Product Description

Item No.	φD	L	L1	L2	M	Tighten the strength(N.m)
SG7-6-40-	40	55	19	24	M3	3
SG7-6-55-	55	65	22	31	M4	6
SG7-6-65-	65	76	27	37	M5	8
SG7-6-82-	82	88	32	41	M6	10
SG7-6-90-	90	88	32	41	M6	12

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Item No.	Rated torque	Maximum Torque	Max Speed	Inertia Moment	N.m rad	RRO	Tilting Tolerance	End-play	Weight:(g)
SG7-6-40-	13N.m	26N.m	8000prm	9×10-5kg.m²	15×103N.m/rad	0.15mm	2c	1mm	231
SG7-6-55-	28N.m	56N.m	6000prm	2.9×10-4kg.m²	28×103N.m/rad	0.2mm	2c	1.5mm	485
SG7-6-65-	60N.m	120N.m	5000prm	4.6×10-4kg.m²	55×103N.m/rad	0.25mm	2c	1.5mm	787
SG7-6-82-	150N.m	300N.m	4500prm	1.1×10-3kg.m²	110×103N.m/rad	0.28mm	2c	1.5mm	1512
SG7-6-90-	200N.m	400N.m	4000prm	2×10-3kg.m²	140×103N.m/rad	0.3mm	2c	1.5mm	1800

How to Properly Install a Rigid Shaft Coupling for Optimal Performance and Reliability

Proper installation of a rigid shaft coupling is essential to ensure optimal performance and reliability in mechanical systems. Here are the steps to follow for a successful installation:

1. Shaft Preparation: Ensure that the shafts to be connected are clean, smooth, and free from any burrs or contaminants that could affect the coupling’s performance.
2. Alignment: Align the two shafts accurately to minimize misalignment during installation. The alignment process is critical as any misalignment can lead to premature wear and reduced coupling efficiency.
3. Fitment: Choose the appropriate size of the rigid shaft coupling that matches the shaft diameters. Carefully slide the coupling onto one shaft at a time.
4. Fastening: For one-piece rigid couplings, ensure that the coupling is fitted snugly onto both shafts. For two-piece couplings, bolt the two halves together securely around the shafts.
5. Tightening: Use the recommended torque value and follow the manufacturer’s guidelines to tighten the coupling bolts properly. Over-tightening can cause distortion, while under-tightening can lead to slippage and reduced torque transmission.
6. Inspection: After installation, inspect the coupling to ensure that it is centered and aligned correctly. Check for any signs of misalignment or interference during rotation.
7. Lubrication: Some rigid couplings may require lubrication at the friction points to reduce wear and friction. Follow the manufacturer’s recommendations for lubrication intervals and types.
8. Load Testing: Perform load testing on the system to verify the coupling’s performance and check for any unusual vibrations or noises during operation.
9. Regular Maintenance: Include the rigid coupling in your regular maintenance schedule. Periodically check for signs of wear, misalignment, or damage, and replace the coupling if necessary.

By following these installation steps and best practices, you can ensure that the rigid shaft coupling operates optimally, providing reliable torque transmission and contributing to the overall efficiency and longevity of the mechanical system.

What design considerations are crucial when selecting a rigid shaft coupling for a specific application?

Selecting the right rigid shaft coupling for a specific application involves careful consideration of several design factors to ensure optimal performance and reliability. Here are crucial design considerations to keep in mind:

• Torque Transmission: Determine the maximum torque that the coupling needs to transmit. The coupling’s torque rating should match or exceed the application’s requirements to prevent overloading.
• Shaft Size and Type: Choose a coupling that accommodates the shaft sizes and types of the connected equipment. The coupling’s bore sizes should match the shaft diameters for a secure fit.
• Alignment Capability: Consider the alignment accuracy needed for your application. Rigid couplings offer excellent alignment, but some applications might require higher precision than others.
• Space Constraints: Evaluate the available space around the coupling area. Some couplings might have a compact design suitable for tight spaces, while others might require more clearance.
• Environmental Conditions: Assess the operating environment for factors such as temperature, humidity, and presence of corrosive substances. Choose a coupling with appropriate materials and coatings for durability in the given conditions.
• Shaft Misalignment: Determine the potential misalignments the coupling will need to accommodate. While rigid couplings have limited flexibility, they can handle small misalignments. Consider whether angular or axial misalignments are more significant in your application.
• Operating Speed: Evaluate the rotational speed of the machinery. Some couplings have speed limits, and exceeding these limits can lead to vibrations and premature wear.
• Dynamic Loads: Consider any dynamic loads, shocks, or impacts that the coupling might experience during operation. Choose a coupling that can handle these loads without failure.
• Torsional Rigidity: High torsional rigidity ensures efficient torque transmission and minimizes torsional vibrations. Evaluate whether the coupling’s stiffness aligns with your application’s requirements.
• Attachment Method: Determine how the coupling will be attached to the shafts. Different couplings use set screws, clamps, keyways, or other attachment methods. Select a method that suits your application’s needs.
• Cost Considerations: Balance the desired features with your budget. While more advanced couplings might offer additional benefits, they could also be more expensive.

It’s important to collaborate with coupling manufacturers, engineers, or experts to ensure the selected coupling aligns with the specific demands of your application. Coupling suppliers can provide valuable guidance based on their product knowledge and experience with various applications.

By carefully evaluating these design considerations, you can select a rigid shaft coupling that delivers reliable performance, reduces maintenance needs, and contributes to the overall efficiency of your machinery.

Advantages of Rigid Shaft Couplings Compared to Other Coupling Types

Rigid shaft couplings offer several advantages over other types of couplings, making them suitable for specific applications where these characteristics are essential:

• Efficient Torque Transmission: Rigid couplings provide a direct and efficient transfer of torque from one shaft to another, minimizing power loss and maximizing the system’s overall efficiency.
• Precision and Accuracy: Due to their solid and inflexible design, rigid shaft couplings maintain precise shaft alignment, ensuring accurate and consistent performance in precision machinery and instruments.
• High Torque and Speed Capacity: Rigid couplings can handle high torque loads and high-speed applications without significant wear or fatigue, making them suitable for heavy-duty industrial systems.
• Simple Design: Rigid couplings have a straightforward design, consisting of few components, which makes them easy to install, inspect, and maintain.
• No Backlash: Since rigid couplings do not have any flexibility or play, they do not introduce backlash into the system, providing precise and immediate responsiveness to changes in torque and speed.
• Cost-Effectiveness: Rigid shaft couplings are generally more affordable than some of the more complex flexible coupling types, making them a cost-effective solution for applications with minimal shaft misalignments.
• High Temperature and Corrosion Resistance: Depending on the material used, rigid couplings can offer high-temperature resistance and corrosion resistance, making them suitable for harsh environments.
• Stability and Reliability: Rigid couplings provide a stable and reliable connection between shafts, reducing the risk of failure or breakdown in critical systems.

Despite their advantages, rigid couplings are not suitable for applications where shaft misalignment or shock absorption is a concern. In cases where misalignment is expected or where some degree of flexibility is required to protect the system from shocks and vibrations, flexible coupling types such as beam couplings, bellows couplings, or jaw couplings are more appropriate choices.

editor by CX 2023-09-04