Product Description

Item No.	φD	L	L1	L2	L3	S	M	Tighten the strength(N.m)
SG7-10-14-	15	20	6	6	3	1	M3	1
SG7-10-25-	26	26	8	8	4	1	M4	1.5
SG7-10-30-	32	32	10	9	5	1.5	M4	1.7
SG7-10-40-	40	50	17	12	8.5	2	M5	4
SG7-10-55-	56	58	20	14	10	2	M5	4
SG7-10-65-	66	62	21	15	10.5	2.5	M8	15
SG7-10-80-	82	86	31	18	15.5	3	M8	15
SG7-10-95-	98	94	34	20	17	3	M8	15
SG7-10-108-	108	123	46	24	23	3.5	M8	15

1111

Item No.	Rated torque	Maximum Torque	Max Speed	Inertia Moment	N.m rad	RRO	Tilting Tolerance	End-play	Weight:(g)
SG7-10-14-	1.1N.m	2.2N.m	19000prm	3.9×10-4kg.m²	45N.m/rad	0.02mm	1.0c	+0.6mm	20
SG7-10-25-	6.0N.m	12N.m	16000prm	6.8×10kg.m²	56N.m/rad	0.02mm	1.0c	+0.6mm	25
SG7-10-30-	6.5N.m	13N.m	15000prm	8.3×10kg.m²	70N.m/rad	0.02mm	1.0c	+0.6mm	46
SG7-10-40-	32N.m	64N.m	13000prm	9.3×10kg.m²	490N.m/rad	0.02mm	1.0c	+0.8mm	135
SG7-10-55-	46N.m	92N.m	10500prm	3.8×10-3kg.m²	1470N.m/rad	0.02mm	1.0c	+0.8mm	300
SG7-10-65-	109N.m	218N.m	8300prm	8×10kg.m²	2700N.m/rad	0.02mm	1.0c	+0.8mm	570
SG7-10-80-	135N.m	270N.m	7000prm	1.5×10-2kg.m²	3100N.m/rad	0.02mm	1.0c	+1.0mm	910
SG7-10-95-	260N.m	520N.m	6000prm	1.9×10kg.m²	4400N.m/rad	0.02mm	1.0c	+1.0mm	1530
SG7-10-108-	430N.m	860N.m	5000prm	3×10kg.m²	5700N.m/rad	0.02mm	1.0c	+1.0mm	2200

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How does a spider coupling compare to other types of couplings, such as jaw couplings or gear couplings?

Spider couplings, jaw couplings, and gear couplings are all commonly used in mechanical systems for power transmission and misalignment compensation. Each type of coupling has its own unique characteristics and advantages. Here’s a comparison:

• Spider Couplings: Spider couplings, also known as flexible couplings or jaw/spider couplings, use an elastomeric spider to transmit torque and accommodate misalignment. They are known for their flexibility, vibration dampening, and ability to handle angular, radial, and axial misalignment. Spider couplings are suitable for a wide range of applications and are cost-effective solutions for moderate torque requirements and misalignment compensation.
• Jaw Couplings: Jaw couplings consist of two hubs with curved jaws that interlock and transmit torque. They are simple to install and provide a secure connection. However, jaw couplings are less effective in accommodating misalignment compared to spider couplings. They are suitable for applications with minimal misalignment and moderate torque transmission.
• Gear Couplings: Gear couplings use toothed gears to transmit torque between shafts. They are robust and capable of transmitting high torque while accommodating some misalignment. Gear couplings are often used in heavy-duty applications that require precise torque transmission and can tolerate limited misalignment.

When comparing these couplings, spider couplings stand out for their versatility in handling various types of misalignment and providing vibration dampening. Jaw couplings are simpler and suitable for applications with minimal misalignment, while gear couplings excel in heavy-duty applications with high torque requirements. The choice between these couplings depends on the specific requirements of the application, including torque, misalignment compensation, space limitations, and cost considerations.

Can you explain the concept of torsional stiffness in relation to spider couplings?

