The most complete knowledge of car tires

Car tires are the "foot" of cars, but many car owners have a relatively superficial understanding of car tires. They have not been known for a few times. Let's explain the most complete knowledge of car tires. I hope you don't understand. Helpful. First, car tire selection and precautions 1, according to the model or specifications: priority to the original tires of the vehicle, the original tire specifications are best compatible with the car speed and the maximum load of the car, so in theory, in the replacement of tires It should be given priority. The following is a common indication of tire specifications: Example: 185/70R1486H 185: tread width (mm) 70: flat ratio (tire height tire width) (70 points 70%) R: meridian structure 14: steel ring diameter ( Inch) 86: Load index (indicating the corresponding maximum load is 530 kg) H: Speed â€‹â€‹code (indicating the highest safety speed is 210 km / h) 2. Note 1), or just start thinking about the original tire 2) Secondly, pay attention to the tire pattern, the pattern on the car tire, in addition to the aesthetic effect, it also has a great impact on the performance of the tire. For cars that are often driven in deep water, those with better drainage should be selected, such as regular small block patterns; for cars that require off-road and long-distance running, you can choose a large block pattern. 3) Finally, if you are not satisfied with the original handling of the vehicle, you can consider replacing the tire with lower flat ratio. For many models, one of the most effective ways to improve the appearance and handling performance of the vehicle is to replace the low flat ratio. Tires. Each type of tire has its specific function, so when choosing a tire, you should ask what type of tire is suitable for driving habits, so that the car is safer when driving, and the money spent on the tire is more worth it. 4) When selecting tires, be careful not to mix different types of tires, for example, tires that are more suitable for off-road vehicles, tires with general cars, or directional sports tires. Used in combination with a normal tire wheel. 5) In the purchase, we should try our best to avoid retreading the tires. At present, some street shops often sell some refurbished tires for sale. Consumers must pay attention to the purchase. The method of identifying retreaded tires is simple: the most common is to observe the color and luster of the tires. The color and luster of the retreaded tires are relatively bleak, so don't blindly buy such tires. The professional masters identify the tires by the signs on the tires. The tires have some protruding signs on the tires, indicating the type and performance of the tires. These are the breakthrough points for identifying retreaded tires. The signs of the refurbished tires are re-posted after renovation, and the signs of the new tires are integrated with the tires. The identification method is to scratch the signs with the fingernails. Generally, these signs of the refurbished tires are not very tight. It is undoubted that the tires that can be caught are retreaded. 6) In recent years, the development trend of foreign car tires is the increasing use of tires with large width, large inner diameter and low flat ratio. At present, domestically produced cars use more tires with small width, small inner diameter and high flat ratio. The tire with a high flat ratio has a long sidewall, a strong cushioning capacity, and relatively high comfort, but has a poor feeling on the road surface and a weak lateral resistance during cornering. Conversely, tires with a low flat ratio and a large inner diameter have a wide tread and a wide tread. Therefore, the grounding area is large, the tire can withstand the pressure, the response to the road surface is very sensitive, and the lateral resistance during cornering is strong, so that the handling of the vehicle is greatly enhanced. At present, the most flat tires used in mass-produced cars in China are 225/55R16, while many imported luxury cars or sports coupÃ©s have reached 225/45R17, and some even reach 245/40R18. After the vehicle is equipped with a tire with a large width, a large inner diameter and a low flat ratio, in addition to the strong maneuverability, the visual effect of the appearance is also very powerful. In general, the tires that are shipped from the factory are the best specifications that the manufacturer has chosen after repeated testing. If a car owner wants to change the size of the tire, it must be carried out under the guidance of a professional. It cannot be done at will, because it involves many problems, and a slight negligence may cause harm to driving safety. In addition, low flatness tires will appear more "supple", and should be more careful and cared for during use. Second, on the tire pattern The car relies on the tire to support the road surface, but the tire pattern is directly in contact with the road surface. The tire not only carries, rolls, but also generates the driving force for the driving, braking and steering of the car through the friction generated by its blocks and the road surface. The following is an analysis of the role of the tread pattern and the factors affecting the pattern. 1. The role of the tread pattern In short, the main function of the tread pattern is to increase the friction between the tread and the road surface to prevent the wheel from slipping, which is exactly the same as the sole pattern. The tread pattern improves the tread grounding elasticity. Under the action of the tangential force between the tread and the road surface (such as driving force, braking force and lateral force), the block can produce large tangential elastic deformation. As the tangential force increases, the tangential deformation increases, and the "friction effect" of the contact surface increases, thereby suppressing the tendency of the tread and the road surface to slip or slip. This largely eliminates the disadvantages of unpatterned (light tread) tires that are slippery, resulting in automotive performance related to friction between the tire and the roadâ€”power, braking, steering, and driving safety. There is a reliable guarantee for normal play. Studies have shown that the factors that produce the friction between the tread and the road surface include the adhesion between the two faces, the molecular gravitational effect, and the micro-cutting effect of the small-scale rain micro-convex on the tread surface, but it plays a major role. Still the elastic deformation of the block. 2. Factors Affecting the Effect of the Pattern The factors affecting the pattern effect have many factors affecting the pattern effect, but the factors that play a major role and are related to the use of the automobile are the pattern type and the pattern depth. 