Product Description

GH Oldham type coupling cross sliding set screw coupling

Description of   GH Oldham type coupling cross sliding set screw coupling
>The colloid material is imported PA66, which has good wear resistance, corrosion resistance and electrical insulation
>Sliding design can compensate radial and angular deviation more effectively
>Detachable design, easy to install
>Fastening method of clamping screw

Dimensions of  GH Oldham type coupling cross sliding set screw coupling

  

model parameter	common bore diameter d1,d2	ΦD	L	LF	LP	F	M	tightening screw torque (N.M)
GH-16X18	4,5,6,6.35,7,8	16	18	7.1	11.6	3.55	M3	0.7
GH-20X25	5,6,6.35,7,8,9,9.525	20	25	9.1	12.7	4.55	M4	1.7
GH-25X28	5,6,6.35,8,9,9.525,10,11,12,14	25	28	11.7	16.65	5.58	M4	1.7
GH-32×33	5,6,8,9,9.525,10,11,12,12.7,14,15,16	32	33	14	19.5	7	M4	1.7
GH-40X35	8,9,9.525,10,11,12,12.7,14,14,16,17,18,19,20	40	35	15.5	18.4	7.75	M4	1.7
GH-45X46	8,9,9.525,10,11,12.7,14,15,16,17,18,19,20,22	45	46	21.5	18.4	9	M5	4
GH-50X38	10,12,12.7,14,15,16,17,18,19,20,22,24,25	50	38	16.5	15	8.25	M5	4
GH-55X57	10,12,12.7,14,15,16,17,18,19,20,22,24,25,28,30,32	55	57	27	17.5	10.5	M5	4
GH-63X47	14,15,16,17,18,19,20,22,24,25,28,30,32	63	47	21	17.5	10.5	M6	8.4
GH-70X77	16,17,18,19,20,22,24,25,28,30,32,38,40	70	77	36.5	25	13.5	M8	10.5

 

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	Material of shrapnel	surface treatment	weight (g)
GH-16X18	0.7	0.8	3	±0.2	9000	30	3.3×10-7	High strength aluminum alloy	P A 6 6	Anodizing treatment	6
GH-20X25	1.2	1.2	3	±0.2	7000	58	1.1×10-6				18
GH-25X28	2	1.6	3	±0.2	6000	130	3.1×10-6				25
GH-32×33	4.5	2	3	±0.2	4800	270	9.6×10-6				44
GH-40X35	9	2.4	3	±0.2	3600	520	2.3×10-5				81
GH-45X46	12	2.8	3	±0.2	3500	560	3.8×10-5				136
GH-50X38	19	2.6	3	±0.2	3000	800	1.8×10-4				142
GH-55X57	22	3.3	3	±0.2	2800	795	8.0×10-4				255
GH-63X47	19	3	3	±0.2	2500	1200	8.3×10-4				320
GH-70X77	56	3.8	3	±0.2	2500	1260	3.9×10-4				445

 

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Can an Oldham Coupling Reduce Vibration and Backlash in Mechanical Systems?

Yes, an Oldham coupling can help reduce vibration and minimize backlash in mechanical systems, making it a popular choice for applications that require precise and smooth power transmission.

Vibration Reduction: Oldham couplings are designed with a three-piece construction, comprising two hubs and a center disc. The center disc, also known as the spacer, is made of a flexible material such as acetal or nylon. When torque is transmitted through the coupling, the center disc flexes, absorbing any misalignment between the shafts. This flexing action helps dampen vibration and reduces resonance in the system, leading to smoother operation and less mechanical stress on connected components.

Backlash Minimization: Backlash is the amount of play or free movement between the mating parts of a mechanical system. In traditional couplings like gear couplings, there can be significant backlash due to the nature of the gear teeth. However, Oldham couplings have a unique design that allows them to transmit torque with minimal backlash. The center disc provides a small amount of clearance between the hubs, enabling smooth rotation without backlash. This characteristic is especially beneficial in applications that require precise motion control, such as robotics and CNC machines.

Overall, the flexible and backlash-free nature of Oldham couplings makes them well-suited for applications where vibration reduction and precise motion control are essential. By reducing vibration and backlash, Oldham couplings contribute to the overall efficiency, accuracy, and reliability of the mechanical system they are employed in.

Can an Oldham Coupling be Used in Both Horizontal and Vertical Shaft Orientations?

Yes, an Oldham coupling can be used in both horizontal and vertical shaft orientations. The design of the Oldham coupling allows it to accommodate misalignment between shafts in multiple directions, including axial, angular, and parallel misalignments.

In horizontal shaft arrangements, the Oldham coupling can handle misalignment between two parallel shafts while transmitting torque smoothly and efficiently. It is commonly used in various power transmission applications where two shafts are relatively close together and require a reliable coupling to compensate for misalignment.

In vertical shaft orientations, the Oldham coupling can handle axial misalignment, which is the misalignment between the rotational axes of the two shafts. This makes it suitable for applications where the connected shafts are not perfectly aligned due to gravitational forces or other factors.

The Oldham coupling’s ability to accommodate misalignment in both horizontal and vertical shaft orientations makes it a versatile choice for a wide range of mechanical systems, including pumps, compressors, conveyor systems, and more. However, it is essential to ensure proper installation and maintenance to maximize the coupling’s performance and service life in any shaft orientation.

Advantages of Using an Oldham Coupling Compared to Other Types of Couplings

An Oldham coupling offers several advantages over other types of couplings, making it a preferred choice in certain applications:

• Misalignment Compensation: The Oldham coupling can handle both angular and axial misalignments between shafts. It allows for up to a few degrees of misalignment while transmitting torque smoothly, reducing the risk of premature wear and failure caused by misalignment.
• No Backlash: Unlike some other flexible couplings, the Oldham coupling has minimal backlash. This means there is little to no play or clearance between the coupling components during rotation, ensuring precise torque transmission and positioning in high-precision applications.
• Vibration and Noise Damping: The sliding action of the middle block in the coupling helps to isolate the shafts from each other, reducing vibrations and noise during operation. This feature is beneficial in applications where vibration dampening is critical to equipment performance and longevity.
• High Torque Transmission: Oldham couplings can handle relatively high torque transmission, making them suitable for applications with moderate to high torque requirements.
• Low Maintenance: Due to its design, the Oldham coupling experiences minimal wear during operation, leading to lower maintenance requirements and longer service life.
• Easy Installation: Oldham couplings are relatively easy to install and remove, simplifying maintenance and replacement procedures.
• Electrically Insulating: Some Oldham couplings are available with non-conductive materials, providing electrical isolation between shafts, which is essential in certain applications.
• Cost-Effective: Compared to other high-performance couplings, Oldham couplings are often more cost-effective, providing reliable performance without breaking the budget.

Overall, the Oldham coupling is an excellent choice in applications where misalignment compensation, precision torque transmission, vibration dampening, and low maintenance are critical factors for successful operation. Its unique design and features make it suitable for various industrial and automation systems, contributing to smoother and more efficient mechanical power transmission.

editor by CX 2023-12-26