Product Description

GHC Oldham type coupling cross sliding clamp coupling

Description of   GHC Oldham type coupling cross sliding clamp 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  GHC Oldham type coupling cross sliding clamp coupling

model parameter	common bore diameter d1,d2	ΦD	L	LF	LP	F	M	tightening screw torque (N.M)
GHC-16X21	4,5,6,6.35	16	21	8.6	11.6	2.5	M2.5	1
GHC-16X30	4,5,6,6.35	16	30	13.1	11.6	3	M2.5	1
GHC-20X22	5,6,6.35,7,8	20	22	8.6	12.7	2.5	M2.5	1
GHC-20×33	5,6,6.35,7,8	20	33	14.1	12.7	3	M2.5	1
GHC-25×28	5,6,6.35,8,9,9.525,10,11,12	25	28	11.7	16.65	3	M3	1.5
GHC-25X39	5,6,6.35,8,9,9.525,10,11,12	25	39	17.2	16.65	4.2	M3	1.5
GHC-32X33	5,6,8,9,9.525,10,11,12.12.7,14,15,16	32	33	14	19.5	3	M4	2.5
GHC-32X45	5,6,8,9,9.525,10,11,12,12.7,14,15,16	32	45	20	19.5	4.5	M4	2.5
GHC-40X50	8,9,9.525,10,11,12,14,15,16,17,18,19	40	50	23	18.4	7	M5	7
GHC-45X46	8,9,9.525,10,11,12,14,15,16,17,18,19,20,22	45	46	21	18.4	7	M5	7
GHC-50X53	10,11,12.7,14,15,16,17,18,19,20,22,24	50	53	24	15	7.5	M6	12
GHC-50X58	10,11,12.7,14,15,16,17,18,19,20,22,24	50	58	26.5	17.5	8	M6	12
GHC-55X57	10,11,12.7,14,15,16,17,18,19,20,22,24,25,28,30,32	55	57	26	17.5	7.8	M6	12
GHC-63X71	14,15,16,17,18,19,20,22,24,25,28,30,32	63	71	33	24	10	M8	20
GHC-70X77	14,15,16,17,18,19,20,22,24,25,28,30,32,35,38	70	77	29.5	25	12	M8	20

  

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)
GHC-16X21	0.7	0.8	3	±0.2	8500	30	5.5×10-7	High strength aluminum alloy	P A 6 6	Anodizing treatment	8
GHC-16X30	0.7	0.8	3	±0.2	9000	30	5.9×10-7				12
GHC-20X22	1.2	1.2	3	±0.2	6500	58	1.3×10-6				13
GHC-20×33	1.2	1.2	3	±0.2	7000	58	1.5×10-6				19
GHC-25X28	2	1.6	3	±0.2	5500	130	4.0×10-6				24
GHC-25X39	22	1.6	3	±0.2	6000	130	4.5×10-6				35
GHC-32X33	4.5	2	3	±0.2	4500	270	1.3×10-5				48
GHC-32X45	4.5	2	3	±0.2	4800	270	1.5×10-5				67
GHC-40X50	9	2.4	3	±0.2	3600	520	4.2×10-5				114
GHC-45X46	12	2.5	3	±0.2	3500	800	4.5×10-5				140
GHC-50X53	19	2.6	3	±0.2	3000	800	1.0×10-4				190
GHC-50X58	19	3	3	±0.2	3000	800	1.1×10-4				215
GHC-55X57	25	3.2	3	±0.2	3000	900	1.3×10-5				260
GHC-63X71	33	3	3	±0.2	2550	1200	3.5×10-4				455
GHC-70X77	56	3.5	3	±0.2	2500	1260	4.1×10-5				520

 

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What are the Potential Limitations or Drawbacks of Using an Oldham Coupling?

While Oldham couplings offer numerous advantages, they also have some limitations and drawbacks that should be considered when selecting a coupling for a specific application:

1. Limited Misalignment Capacity: Oldham couplings can only accommodate small amounts of angular and axial misalignment between the shafts. They are not suitable for applications with high levels of misalignment as excessive misalignment can lead to premature wear and failure of the center disc.

2. Speed Limitations: Oldham couplings are generally not recommended for high-speed applications. The flexible center disc has a maximum speed limit, and exceeding this limit can cause the disc to fatigue and fail over time.

