pillow block bearing

A pillow block bearing (plummer block) is a mounted bearing used to provide support for a rotating shaft with the mounting surface on a parallel line with the axis of the shaft.
The bearing housing mounts to a surface parallel to the shaft axis. Selection of the appropriate bearings can be accomplished based on the shaft size and the radial and thrust load requirements. Pillow block bearings are designed to support a shaft: the mounting surface is on a parallel line with the axis of the shaft. Elongated bolt holes in the base or feet of the unit allow for some adjustment and easy mounting of the pillow block bearing.
Certain dimensions and measurements of pillow block bearings are critical to selecting the right pillow block—whether original to the equipment or as a replacement. The shaft diameter is matched with the appropriate corresponding bore dimensions of the bearing unit. If a properly sized unit matching the shaft is selected, the bearing will easily slide onto the shaft and into position, ready to be secured by the locking device. Shaft height also known as backing height is determined by measuring the distance from the base (or bottom) of the pillow block to the center of the inner ring or shaft. Lastly, the distance between the bolt hole centers is taken from the center of one elongated bolt hole to the center of the housing’s other bolt hole.
Housing material for a pillow block bearing is typically made of cast iron or pressed steel. Pillow block bearings are extensively used in conveyor systems such as tube chain conveyors. Most pillow block bearings are self-lubricating.

Ball screw

A ball screw is a mechanical device for translating rotational motion to linear motion. A threaded shaft provides a spiral raceway for ball bearings which act as a precision screw. As well as being able to apply or withstand high thrust loads they can do so with minimum internal friction. They are made to close tolerances and are therefore suitable for use in situations in which high precision is necessary. The ball assembly acts as the nut while the threaded shaft is the screw.
These items, in contrast to conventional leadscrews, tend to be rather bulky, due to the need to have a mechanism to re-circulate the balls.
To maintain their inherent accuracy and ensure long life, great care is needed to avoid contamination with dirt and abrasive particles. This may be achieved by using rubber or leather bellows to completely or partially enclose the working surfaces. Another solution is to use a positive pressure of filtered air when they are used in a semi-sealed or open enclosure.
While reducing friction, ball screws can operate with some preload, effectively eliminating backlash (slop) between input (rotation) and output (linear motion). This feature is essential when they are used in computer-controlled motion-control systems, e.g. CNC machine tools and high precision motion applications (eg wire bonding).
Due to their low internal friction, ball screws can be back-driven (depending upon their lead angle). They are usually undesirable for hand-fed machine tools, as the stiffness of a servo motor is required to keep the cutter from grabbing the work and self feeding, that is, where the cutter and workpiece exceed the optimum feedrate and effectively jam or crash together, ruining the cutter and workpiece. Cost is also a major factor as Acme screws are cheaper to manufacture.
Low friction in ball screws yields high mechanical efficiency compared to alternatives. A typical ball screw may be 90 percent efficient, versus 50 percent efficiency of an Acme lead screw of equal size. The higher cost of ball screws may thus be offset by lower power requirements for the same net performance.
Ball screw shafts may be fabricated by rolling, yielding a less precise, but inexpensive and mechanically efficient product. Rolled ball screws have a positional precision of several thousandths of an inch per foot. High-precision types are ground, and are typically precise to one thousandth of an inch per foot or better.

Needle Roller Bearing

A needle roller bearing is a bearing which uses small cylindrical rollers. They are used to reduce friction of a rotating surface.
Needle bearing have a large surface area that is in contact with the bearing outer surfaces compared to ball bearings. Additionally there is less added clearance (difference between the diameter of the shaft and the diameter of the bearing) so they are much more compact. The typical structure consists of an inner race (or sometimes merely a shaft), a needle cage which orients and contains the needle rollers, the needle rollers themselves, and an outer race.
Radial needle bearings are cylindrical and use rollers parallel to the axis of the shaft. Thrust needle bearings are flat and use a radial pattern of needles. Headsets use a crooked pattern, so they are able to absorb both parallel and thrust power impacts.
Needle bearings are heavily used in engine components such as rocker arm pivots, pumps, compressors, and transmissions. The drive shaft of a rear-wheel drive vehicle typically has at least 8 needle bearings (4 in each U joint) and often more if it is particularly long, or operates on steep slopes.