Torsional stiffness is a crucial concept in the design and functionality of spider couplings. It refers to the ability of a coupling to resist rotational deformation (twisting) when subjected to a torque load. In other words, torsional stiffness measures how much a coupling can maintain its shape and transmit torque without excessive twisting or deformation.

In the context of spider couplings:

• High Torsional Stiffness: A coupling with high torsional stiffness exhibits minimal angular deflection or twisting when torque is applied. This ensures accurate torque transmission and precise alignment between connected shafts. High torsional stiffness is especially important in applications that require accurate positioning and synchronization.
• Low Torsional Stiffness: A coupling with low torsional stiffness allows for some degree of angular misalignment between shafts and can accommodate slight variations in torque load. This flexibility can be advantageous in applications where misalignment or shock absorption is necessary.

When selecting a spider coupling for a specific application, the torsional stiffness of the coupling needs to be considered based on the requirements of the machinery system. The choice between high and low torsional stiffness depends on factors such as the level of precision needed, the type of load, the degree of misalignment, and the overall performance objectives.

It’s important to note that while torsional stiffness is a key consideration, other factors like the material of the elastomeric spider, size of the coupling, and the type of spider profile also play a role in the coupling’s overall performance and behavior.

How do you properly install and maintain a spider coupling in machinery?

Installation:

Proper installation of a spider coupling is essential to ensure its optimal performance and longevity. Here are the steps for installing a spider coupling:

1. Ensure Safety: Before starting any installation, make sure the machinery is properly shut down and all energy sources are disconnected.
2. Inspect Components: Check the hubs, elastomeric spider, and shafts for any damage or debris. Ensure that the components match the correct specifications.
3. Align Shafts: Align the shafts to minimize initial misalignment before inserting the elastomeric spider.
4. Insert Spider: Place the elastomeric spider into one of the hubs, ensuring that the lobes or fins are correctly aligned with the grooves in the hub.
5. Align Second Hub: Carefully align the second hub with the first one, making sure the spider lobes fit into the grooves of both hubs.
6. Press Hubs Together: Gently press the hubs together until they meet. Avoid using excessive force, as this could damage the elastomeric spider.
7. Check Alignment: After installation, check the alignment of the shafts and the coupling. Misalignment should not exceed the manufacturer’s recommended limits.
8. Tighten Fasteners: Tighten the fasteners on the hubs according to the manufacturer’s torque specifications. Use a torque wrench to ensure proper tightening.
9. Verify Clearance: Check for proper clearance between the coupling and surrounding components to prevent interference during operation.
10. Run System: Start the machinery and monitor the coupling for any unusual vibrations or noise. Make any necessary adjustments if issues are detected.

Maintenance:

Maintaining a spider coupling is important to ensure its continued performance and prevent premature failure. Here are some maintenance tips:

• Regular Inspection: Periodically inspect the spider coupling for signs of wear, damage, or deterioration. Look for cracks, tears, or other abnormalities in the elastomeric spider.
• Clean Environment: Keep the coupling and surrounding area clean from dirt, debris, and contaminants that could impact its performance.
• Lubrication: Spider couplings are self-lubricating due to the elastomeric material. Avoid using additional lubricants, as they can deteriorate the elastomeric properties.
• Temperature Consideration: Be aware of the temperature range specified by the manufacturer for the elastomeric material. Extreme temperatures can affect the performance and lifespan of the coupling.
• Replace Worn Parts: If the elastomeric spider shows signs of wear, replace it with a new one from the manufacturer. Do not continue using a worn or damaged spider.
• Monitor Vibrations: Regularly monitor the machinery for unusual vibrations or noise, as these can indicate issues with the coupling. Address any problems promptly.
• Follow Manufacturer Guidelines: Adhere to the manufacturer’s recommended maintenance schedule and guidelines for the specific spider coupling model.

Proper installation and regular maintenance contribute to the reliable and efficient operation of a spider coupling in machinery.

editor by CX 2023-12-27