3. Temperature Sensitivity: The performance of Oldham couplings can be affected by temperature fluctuations. Extreme temperatures can impact the flexibility and integrity of the center disc material, leading to reduced coupling performance.

4. Backlash in High-Precision Systems: While Oldham couplings minimize backlash compared to some other couplings, they may still have some inherent clearance between the hubs and the center disc, leading to a slight amount of backlash. In ultra-high-precision systems, this slight backlash may be a concern.

5. Material Compatibility: The material used for the center disc must be chosen carefully to ensure compatibility with the specific application’s environment and the media being conveyed. Some aggressive chemicals or harsh environments may degrade the material over time.

6. Maintenance: Oldham couplings require periodic inspection and maintenance to ensure proper functioning. The center disc may wear out over time and need replacement, especially in applications with high torque or frequent start-stop cycles.

Despite these limitations, Oldham couplings remain a popular choice in many applications due to their vibration reduction, backlash minimization, and moderate misalignment compensation capabilities. However, it is essential to carefully assess the specific requirements of the application and consider the potential drawbacks before selecting an Oldham coupling.

How to Calculate the Required Size and Specifications for an Oldham Coupling

Calculating the required size and specifications for an Oldham coupling involves considering several key factors. Here’s a step-by-step guide to help you with the calculations:

1. Identify the Torque Requirements: Determine the maximum torque that the coupling needs to transmit between the two shafts. This can be done by analyzing the torque demands of the application and considering safety factors.
2. Select the Coupling Material: Based on the operating conditions and the type of machinery, choose a suitable material for the Oldham coupling. Common materials include aluminum, stainless steel, and acetal.
3. Calculate the Bore Diameter: Measure the diameters of the shafts that the coupling will connect. The bore diameter of the coupling should match the shaft diameters for a proper fit.
4. Determine the Coupling Size: The coupling’s size is typically specified by its outside diameter and length. Ensure that the selected coupling size fits within the available space in the mechanical system.
5. Consider Misalignment Compensation: Oldham couplings can accommodate angular misalignment. However, it’s essential to check the coupling’s rated misalignment capability to ensure it meets the application’s requirements.
6. Check Operating Speed: Verify that the selected coupling can handle the rotational speed (RPM) of the application without exceeding its critical speed.
7. Factor in Environmental Conditions: If the coupling will be exposed to harsh environmental conditions or corrosive substances, choose a material that can withstand these conditions.

Once you have gathered all the necessary information and made the calculations, you can select the appropriate Oldham coupling that meets the requirements of your specific application. It’s important to consult with coupling manufacturers or engineering experts to ensure the coupling’s compatibility and reliability in your system.

What is an Oldham Coupling and How Does It Function in Mechanical Systems?

An Oldham coupling is a type of flexible coupling used in mechanical systems to transmit torque between two shafts that are misaligned. It consists of three main components: two hubs or discs and a middle block. The two hubs are connected to the respective shafts, and the middle block sits in between them.

The key feature of the Oldham coupling is the middle block, which has slots on its opposite faces and is connected to the hubs using pins or keys. The slots in the middle block are oriented perpendicular to each other, allowing the middle block to move in a plane perpendicular to the axis of the shafts.

When torque is applied to one shaft, it is transmitted to the middle block of the coupling. Due to the slots, the middle block can slide laterally as the shafts rotate, accommodating both angular and axial misalignments between the shafts. This sliding action helps to reduce the reaction forces and wear that would otherwise occur in rigid couplings when misalignment is present.

Oldham couplings are known for their ability to provide constant velocity transmission even when misalignment exists. They do not have any backlash, which means there is minimal play between the coupling components during rotation. This feature makes them suitable for precision applications where accurate torque transmission and positioning are required.

One of the main advantages of the Oldham coupling is that it effectively isolates the connected shafts from each other, which can help in reducing vibrations and noise. Additionally, it can compensate for parallel misalignment between the shafts, making it ideal for applications where parallel shafts need to be connected while allowing some degree of misalignment.

Oldham couplings are commonly used in various industrial machinery and automation systems, including CNC machines, robotics, printing presses, and conveyor systems. They are particularly useful in applications where precise torque transmission, misalignment compensation, and low maintenance are essential.

editor by CX 2024-01-09