China Professional CHINAMFG Lm Type Basic Flexible Aluminum Star Jaw Coupling

Product Description

LM Basic Type Plum Elastic Coupling(GB/T 5272-2002)

♦Description
Plum elastic coupling has the characteristics of vibration reduction, buffering, small radial size, no lubrication and easy maintenance. Suitable for starting frequency, positive and negative rotation, medium and low speed, medium and small power transmission.Not suitable for heavy loads and frequent replacement of elastic elements.
The structure of plum elastic coupling is simple.But when the elastic element is replaced, the half coupling shall be moved axially.LMS type is easy to replace the elastic element without having to move the half coupling.
♦Detailed Pictures

♦Basic Parameter and Main Dimension

Type	Norminal torque(Tn/N·m)		Speed(Np)		Shaft hole diameter (d₁,d₂,d_z)	Length of shaft hole			LO			D	D₁	Type of elastic parts	Mass			Rotary inertia
	Hardness of elastic parts		LM	LMD,LMS		Y type	J1,Z type	L (recommend)	LM	LMD	LMS		LMD,LMS		LM	LMD	LMS			LM	LMD	LMS
	a/HA	b/HD				L
	80+5	60+5	r·min^-1		Mm										kg				kg·m²
LM1 LMD1 LMS1	25	45	15300	8500	12,14	32	27	35	86	92	98	50	90	MT1-a -b	0.66	1.21	1.33			0.0002	0.0008	0.0013
					16,18,19	42	30
					20,22,24	52	38
					25	62	44
LM2 LMD2 LMS2	50	100	1200	7600	16,18,19	42	30	38	95	101.5	108	60	100	MT2-a -b	0.93	1.65	1.74			0.0004	0.0014	0.0571
					20,22,24	52	38
					25,28	62	44
					30	82	60
LM3 LMD3 LMS3	100	200	10900	6900	20,22,24	52	38	40	103	110	117	70	110	MT3-a -b	1.41	2.36	2.33			0.0009	0.0571	0.0034
					25,28	62	44
					30,32	82	60
LM4 LMD4 LMS4	140	280	9000	6200	22,24	52	38	45	114	122	130	85	125	MT4-a -b	2.18	3.56	3.38			0.002	0.005	0.0064
					25,28	62	44
					30,32,35,38	82	60
					40	112	84
LM5 LMD5 LMS5	350	400	7300	5000	25,28	62	44	50	127	138.5	150	105	150	MT5-a -b	3.60	6.36	6.07			0.005	0.0135	0.0175
					30,32,35,38	82	60
					40,42,45	112	84
LM6 LMD6 LMS6	400	710	6100	4100	30,32,35,38	82	60	55	143	155	167	185	185	MT6-a -b	6.07	10.77	10.47			0.0114	0.0329	0.0444
					40,42,45,48	112	84
LM7 LMD7 LMS7	630	1120	5300	3700	35,38	82	60	60	159	172	185	205	205	MT7-a -b	9.09	15.30	14.22			0.5712	0.0581	0.571
					40,42,45,48,50,55	112	84
LM8 LMD8 LMS8	1120	2240	4500	3100	45,48,50,55,56	112	84	70	181	195	209	170	240	MT8-a -b	13.56	22.72	21.16			0. 0571	0.1175	0.1493
					60,63,65	142	107
LM9 LMD9 LMS9	1800	3550	3800	2800	50,55,56*	112	84	80	208	224	240	200	270	MT9-a -b	21.40	34.44	30.70			0.1041	0.2333	0.2767
					60,63,65,70,71,75	142	107
					80	172	132
LM10 LMD10 LMS10	2800	5600	3300	2500	60,63,65*,70,71,75	142	107	90	230	248	268	230	305	MT10-a -b	32.03	51.36	44.55			0.2105	0.4594		0.5262
					80,85,90,95	172	132
					100	212	167
LM11 LMD11 LMS11	4500	9000	2900	2200	71,71,75*	142	107	100	260	284	308	260	350	MT11-a -b	49.52	81.30	70.72			0.4338	0.9777		1.1362
					80,85,90,95	172	132
					100,110,120	212	167
LM12 LMD12 LMS12	6300	12500	2500	1900	80,85,90*95	172	132	115	297	321	345	300	400	MT12-a -b	73.45	115.53	99.54			0.8205	1.751		1.9998
					100,110,120,125	212	167
					130,140,150	252	202
LM13 LMD13 LMS13	11200	2000	2100	1600	90,95	172	132	125	323	348	373	360	460	MT13-a -b	103.86	161.79	137.53			1.6718	3.667		3.6719
					100,110,120,125	212	167
					130,140,150	252	202
LM14 LMD14 LMS14	12500	25000	1900	1500	100,110,120,125	212	167	135	333	358	383	400	500	MT14-a -b	127.59	196.32	165.25			2.499	4.8669		5.1581
					130,140,150	252	202
					160	302	242

NOTE:
1. Mass and rotary inertia are the approximation calculated according to the recommended minimum axial hole.
2. Diameter of shaft hole with* can be used for Z type shaft hole.
3. a.b is the code for 2 different materials and hardness of elastic parts.

♦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. If you have any needs for your new product or wish to make further improvements, we are here to offer our support.

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 the new model when there is 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 1 pcs.

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: T/T.