Self-aligning ball bearings

Self-aligning ball bearings are constructed with the inner ring and ball assembly contained within an outer ring that has a spherical raceway. This construction allows the bearing to tolerate a small angular misalignment resulting from deflection or improper mounting.
1. The self-aligning ball bearing has two rows of balls and a common concave sphered raceway in the outer ring. The bearing is consequently self-aligning and insensitive to angular misalignments of the shaft relative to the housing. It is particularly suitable for applications where considerable shaft deflections or misalignment are to be expected. Additionally, the self-aligning ball bearing has the lowest friction of all rolling bearings, which enables it to run cooler even at high speeds.
2. Features:With two structures of bore cylindrical or tapered and retainers made of steel sheet or synthetic resins, the bearings are characteristic of their spherically formed outer ring raceways allowing for misalignment within 3 degree deflection between inner ring and outer ring, so as to compensate concentricity and deflection errors.
3. Applications:Widely used in machinery of mining, power, and textile etc.

Tapered Roller Bearing History , Applications

History
In 1898, Timken was awarded a patent for the tapered roller bearing. At the time, Timken was a carriage-maker in St. Louis and held three patents for carriage springs. However, it was his patent for tapered roller bearings that allowed his company to become successful.
Tapered roller bearings were a breakthrough at the end of the 19th century because bearings used in wheel axles had not changed much since ancient times. They relied on bearings enclosed in a case that held lubricants. These were called “friction bearings” and depended on lubricants to function. Without proper lubrication, these bearings would fail due to excessive heat caused by friction. Timken was able to significantly reduce the friction on his bearings by using a “cup” and “cone” design incorporating tapered bearings which actually rolled, which reduced the load placed on the bearings by distributing the weight and load evenly across the cups, cones, and bearings.
Applications

In many applications tapered roller bearings are used in back-to-back pairs so that axial forces can be supported equally in either direction.
Pairs of tapered roller bearings are used in car and vehicle wheel bearings where they must cope simultaneously with large vertical (radial) and horizontal (axial) forces.

Tapered Roller Bearing

Tapered roller bearings are bearings that can take large axial forces (i.e. they are good thrust bearings) as well as being able to sustain large radial forces.
DescriptionThe inner and outer ring raceways are segments of cones and the rollers are also made with a taper so that the conical surfaces of the raceways and the roller axes if projected, would all meet at a common point on the main axis of the bearing.
This conical geometry is used as it gives a larger contact patch, which permits greater loads to be carried than with spherical (ball) bearings, while the geometry means that the tangential speeds of the surfaces of each of the rollers are the same as their raceways along the whole length of the contact patch and no differential scrubbing occurs. This avoids rapid wear and greatly reduces rolling friction.
The rollers are guided by a flange on the inner ring. This stops the rollers from sliding out at high speed due to their momentum.
The larger the half angles of these cones the larger the axial force that the bearing can sustain.
Tapered roller bearings are separable and have the following components: outer ring, inner ring, and roller assembly (containing the rollers and a cage). The non-separable inner ring and roller assembly is called the “cone”, and the outer ring is called the “cup”. Internal clearance is established during mounting by the axial position of the cone relative to the cup

Rolling-element bearing

A rolling-element bearing is a bearing which carries a load by placing round elements between the two pieces. The relative motion of the pieces causes the round elements to roll with very little rolling resistance and with little sliding.
One of the earliest and best-known rolling-element bearings are sets of logs laid on the ground with a large stone block on top. As the stone is pulled, the logs roll along the ground with little sliding friction. As each log comes out the back, it is moved to the front where the block then rolls on to it. You can imitate such a bearing by placing several pens or pencils on a table and placing your hand on top of them. See “bearings” for more on the historical development of bearings.
A rolling-element rotary bearing uses a shaft in a much larger hole, and cylinders called “rollers” tightly fill the space between the shaft and hole. As the shaft turns, each roller acts as the logs in the above example. However, since the bearing is round, the rollers never fall out from under the load.
Rolling-element bearings have the advantage of a good tradeoff between cost, size, weight, carrying capacity, durability, accuracy, friction, and so on. Other bearing designs are often better on one specific attribute, but worse in most other attributes, although fluid bearings can sometimes simultaneously outperform on carrying capacity, durability, accuracy, friction, rotation rate and sometimes cost. Only plain bearings have as wide use as rolling-element bearings.

