Polyurethane (PU) Elastomeric Couplings

Flexible shaft couplings for mechanical power transmission and misaligned shaft connections

LPR Global is a supplier of CE ATEX (II2GD c T5) certified elastomeric couplings designed to tackle tough environments for various applications. Since 1999, our Polyurethane (PU) based flexible couplings have been extensively tested for quality and favored by our clients for flexibility, durability, simple installation and maintenance.

 

Capable of absorbing impact, twists, abrasions and withstanding even the harshest hot and humid conditions, our elastomeric couplings will provide a solution to fit your needs.

 

Reduce maintenance costs while improving productivity with our all-purpose couplings that feature a split-in-half element, interchangeable hubs with simple installation and maintenance procedures.

Motion Control Shaft Couplings with Material-Flexing Polyurethane Element

 

We provide flexible bonded polyurethane couplings with a split tire design for simple installation and maintenance. Manufactured in Korea with over 20 years of experience, our elastomeric couplings are in use in over 28 countries. Since 1999, our flexible shaft couplings have gone through numerous quality improvements to enhance the bonded polyurethane strength to satisfy the coupling requirements for today’s demanding applications in various industries.

Flexible Mechanical Couplings | Applicable industries and applications

  • Steel Industry

  • Automotive Industry
  • Food Processing Industry
  • Power and Energy
  • Aerospace Industry
  • Oil and Gas Industry
  • Mining Industry
  • Pulp and Paper Mill
  • Brewery and Distilling
  • Industrial Agitators
  • Fans and Blowers
  • Compressors
  • Conveyors
  • Cranes and Hoists
  • Elevators
  • Generators
  • Pumps
  • Brewery and Distilling
Coupling Certification

Polyurethane (PU) based Elastomeric Coupling Advantages

  • Simple Installation
    Easy assembly without moving driven motor or connected hubs
  • Simple Maintenance
    No need for any lubrication, oil or grease and easily interchangeable parts in the field
  • Flexibility
    Great misalignment capability and torsionally soft
  • Better Protection
    Longer driven equipment life made possible by excellent vibration damping, shock absorption capabilities
Elastomeric Coupling

Heavy Duty Flexible Shaft Coupling Features

  • Designed for hot and humid environments with superior materials
  • ATEX Group 2 certified for protection against explosive atmospheres
  • High parallel (up to 4 degrees) and angular misalignment (up to 3.2 mm) capability
  • Facility protection for twirl, twist, impact, and abrasion
  • Torque ratings (up to 6.4 kNm) and torsional stiffness are higher than the standard couplings
  • Simple and easy replacement without the separation of motor or connected shafts due to its simple split-in-half structure and no oil or grease required
  • Accommodates shaft diameters from 10 mm to 165 mm
  • Possible for the dissimilar connection and assembly with the same hub
  • Polyurethane based for good water and chemical resistance
  • Noise dampening

Standard type

Premium Coupling

Spacer type

Premium Spacer Coupling

Standard Elastomeric Flexible Shaft Coupling
Features

  • Facility protection for twirl, twist, impact, and abrasion
  • High parallel (up to 4 degrees) and angular misalignment (up to 4.8mm) capability
  • Simple and easy installation and maintenance without any oil or grease
  • Very simple replacement without the separation of motor or connector on the related line due to its simple split-in-half structure
  • Torque rating up to 19 kNm
  • Shaft diameters from 28 mm to 190 mm
  • Possible for the dissimilar connection and assembly with the same hub
  • Polyurethane based for greater water and chemical resistance
  • Noise dampening
Dynamic Coupling Types

HT Type Coupling
for high torque and torsional stiffness

  • HT coupling boasts torque ratings that are approximately 30% higher with torsional stiffness 45% higher than standard couplings
  • Simple assembly and disassembly
  • User-friendly interchangeable with existing hubs
High Torque Coupling

HS Type Coupling
for hot and humid conditions

  • Developed for hot and humid conditions with superior strength than standard couplings
  • Simple assembly and disassembly
  • User-friendly interchangeable with existing hubs
  • Materials hydrolytically stable
Hot Conditions Coupling

Elastomeric Shaft Coupling Advantages for Power Transmission Requirements

In various industries from oil and gas, steel, agriculture and mining, traditional gear couplings have been used to connect one rotating shaft to another for power transmission. Gear couplings were simple, yet cumbersome to maintain for two main reasons.

 

By design, gear couplings will not function properly without proper lubrication and regular preventive maintenance. Without regular maintenance procedures, gear couplings will eventually drift to increase misalignments as it does not absorb the vibrations of the powered components. Also, with its rigid and unforgiving structure, when gear couplings malfunction, it does not protect the connected equipment causing damage or unnecessary wear and tear to connected powered components.

 

A flexible shaft coupling, such as the elastomeric coupling was designed with polyurethane component to eliminate these problems associated with power transmitting shaft couplings. Due to the elastomer component of the coupling, no lubricant is ever required. The flexible nature of the couplings can withstand the stop and go pressure of the connected shafts while also compensating for misalignments in the shaft ends at the same time.

 

Flexible elastomeric couplings also provide a safe breaking point that saves costly repairs to your connected system components. In cases of severe torque overload, the elastomer component will serve as a break point before causing costly damages to other expensive parts in the drive train. With its split-in-half design, the coupling then can be easily replaced, causing minimal downtime to your manufacturing plant.

 

With multiple cover options ranging from high torque, high humidity, chemical resistance, and varying torsional stiffness, elastomeric couplings can provide a predictable solution for your power transmission requirements.

Shaft Coupling Line Up

Installation Steps

Step 1

Coupling Install Hub
  • Inspect both shafts (driven & driving) and hub bores and comfirm they are clean with no dirty particle or burrs.
  • Be sure the keys fit shafts properly
  • Mount both hubs to the shafts securing only one hub while the other side hub should be loose for minor adjustment of spacing
  • In case tapered is being used, follow bushing manufacturer’s instructions
  • If hub is bored for an interference fit, we recommend heating the hub in water or oil bath and after heating, immediately position it on the shaft
  • Be careful as spot heat may cause distortion

Step 2

Coupling Install Element
  • Place half of the element around hubs and secure with capscrews provided
  • The element will space the other hub. It is important to have the capscrews properly tightened
  • For proper placement of capscrews, see Table 1 below for recommended capscrew torques and instructions
  • Now secure the other hub to the shaft

Step 3

Coupling Install Complete
  • Mount other half of the element to hubs
  • Tighten all capscrews

*Above shown Spacer Type coupling installation; the same procedure applies for the standard, HT, and HS type couplings

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