Product Description

SDSX Grooved Rigid Coupling

Systems & Performance

SDSX Grooved mechanical couplings(GMC) are available in both rigid and flexible models.

A rigid coupling is used in applications where a rigid joint is desired,similar to that of a traditional flanged,welded ,or threaded connection.

To be considered rigid,a coupling would allow less than 1 degree of deflection or angular movement

 

Description

SDSX rigid coupling is designed from 1″-12″, and pressure is 300psi/2070 kPa.

Bolts/Nuts: Heat-treated plated carbon steel, meeting its mechanical properties Grade 8.8.

Gaskets: EPDM, silicon rubber and Nitrile rubber.

Dimensions
 

Nominal
Size mm/in
Pipe O.D
mm/in
Working
Pressure
PSI/MPa
Bolt Size Dimensions mm/in
No.-Size   mm Ø L H
25
1
33.7
1.327
300
2.07
2-3/8*45 60   
2.362
102 
4.016
45 
1.772
32
42.4
1.669
300
2.07
2-3/8*45 70 
2.756
106 
4.173
44 
1.732
40
48.3
1.900
300
2.07
2-3/8*45 73 
2.874
108 
4.252
44 
1.732
50
2
57.0
2.245
300
2.07
2-3/8*55 83
3.268
122 
4.803
45 
1.772
50
2
60.3
2.375
300
2.07
2-3/8*55 87
3.425
123 
4.843
44 
1.732
65
73.0
2.875
300
2.07
2-3/8*55 100 
3.937
138 
5.433
44 
1.732
65
76.1
3.000
300
2.07
2-3/8*55 103 
4.055
142 
5.591
45 
1.772
80
3
88.9
3.500
300
2.07
2- 1/2*60 117 
4.606
166 
6.535
45 
1.772
100
4
108.0
4.250
300
2.07
2- 1/2*65 137 
5.393
188 
7.401
48 
1.889
100
4
114.3
4.500
300
2.07
2- 1/2*65 139 
5.472
190 
7.480
49 
1.929
125
5
133.0
5.250
300
2.07
2- 1/2*75 163 
6.417
210 
8.268
49 
1.929
125
5
139.7
5.500
300
2.07
2- 1/2*75 168 
6.614
218 
8.583
49 
1.929
150
6
159.0
6.250
300
2.07
2- 1/2*75 192 
7.559
242 
9.528
49 
1.929
150
6
165.1
6.500
300
2.07
2- 1/2*75 193 
7.598
241 
9.488
49 
1.929
150
6
168.3
6.625
300
2.07
2- 1/2*75 198.5 
7.815
249 
9.803
50
1.969
200
8
219.1
8.625
300
2.07
2-5/8*85 253 
9.961
320 
12.598
59
2.323
250
10
273
10.748
300
2.07
2-7/8*130 335 
13.189
426 
16.772
68
2.677
300
12
323.9
12.752
300
2.07
2-7/8*130 380 
14.96
470 
18.504
65
2.559

Material Specification

Housing: Ductile iron conforming to ASTM A-536, grade 65-45-12.

Housing Coating: Paint red and orange

• Optional: Hot dipped galvanized, electro galvanized.

Gaskets

 

• EPDM: Temperature range -34ºC to +150ºC. Recommended for hot water service within

the specified temperature range plus a variety of dilute acids,oil-free air and many chemical services.
 

NOT RECOMMENDED FOR PETROLEUM SERVICES.

 

• Silicon Rubber: Temperature range -40ºC to +177ºC. Recommended for drinking water,

hot water, high-temperature air and some high-temperature chemicals.

NOT RECOMMENDED FOR PETROLEUM SERVICES.

 

• Nitrile Rubber: Temperature range -29ºC to +82ºC. Recommended for petroleum products,

air with oil vapors, vegetable and mineral oils within the specified temperature range.

NOT RECOMMENDED FOR HOT WATER

SERVICES OVER +150°F/+66ºC OR FOR HOT

DRY AIR OVER +140°F/+60ºC.

Installation

Certification



Showroom

Application

Package and shipment

Production and quality control


 

rigid coupling

How Do Rigid Couplings Compare to Other Types of Couplings in Terms of Performance?

Rigid couplings offer specific advantages and disadvantages compared to other types of couplings, and their performance depends on the requirements of the application:

1. Performance: Rigid couplings provide excellent torque transmission capabilities and are best suited for applications that demand precise and efficient power transfer. They have minimal backlash and high torsional stiffness, resulting in accurate motion control.

2. Misalignment Tolerance: Rigid couplings cannot tolerate misalignment between shafts. They require precise shaft alignment during installation, which can be time-consuming and may result in increased downtime during maintenance or repairs.

3. Vibration Damping: Rigid couplings offer no damping of vibrations, which means they may not be suitable for systems that require vibration isolation or shock absorption.

4. Maintenance: Rigid couplings are generally low maintenance since they have no moving parts or flexible elements that can wear out over time. Once properly installed, they can provide reliable performance for extended periods.

5. Space Requirements: Rigid couplings are compact and do not add much length to the shaft, making them suitable for applications with limited space.

