, addressing diverse mounting and connection requirements.

6. Combination Capability: The series can be combined with R Series and UDL Series gearboxes for expanded drive configuration possibilities.

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Quick Specifications Reference

Parameter	Specification
Power Range	0.18 ~ 200 kW
Max Torque	Up to 50,000 N·m
Ratio Range	5.36 ~ 178.37
Efficiency	Over 90%
Housing Material	Cast Iron
Gear Type	Helical-Bevel
Drive Configuration	Right Angle (90°)
Output Options	Solid Shaft, Hollow Shaft (keyed, shrink disk, splined, torque arm)
Input Options	Direct Motor Mount (IEC flange), Solid Shaft Input
Motor Compatibility	Single/Three-phase, Brake, Inverter, Multi-speed, Explosion-proof, Roller
Mounting Types	Foot-mounted, B5 Flange, B14 Flange, Shaft-mounted
Stages Available	2-stage, 3-stage
Lubrication	Oil-bath & Splash
Cooling	Natural Cooling
Combination Options	Compatible with R Series, UDL Series

For detailed selection guidance or custom configuration requirements, please consult our applications engineering team.