Product Description

GR Aluminum alloy bellows setscrew coupling

Description of   GR Aluminum alloy bellows setscrew 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 mot
 

Dimensions of  GR Aluminum alloy bellows setscrew coupling

model parameter	common bore diameter d1,d2	ΦD	L	LI	L2	L3	N	F	M	tightening screw torque (N.M)
GR-16×27	4,5,6,6.35,7,8	16	27	7.5	2	8	13.5	3	M3	0.7
GR-20×32	5,6,6.35,7,8,9,9.525,10,11,12	20	32	7.2	2.8	12	18	3.5	M3	0.7
GR-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	M4	1.7
GR-25×37	6,6.35,7,8,9,9.525,10,11,12	25	37	9.5	3	12	20.2	4.5	M4	1.7
GR-32×42	8,9,10,11,12,12.7,14,15	32	42	8	4	18	27.2	5.5	M5	4
GR-40×51	8,9,9.525,10,11,12,12.7,14,15,16,17,18,19,20	40	51	9.5	6	20	34.5	5.5	M5	4
GR-55×57	10,11,12,12.7,14,15,16,17,18,19,20,22,24,25	55	57	9	6	27	51.9	6.25	M6	7
GR-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	8.9	M6	7

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)
GR-16×27	0.8	0.1	2	+ 0.4 -1.2	20000	150	7.9×10-7	High strength aluminum alloy	Anodizing treatment	8
GR-20×32	1.5	0.1	2	+ 0.6 -1.8	18000	220	2.0×10-6			13
GR-22.5×34	1.8	0.15	2	+ 0.6 -1.8	16000	300	6.2×10-6			22
GR-25×37	2.0	0.15	2	+ 0.6 -1.8	15000	330	6.7×10-6			30
GR-32×42	2.5	0.2	2	+ 0.8 -2.5	11000	490	2.0×10-5			53
GR-40×51	6.4	0.3	2	+ 0.8 -2.5	10000	530	2.1×10-5			85
GR-55×57	12	0.3	2	+ 0.8 -2.5	9000	860	2.8×10-5			170
GR-65×81	18	0.2	2	+ 0.7 -2.5	4500	900	2.3×10-5			280

 

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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.

Can Bellows Couplings Be Used in Applications Requiring Electrical Isolation Between Shafts?

Yes, bellows couplings can be used in applications that require electrical isolation between shafts. The bellows coupling’s design inherently provides electrical isolation due to the absence of physical contact between the metal components. This feature makes bellows couplings well-suited for scenarios where electrical continuity must be maintained or prevented between the connected shafts.

In certain industrial setups, such as in motor-driven systems or equipment utilizing sensitive electronics, maintaining electrical isolation is crucial to prevent interference or electrical currents from flowing between the driving and driven shafts. In such cases, a bellows coupling acts as an ideal solution because the bellows element, made of non-conductive material, separates the two shaft ends while still transmitting torque.

Additionally, the material used for the bellows element can be selected to ensure optimal electrical insulation properties. For example, using materials like stainless steel or aluminum for the bellows ensures high electrical resistance and prevents any current leakage or conduction through the coupling.

By providing electrical isolation, bellows couplings help in safeguarding sensitive electronic components, minimizing the risk of electrical damage or interference, and ensuring the reliability and performance of the overall system.

Can you explain the Working Principle of a Bellows Coupling and its Advantages in Various Industries?

A bellows coupling is a type of flexible coupling that consists of a bellows element, which is a thin-walled, corrugated metal tube. The working principle of a bellows coupling involves utilizing the elasticity and flexibility of the bellows to transmit torque while accommodating misalignments between the driving and driven shafts.

When torque is applied to the coupling, the bellows element flexes and expands or contracts based on the rotational motion of the shafts. This flexing capability allows the coupling to compensate for angular, axial, and parallel misalignments, providing a degree of freedom for both shafts without inducing excessive stress or load on the connected machinery.

Advantages of Bellows Couplings in Various Industries:

• High Misalignment Compensation: Bellows couplings can accommodate higher misalignments compared to other coupling types, making them ideal for applications where precise alignment is challenging or where shafts may experience dynamic misalignments during operation.
• Torsional Stiffness: Some bellows coupling designs offer high torsional stiffness, ensuring efficient torque transmission and maintaining positional accuracy in motion control systems.
• Backlash-Free: Bellows couplings are typically backlash-free, meaning they have minimal play or clearance between the bellows and the coupling hubs. This characteristic is crucial in precision systems where any degree of backlash can lead to positioning errors.
• Vibration Dampening: The flexible nature of the bellows element helps dampen vibrations and shocks, reducing wear and tear on connected components and improving overall system reliability.
• Electrical Isolation: Some bellows coupling designs offer electrical isolation between the shafts, preventing the transmission of electrical currents and providing protection to sensitive electronic equipment.
• Compact Size: Bellows couplings are available in compact designs, making them suitable for applications with limited space, such as robotics, aerospace, and medical devices.
• Temperature and Corrosion Resistance: Depending on the material used, bellows couplings can exhibit excellent resistance to high temperatures and corrosion, making them suitable for harsh environments in industries like oil and gas, chemical, and marine.

Bellows couplings find applications in a wide range of industries, including robotics, automation, aerospace, medical equipment, semiconductor manufacturing, precision machinery, and more. Their ability to handle misalignments, provide backlash-free motion, and offer excellent torsional stiffness makes them a versatile and reliable choice for critical motion control systems.

editor by CX 2024-02-19