Product Description

Specifications of Bearing

Timken CZPT bearing CZPT CZPT CZPT Dodge Bearing, Auto/Agricultural Machinery Ball Bearing deep groove ball bearing wheel hub bearing skateboard bearing
HangZhou Flow Group Ltd. Virtually every type of ball and roller bearings. They are available in various cross sections and satisfy a huge variety of operating conditions and application performance requirements. 
A wide assortment of plain bearings, rod ends and bushings are also available to satisfy various oscillating movement needs. The design and material variants are extensive and offer an unparalleled selection from which to meet your application needs. 

Bearing characteristics: SKF  Deep groove ball bearing structure is simple, easy to use, mainly used to bear the radial load, is the most commonly used rolling bearings. 

Application: SKF Deep groove ball bearings can be used for gearboxes, instrumentation, motors, household appliances, internal combustion engines, traffic vehicles, agricultural machinery, construction machinery, engineering machinery, roller skating shoes, yo-yo, etc. 

Showing of Bearing

 

Parameters of Bearing

More details of wheel hub bearing 

Model NO.				d	D	H	Ç	m
	Germany	Sweden	Japan	Dimension (mm)				Weight (kg)
DAC25525716	565592			25	52	20.6	20.6	0.19
DAC25520037	156704			25	52	37	37	0.31
DAC25520042		617546A	25BWD01	25	52	42	42	0.36
DAC25520043	546467/576467	BT2B445539AA		25	52	43	43	0.36
DAC25550043				25	55	43	43	0.44
DAC25560032	445979	BAH5000		25	56	32	32	0.34
DAC29530037	857123AB			29	53	37	37	0.35
DAC30600037				30	60	37	37	0.42
DAC30600337	529891AB	BA2B633313CA	30BWD07	30	60.3	37	37	0.42
DAC30600337	545312/581736	434201B/VKBA1307	30BWD07	30	60.3	37	37	0.42
DAC34620037	531910/561447	BAHB311316B/3 0571 4		34	62	37	37	0.41
DAC34640034		VKBA1382	34BWD03/ACA78	34	64	34	34	0.43
DAC34640037	532066DE	605214/VKBA1306	34BWD04/BCA70	34	64	37	37	0.47
DAC34640037	540466B/8571	BA2B3 0571 6	34BWD11	34	64	37	37	0.47
DAC34660037	559529/580400 CA	636114A/479399	34BWD10B	34	66	37	37	0.5
DAC35640037		BAH0042		35	64	35	35	0.4
DAC35650035	546238A	BA2B443952/445620B		35	65	35	35	0.4
DAC35650037			35BWD19E	35	65	37	37	0.51
DAC35660032		445980A/BAH-5001A		35	66	32	32	0.42
DAC35660033		633676/BAH-0015		35	66	33	33	0.43
DAC35660037	544307C/581571A	311309/BAH-571		35	66	37	37	0.48
DAC35680037	430042C	633528F/633295B	35BWD21 (4RS)	35	68	37	37	0.52
DAC35680037	541153A/549676	BAH0031		35	68	37	37	0.52
DAC35720033	548083	BA2B445535AE	XGB 4571	35	72	33	33	0.58
DAC35720033	548033	456162/44762 B	XGB 4571	35	72	33	33	0.58
DAC3572571		BAHB633669/BAH0013		35	72.04	33	33	0.58
DAC35725713/31	562686	VKBA1343	35BWD06ACA111	35	72.02	33	31	0.54
DAC35720034	54 0571 /548376 A	VKBA857	35BWD01C	35	72	34	34	0.58
DAC35770042		VKBA3763		34.99	77.04	42	42	0.86
DAC37720033		BAH0051B		37	72	33	33	0.51
DAC37720037		BAH0012AM5S		37	72	37	37	0.59
DAC37725717	527631	633571CB		37	72.02	37	37	0.59
DAC37740045	541521C	35715A	37BWD01B	37	74	45	45	0.79
DAC38700037	ZFRTBRGHOO37	BAHB636193C		38	70	37	37	0.56
DAC38700038		686908A	38BWD31CA53	38	70	38	38	0.57
DAC38710033/30		FW135	38BWD09ACA120	37.99	71.02	33	30	0.5
DAC38710039	574795A	VKBA3929	30BWD22	37.99	71	39	39	0.62
DAC38720036/33			30BWD12	38	72	36	33
DAC38720040	575069B	VKBA1377		38	72	40	40	0.63
DAC38730040		VKBA3245	38BWD26E	38	73	40	40	0.67
DAC38740036/33	574795A	DAD3874368W	38BWD01ACA121	38	74	36	33	0.61

Packing&Delivery

Packing

A. Plastic box+outer carton+pallets
B. Plastic bag+box+carton+pallet
C. Tube package+middle box+carton+pallet
D. Of course we will also be based on your needs

Delivery

1. Most orders will be shipped within 3-5 days of payment being received. 
2. Samples will be shipped by courier as FedEx, UPS, DHL, etc. 
3. More than 3000 set bearings, it is recommended to be shipped by sea (sea transportation).  

