Product Description

Telescopic flange long cardan shaft Coupling(SWP-A)

SWP partition profile bearing the cross shaft universal coupling products: replacement of bearings for, SWP type cardan design bearing split shaft bolt, suitable for hoisting and conveying machinery and other heavy machinery, connecting 2 different axis transmission shaft, axis angle of A~F type not more than 10 degrees, the G type is not greater than 5 degrees.

♦Product Structure

♦Basic Parameter And Main Dimension

Type	Tactical diameter D mm	Nominal torque Tn kN·m	Fatique torque Tf kN·m	Axis angle β (°)	Stretch length S mm	Size(mm)										Rotary inertia kg·m2		Mass kg
						Lmin	D1 js11	D2 H7	D3	E	E1	B×h	h1	L1	n-d	Lmin	Increase 100	Lmin	Increase 100
SWP160A	160	16	8	≤10	50	660	140	95	114	15	4	20×12	6	85	6-13	0.13	0.0059	47	2.1
SWP180A	180	20	10	≤10	60	752	155	105	121	15	4	24×14	7	95	6-15	0.22	0.0072	60	2.3
SWP200A	200	31.5	16	≤10	70	823	175	125	17	17	5	28×16	8	110	8-15	0.37	0.0114	81	3.4
SWP225A	225	40	20	≤10	76	933	196	135	152	20	5	32×18	9	130	8-17	0.63	0.5710	109	6.6
SWP250A	250	63	31.5	≤10	80	978	218	150	168	25	5	40×25	12.5	135	8-19	1.02	0.0407	147	7.3
SWP285A	285	90	45	≤10	100	1133	245	170	194	27	7	40×30	15	150	8-21	2.17	0.0702	241	9.4
SWP315A	315	140	63	≤10	110	1250	280	185	219	32	7	40×30	15	170	10-23	3.86	0.1144	322	12.0
SWP350A	350	180	90	≤10	120	1380	310	210	245	35	8	50×32	16	185	10-23	6.66	0.1663	428	13.6
SWP390A	390	250	112	≤10	120	1495	345	235	273	40	8	70×36	18	205	10-25	11.53	0.2695	566	18.0
SWP435A	435	355	160	≤10	150	1710	385	255	299	42	10	80×40	20	235	16-28	21.81	0.3645	932	20.0
SWP480A	480	450	224	≤10	170	1910	425	275	351	47	12	90×45	22.5	265	16-31	38.04	0.7571	1294	28.0
SWP550A	550	710	315	≤10	190	2135	492	320	402	50	12	100×45	22.5	290	16-31	61.28	1.1842	1744	35.7
SWP600A	600	1000	500	≤10	210	3580	544	380	450	55	15	90×55	27.5	360	22-34	98.63	1.7159	2330	40.5
SWP640A	640	1250	630	≤10	230	2685	575	385	480	60	15	100×60	30	385	18-38	167.67	2.3080	3153	48.3

·Note:L is the length of installation,including the value of S/Z shrinkage.

♦Product Show

♦Cardan Shaft Types
We can supply you SWP,SWC,WSD,WS universal coupling as following:
Welded shaft type with length compensation / expansion joint

Short type with length compensation / expansion joint

Short type without length compensation / expansion joint

Long type without length compensation / expansion joint

Double flange with length compensation / expansion joint

Long type with big length compensation / big expansion joint

Super Short type with length compensation / expansion joint

♦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
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. To perfect our service, we provide the products with good quality at the reasonable price.

Welcome to customize products from our factory and please provide your design drawings or contact us if you need other requirements.

♦Our Services
1.Design Services
Our design team has experience in cardan shaft 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 special test by Professional Staff according to the standard of ISO9001 and TS16949.

♦FAQ
Q 1: Are you trading company or 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 of 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 then cost of sample will be deducted.

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

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. 2) L/C 

♦Contact Us
Web: huadingcoupling
 
 
Add: No.1 HangZhou Road,Chengnan park,HangZhou City,ZheJiang Province,China

How to Choose the Right Worm Shaft

You might be curious to know how to choose the right Worm Shaft. In this article, you will learn about worm modules with the same pitch diameter, Double-thread worm gears, and Self-locking worm drive. Once you have chosen the proper Worm Shaft, you will find it easier to use the equipment in your home. There are many advantages to selecting the right Worm Shaft. Read on to learn more.

Concave shape

The concave shape of a worm’s shaft is an important characteristic for the design of a worm gearing. Worm gearings can be found in a wide range of shapes, and the basic profile parameters are available in professional and firm literature. These parameters are used in geometry calculations, and a selection of the right worm gearing for a particular application can be based on these requirements.
The thread profile of a worm is defined by the tangent to the axis of its main cylinder. The teeth are shaped in a straight line with a slightly concave shape along the sides. It resembles a helical gear, and the profile of the worm itself is straight. This type of gearing is often used when the number of teeth is greater than a certain limit.
The geometry of a worm gear depends on the type and manufacturer. In the earliest days, worms were made similar to simple screw threads, and could be chased on a lathe. During this time, the worm was often made with straight-sided tools to produce threads in the acme plane. Later, grinding techniques improved the thread finish and reduced distortions resulting from hardening.
When a worm gearing has multiple teeth, the pitch angle is a key parameter. A greater pitch angle increases efficiency. If you want to increase the pitch angle without increasing the number of teeth, you can replace a worm pair with a different number of thread starts. The helix angle must increase while the center distance remains constant. A higher pitch angle, however, is almost never used for power transmissions.
The minimum number of gear teeth depends on the angle of pressure at zero gearing correction. The diameter of the worm is d1, and is based on a known module value, mx or mn. Generally, larger values of m are assigned to larger modules. And a smaller number of teeth is called a low pitch angle. In case of a low pitch angle, spiral gearing is used. The pitch angle of the worm gear is smaller than 10 degrees.