6. Cost: Rigid couplings are usually more economical compared to some advanced and specialized coupling types. Their simpler design and lower manufacturing costs contribute to their affordability.

7. Application: Rigid couplings are commonly used in applications where shafts are precisely aligned and no misalignment compensation is necessary. They are prevalent in precision machinery, robotics, and applications that require accurate motion control.

In contrast, flexible couplings, such as elastomeric, jaw, or beam couplings, are designed to accommodate misalignment, dampen vibrations, and provide some degree of shock absorption. Their performance is ideal for systems where shafts may experience misalignment due to thermal expansion, shaft deflection, or dynamic loads.

In summary, rigid couplings excel in applications that demand precise alignment and high torque transmission, but they may not be suitable for systems that require misalignment compensation or vibration damping.

rigid coupling

Use of Rigid Couplings for Motor-to-Shaft and Shaft-to-Shaft Connections

Yes, rigid couplings can be used for both motor-to-shaft and shaft-to-shaft connections in mechanical systems. Rigid couplings are designed to provide a solid and non-flexible connection between two shafts. This characteristic makes them versatile for various applications, including motor-to-shaft and shaft-to-shaft connections.

1. Motor-to-Shaft Connections: In motor-to-shaft connections, a rigid coupling is used to connect the output shaft of an electric motor to the driven shaft of a machine or equipment. This ensures direct power transmission without any flexibility. Motor-to-shaft connections are common in applications where the motor’s rotational motion needs to be transferred to the driven equipment with high precision and efficiency.

2. Shaft-to-Shaft Connections: In shaft-to-shaft connections, a rigid coupling joins two shafts directly, providing a solid and immovable link between them. This is beneficial in applications where precise alignment and torque transmission are essential, such as in precision motion control systems or heavy-duty industrial machinery.

Rigid couplings are available in various designs, such as one-piece, two-piece, and split types, to accommodate different shaft arrangements. The type of rigid coupling used depends on the specific application and the shaft sizes to be connected.

Advantages of Using Rigid Couplings:

– Zero backlash ensures accurate motion transfer and positioning.

– Efficient power transmission without loss due to flexibility.

– Minimal maintenance requirements due to their simple design.

– High torque capacity suitable for heavy-duty applications.

– Tolerance to misalignment (within design limits) enhances versatility.

– Provides system stiffness, reducing the risk of resonance and vibration-related issues.

– Suitable for high-speed applications.

– Versatility for various industrial applications.

Whether it’s connecting a motor to a driven shaft or joining two shafts together, rigid couplings offer reliability, precision, and efficiency, making them a popular choice in numerous mechanical systems.

rigid coupling

What is a Rigid Coupling and How Does it Work?

A rigid coupling is a type of mechanical coupling used to connect two shafts together at their ends to transmit torque and rotational motion without any flexibility or misalignment accommodation. Unlike flexible couplings, rigid couplings do not allow for angular, parallel, or axial misalignment between the shafts. The main purpose of a rigid coupling is to provide a strong and solid connection between two shafts, ensuring precise and synchronous power transmission between them.

Structure and Design:

Rigid couplings are typically made from durable materials such as steel, stainless steel, or aluminum, which can withstand high torque and load applications. The coupling consists of two halves, each with a cylindrical bore that fits tightly onto the respective shafts. The two halves are then fastened together using bolts or set screws to ensure a secure and rigid connection.

Working Principle:

The working principle of a rigid coupling is straightforward. When the two shafts are aligned precisely and the coupling is securely fastened, any torque applied to one shaft gets directly transferred to the other shaft. The rigid coupling essentially makes the two shafts act as one continuous shaft, allowing for synchronous rotation without any relative movement or play between them.

Applications:

Rigid couplings are commonly used in applications where precise alignment and torque transmission are essential. Some common applications of rigid couplings include:

  • High-precision machinery and equipment
  • Robotics and automation systems
  • Precision motion control systems
  • Machine tools
  • Shaft-driven pumps and compressors

Advantages:

The key advantages of using rigid couplings include:

  • High Torque Transmission: Rigid couplings can handle high torque and power transmission without any loss due to flexibility.
  • Precision: They provide accurate and synchronous rotation between the shafts, making them suitable for precise applications.
  • Simple Design: Rigid couplings have a simple design with minimal moving parts, making them easy to install and maintain.
  • Cost-Effective: Compared to some other coupling types, rigid couplings are generally more cost-effective.

Limitations:

Despite their advantages, rigid couplings have certain limitations:

  • No Misalignment Compensation: Rigid couplings cannot accommodate any misalignment between the shafts, making precise alignment during installation crucial.
  • Transmits Vibrations: Since rigid couplings do not dampen vibrations, they can transmit vibrations and shocks from one shaft to the other.
  • Stress Concentration: In some applications, rigid couplings can create stress concentration at the ends of the shafts.

In summary, rigid couplings are ideal for applications that require precise alignment and high torque transmission. They offer a robust and straightforward solution for connecting shafts and ensuring synchronous power transmission without any flexibility or misalignment accommodation.

China Standard FM, UL Grooved Rigid Coupling Sdsx  China Standard FM, UL Grooved Rigid Coupling Sdsx
editor by CX 2023-10-21