KM Series Hypoid Gearmotor – High Torque Right Angle Drive

KM Series Hypoid Gearmotor – High Torque Right Angle Drive

High efficiency hypoid gearmotor with right angle drive. 130-750Nm torque, efficiency >90%, 2 or 3 stage reduction. Aluminum/cast iron housing, ratios 7.5-300.

Product Introduction

The KM Series hypoid gearmotor features a helical and hypoid bevel gear set in a right angle drive configuration. This high torque reducer utilizes 20CrMnTi steel gears with carburizing and nitriding treatment, achieving 58-62 HRC gear hardness. The series provides torque capacity from 130 N·m to 750 N·m across five frame sizes (KM050, KM063, KM075, KM090, KM110) with modular design enabling various combinations. The efficiency exceeds 90%, offering approximately 10%-40% efficiency improvement compared with RV series worm gearbox.

Housing Construction

Aluminum Alloy Housing (KM050-KM090)

Frame sizes KM050 through KM090 utilize aluminum alloy material for housing construction. The aluminum alloy housing undergoes shot blasting, anticorrosion treatment, and phosphating processes before painting with RAL5010 Blue or RAL7035 Silver Gray color finish.

Gray Cast Iron Housing (KM110)

Frame size KM110 employs gray cast iron material for housing construction. The cast iron housing provides the structural framework for the larger frame size requirements.

Helical and Hypoid Bevel Gear Technology

Gear Material and Processing

The transmission system employs helical and hypoid bevel gear sets manufactured from 20CrMnTi steel. The gears undergo carburizing and nitriding heat treatment processes, with 0.3-0.6mm remaining carburized layer after precise grinding operations. This processing achieves gear surface hardness of 58-62 HRC.

Gear Strength and Durability

The hardened gears provide higher gear hardness and strength compared to RV series worm gears. This enhanced hardness contributes to wearable characteristics and long service life as specified in the product features.

Energy Efficiency

The helical and hypoid bevel gear design delivers efficiency exceeding 90%. This represents approximately 10%-40% efficiency difference compared with RV series worm gearbox, as stated in the product specifications. The high efficiency characteristic enables energy savings during operation.

Multi-Stage Reduction Options

2-Stage Configuration

Two-stage helical and hypoid bevel gear arrangements provide ratios of 7.5, 10, 12.5, 15, 20, 25, 30, 40, 50, and 60. At input speed of 1400 r/min, output speeds range from 23-187 r/min depending on selected ratio.

3-Stage Configuration

Three-stage gear configurations offer ratios of 50, 60, 75, 100, 125, 150, 200, 250, and 300. At input speed of 1400 r/min, output speeds range from 4.6-28 r/min, enabling large reduction ratios for low-speed applications.

Input Configuration Options

Electric Motor Integration

The KM Series accommodates direct motor mounting with multiple motor types:

AC Motor: Compatible with standard alternating current motors across the power range.

Brake Motor: Accepts motors equipped with electromagnetic braking systems for applications requiring immediate stopping or load holding.

DC Motor: Supports direct current motor integration for DC power supply applications.

Servo Motor: Compatible with servo motors for precision motion control and positioning applications.

Hollow Shaft Input with Flange Options

Alternative input configurations feature hollow shaft input accepting various flange standards:

IEC Flange (B5/B14): Hollow shaft input with IEC-normalized B5 or B14 flange dimensions for standardized motor mounting.

NEMA Flange: Hollow shaft input accommodating NEMA standard flange specifications for North American motor compatibility.

Servo Motor Flange: Specialized hollow shaft input with servo motor flange interface for direct servo motor attachment.

Solid Shaft Input

Solid shaft input configuration accepts power through keyed solid input shaft, enabling connection to separate drive sources or coupling to non-standard motors.

Output Configuration Options

Keyed Hollow Shaft Output

Keyed hollow shaft output features internal keyway for traditional keyed connection to driven equipment shafts. This configuration enables direct mounting on driven shafts without additional coupling components.

