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

 

 

What Materials Are Commonly Used in Manufacturing Bellows Couplings?

Bellows couplings are manufactured using a variety of materials to suit different application requirements. The choice of material depends on factors such as the operating environment, torque and speed requirements, and the presence of any corrosive or aggressive substances. Some commonly used materials in manufacturing bellows couplings include:

• Stainless Steel: Stainless steel is a popular choice for bellows couplings due to its excellent corrosion resistance and high strength. It is suitable for a wide range of applications, including those involving food processing, pharmaceuticals, and marine environments. Stainless steel bellows couplings are durable and can withstand harsh conditions.
• Aluminum: Aluminum is known for its lightweight properties, making aluminum bellows couplings ideal for applications where reducing the overall weight is crucial. While not as corrosion-resistant as stainless steel, aluminum couplings are still suitable for many industrial settings and are often used in robotics, automation, and aerospace industries.
• Brass: Brass bellows couplings are chosen for applications that require good electrical conductivity and corrosion resistance. They are commonly used in electrical and electronic equipment, as well as in environments where brass is a preferred material for specific compatibility reasons.
• High-Temperature Alloys: For applications involving extreme temperatures, high-temperature alloys like Inconel or Hastelloy are used. These materials can withstand elevated temperatures while maintaining their mechanical properties, making them suitable for applications in the aerospace and automotive industries.
• Titanium: Titanium bellows couplings are used in applications requiring a combination of high strength, low weight, and excellent corrosion resistance. They are commonly found in aerospace, marine, and medical equipment where the coupling needs to endure aggressive environments.

The specific material chosen for a bellows coupling depends on the operating conditions, budget constraints, and performance requirements of the application. It’s essential to select a material that can withstand the demands of the environment while ensuring reliable and efficient power transmission in the system.

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.

How do Bellows Couplings Accommodate Misalignment and Axial Motion between Shafts?

Bellows couplings are designed to accommodate misalignment and axial motion between shafts while maintaining accurate torque transmission. The key features that enable this flexibility are the bellows element and the coupling’s construction.

1. Bellows Element: The bellows element is a thin-walled, corrugated metal tube with deep convolutions. When torque is applied to the coupling, the bellows element flexes, allowing for angular misalignment between the driving and driven shafts. The corrugations in the bellows provide the necessary flexibility while maintaining the overall structural integrity of the coupling.

2. Axial Motion Compensation: Bellows couplings can also accommodate axial motion between shafts. When there is axial displacement, the bellows compresses or extends, effectively compensating for the relative movement of the shafts along the axial direction. This feature is particularly beneficial in applications where shafts experience thermal expansion or contraction during operation.

3. Single and Multi-Bellows Designs: Bellows couplings are available in both single and multi-bellows designs. Single-bellows couplings offer greater flexibility and are suitable for applications with relatively low misalignments and axial motion. On the other hand, multi-bellows couplings provide enhanced flexibility and can accommodate higher levels of misalignment and axial motion.

4. Zero Backlash: Bellows couplings are designed to have minimal or zero backlash. Backlash refers to the play or clearance between the coupling’s components. Zero backlash ensures that there is no lost motion when reversing the direction of rotation, making bellows couplings ideal for precision motion control applications.

5. Reducing Side Loads: To ensure optimal performance and longevity, it is essential to minimize side loads on bellows couplings. Excessive side loads can cause premature wear and fatigue in the bellows element, leading to reduced coupling life.

Overall, bellows couplings provide excellent flexibility and compensatory capabilities, making them a preferred choice in applications where misalignment and axial motion are expected. The ability to handle these factors without compromising torque transmission or introducing backlash makes bellows couplings suitable for various industries, including robotics, automation, aerospace, and semiconductor manufacturing.

editor by CX 2023-12-07