Our Main Products

Our Company

HangZhou Flow Group Ltd is a professional manufacturer of bearings, collecting together production and processing, domestic and foreign trade. The factory specializes in the production and export of many kinds of bearings: Deep groove ball bearing, spherical roller bearing, tapered roller bearing, and so on. The customized bearings is also acceptable and the production will be according to your requirements and samples. 

All bearings in our factory adopt international quality standards. The complete equipment, strict quality control, advanced Japanese technology and quality service provide a guarantee to supply the high-quality bearings for our customers. Domestic sales and service network has covered 15 major cities in China, meanwhile our bearing has sold more than 60 overseas countries and regions. 

Our bearings have been widely used in agriculture, textiles, mining, printing and packaging industries, in addition to applications in airports, air conditioning systems, conveyors and ship also applied. 

If you are interested in any of our bearings or have an intention to order, please feel free to contact us.  

FAQ

SAMPLES
1. Samples quantity: 1-10 PCS are available. 
2. Free samples: It depends on the Model No., material and quantity. Some of the bearings samples need client to pay samples charge and shipping cost. 
3. It’s better to start your order with Trade Assurance to get full protection for your samples order. 

CUSTOMIZED
The customized LOGO or drawing is acceptable for us. 

MOQ
1. MOQ: 10 PCS mix different standard bearings. 
2. MOQ: 5000 PCS customized your brand bearings. 

OEM POLICY
1. We can printing your brand (logo, artwork)on the shield or laser engraving your brand on the shield. 
2. We can custom your packaging according to your design
3. All copyright own by clients and we promised don’t disclose any info. 

SUPORT
Please visit our Clunt bearings website, we strongly encourge that you can communicate with us through email, thanks! 

Contact Us

We have all kinds of bearings, just tell me your item number and quantity, best price will be offered to you soon
The material of the bearings, precision rating, seals type, OEM service, etc, all of them we can make according to your requirement

What Are Screw Shaft Threads?

A screw shaft is a threaded part used to fasten other components. The threads on a screw shaft are often described by their Coefficient of Friction, which describes how much friction is present between the mating surfaces. This article discusses these characteristics as well as the Material and Helix angle. You’ll have a better understanding of your screw shaft’s threads after reading this article. Here are some examples. Once you understand these details, you’ll be able to select the best screw nut for your needs.

Coefficient of friction between the mating surfaces of a nut and a screw shaft

There are 2 types of friction coefficients. Dynamic friction and static friction. The latter refers to the amount of friction a nut has to resist an opposing motion. In addition to the material strength, a higher coefficient of friction can cause stick-slip. This can lead to intermittent running behavior and loud squeaking. Stick-slip may lead to a malfunctioning plain bearing. Rough shafts can be used to improve this condition.
The 2 types of friction coefficients are related to the applied force. When applying force, the applied force must equal the nut’s pitch diameter. When the screw shaft is tightened, the force may be removed. In the case of a loosening clamp, the applied force is smaller than the bolt’s pitch diameter. Therefore, the higher the property class of the bolt, the lower the coefficient of friction.
In most cases, the screwface coefficient of friction is lower than the nut face. This is because of zinc plating on the joint surface. Moreover, power screws are commonly used in the aerospace industry. Whether or not they are power screws, they are typically made of carbon steel, alloy steel, or stainless steel. They are often used in conjunction with bronze or plastic nuts, which are preferred in higher-duty applications. These screws often require no holding brakes and are extremely easy to use in many applications.
The coefficient of friction between the mating surfaces of t-screws is highly dependent on the material of the screw and the nut. For example, screws with internal lubricated plastic nuts use bearing-grade bronze nuts. These nuts are usually used on carbon steel screws, but can be used with stainless steel screws. In addition to this, they are easy to clean.

Helix angle

In most applications, the helix angle of a screw shaft is an important factor for torque calculation. There are 2 types of helix angle: right and left hand. The right hand screw is usually smaller than the left hand one. The left hand screw is larger than the right hand screw. However, there are some exceptions to the rule. A left hand screw may have a greater helix angle than a right hand screw.
A screw’s helix angle is the angle formed by the helix and the axial line. Although the helix angle is not usually changed, it can have a significant effect on the processing of the screw and the amount of material conveyed. These changes are more common in 2 stage and special mixing screws, and metering screws. These measurements are crucial for determining the helix angle. In most cases, the lead angle is the correct angle when the screw shaft has the right helix angle.
High helix screws have large leads, sometimes up to 6 times the screw diameter. These screws reduce the screw diameter, mass, and inertia, allowing for higher speed and precision. High helix screws are also low-rotation, so they minimize vibrations and audible noises. But the right helix angle is important in any application. You must carefully choose the right type of screw for the job at hand.
If you choose a screw gear that has a helix angle other than parallel, you should select a thrust bearing with a correspondingly large center distance. In the case of a screw gear, a 45-degree helix angle is most common. A helix angle greater than zero degrees is also acceptable. Mixing up helix angles is beneficial because it allows for a variety of center distances and unique applications.