1) The influence of the pattern type: There are various types of tire patterns, but in summary, there are mainly three types: ordinary patterns, cross-country patterns and mixed patterns. (1), common pattern: ordinary pattern is suitable for use on hard road. It is divided into vertical patterns, horizontal patterns and vertical and horizontal patterns. a), longitudinal pattern: The common feature of the longitudinal pattern is that the tread is continuous in the longitudinal direction and the transverse direction is broken. Therefore, the longitudinal rigidity of the tread is large, and the lateral stiffness is small. The anti-slip ability of the tire is strong and weak. The tire of this pattern has less rolling resistance and good heat dissipation performance, but the pattern groove is easy to be embedded in the gravel. Taken together, this type of pattern is suitable for driving on a clean, good hard road. For example, cars, light and mini trucks, etc., choose this pattern. b) Horizontal pattern: The common feature of the horizontal pattern is that the tread is transversely continuous and longitudinally broken, so that the tread has a large lateral stiffness and a small longitudinal stiffness. Therefore, the tire's anti-sliding ability is vertical and weak. When the car is turning at a higher speed, it is easy to skid; the rolling resistance of the tire is also relatively large, and the tread wear is relatively serious. This type of pattern is suitable for medium or heavy-duty trucks with a relatively high traction on a general hard road. c) Vertical and horizontal patterns: This pattern is between the vertical and horizontal patterns. There is generally a meandering longitudinal pattern in the middle of the tread, and a transverse pattern on both sides of the shoulder. In this way, the vertical and horizontal anti-sliding ability of the countertop is better. Therefore, this type of tire has strong adaptability and wide application range, and it is suitable for different hard roads as well as for cars and trucks. (2) Cross-country pattern: The common feature of cross-country pattern is that the pattern groove is wide and deep, and the grounding area of â€‹â€‹the block is relatively small (about 40%~60%). When driving on a soft road surface, a part of the soil will be embedded in the groove of the pattern, and the part of the soil embedded in the groove must be sheared before the tire may slip. Therefore, the gripping force of the pattern is larger. Root test, on the muddy road, the traction of the same model vehicle using the cross-country pattern wheel can reach 1.5 times of the ordinary pattern. Cross-country patterns are divided into two types: undirected and directional. The directional pattern is directional when used. Off-road tires are suitable for use on rugged roads, soft dirt roads and roadless areas. Since the contact pressure of the block is large and the rolling resistance is large, it is not suitable for long-term driving on a good hard road surface. Otherwise, the tire wear will be aggravated, the fuel consumption will be increased, and the vehicle running vibration will be more severe. (3) Mixed pattern: The mixed pattern is a transitional pattern between the common pattern and the cross-country pattern. It is characterized in that the middle part of the tread has narrow groove grooves with different directions or mainly in the longitudinal direction, and on both sides, wide groove grooves with different directions or transverse directions are used. This pattern matching makes the mixed pattern have good comprehensive performance and strong adaptability. It is suitable for both good hard pavement and gravel pavement, slush pavement and soft pavement. The adhesion performance is better than ordinary pattern, but the wear resistance is less. At present, some trucks and four-wheel drive passenger cars use this type of pattern tires. In addition to the above three patterns, there are the following three patterns: single-guide pattern, block pattern, and asymmetrical pattern. (4) Single guide pattern: The single guide pattern is that the grooves are connected to each other and have an independent block structure. It has excellent braking performance, excellent drainage performance, excellent stability in rainy weather, and is suitable for high speed driving. However, the tire must be installed in the same position as the driving direction. Suitable for use in high speed cars. (5) Block pattern: The grooves are connected to each other and have an independent block structure. Excellent braking and handling performance, superior handling and stability on snow and wet roads, and good drainage performance in rainy days. However, its independent block structure has poor wear resistance. Scope of application: All-weather and snow tires for cars, rear wheels for commercial vehicles. (6) Asymmetric pattern The pattern of the left and right sides of the tread of the asymmetric pattern is different. Because it increases the landing pressure of the outer pattern during cornering, the high-speed cornering performance is greatly improved, and the wear resistance of the outer pattern is complemented. But you must pay attention to the correct installation direction of the tire. More suitable for competitive cars and high-performance vehicles. 2) The influence of the depth of the pattern. The deeper the pattern, the larger the amount of elastic deformation of the grounding of the block, and the rolling resistance caused by the elastic hysteresis loss of the tire will also increase. The deeper pattern is not conducive to the heat dissipation of the tire, so that the temperature rise of the tire is accelerated, and the root of the pattern is easily torn and peeled off due to severe punishment. Too shallow a pattern not only affects its water storage and drainage capacity, but also easily produces harmful "water skiing phenomenon", and highlights the drawbacks of light tread tires that are easy to slip, thus deteriorating the performance of the aforementioned car. Therefore, the pattern is too deep and too shallow. The objective law of surface is that the pattern in use will become smaller and smaller. In order to ensure the effectiveness of the pattern, countries around the world have established clear regulations on the tread wear limit. The tire wear limit warning mark "" or (and) "TWI" English mark is molded at several aliquots of the tire shoulder along the circumference. When the block convex wear distance is about 1.6mm (1/16 inch) from the bottom of the groove, the pattern at the mark has been smoothed, so that a narrow horizontal strip of tread is exposed, thereby warning the driver that the Itâ€™s time for the tires to be replaced.

