Product Description

DAC25550043 DAC Ball Bearing for Rear Axle

Product Description

1. Bearing Factory more than 20 years
2. Own brand :NMN bearing  
3. OEM Accepted. 
4.ISO9001  ISO14001
The type of  bearings , component materials used will etermine the life span, reliability and performance of the bearings. However, there are many factors affecting the performance of the bearings which include the selection of the load carrying capacity, the rolling contact conditions, and the cleanliness of the operating environment and the dimensional stability of the bearing components.
Technical information:

Bearing   No.	GERMANY	SWEDEN	JAPAN	Dimension(mm)				kg
				d1	D	B	C
DAC25525716	565592			25	52	20.6	20.6	0.19
DAC25520037	156704			25	52	37	37	0.31
DAC25520042				25	52	42	42	0.36
DAC25520043	546467/576467			25	52	43	43	0.36
DAC25550043		617546A	25BWD01	25	55	43	43	0.44
DAC25560032	445979	BT2B445539AA		25	56	32	32	0.34
DAC29530037	857123AB			29	53	37	37	0.35
DAC30600037		BAH5000		30	60	37	37	0.42
DAC30600337	529891AB			30	60.3	37	37	0.42
DAC30600337	545312/581736			30	60.3	37	37	0.42
DAC34620037	531910/561447	BA2B633313CA	30BWD07	34	62	37	37	0.41
DAC34640034		434201B/VKBA1307	30BWD07	34	64	34	34	0.43
DAC34640037	532066DE	BAHB311316B/3 0571 4		34	64	37	37	0.47
DAC34640037	540466B/8571	VKBA1382	34BWD03/ACA78	34	64	37	37	0.47
DAC34660037	559529/580400CA	605214/VKBA1306	34BWD04/BCA70	34	66	37	37	0.5
DAC35640037		BA2B3 0571 6	34BWD11	35	64	35	35	0.4
DAC35650035	546238A	636114A/479399	34BWD10B	35	65	35	35	0.4
DAC35650037		BAH0042		35	65	37	37	0.51
DAC35660032		BA2B443952/445620B		35	66	32	32	0.42
DAC35660033			35BWD19E	35	66	33	33	0.43
DAC35660037	544307C/581571A	445980A/BAH-5001A		35	66	37	37	0.48
DAC35680037	430042C	633676/BAH-0015		35	68	37	37	0.52
DAC35680037	541153A/549676	311309/BAH-571		35	68	37	37	0.52
DAC35720033	548083	633528F/633295B	35BWD21(4RS)	35	72	33	33	0.58
DAC35720033	548033	BAH0031		35	72	33	33	0.58
DAC3572571		BA2B445535AE	XGB 4571	35	72.04	33	33	0.58
DAC35725713/31	562686	456162/44762B	XGB 4571	35	72.02	33	31	0.54
DAC35720034	54 0571 /548376A	BAHB633669/BAH0013		35	72	34	34	0.58
DAC35770042		VKBA1343	35BWD06ACA111	34.99	77.04	42	42	0.86
DAC37720033		VKBA857	35BWD01C	37	72	33	33	0.51
DAC37720037		VKBA3763		37	72	37	37	0.59
DAC37725717	527631	BAH0051B		37	72.02	37	37	0.59
DAC37740045	541521C	BAH0012AM5S		37	74	45	45	0.79
DAC38700037	ZFRTBRGHOO37	633571CB		38	70	37	37	0.56
DAC38700038		35715A	37BWD01B	38	70	38	38	0.57
DAC38710033/30		BAHB636193C		37.99	71.02	33	30	0.5
DAC38710039	574795A	686908A	38BWD31CA53	37.99	71	39	39	0.62
DAC38720036/33		FW135	38BWD09ACA120	38	72	36	33
DAC38720040	575069B	VKBA3929	30BWD22	38	72	40	40	0.63
DAC38730040			30BWD12	38	73	40	40	0.67
DAC38740036/33	574795A	VKBA1377		38	74	36	33	0.61

Our Products

Packaging & Shipping

Packaging & Shipping for High Precision ball bearing CZPT bearing series CZPT beaing.

Company Profile:

ZheJiang CZPT Bearing Group is a professional  bearing manufacturer and exporter in China. We have been engaged in bearing industry for 20 years.  Our company is specialized in producing Deep Groove Ball Bearings, Tapered Roller Bearings,Spherical Roller Bearings and Special Bearings in accordance with Customers’ designs. Our bearings  has been widely applied into agricutural equipments,home applicances, power equipments,machine tools,automotives and engineering machinery,etc.

Our production is strictly executed with ISO9001 and ISO14001. Our products are mainly exported to Singpore, South Korea,Vietnam,Thailand,Turkey,Pakistan,Australia,Poland,France,UK,South Africa, USD,South America and other countries and regions of the world, with great public praise of high quality and reasonable price.

