Product Description

LLA Type Tyre Coupling for Metallurgical

The LLA Flexible Tyre Coupling is a kind of high elastic coupling, with good damping buffer and superior offset compensation performance.
The working temperature of 20~80 degrees Celsius, transmitting torque 10~20000NM, suitable for damp, dust, shock, vibration, reversing the changeable and frequent starting working conditions, and convenient assembly and disassembly, no lubrication, durable and reliable. Non standard couplings are made in accordance with special needs. In overloading work and half coupling, there will be no malignant accidents.

LLA Type Tyre Coupling Main Dimension And Parameter(JB/T10541-2005)

Type	Main dimension			Number of screws Md×L	Shaft hole diameter d dz	Shaft hole length		Allowable Torque	Allowable Speed	Rotary inertia	Mass
	D	D1	S			L	L1	Tn	(n)	kg·m2	kg
						Y J1 J	Z	N·m	r/min
LLA1	60	20	4	12-M4×10	6-11	16-25	–	10	5000	0.0004	0.35
LLA2	100	36	8	12-M6×20	8-19	14-42	35	20	5000	0.005	1.33
LLA3	135	48	12	12-M8×25	18-28	30-62	35-50	80	4000	0.571	3.4
LLA4	180	64	18	12-M10×30	25-38	44-82	50-65	160	3150	0.071	7.4
LLA5	210	80	18	16-M10×40	32-50	60-112	65-90	315	2800	0.154	13.4
LLA6	265	100	24	16-M12×40	40-56	84-112	90	630	2500	0.46	22.6
LLA7	310	120	28	16-M16×50	48-75	84-142	90-120	1250	2000	1.86	34.8
LLA8	400	150	38	16-M20×60	60-95	107-172	120-145	2500	1600	3.57	74.3
LLA9	450	190	42	20-M20×70	80-125	132-212	145-180	5000	1250	6.47	111
LLA10	550	230	52	24-M24×80	100-150	167-252	180-220	10000	1000	17.55	191
LLA11	700	280	70	32-M30×90	130-180	202-302	220-270	20000	800	54.1	373

Note:
1.For 2 half coupling Shaft holes, Y,J,J₁ type shaft hole may be used as required,but Z,J type shaft hole shall not be used at both ends.

2.S dimension should take into consideration if Z₁ shaft hole is to be used.
 

Product Display

♦Other Products List

Transmission Machinery  Parts Name	Model
Universal Coupling	WS,WSD,WSP
Cardan Shaft	SWC,SWP,SWZ
Tooth Coupling	CL,CLZ,GCLD,GIICL, GICL,NGCL,GGCL,GCLK
Disc Coupling	JMI,JMIJ,JMII,JMIIJ
High Flexible Coupling	LM
Chain Coupling	GL
Jaw Coupling	LT
Grid Coupling	JS

♦Our Company

HangZhou CHINAMFG Machinery Manufacturing Co., Ltd. is a high-tech enterprise specializing in the design and manufacture of various types of coupling. There are 86 employees in our company, including 2 senior engineers and no fewer than 20 mechanical design and manufacture, heat treatment, welding, and other professionals.

Advanced and reasonable process, complete detection means. Our company actively introduces foreign advanced technology and equipment, on the basis of the condition, we make full use of the advantage and do more research and innovation. Strict to high quality and operate strictly in accordance with the ISO9000 quality certification system standard mode.

Our company supplies different kinds of products. High quality and reasonable price. We stick to the principle of “quality first, service first, continuous improvement and innovation to meet the customers” for the management and “zero defect, zero complaints” as the quality objective. 

♦Our Services
1. Design Services
Our design team has experience in Cardan shafts relating to product design and development. We are here to offer our support if you have any needs for your new product or wish to make further improvements.

2. Product Services
raw materials → Cutting → Forging →Rough machining →Shot blasting →Heat treatment →Testing →Fashioning →Cleaning→ Assembly→Packing→Shipping

3. Samples Procedure
We could develop the sample according to your requirement and amend the sample constantly to meet your need.