Hollow Shaft with Output Flange

Hollow shaft configuration incorporates integrated output flange. The flange enables bolted connection to driven equipment while maintaining hollow shaft design for shaft pass-through applications.

Plug-in Solid Shaft Output

Plug-in solid shaft output provides removable solid output shaft design. This configuration offers solid shaft connection capability with modular plug-in installation method.

Technical Specifications

Complete Model Range Parameters

Model	Stage	Nominal Ratio	Output Speed (r/min)*	Max Torque (Nm)	Input Shaft Dia.	Output Hole Dia.	Output Shaft Dia.
KM050	3-Stage	50-300	4.8-27	130	Φ11	Φ20, Φ25	Φ25
KM050	2-Stage	7.5-60	24-181	130	Φ11	Φ20, Φ25	Φ25
KM063	3-Stage	50-300	4.6-27	200	Φ11	Φ25, Φ28	Φ25
KM063	2-Stage	7.5-60	23-184	200	Φ14	Φ25, Φ28	Φ25
KM075	3-Stage	50-300	4.7-28	350	Φ14	Φ28, Φ30, Φ35	Φ28
KM075	2-Stage	7.5-60	24-187	350	Φ16	Φ28, Φ30, Φ35	Φ28
KM090	3-Stage	50-300	4.7-28	500	Φ14	Φ35, Φ38	Φ35
KM090	2-Stage	7.5-60	24-187	500	Φ19	Φ35, Φ38	Φ35
KM110	3-Stage	50-300	4.7-27	750	Φ19	Φ40, Φ42	Φ42
KM110	2-Stage	7.5-60	24-187	750	Φ24	Φ40, Φ42	Φ42

*Based on input speed n1=1400 r/min

Available Ratios:

• 3-Stage: 300, 250, 200, 150, 125, 100, 75, 60, 50
• 2-Stage: 60, 50, 40, 30, 25, 20, 15, 12.5, 10, 7.5

Product Features

The KM Series hypoid gearmotor incorporates the following specified features:

1. 2-Stage or 3-Stage Helical & Hypoid Bevel Gear Set, Large Reduction Ratio: Multi-stage configurations combining helical and hypoid bevel gears enable large reduction ratios. Three-stage arrangements achieve ratios up to 300, providing substantial speed reduction for low-speed, high-torque applications.

2. Hardened Gears, Higher Gear Hardness and Strength than RV Series Worm Gears. Wearable and Long Service Life: The carburizing and nitriding process produces 58-62 HRC surface hardness, exceeding the gear hardness of RV series worm gears. Enhanced hardness contributes to wear resistance and extended operational service life.

3. Energy Efficient. The Efficiency is More Than 90%. About 10%~40% Efficiency Difference Compared with RV Series Worm Gearbox: The helical and hypoid bevel gear design achieves efficiency exceeding 90%. This represents approximately 10% to 40% higher efficiency compared to RV series worm gearboxes, reducing energy consumption and operational costs.

4. Modular Design, Various Combinations: The modular architecture enables multiple configuration combinations. Users can select from various input options (motor types, flange standards, shaft input) and output configurations (hollow shaft, output flange, plug-in solid shaft) based on application requirements.

5. Mounting Dimensions are Compatible with RV Series (Except KM050 and RV050): Mounting dimensions maintain compatibility with RV series worm gearboxes across most frame sizes. This interchangeability facilitates direct replacement in existing installations, with the exception of KM050 and RV050 models which have different mounting specifications.

6. High Efficiency KM Series Can Replace RV Series in Wide Applications: The superior efficiency characteristics enable KM series deployment as replacement for RV series worm gearboxes across diverse applications. The efficiency improvement and comparable mounting dimensions support retrofit installations seeking energy savings.

Spare Parts Availability

The KM Series provides complete spare parts support including:

Output Shaft: Replacement output shafts available for all frame sizes in specified diameters.

Output Flange: Output flanges for hollow shaft with flange configurations.

