Product Description

Flexible Oldham Coupling Set Screw/Clamp Type Shaft Coupling for Servo Motor

Description of Flexible Oldham Coupling Set Screw/Clamp Type Shaft Coupling for Servo Motor

1.Zero rotation gap
2. High torque rigidity
3. Allow a large amount of deviation adjustment
4. Vibration absorption
5. Good electrical insulation
6. Simple structure and easy installation
 

Parameter of Flexible Oldham Coupling Set Screw/Clamp Type Shaft Coupling for Servo Motor

Dimension

Item	Bore Size				D	L	L1/L2	F	G	M	Torque N.m
	d1		d2
	Min	Max	Min	Max
JH16	3	6.35	3	6.35	16	18	7	3.5	M3	–	0.7
JH16C	4	6	4	6		29	12.5	3.5	–	M2.5	1.5
JH20	4	8	4	8	20	23	9	4.5	M4	–	1.7
JH20C	4	8	4	8		33	14	3.5	–	M3	1.5
JH25	5	12	5	12	25	28	11	5.5	M5	–	4
JH25C	5	12	5	12		39	16.5	3.5	–	M3	1.5
JH32	5	16	5	16	32	33	13	6.5	M6	–	7
JH32C	5	16	5	16		45	19	4.5	–	M4	2.5
JH40	8	20	8	20	40	35	14	7	M6	–	7
JH40C	8	20	8	20		50	23	7	–	M5	4
JH50	12	24	12	24	50	38	17	8.5	M8	–	15
JH50C	12	24	12	24		58	27	8	–	M6	8
JH63	14	30	14	30	63	47	21	10.5	M10	–	8
JH63C	14	30	14	30		71	33	10	–	M8	16

 Specification

Item	Rated Torque (Nm)	Max. Torque (Nm)	Allowable Speed (min-1)	Torsional Stiffness N.m/rad	Moment of Inertia 10-6kgm2	Iateral (mm)	Angular (.)	Net weight (g)
JH16	0.7	1.4	12000	31	0.32	1	3	7
JH16C					0.58			12
JH20	1.2	2.4	10000	60	1	1.5	3	14
JH20C					1.5			19
JH25	2	4	8000	140	3	2	3	27
JH25C					4.4			36
JH32	4.5	9	7000	280	9.5	2.5	3	50
JH32C					14			69
JH40	9	18	4800	540	23	3	3	80
JH40C					41			130
JH50	18	36	3000	820	67	3.5	3	150
JH50C					120			230
JH63	36	72	2800	1900	220	4	3	300
JH63C					370			450

Order Example

Item	D	C	d1	d2
JH	16	Clamp Type	3	3

                 

 

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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.

Can an Oldham Coupling be Used in Precision Motion Control Applications?

Yes, an Oldham coupling can be used in precision motion control applications. Oldham couplings are known for their ability to provide constant velocity transmission while accommodating misalignment. These couplings offer low backlash and minimal hysteresis, making them suitable for precision motion control systems.

Precision motion control applications require accurate and repeatable motion, which can be achieved by using an Oldham coupling. The coupling’s design allows it to handle angular misalignment without introducing significant axial or radial forces. This feature helps maintain the accuracy and integrity of the motion control system.

Oldham couplings are often used in applications such as robotics, CNC machines, optical equipment, and other systems where precise positioning and smooth motion are essential. Their ability to reduce vibration and minimize backlash is particularly beneficial in these applications, as it enhances the system’s overall performance and accuracy.

When selecting an Oldham coupling for precision motion control, it is essential to consider factors such as the required torque capacity, speed, and shaft sizes. Additionally, regular maintenance and proper alignment are crucial to ensure the coupling’s optimal performance in precision applications.

Installation and Maintenance of Oldham Couplings

Proper installation and maintenance are crucial for ensuring the optimal performance and longevity of an Oldham coupling. Here are the steps to install and maintain an Oldham coupling:

Installation:

• 1. Inspect the Components: Before installation, carefully inspect the Oldham coupling’s hubs and center disc for any signs of damage or wear.
• 2. Shaft Preparation: Ensure that the shafts are clean and free from any debris or burrs. Make sure the shaft diameters match the hub bores and keyway dimensions.
• 3. Center Disc Alignment: Align the center disc with the two hubs so that the slots or keyways on the center disc fit into the corresponding slots on the hubs.
• 4. Secure the Hubs: Slide the hubs onto the shafts and fasten them securely using appropriate fasteners such as screws or clamps.
• 5. Tighten Fasteners: Carefully tighten the fasteners according to the manufacturer’s recommendations. Be cautious not to over-torque, as it may lead to distortion or damage to the components.
• 6. Check Misalignment: Verify that the Oldham coupling can accommodate the required misalignment between the shafts without binding or excessive stress.

Maintenance:

• 1. Regular Inspection: Periodically inspect the Oldham coupling for signs of wear, damage, or misalignment. Look for any unusual noises or vibrations during operation.
• 2. Lubrication: Some Oldham couplings may require periodic lubrication for smooth operation. Check the manufacturer’s guidelines for the proper type and amount of lubricant.
• 3. Replace Worn Components: If any part of the Oldham coupling shows significant wear or damage, replace it with a new component from the original equipment manufacturer (OEM).
• 4. Alignment Check: Regularly check the alignment of the shafts and the coupling to ensure that the misalignment is within the specified limits.
• 5. Environmental Considerations: Take into account the operating environment, such as temperature and humidity, and use appropriate materials and coatings to resist corrosion and wear.
• 6. Follow Manufacturer Guidelines: Always adhere to the manufacturer’s installation, operation, and maintenance instructions to ensure safe and efficient coupling performance.

By following these installation and maintenance practices, an Oldham coupling can provide reliable torque transmission, compensate for misalignment, and contribute to the smooth operation of the connected machinery or equipment.

editor by CX 2024-01-15