Http://?&fid=55&id=1775

For more information on auto parts, please pay attention: autohao128

China Hardware Business Network

Http://news.chinawj.com.cn The most complete knowledge of car tires

Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn The most complete knowledge of car tires

Slewing Bearing

Swing bearing

1.We own the most advanced production machine in China ,can supply you it with highest precision .

2.we have the most professional technologist,they have been worked for worldwide famous slewing bearing

company for years .

3.we supply slewing bearing for many Chinese excavator /loader factories .

4.There are many types of it in stock ,Low MOQ is accepted and can delivery your goods asap.

5.Professional installation is highly recommended.

About our Slewing Rings

Name	slewing ring bearing / Excavator SWING CIRCLE
Suitable Brand	Excavator
Suitable Model	Excavator
Original	China
AplliCartion	Excavator
Warranty	One year
Delivery time	wihtin 3 days after payment confirmed
MOQ	1 set
Packing	standard export carton & wooden case or as your require

Many types of excavator slewing bearing for your purchase.

Excavator Brand	Model No.
Excavator	PC30	PC40	PC60-6 (Z=76)	PC60-6 (Z=80)	PC60-7 (Z=76)
	PC70-7	PC75U	PC90	PC90-6	PC100-5
	PC120-5	PC120-6 (4D95)	PC120-6 (4D102)	PC130-7	PC128UU
	PC150-5	PC20HT	PC200-1	PC200-2	PC200-3
	PC220-3	PC220-5	PC200-6 (S6D95)	PC200-6P (S6D102)	PC200-7 (Z=92)
	PC220-7	PC228UU	PC300-2	PC300-3	PC300-5
	PC300-6	PC300-7	PC350-6	PC360-7	PC400-3
	PC400-5	PC400-6	PC450
Excavator	HD450-7	HD512	HD100	HD700-1	HD700-2
	HD700-5	HD700-7	HD770SE	HD770-1	HD770-2
	HD800-7	HD820-1	HD900-7	HD1250-5	HD250-5
	HD250-7	HD307	HD516	HD400-7	HD450-5
Excavator
	Excavator	EX60-1	EX60-2	EX60-3	EX60-5	EX90
		EX100-1	EX100-3	EX100-5	EX120-1	EX120-2
EX200-3		EX200-5	EX210-5	ZX120	ZX160
EX200-1		EX200-2	EX200-3	EX200-5	EX210-5
ZX200		ZX200-3	ZX225	EX220-5	ZX230
ZX240		ZX270	EX300-1	EX300-2	EX300-3
EX300-5		ZX330	EX450	ZX480
Excavator	DH55-5	DH60-7	DH150-7	DH200-3	DH220-3
	DH102	DH225-7	DH258-7	DH280	DH290
	DH300-5	DH320	DH330-3	DH360-5	DH500
Excavator	SK03	SK09	SK907B	SK100	SK120-5
	SK200-1	SK200-2	SK200-5	SK200-6	SK200-8
	SK230-6	SK300	SK350-8
Excavator	SH120A2	SH120A3	SH200A1	SH200A2	SH200A3
	SH200G3	SH200C3	SH210A3	SH220A1	SH225
	SH260	SH265	SH280	SH300/A2	SH340
	SH350	SH430	SH40T	SH580
Excavator	R60-5	R60-7	R80-7	R130-5	R130-7
	R140	R150W	R170	R200	R210-3
	R220-5	R210-9	R215-7	R225-7	R245
	R260-5	R280	R290	R300	R305-7
	R320	R335-7	R360	R450
Excavator	EC55	EC210	EC240	EC290	EC360