Torque Arm: Torque arm assemblies for shaft-mounted installations requiring reaction force absorption.

Dust Cover: Protective dust covers for output shaft sealing against environmental contamination.

Installation Methods

Foot-Mounted Configuration

Foot-mounted installation provides base mounting option with integrated mounting feet. This configuration enables installation on horizontal surfaces, equipment frames, or foundation structures.

Flange-Mounted Configuration

Flange-mounted installation utilizes output flange or mounting flange for direct attachment to equipment. This method eliminates separate mounting base requirements, enabling compact installation where space is constrained.

Lubrication Systems

Grease Lubrication

Grease lubrication option provides sealed lubrication suitable for specific installation orientations or applications requiring maintenance-free operation. Grease-packed gears eliminate oil level monitoring requirements.

Oil-Bath and Splash Lubrication

Oil-bath and splash lubrication methodology distributes lubricant through gear rotation. Rotating gears splash oil throughout the gear chamber, providing continuous lubrication to gear meshing surfaces and bearing locations.

Cooling Method

Natural Cooling

Heat dissipation occurs through natural cooling from the housing surfaces. Aluminum alloy construction in smaller frame sizes (KM050-KM090) provides enhanced thermal conductivity. Gray cast iron housing in KM110 facilitates heat transfer through natural convection and radiation.

Surface Treatment and Painting

Aluminum Alloy Gearbox Finishing Process

Aluminum alloy gearboxes (KM050-KM090) undergo comprehensive surface treatment:

Shot Blasting: Initial surface preparation through shot blasting removes surface imperfections and creates uniform surface texture.

Anticorrosion Treatment: Protective anticorrosion treatment prevents oxidation and corrosion during operation and storage.

Phosphating: Chemical phosphating process creates conversion coating enhancing paint adhesion and corrosion resistance.

Painting: Final coating applied in RAL5010 Blue or RAL7035 Silver Gray color, providing durable protective finish and professional appearance.

Comparison with RV Series

The KM Series offers several advantages compared to RV series worm gearboxes:

Efficiency Advantage: KM series efficiency exceeding 90% provides 10%-40% improvement over RV series worm gear efficiency. This efficiency difference reduces heat generation and energy consumption.

Gear Strength: Hardened helical and hypoid bevel gears with 58-62 HRC surface hardness exceed RV series worm gear strength characteristics, contributing to extended service life.

Mounting Compatibility: Interchangeable mounting dimensions (except KM050/RV050) enable direct replacement in existing installations, facilitating efficiency upgrades without equipment modification.

Application Versatility: The high efficiency and right angle drive configuration enable KM series deployment across wide applications previously utilizing RV series worm gearboxes.

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Quick Specifications Reference

Parameter	Specification
Torque Range	130 ~ 750 N·m
Reduction Stages	2-Stage, 3-Stage
Ratio Range	7.5 ~ 300
Output Speed	4.6 ~ 187 r/min (at 1400 r/min input)
Efficiency	Over 90%
Housing Material	KM050-KM090: Aluminum Alloy ADC12<br>KM110: Gray Cast Iron
Gear Type	Helical & Hypoid Bevel
Gear Material	20CrMnTi Steel
Gear Hardness	58-62 HRC
Drive Configuration	Right Angle
Input Options	AC Motor, Brake Motor, DC Motor, Servo Motor<br>Hollow Shaft (IEC B5/B14, NEMA, Servo Flange)<br>Solid Shaft Input
Output Options	Keyed Hollow Shaft<br>Hollow Shaft with Output Flange<br>Plug-in Solid Shaft
Mounting Types	Foot-Mounted, Flange-Mounted
Lubrication	Grease or Oil-bath & Splash
Cooling	Natural Cooling
Surface Finish	Shot Blasted, Anticorrosion Treated, Phosphated<br>RAL5010 Blue or RAL7035 Silver Gray
RV Compatibility	Mounting dimensions compatible (except KM050)
Spare Parts	Output Shaft, Output Flange, Torque Arm, Dust Cover

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