Thread angle

The thread angle of a screw shaft is measured from the base of the head of the screw to the top of the screw’s thread. In America, the standard screw thread angle is 60 degrees. The standard thread angle was not widely adopted until the early twentieth century. A committee was established by the Franklin Institute in 1864 to study screw threads. The committee recommended the Sellers thread, which was modified into the United States Standard Thread. The standardized thread was adopted by the United States Navy in 1868 and was recommended for construction by the Master Car Builders’ Association in 1871.
Generally speaking, the major diameter of a screw’s threads is the outside diameter. The major diameter of a nut is not directly measured, but can be determined with go/no-go gauges. It is necessary to understand the major and minor diameters in relation to each other in order to determine a screw’s thread angle. Once this is known, the next step is to determine how much of a pitch is necessary to ensure a screw’s proper function.
Helix angle and thread angle are 2 different types of angles that affect screw efficiency. For a lead screw, the helix angle is the angle between the helix of the thread and the line perpendicular to the axis of rotation. A lead screw has a greater helix angle than a helical one, but has higher frictional losses. A high-quality lead screw requires a higher torque to rotate. Thread angle and lead angle are complementary angles, but each screw has its own specific advantages.
Screw pitch and TPI have little to do with tolerances, craftsmanship, quality, or cost, but rather the size of a screw’s thread relative to its diameter. Compared to a standard screw, the fine and coarse threads are easier to tighten. The coarser thread is deeper, which results in lower torques. If a screw fails because of torsional shear, it is likely to be a result of a small minor diameter.

Material

Screws have a variety of different sizes, shapes, and materials. They are typically machined on CNC machines and lathes. Each type is used for different purposes. The size and material of a screw shaft are influenced by how it will be used. The following sections give an overview of the main types of screw shafts. Each 1 is designed to perform a specific function. If you have questions about a specific type, contact your local machine shop.
Lead screws are cheaper than ball screws and are used in light-duty, intermittent applications. Lead screws, however, have poor efficiency and are not recommended for continuous power transmission. But, they are effective in vertical applications and are more compact. Lead screws are typically used as a kinematic pair with a ball screw. Some types of lead screws also have self-locking properties. Because they have a low coefficient of friction, they have a compact design and very few parts.
Screws are made of a variety of metals and alloys. Steel is an economical and durable material, but there are also alloy steel and stainless steel types. Bronze nuts are the most common and are often used in higher-duty applications. Plastic nuts provide low-friction, which helps reduce the drive torques. Stainless steel screws are also used in high-performance applications, and may be made of titanium. The materials used to create screw shafts vary, but they all have their specific functions.
Screws are used in a wide range of applications, from industrial and consumer products to transportation equipment. They are used in many different industries, and the materials they’re made of can determine their life. The life of a screw depends on the load that it bears, the design of its internal structure, lubrication, and machining processes. When choosing screw assemblies, look for a screw made from the highest quality steels possible. Usually, the materials are very clean, so they’re a great choice for a screw. However, the presence of imperfections may cause a normal fatigue failure.

Self-locking features

Screws are known to be self-locking by nature. The mechanism for this feature is based on several factors, such as the pitch angle of the threads, material pairing, lubrication, and heating. This feature is only possible if the shaft is subjected to conditions that are not likely to cause the threads to loosen on their own. The self-locking ability of a screw depends on several factors, including the pitch angle of the thread flank and the coefficient of sliding friction between the 2 materials.
One of the most common uses of screws is in a screw top container lid, corkscrew, threaded pipe joint, vise, C-clamp, and screw jack. Other applications of screw shafts include transferring power, but these are often intermittent and low-power operations. Screws are also used to move material in Archimedes’ screw, auger earth drill, screw conveyor, and micrometer.
A common self-locking feature for a screw is the presence of a lead screw. A screw with a low PV value is safe to operate, but a screw with high PV will need a lower rotation speed. Another example is a self-locking screw that does not require lubrication. The PV value is also dependent on the material of the screw’s construction, as well as its lubrication conditions. Finally, a screw’s end fixity – the way the screw is supported – affects the performance and efficiency of a screw.
Lead screws are less expensive and easier to manufacture. They are a good choice for light-weight and intermittent applications. These screws also have self-locking capabilities. They can be self-tightened and require less torque for driving than other types. The advantage of lead screws is their small size and minimal number of parts. They are highly efficient in vertical and intermittent applications. They are not as accurate as lead screws and often have backlash, which is caused by insufficient threads.