Product Description

GRC Aluminum alloy bellows clamping coupling

Description of GRC Aluminum alloy bellows clamping coupling
>The material is aluminum alloy, and the middle bellows is made of stainless steel with excellent corrosion resistance
>Laser welding is used between bellows and shaft sleeve, with zero rotation clearance, suitable for CHINAMFG and reverse rotation
>Bellows structure can effectively compensate radial, angular and axial deviation
>Designed for servo motor stepper motor
>Fastening method of clamping screw
 

Dimensions of GRC Aluminum alloy bellows clamping coupling

model parameter	common bore diameter d1,d2	ΦD	L	L1	L2	L3	N	F	M	tightening screw torque (N.M)
GRC-16×27	4,5,6,6.35,7,8	16	27	7.5	2	8	13.5	3	M2.5	1
GRC-20×32	5,6,6.35,7,8,9,9.525,10	20	32	7.2	2.8	12	18	3.5	M3	1.5
GRC-22.5×34	5,6,6.35,7,8,9,9.525,10,11,12	22.5	34	8.05	2.8	12.3	20.2	4.5	M3	1.5
GRC-25×37	6,6.35,7,8,9,9,9.525,10,12	25	37	9.5	3	12	20.2	4.5	M3	1.5
GRC-32×42	8,9,9.525,10,11,12,12.7,14,15	32	42	8	4	18	27.2	5.5	M4	2.5
GRC-40×55	8,9,9.525,10,11,12,12.7,14,15,16,17,18,19,20	40	55	11.5	6	20	34.5	6.5	M5	7
GRC-55×72	10,11,12,12.7,14,15,16,17,18,19,20,22,24,25	55	72	16.5	6	27	51.9	10	M6	12
GRC-65×81	10,11,12,12.7,14,15,16,17,18,19,20,22,24,25,28,30,32,35,38	65	81	19.5	7	28	60.5	10.5	M6	12

model parameter	Rated torque (N.M)*	allowable eccentricity (mm)*	allowable deflection angle (°)*	allowable axial deviation (mm)*	maximum speed rpm	static torsional stiffness (N.M/rad)	moment of inertia (Kg.M2)	Material of shaft sleeve	surface treatment	weight (g)
GRC-16×27	0.8	0.1	1.5	+ 0.4 -1.2	9400	150	8.0×10-7	High strength aluminum alloy	Anodizing treatment	8
GRC-20×32	1.5	0.15	2	+ 0.6 -1.8	7600	220	2.2×10-6			13
GRC-22.5×34	1.8	0.15	2	+ 0.6 -1.8	6000	300	6.5×10-6			22
GRC-25×37	2.0	0.15	2	+ 0.8 -1.8	6100	330	6.9×10-6			30
GRC-32×42	2.5	0.2	2	+ 0.8 -2.5	4700	490	2.1×10-5			53
GRC-40×55	6.4	0.2	2	+ 0.8 -2.5	4200	530	2.3×10-5			97
GRC-55×72	12	0.2	2	+ 0.8 -2.5	3900	860	3.7×10-5			200
GRC-65×81	18	0.2	2	+ 0.7 -2.5	3500	900	3.6×10-5			380

 

 

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What are the Maintenance Requirements for Bellows Couplings to Ensure Reliable Performance?

Proper maintenance of bellows couplings is essential to ensure their reliable performance and extend their service life. Here are some maintenance requirements and practices for bellows couplings:

• Regular Inspection: Perform routine inspections of the bellows coupling to check for any signs of wear, damage, or misalignment. Look for cracks, tears, or deformation in the bellows element, as these issues can lead to coupling failure.
• Lubrication: In most cases, bellows couplings do not require lubrication. However, some specific applications or coupling designs may benefit from periodic lubrication of the shafts. Always follow the manufacturer’s guidelines regarding lubrication, as using the wrong type of lubricant can damage the coupling.
• Keep the Coupling Clean: Ensure that the bellows coupling and its surroundings are clean and free from debris. Dirt, dust, and foreign particles can accelerate wear and reduce the coupling’s performance.
• Avoid Overloading: Do not exceed the maximum torque and speed limits specified by the manufacturer. Overloading the coupling can cause premature failure and compromise the system’s performance.
• Address Misalignment and Shaft Movement: If misalignment or shaft movement occurs during operation, identify and correct the root cause promptly. Excessive misalignment or axial motion can put extra stress on the bellows and lead to premature failure.
• Inspect Fasteners: Check and tighten the fasteners, such as set screws or clamping screws, that secure the coupling to the shafts. Loose fasteners can cause the coupling to slip or shift, affecting its performance.
• Replace Damaged Couplings: If any signs of damage or wear are detected during inspection, replace the bellows coupling with a new one. Continuing to use a damaged coupling can result in catastrophic failure and potential damage to connected machinery.
• Follow Manufacturer’s Guidelines: Always follow the maintenance instructions provided by the coupling manufacturer. They may have specific recommendations for inspection intervals, cleaning methods, and other maintenance practices.

