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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How to Identify Signs of Wear or Damage in an Oldham Coupling?

Regular inspection of Oldham couplings is essential to ensure their proper functioning and prevent unexpected failures. Here are some signs of wear or damage to look for during the inspection:

1. Visible Cracks or Deformation: Check the center disc and the hubs for any visible cracks, tears, or deformation. These can be indicators of excessive stress or misalignment.

2. Abnormal Vibrations: Excessive vibrations during operation may suggest that the coupling is not functioning correctly. It could be due to wear in the center disc or improper installation.

3. Unusual Noise: Grinding, clicking, or banging noises during equipment operation may indicate that the Oldham coupling is experiencing excessive backlash or misalignment.

4. Increased Backlash: If there is noticeable play or free movement between the coupling components, it may be a sign of wear in the center disc or worn hubs.

5. Reduced Performance: A decrease in the performance of the machinery or unexpected issues with power transmission could be indicative of coupling problems.

6. Abnormal Heating: If the coupling becomes unusually hot during operation, it may suggest friction or misalignment issues.

7. Excessive Wear on Center Disc: Inspect the center disc for signs of wear, such as grooves, uneven surfaces, or material loss. This may occur over time due to the repeated flexing of the disc.

8. Lubrication Issues: Improper or inadequate lubrication can lead to increased friction and wear in the coupling components.

If any of these signs are observed during the inspection, it is essential to address the issue promptly. Depending on the severity of the wear or damage, the Oldham coupling may require replacement or repair. Regular maintenance and proper lubrication can help extend the life of the coupling and prevent unexpected failures, ensuring smooth and reliable operation in the machinery or equipment.

Are there Industry Standards or Certifications for Oldham Couplings?

Yes, there are industry standards and certifications that apply to Oldham couplings to ensure their quality, performance, and interchangeability. The most common standards and certifications related to couplings are set by organizations such as the American National Standards Institute (ANSI), the International Organization for Standardization (ISO), and the American Society of Mechanical Engineers (ASME). While these standards might not specifically focus on Oldham couplings, they often include requirements and guidelines that cover various types of flexible couplings, including Oldham couplings.

For example, ANSI B11.20: Safety Requirements for Integrated Manufacturing Systems establishes safety requirements for the design, construction, installation, operation, and maintenance of integrated manufacturing systems. Although not specific to Oldham couplings, this standard may encompass certain aspects of coupling safety.

Additionally, ISO 9001 certification is a widely recognized quality management system certification that many coupling manufacturers strive to achieve. This certification demonstrates a manufacturer’s commitment to producing high-quality products and adhering to rigorous quality control procedures.

When selecting an Oldham coupling, it is essential to check if the manufacturer complies with relevant industry standards and has obtained certifications that demonstrate their commitment to product quality and safety. It is also crucial to consider the specific requirements of your application and whether the chosen coupling meets those needs.

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 2024-05-06