We sincerely hope we can build a long term relationship with all the clients and we also have great confidence in cooperating with every potential customer by most premium service and competitive price. Welcome your inquiry and welcome your visit.

 
Research and Development
Since 2008, the Corporation has set up a Research & Development Center equipped with multiple laboratories used for precision measurement, mechanical testing, lifespan testing, and physicochemical testing, to continuously upgrade its skills and raise its manufacturing standard and product’s precision. Our workshops are installed with a series of advanced numerically-controlled, grinding and assembly equipment that utilize centralized filtration and cooling systems. Together with the production equipment suppliers, we developed these grinding, ultra-precision, fully automated integrated production lines, and own the intellectual property rights. The precision level of the products are at P5 level and above, with noise level CZPT Z4, V4 and above. Some of our projects have exceeded the 30% precision reserves. Our products are widely used in electric motors, automobiles, motorcycles, household appliances, textile, electric tools and water pump equipment industries, both locally and globally. 

Why Choose US

Quality Assurance
Product quality is the lifeline of an enterprise. In order to possessing the leading technology, our company implements the quality control system and establishes a technical and strict inspection team. As per the regulation of three-dimensional management and multiple checks, each product was inspected by the producer, inspector, inspection department and quality department elaborately, especially to the important inspection items and precision inspection item. 

Exhibition Photo Gallery

 

ZheJiang CZPT Bearing Co., Ltd. is a specialized manufacturer of ball bearings for about 20 years. Our main products include:
1, Miniature Bearings: like 608, 609, 625, 626, 693, 695, etc;
2, Deep Groove Ball Bearings: like 6000, 6200, 6300, 6800, 6900, 16000 Series;
3,Non-Standard Bearings: U grooved bearings, V grooved bearings, double grooved bearings, bearing rollers with or without plastic injection. 4,Pillow Block Bearing: UCP/ UCF/ UCFL;
5,Tapered Roller Bearings
6,Linear Motion Bearing
Other  products shows

 

Your Exclusive Consultant—-Swift
 
ZheJiang CZPT Bearing Co.,Ltd

 
 

Types of Screw Shafts

Screw shafts come in various types and sizes. These types include fully threaded, Lead, and Acme screws. Let’s explore these types in more detail. What type of screw shaft do you need? Which 1 is the best choice for your project? Here are some tips to choose the right screw:

Machined screw shaft

The screw shaft is a basic piece of machinery, but it can be further customized depending on the needs of the customer. Its features include high-precision threads and ridges. Machined screw shafts are generally manufactured using high-precision CNC machines or lathes. The types of screw shafts available vary in shape, size, and material. Different materials are suitable for different applications. This article will provide you with some examples of different types of screw shafts.
Ball screws are used for a variety of applications, including mounting machines, liquid crystal devices, measuring devices, and food and medical equipment. Various shapes are available, including miniature ball screws and nut brackets. They are also available without keyway. These components form a high-accuracy feed mechanism. Machined screw shafts are also available with various types of threaded ends for ease of assembly. The screw shaft is an integral part of linear motion systems.
When you need a machined screw shaft, you need to know the size of the threads. For smaller machine screws, you will need a mating part. For smaller screw sizes, the numbers will be denominated as industry Numeric Sizes. These denominations are not metric, but rather in mm, and they may not have a threads-per-inch designation. Similarly, larger machine screws will usually have threads that have a higher pitch than those with a lower pitch.
Another important feature of machine screws is that they have a thread on the entire shaft, unlike their normal counterparts. These machine screws have finer threads and are intended to be screwed into existing tapped holes using a nut. This means that these screws are generally stronger than other fasteners. They are usually used to hold together electronic components, industrial equipment, and engines. In addition to this, machine screws are usually made of a variety of materials.

Acme screw

An Acme screw is the most common type of threaded shaft available. It is available in a variety of materials including stainless steel and carbon steel. In many applications, it is used for large plates in crushing processes. ACME screws are self-locking and are ideal for applications requiring high clamping force and low friction. They also feature a variety of standard thread forms, including knurling and rolled worms.
Acme screws are available in a wide range of sizes, from 1/8″ to 6″. The diameter is measured from the outside of the screw to the bottom of the thread. The pitch is equal to the lead in a single start screw. The lead is equal to the pitch plus the number of starts. A screw of either type has a standard pitch and a lead. Acme screws are manufactured to be accurate and durable. They are also widely available in a wide range of materials and can be customized to fit your needs.
Another type of Acme screw is the ball screw. These have no back drive and are widely used in many applications. Aside from being lightweight, they are also able to move at faster speeds. A ball screw is similar to an Acme screw, but has a different shape. A ball screw is usually longer than an Acme screw. The ball screw is used for applications that require high linear speeds. An Acme screw is a common choice for many industries.
There are many factors that affect the speed and resolution of linear motion systems. For example, the nut position and the distance the screw travels can all affect the resolution. The total length of travel, the speed, and the duty cycle are all important. The lead size will affect the maximum linear speed and force output. If the screw is long, the greater the lead size, the higher the resolution. If the lead length is short, this may not be the most efficient option.

