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

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Can Bellows Couplings Handle Angular and Parallel Misalignments Simultaneously?

Bellows couplings are designed to handle both angular and parallel misalignments simultaneously, making them versatile for various mechanical power transmission applications. The bellows element, typically made of a thin-walled metal structure, allows for flexibility in multiple directions, enabling the coupling to accommodate different types of misalignments.

1. Angular Misalignment: Angular misalignment occurs when the driving and driven shafts are not collinear and form an angle with each other. This type of misalignment can happen in applications where the shafts are not perfectly aligned due to assembly errors, shaft deflection, or thermal expansion. The bellows coupling’s design allows it to flex in response to angular misalignment, transmitting torque smoothly without inducing additional stress on the connected components.

2. Parallel Misalignment: Parallel misalignment, also known as lateral misalignment, happens when the axes of the driving and driven shafts are parallel but not concentric. This misalignment may occur due to inaccurate alignment during installation or shaft deflection under load. The bellows coupling’s flexible bellows element can also compensate for this type of misalignment, ensuring that the shafts remain parallel enough to prevent excessive forces and vibrations.

Simultaneous Misalignments: Bellows couplings are unique in their ability to handle both angular and parallel misalignments simultaneously. As the bellows element flexes in multiple directions, it can compensate for misalignments in both planes without imposing significant side loads on the shafts or bearings. This capability makes bellows couplings well-suited for precision motion control systems, where maintaining accurate alignment is crucial to ensure smooth operation and longevity of the equipment.

It is important to note that while bellows couplings can handle a certain degree of misalignment, excessive misalignments should be avoided to prevent premature wear and reduce the efficiency of the coupling. Regular maintenance and inspections can help identify and correct misalignment issues early, ensuring optimal performance and extended service life of the bellows coupling and the entire mechanical 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.

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 2024-03-26