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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Specific Safety Considerations for Using Oldham Couplings in High-Speed Applications

When using Oldham couplings in high-speed applications, there are several safety considerations to keep in mind to ensure the safe and efficient operation of the machinery:

1. Material Selection: Choose high-quality materials for the Oldham coupling components to withstand the stresses and forces experienced at high speeds.

2. Proper Installation: Ensure the coupling is installed correctly and securely to prevent any chances of coupling failure or disengagement during high-speed operation.

3. Balancing: Balance the coupling components accurately to minimize vibration and prevent excessive wear, which can be more pronounced at high speeds.

4. Regular Inspections: Implement a regular inspection and maintenance schedule to identify any signs of wear, misalignment, or damage that may occur due to high-speed operation.

5. Lubrication: Use appropriate lubrication to reduce friction and heat generation, which is crucial in high-speed applications.

6. Temperature Consideration: Monitor the temperature of the coupling during operation as high speeds can result in increased heat generation.

7. Avoid Overloading: Do not exceed the recommended torque and speed limits specified by the manufacturer to avoid overloading the coupling.

8. Coupling Guards: Consider using coupling guards or covers to protect personnel from rotating or moving coupling components in high-speed systems.

9. Emergency Shutdown: Install an emergency shutdown system to quickly stop the machinery in case of coupling failure or other emergencies.

10. Compliance with Standards: Ensure that the Oldham coupling and its installation comply with industry standards and regulations for high-speed applications.

By adhering to these safety considerations and implementing preventive measures, the risk of accidents, machinery damage, and downtime in high-speed applications can be significantly reduced. Always consult the coupling manufacturer’s guidelines and follow best practices for safe operation and maintenance.

Differences Between Oldham Couplings and Other Types of Flexible Couplings

Oldham couplings are a type of flexible coupling used in mechanical systems to transmit torque between two shafts. Here are some key differences between Oldham couplings and other types of flexible couplings:

• Mechanism of Torque Transmission: Oldham couplings use a sliding motion between the center disc and the hubs to transmit torque. The center disc has slots that engage with pins on the hubs, allowing for torque transmission while accommodating misalignment. In contrast, other flexible couplings, such as jaw couplings or beam couplings, typically use elastic materials or flexible elements like rubber or springs to transmit torque.
• Misalignment Compensation: Oldham couplings are specifically designed to handle angular misalignment between shafts. They can accommodate parallel misalignment to a limited extent but are not well-suited for axial misalignment. Other flexible couplings like beam couplings or bellows couplings may offer more comprehensive misalignment compensation, including axial misalignment.
• Backlash: Oldham couplings have a small amount of backlash due to the clearance between the center disc and the hubs. This backlash can be beneficial in some applications to reduce shock loads and vibrations. However, other flexible couplings like beam couplings or jaw couplings may have minimal or zero backlash.
• Construction and Materials: Oldham couplings are typically made of materials like aluminum for the hubs and center disc, and acetal or other plastics for the center disc’s sliding parts. Other flexible couplings come in various materials, including aluminum, stainless steel, elastomers, and composite materials, depending on the application’s requirements.
• Operating Speed: Oldham couplings are suitable for moderate to high rotational speeds, but their speed limitations depend on the material and design. Some other flexible couplings, such as bellows couplings, can handle even higher speeds due to their construction.
• Applications: Oldham couplings are commonly used in applications that require moderate torque transmission and angular misalignment compensation, such as pumps, packaging machines, and automation equipment. Other flexible couplings are used in a wide range of applications, including motion control systems, robotics, aerospace, and automotive industries, where specific coupling characteristics are needed.

Choosing the right flexible coupling depends on the specific requirements of the application, including torque, misalignment, speed, space constraints, and environmental conditions. Engineers and designers should carefully consider these factors to select the most appropriate coupling for their mechanical system.

Transmission of Torque in Oldham Couplings

An Oldham coupling is designed to transmit torque between two shafts that are misaligned but parallel to each other. It consists of three components: two hubs (also known as drive hubs) and a center disc. The hubs are connected to their respective shafts, while the center disc sits between them.

The center disc of the Oldham coupling is characterized by slots or keyways on its opposite sides, which engage with the hubs. The slots allow the center disc to slide or float within the hubs while maintaining a constant angular velocity between the shafts.

When torque is applied to the drive hub on one side, it induces a rotational force on the center disc. This rotational force is then transferred to the other drive hub, which results in torque transmission to the second shaft. The center disc acts as an intermediary between the two hubs, compensating for any axial or radial misalignment between the shafts.

Regarding the question of different shaft diameters, the Oldham coupling can accommodate shafts with different diameters as long as the hub design allows for a secure connection. The keyways or slots in the center disc and hubs should be compatible with the shaft dimensions to ensure proper torque transmission and to prevent slippage or damage.

It is essential to select the appropriate size and design of the Oldham coupling to match the shaft diameters and to ensure reliable torque transmission while accommodating any misalignment between the shafts.

editor by CX 2024-04-26