4. Research & Development
We usually research the new needs of the market and develop new model when there are new cars in the market.

5. Quality Control
Every step should be a special test by Professional Staff according to the standard of ISO9001 and TS16949.

♦FAQ
Q 1: Are you a trading company or a manufacturer?
A: We are a professional manufacturer specializing in manufacturing
various series of couplings.

Q 2:Can you do OEM?
Yes, we can. We can do OEM & ODM for all the customers with customized artworks in PDF or AI format.

Q 3:How long is your delivery time?
Generally, it is 20-30 days if the goods are not in stock. It is according to quantity.

Q 4: Do you provide samples? Is it free or extra?
Yes, we could offer the sample but not for free. Actually, we have a very good price principle, when you make the bulk order the cost of the sample will be deducted.

Q 5: How long is your warranty?
A: Our Warranty is 12 months under normal circumstances.

Q 6: What is the MOQ?
A: Usually our MOQ is 1pcs.

Q 7: Do you have inspection procedures for coupling?
A:100% self-inspection before packing.

Q 8: Can I have a visit to your factory before the order?
A: Sure, welcome to visit our factory.

Q 9: What’s your payment?
A:1) T/T. 

♦Contact Us
Web: huadingcoupling
Add: No.11 HangZhou Road,Chengnan park,HangZhou City,ZheJiang Province,China /* March 10, 2571 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

How to Select the Right Size and Type of Tyre Coupling for Specific Applications?

Selecting the right size and type of tyre coupling is crucial to ensure optimal performance and longevity in specific industrial applications. Here are the steps to guide you in choosing the appropriate tyre coupling:

1. Identify Application Requirements: Understand the specific requirements of the application, including the torque and power transmission requirements, operating speed, and the presence of shock loads and vibrations. Consider the equipment’s duty cycle, the type of machinery involved, and any special environmental conditions.
2. Calculate Torque Requirements: Calculate the torque that needs to be transmitted by the coupling. This can be determined by considering the maximum power output of the driver (e.g., motor) and the requirements of the driven equipment (e.g., pump, fan). Ensure that the selected coupling has a torque rating that exceeds the calculated value to provide a safety margin.
3. Check Bore Sizes: Ensure that the tyre coupling’s bore sizes match the shaft sizes of the connected equipment. The coupling’s bore should be a suitable fit for the shaft diameter without excessive play, ensuring efficient power transmission.
4. Consider Misalignment Tolerance: Tyre couplings can accommodate angular, parallel, and axial misalignments. Evaluate the expected misalignment in the application and choose a coupling with an appropriate misalignment capability to prevent excessive forces and premature wear on the machinery.
5. Assess Speed Capability: Verify that the selected tyre coupling can handle the rotational speed of the application. Ensure that the coupling’s maximum speed rating exceeds the application’s operating speed to prevent issues like resonance and excessive heat buildup.
6. Environmental Conditions: Consider the environmental conditions in which the coupling will operate. Factors such as temperature, humidity, presence of chemicals, and exposure to outdoor elements can impact the coupling’s performance and material selection. Choose a coupling with suitable material properties and coatings to withstand the specific environment.
7. Verify Shock Load Capacity: If the application is subject to sudden impact or shock loads, ensure that the selected tyre coupling has sufficient shock load capacity to handle these events without compromising performance or causing damage to the equipment.
8. Consult Manufacturer’s Guidelines: Refer to the manufacturer’s product catalog or guidelines for detailed specifications and recommendations for different applications. Manufacturers often provide coupling selection tools and engineering support to assist in making the right choice.

By carefully evaluating these factors and considering the specific requirements of the application, you can select the appropriate size and type of tyre coupling to achieve reliable and efficient operation in your industrial machinery and equipment.

Is Backlash a Concern with Tyre Couplings, and How is it Minimized?

Backlash is a potential concern with all types of flexible couplings, including tyre couplings. Backlash refers to the amount of free movement or play between the coupling’s components, particularly the tyre element and the coupling hubs. Excessive backlash can lead to inaccuracies, vibration, and reduced responsiveness in mechanical systems. However, tyre couplings are designed to minimize backlash through various features and proper installation techniques.