Lead screw

A lead screw is a threaded mechanical device. A lead screw consists of a cylindrical shaft, which includes a shallow thread portion and a tightly wound spring wire. This spring wire forms smooth, hard-spaced thread convolutions and provides wear-resistant engagement with the nut member. The wire’s leading and trailing ends are anchored to the shaft by means appropriate to the shaft’s composition. The screw is preferably made of stainless steel.
When selecting a lead screw, 1 should first determine its critical speed. The critical speed is the maximum rotations per minute based on the natural frequency of the screw. Excessive backlash will damage the lead screw. The maximum number of revolutions per minute depends on the screw’s minor diameter, length, assembly alignment, and end fixity. Ideally, the critical speed is 80% of its evaluated critical speed. A critical speed is not exceeded because excessive backlash would damage the lead screw and may be detrimental to the screw’s performance.
The PV curve defines the safe operating limits of a lead screw. This relationship describes the inverse relationship between contact surface pressure and sliding velocity. As the PV value increases, a lower rotation speed is required for heavier axial loads. Moreover, PV is affected by material and lubrication conditions. Besides, end fixity, which refers to the way the lead screw is supported, also affects its critical speed. Fixed-fixed and free end fixity are both possible.
Lead screws are widely used in industries and everyday appliances. In fact, they are used in robotics, lifting equipment, and industrial machinery. High-precision lead screws are widely used in the fields of engraving, fluid handling, data storage, and rapid prototyping. Moreover, they are also used in 3D printing and rapid prototyping. Lastly, lead screws are used in a wide range of applications, from measuring to assembly.

Fully threaded screw

A fully threaded screw shaft can be found in many applications. Threading is an important feature of screw systems and components. Screws with threaded shafts are often used to fix pieces of machinery together. Having fully threaded screw shafts ensures that screws can be installed without removing the nut or shaft. There are 2 major types of screw threads: coarse and fine. When it comes to coarse threads, UTS is the most common type, followed by BSP.
In the 1840s, a British engineer named Joseph Whitworth created a design that was widely used for screw threads. This design later became the British Standard Whitworth. This standard was used for screw threads in the United States during the 1840s and 1860s. But as screw threads evolved and international standards were established, this system remained largely unaltered. A new design proposed in 1864 by William Sellers improved upon Whitworth’s screw threads and simplified the pitch and surface finish.
Another reason for using fully threaded screws is their ability to reduce heat. When screw shafts are partially threaded, the bone grows up to the screw shaft and causes the cavity to be too narrow to remove it. Consequently, the screw is not capable of backing out. Therefore, fully threaded screws are the preferred choice for inter-fragmentary compression in children’s fractures. However, surgeons should know the potential complication when removing metalwork.
The full thread depth of a fully threaded screw is the distance at which a male thread can freely thread into the shaft. This dimension is typically 1 millimeter shy of the total depth of the drilled hole. This provides space for tap lead and chips. The full-thread depth also makes fully threaded screws ideal for axially-loaded connections. It is also suitable for retrofitting applications. For example, fully threaded screws are commonly used to connect 2 elements.

Ball screw

The basic static load rating of a ball screw is determined by the product of the maximum axial static load and the safety factor “s0”. This factor is determined by past experience in similar applications and should be selected according to the design requirements of the application. The basic static load rating is a good guideline for selecting a ball screw. There are several advantages to using a ball screw for a particular application. The following are some of the most common factors to consider when selecting a ball screw.
The critical speed limit of a ball screw is dependent on several factors. First of all, the critical speed depends on the mass, length and diameter of the shaft. Second, the deflection of the shaft and the type of end bearings determine the critical speed. Finally, the unsupported length is determined by the distance between the ball nut and end screw, which is also the distance between bearings. Generally, a ball screw with a diameter greater than 1.2 mm has a critical speed limit of 200 rpm.
The first step in manufacturing a high-quality ball screw is the choice of the right steel. While the steel used for manufacturing a ball screw has many advantages, its inherent quality is often compromised by microscopic inclusions. These microscopic inclusions may eventually lead to crack propagation, surface fatigue, and other problems. Fortunately, the technology used in steel production has advanced, making it possible to reduce the inclusion size to a minimum. However, higher-quality steels can be expensive. The best material for a ball screw is vacuum-degassed pure alloy steel.
The lead of a ball screw shaft is also an important factor to consider. The lead is the linear distance between the ball and the screw shaft. The lead can increase the amount of space between the balls and the screws. In turn, the lead increases the speed of a screw. If the lead of a ball screw is increased, it may increase its accuracy. If not, the lead of a ball screw can be improved through preloading, lubrication, and better mounting accuracy.