Excavator swing bearing is divided into various specifiCartions:

1.single-row ball slewing bearings with outer teeth or inner teeth , or without teeth;

2.single-row cross roller slewing bearings;

3.double-row different diameter balls slewing bearings;

4.three-row roller slewing bearings and etc.

AppliCartion:

1.Construction Machinery : Cranes, Excavators

2.Mining/Heavy Equipments

3.Port/Marine/Offshore Machinery

4.Forest Industries Equipment

The single-row four points contact ball Slewing Bearing is composed of 2 seat-rings.It features compact in design,and light in weight.

The balls contact with the circular race at four points,via which the axial force,radial force and resultant moment may be born simultaneously.

It may be used for slewing conveyers,welding arms and positioners,light,medium duty cranes,excavators and other engineering machines.

Slewing Ring Bearing Features:

1.High load-carrying capability

2.Ability to accept the combined loads;axial ,radial and tilting moments

3.Flexibility with product design.

4.42CrMo/50Mn material be used to make slewing ring bearing

Product Catalog

1. Single row four point contact ball series.
2. Single-row crossed roller series.
3. Double row ball series.
4. Three-row roller series.
5. Roller and ball combination series.
6. Lightweight outline slewing ring.

Slew bearing for Single-row ball(HS Series)

1. Id:320-4500 Od:550-4500mm
2.material: 52Mn,42CrMo
3.OME service
4.ISO9001-2000 certifiCarte
5.R&D capacity

6.Tolerance:ABEC-1 standard

7.Basic loading rating:Dynamic & Static depend on different model

Dimensions					Mount dimensions			Number of holes		Gear parameters				Designation
mm					mm			Number of holes		m	mm	z	mm
D	d	T	H	h	D1	d1	dn	n	n1	m	Da	z	b
662	458	80	70	10	626	494	18	20	4	5	689	135	60	011.30.560
662	458	80	70	10	626	494	18	20	4	6	688.8	112	60	012.30.560
732	528	80	70	10	696	564	18	24	4	6	772.8	126	60	011.30.630
732	528	80	70	10	696	564	18	24	4	8	774.4	94	60	012.30.630
812	608	80	70	10	776	644	18	24	4	6	850.8	139	60	011.30.710
812	608	80	70	10	776	644	18	24	4	8	854.4	104	60	012.30.710
922	678	100	20	10	878	722	22	30	6	8	966.4	118	80	011.40.800
922	678	100	20	10	878	722	22	30	6	10	968	94	80	012.40.800
1022	778	100	90	10	978	822	22	30	6	8	1062.4	130	80	011.40.900
1022	778	100	90	10	978	822	22	30	6	10	1068	104	80	012.40.900
1122	878	100	90	10	1078	922	22	36	6	10	1188	116	80	011.40.1000
1122	878	100	90	10	1078	922	22	36	6	12	1185.6	96	80	012.40.1000

Crane Slewing Bearing,Turntable Slewing Ring Bearing,Excavator Turntable Slewing Ring Bearing,,Four Point Slewing Ring Bearing

Shijiazhuang Longshu Mechanical & Electrical Equipment Trading Co., Ltd. , https://www.longsbearing.com