By following these maintenance practices, you can ensure that your bellows couplings remain in good condition and deliver reliable performance throughout their operational life. Regular inspections and proactive maintenance help identify potential issues early, allowing you to take corrective actions before they escalate into more significant problems.

How do bellows couplings ensure torque transmission and minimize backlash in precision systems?

Bellows couplings are used in precision systems to transmit torque between two shafts while minimizing backlash, which is crucial for maintaining accurate positioning and reducing vibrations. Here’s how they achieve these functions:

1. Torsional Rigidity: Bellows couplings are designed with a series of flexible metal convolutions (bellows) that allow angular misalignment between the shafts. The metal bellows provide high torsional rigidity, ensuring efficient torque transmission from one shaft to the other with minimal power loss.
2. Backlash Elimination: Backlash is the play or movement that occurs when reversing the direction of rotation in a mechanical system. Bellows couplings are ideal for precision applications because they have virtually zero backlash. The absence of backlash helps maintain accurate positioning and prevents undesired movements in precision machinery.
3. Compensation for Misalignment: In precision systems, shaft misalignments can occur due to manufacturing tolerances, thermal expansion, or other factors. Bellows couplings can accommodate angular, axial, and parallel misalignments, ensuring smooth operation and preventing excessive stress on the shafts and connected components.
4. Vibration Damping: The flexible nature of bellows couplings also provides some level of vibration damping. This feature helps reduce vibrations and shocks in the system, which is especially important in sensitive precision equipment to maintain stability and accuracy.
5. Compact Design: Bellows couplings are compact and lightweight compared to some other coupling types, making them suitable for applications where space and weight restrictions are important considerations.

In summary, bellows couplings play a crucial role in precision systems by ensuring efficient torque transmission, minimizing backlash, compensating for misalignments, dampening vibrations, and providing a compact design. These features make them an excellent choice for high-precision machinery and applications where accuracy and reliability are paramount.

What are the Key Design Considerations when using Bellows Couplings for Precision Applications?

When using bellows couplings in precision applications, several key design considerations must be taken into account to ensure optimal performance and accuracy. These considerations include:

1. Torsional Stiffness: In precision applications, maintaining torsional stiffness is crucial to minimize angular deflection and maintain accurate positioning. Choose bellows couplings with high torsional stiffness to ensure precise torque transmission.
2. Backlash-Free Design: Backlash can introduce positioning errors in precision systems. Select bellows couplings with minimal or zero backlash to maintain accurate motion control.
3. Radial Runout: Ensure that the bellows coupling has low radial runout to prevent eccentricity and vibration during rotation, contributing to smoother operation.
4. Material Selection: Choose materials with excellent fatigue resistance and high strength to withstand continuous operation and provide long-lasting performance.
5. Misalignment Compensation: Evaluate the required misalignment compensation for the specific application. Bellows couplings should be capable of accommodating both angular and axial misalignments without sacrificing precision.
6. Compact Size: For applications with limited space, consider compact bellows couplings that provide high torque capacity in a small form factor.
7. Temperature and Corrosion Resistance: If the application involves extreme temperatures or harsh environments, opt for bellows couplings made from materials that offer temperature and corrosion resistance.
8. Vibration Damping: Bellows couplings with good vibration damping properties help reduce resonance and maintain system stability during high-speed operations.
9. Electrical Isolation: In precision applications with sensitive electronics, consider bellows couplings that provide electrical isolation to prevent electrical currents from passing between shafts.
10. Customization: Some precision applications may require tailored solutions. Collaborate with coupling manufacturers to explore custom designs that meet specific requirements.

By carefully considering these design aspects, engineers can select the appropriate bellows coupling that aligns with the precision application’s needs, ensuring accurate motion control, reliability, and enhanced performance.

editor by CX 2024-05-15