Here’s how tyre couplings address and minimize backlash:

• High Torsional Flexibility: Tyre couplings are known for their high torsional flexibility, allowing them to accommodate misalignments and angular displacements between the connected shafts. This flexibility helps to minimize the transmission of torsional forces and prevent excessive backlash.
• Material Selection: The choice of materials for the tyre element plays a vital role in minimizing backlash. High-quality elastomers, such as natural rubber or synthetic rubber compounds, provide excellent damping properties and resilience. These materials are selected to maintain a tight fit between the tyre and the coupling hubs, minimizing any free movement.
• Tight Fit Design: Tyre couplings are designed to have a tight fit between the tyre element and the hubs. The rubber tyre is molded or bonded to the hubs with a precise fit, reducing any potential play between the components.
• Proper Installation: Ensuring proper installation is crucial to minimize backlash. The tyre coupling should be mounted and aligned following the manufacturer’s guidelines. Tightening the coupling bolts to the specified torque values ensures a secure fit and reduces the risk of backlash due to loose connections.
• Regular Maintenance: Like any mechanical component, tyre couplings require periodic inspections and maintenance. Regularly checking for wear, damage, or signs of deterioration in the tyre element allows for early detection and replacement, minimizing the risk of increased backlash over time.

While tyre couplings are designed to minimize backlash, it is essential to choose the appropriate coupling size and type for the specific application. Additionally, considerations such as operating conditions, torque requirements, and misalignment levels should be accounted for during the coupling selection process to ensure optimal performance and backlash reduction.

By selecting high-quality tyre couplings, following proper installation procedures, and conducting regular maintenance, users can effectively minimize backlash and ensure the coupling’s reliable and efficient operation in mechanical systems.

Comparison between Tyre Couplings and Other Types of Flexible Couplings

Flexible couplings are essential components in machinery and equipment that connect two shafts and allow for the transmission of torque while accommodating misalignment and damping vibrations. Several types of flexible couplings are available in the market, each with its advantages and applications. Let’s compare tyre couplings with some other common types of flexible couplings:

1. Tyre Couplings:

• Advantages:
• High misalignment tolerance, accommodating angular, parallel, and axial misalignments.
• Excellent vibration damping properties, reducing the transmission of vibrations to connected equipment.
• Good shock load absorption, protecting machinery from sudden impacts and overloads.
• Simple installation and maintenance.
• Cost-effective solution for various industrial applications.
• Applications:
• Motors, pumps, compressors, fans, conveyors, and material handling systems.
• Power transmission in industrial, construction, and marine applications.
• Mining equipment and steel mills.

2. Grid Couplings:

• Advantages:
• High torque capacity and torsional stiffness.
• Moderate misalignment tolerance.
• Good vibration dampening.
• Easy maintenance, as the grid can be replaced separately.
• Applications:
• Heavy machinery and industrial equipment.
• Pumps, compressors, and conveyors.
• Applications with moderate misalignment and high torque requirements.

3. Gear Couplings:

• Advantages:
• High torque capacity and torsional stiffness.
• Good misalignment tolerance, particularly angular misalignment.
• Robust and suitable for heavy-duty applications.
• High efficiency with little power loss.
• Applications:
• Steel mills, heavy machinery, and industrial equipment.
• Mining and mineral processing equipment.
• Applications with high torque requirements and moderate misalignment.

4. Oldham Couplings:

• Advantages:
• Zero-backlash design.
• High misalignment tolerance, particularly angular misalignment.
• Smooth and accurate power transmission.
• Relatively simple construction and installation.
• Applications:
• Precision machinery, automation systems, and robotics.
• Printing and textile machines.
• Applications with low to moderate torque requirements and angular misalignment.

Each type of flexible coupling has its own strengths and limitations, making it suitable for specific applications. The choice of coupling depends on factors such as torque requirements, misalignment conditions, the level of damping required, environmental conditions, and the specific machinery or equipment involved.

editor by CX 2024-01-19