Multiple-thread worms

Multi-thread worms can be divided into sets of one, two, or 4 threads. The ratio is determined by the number of threads on each set and the number of teeth on the apparatus. The most common worm thread counts are 1,2,4, and 6. To find out how many threads you have, count the start and end of each thread and divide by two. Using this method, you will get the correct thread count every time.
The tangent plane of a worm’s pitch profile changes as the worm moves lengthwise along the thread. The lead angle is greatest at the throat, and decreases on both sides. The curvature radius r” varies proportionally with the worm’s radius, or pitch angle at the considered point. Hence, the worm leads angle, r, is increased with decreased inclination and decreases with increasing inclination.
Multi-thread worms are characterized by a constant leverage between the gear surface and the worm threads. The ratio of worm-tooth surfaces to the worm’s length varies, which enables the wormgear to be adjusted in the same direction. To optimize the gear contact between the worm and gear, the tangent relationship between the 2 surfaces is optimal.
The efficiency of worm gear drives is largely dependent on the helix angle of the worm. Multiple thread worms can improve the efficiency of the worm gear drive by as much as 25 to 50% compared to single-thread worms. Worm gears are made of bronze, which reduces friction and heat on the worm’s teeth. A specialized machine can cut the worm gears for maximum efficiency.

Double-thread worm gears

In many different applications, worm gears are used to drive a worm wheel. These gears are unique in that the worm cannot be reversed by the power applied to the worm wheel. Because of their self-locking properties, they can be used to prevent reversing motion, although this is not a dependable function. Applications for worm gears include hoisting equipment, elevators, chain blocks, fishing reels, and automotive power steering. Because of their compact size, these gears are often used in applications with limited space.
Worm sets typically exhibit more wear than other types of gears, and this means that they require more limited contact patterns in new parts. Worm wheel teeth are concave, making it difficult to measure tooth thickness with pins, balls, and gear tooth calipers. To measure tooth thickness, however, you can measure backlash, a measurement of the spacing between teeth in a gear. Backlash can vary from 1 worm gear to another, so it is important to check the backlash at several points. If the backlash is different in 2 places, this indicates that the teeth may have different spacing.
Single-thread worm gears provide high speed reduction but lower efficiency. A multi-thread worm gear can provide high efficiency and high speed, but this comes with a trade-off in terms of horsepower. However, there are many other applications for worm gears. In addition to heavy-duty applications, they are often used in light-duty gearboxes for a variety of functions. When used in conjunction with double-thread worms, they allow for a substantial speed reduction in 1 step.
Stainless-steel worm gears can be used in damp environments. The worm gear is not susceptible to rust and is ideal for wet and damp environments. The worm wheel’s smooth surfaces make cleaning them easy. However, they do require lubricants. The most common lubricant for worm gears is mineral oil. This lubricant is designed to protect the worm drive.

Self-locking worm drive

A self-locking worm drive prevents the platform from moving backward when the motor stops. A dynamic self-locking worm drive is also possible but does not include a holding brake. This type of self-locking worm drive is not susceptible to vibrations, but may rattle if released. In addition, it may require an additional brake to keep the platform from moving. A positive brake may be necessary for safety.
A self-locking worm drive does not allow for the interchangeability of the driven and driving gears. This is unlike spur gear trains that allow both to interchange positions. In a self-locking worm drive, the driving gear is always engaged and the driven gear remains stationary. The drive mechanism locks automatically when the worm is operated in the wrong manner. Several sources of information on self-locking worm gears include the Machinery’s Handbook.
A self-locking worm drive is not difficult to build and has a great mechanical advantage. In fact, the output of a self-locking worm drive cannot be backdriven by the input shaft. DIYers can build a self-locking worm drive by modifying threaded rods and off-the-shelf gears. However, it is easier to make a ratchet and pawl mechanism, and is significantly less expensive. However, it is important to understand that you can only drive 1 worm at a time.
Another advantage of a self-locking worm drive is the fact that it is not possible to interchange the input and output shafts. This is a major benefit of using such a mechanism, as you can achieve high gear reduction without increasing the size of the gear box. If you’re thinking about buying a self-locking worm gear for a specific application, consider the following tips to make the right choice.
An enveloping worm gear set is best for applications requiring high accuracy and efficiency, and minimum backlash. Its teeth are shaped differently, and the worm’s threads are modified to increase surface contact. They are more expensive to manufacture than their single-start counterparts, but this type is best for applications where accuracy is crucial. The worm drive is also a great option for heavy trucks because of their large size and high-torque capacity.