♦Contact Us

Web: huadingcoupling
Add: No.11 HangZhou Road,Chengnan park,HangZhou City,ZheJiang Province,China

Impact of Jaw Coupling on the Overall Reliability of Connected Equipment

A jaw coupling plays a critical role in enhancing the overall reliability of connected equipment in mechanical power transmission systems. Its design and features contribute to various aspects that positively influence reliability:

Misalignment Compensation: One of the key benefits of jaw couplings is their ability to accommodate misalignment between shafts. By allowing for angular, parallel, and axial misalignment, the jaw coupling reduces stress on connected equipment. It helps prevent excessive forces and shaft bending that can lead to premature wear or failure.
Shock Absorption: The elastomeric spider element used in jaw couplings acts as a shock absorber. It dampens vibrations and shock loads, protecting connected equipment from sudden jolts or impacts that could cause damage or fatigue over time.
Torsional Damping: Jaw couplings provide torsional damping, reducing the risk of torsional vibrations that can negatively affect equipment performance. By minimizing vibrations, the coupling contributes to smoother operation and extended equipment life.
Fail-Safe Design: In the event of a spider failure, jaw couplings often offer a fail-safe design. The spider is a replaceable component, and its failure does not typically lead to catastrophic failure of the coupling or connected equipment. This characteristic enhances the overall system reliability and simplifies maintenance.
Low Maintenance: Jaw couplings are relatively low maintenance compared to other coupling types. The elastomeric spider does not require lubrication and has a longer service life compared to metallic couplings. This reduces the frequency of maintenance activities, minimizing downtime and increasing equipment reliability.
Backlash-Free Operation: Some jaw couplings are designed to provide backlash-free operation, ensuring accurate motion transmission without play or clearance. This feature is particularly important in precision systems, preventing positioning errors and contributing to consistent performance.
Corrosion Resistance: Jaw couplings are available in various materials, including stainless steel and corrosion-resistant alloys. Choosing the appropriate material for the specific environment ensures the coupling’s longevity and reliability, even in harsh operating conditions.
Reduced Vibration Transfer: By isolating vibrations, jaw couplings prevent the transfer of harmful vibrations between connected equipment. This safeguard is crucial in delicate systems where excessive vibrations could lead to malfunction or damage.

Overall, a well-chosen and properly installed jaw coupling positively impacts the reliability of connected equipment. It helps prevent mechanical stress, dampens vibrations, and provides a reliable connection between shafts, contributing to the smooth and efficient operation of the entire mechanical system.

What are the temperature and environmental limitations of jaw couplings?

Jaw couplings, like many mechanical components, have temperature and environmental limitations that need to be considered for proper operation and longevity. These limitations are determined by the materials used in the construction of the jaw coupling and the specific operating conditions it will encounter. Here are some of the common temperature and environmental limitations of jaw couplings:

Temperature Limitations: The operating temperature range of a jaw coupling depends on the materials used for its components, particularly the elastomer spider. Standard elastomers, such as polyurethane or nitrile rubber, are commonly used in jaw couplings and have typical temperature limits of approximately -40°C to 80°C (-40°F to 176°F). For more extreme temperature requirements, specialized elastomers with higher or lower temperature resistance may be available. It is essential to consider the ambient temperature and the temperature generated during equipment operation to ensure the jaw coupling remains within its temperature limits.
Environmental Limitations: Jaw couplings can be affected by various environmental factors, and their performance might be influenced by the presence of certain substances. Some environmental limitations to consider include:
- Chemical Exposure: Exposure to harsh chemicals, oils, solvents, or corrosive substances can degrade the elastomer spider and other components of the jaw coupling. Specialized coatings or alternative materials may be required for applications with aggressive chemical environments.
- Dust and Debris: Excessive dust, dirt, or debris in the operating environment can accumulate on the coupling’s surfaces and affect its performance. Regular cleaning and maintenance may be necessary to prevent buildup and ensure optimal operation.
- Moisture and Water: Some jaw couplings may not be suitable for applications where they are continually exposed to moisture or submerged in water. In such cases, water-resistant or corrosion-resistant materials may be necessary.
- Shock and Vibration: High levels of shock and vibration in the operating environment can accelerate wear and reduce the coupling’s lifespan. Selecting a robust coupling design and appropriate materials can help mitigate the effects of these factors.
- Electrically Conductive Environments: In some applications, it is essential to consider the electrical conductivity of the coupling’s materials, especially when dealing with sensitive electronic equipment.

It is crucial to consult the manufacturer’s specifications and guidelines to ensure that the selected jaw coupling is suitable for the specific temperature and environmental conditions of the intended application. Proper maintenance, periodic inspections, and adhering to recommended operating parameters can extend the life and performance of the jaw coupling in a given environment.

Use of Jaw Couplings in Horizontal and Vertical Shaft Arrangements

Jaw couplings are versatile and can be used in both horizontal and vertical shaft arrangements. Their flexible and misalignment-absorbing design makes them suitable for various applications in different orientations.

Horizontal Shaft Arrangements: In horizontal shaft arrangements, the shafts are positioned parallel to the ground. Jaw couplings are commonly employed in this configuration to connect two shafts, such as those found in motor-driven systems, conveyor belts, and pumps.

Vertical Shaft Arrangements: In vertical shaft arrangements, the shafts are positioned perpendicular to the ground, one above the other. Jaw couplings can also be used in this setup to transmit power between the two vertically aligned shafts. Examples of applications with vertical shaft arrangements include some types of gearboxes, vertical pumps, and certain types of compressors.

It’s important to note that when using jaw couplings in vertical shaft arrangements, the weight of the connected equipment can impose axial loads on the coupling. In such cases, the coupling should be selected to handle both the radial and axial loads to ensure reliable performance.

Whether in horizontal or vertical arrangements, jaw couplings provide a cost-effective and efficient method of power transmission while accommodating misalignment and reducing shock loads. However, it is essential to consider the specific application’s requirements and select the appropriate size and type of jaw coupling for optimal performance and longevity.

editor by CX 2023-12-13