categories of ceramic bearings

(1)deep groove ball bearings (for the technical level: P4, P5, P6, P0) Deep groove ball bearings, the most representative of the rolling bearing, a wide range of uses, affordable two-way axial and radial load capacity. Suitable for high-speed rotation and low noise, low-vibration forum steel bearings or not the application of heat, cold, corrosion, magnetic field, non-insulated, and other fields.
(2) the aligning ball bearingThe outer ring raceway of the aligning ball bearing is spherical, auto-aligning, can add the error caused by the different heart of axis and shaft deflection. It is used to have a shell with the axis of the heart or the axis of different parts of deflection and high-temperature, low cold, corrosive, non-magnetic fields, such as insulation requirements of aligning the site. Note: no more than 3 degrees inclination.
(3) single row angular contact ball bearings (for the technical level: P4, P5, P6, P0) The angular contact bearing is applicable to high-speed and high precision rotating. In high- temperature, magnetic field, and the water, its accuracy won’t be affected, and it can bear the load synthesis. Standards for the contact angle is of 15 °, 30 ° and 40 °, the greater the contact angle of the axial load capacity of the bigger, the smaller the contact angle of bearing affordable one-way axial and radial load capacity. Generally it is installed in pairs to take.

Blow Molding Machine Manufacturer & Supplier

Ambition Enterprise Co., Ltd is a plastic machinery and mould exporter and supplier from China. The factory got ISO9001 quality management system certificate. We provide all-around solution for plastic industry. Now we are supplying the following Plastic machinery and moulds.

Machineries:
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Molds:
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SKF bearings

SKF bearings SKF bearings SKF USA SKF Bearing Service SKF Bearing Servicesneedle bearings bearing housings tapered bearings tapered roller bearings metric bearings ball bearings cylindrical bearings cylindrical roller bearings pillow block bearings mounted bearings mounted roller bearings flange bearings super precision bearings precision bearings spindle bearings duplex bearings duplex spindle bearings spherical bearings spherical roller bearing, spherical roller bearings thrust bearing, thrust bearings angular contact bearing, angular contact bearings mounted ball bearing mounted ball bearings, roller bearing roller bearings SKF ball bearings SKF Bearing Company tapers taper bearings tapered bearing taper roller bearings idller bearings tapered roller bearings cones cups tapered sets metric sets metric tapered sets precision tapered assemblies tapered assemblies thrust bearings roller bearings roller thrust bearing thrust roller bearing precision bearings
SKF bearings provide the highest quality bearings with the longest possible service life. At Bearing Kinetics we sell most SKF bearings, including all the basic types of bearings like ball, cylindrical, tapered, spherical, plain and mounted. Sizes range from 1/2-inch OD ball bearings weighing less than an ounce to 76-inch OD slewing rings weighing more than 6 tons. Grades vary from ABEC 1, a relatively wide-tolerance industrial grade to ABEC 7 and 9 super-precision machine tool grade.

Deep Groove Ball Bearing

Deep Groove Ball Bearing is the most frequently roll bearing.Its configuration is simple, and it is used expediently.It is mainly used to support radial load.But when the bearing radial windage is increscent,it has stated capabilities of Angular Contact Bearing,which can support joint load coming from both radial and shaft.And when the rotate speed is high and it is not suitable to use Thrust Ball Bearing,the Deep ball bearing is often used to support pure shaft load.Compared with other type bearing in the same size,thus bearing has small friction coefficient but high high-point rotate speed.Yet,it is not able to bear concussion,and that is incongruous to support over loading.
When the Deep ball bearing has been fixed on the shaft,it can restrict shaft displacement between the shaft and crust,in order to act as shaft orientation between the two direction.Further thus bearing take on stated adjustment center ability,videlicet the bearing is gradient about 2′～10′relative to the crust hole,it also can work normally,which influences the bearing life-span.Deep ball bearing holding frame is most armor plate pressing wave holding frame,but large bearing often adopts metal entity holding frame.Deep ball bearing is diffusely used on automobile,tractor,machine tool,electric machine,water pump,agriculture machine and weave machine etcs.
1) Model: Open, Z, ZZ, RZ,2RZ,RS, 2RS
2) Quality level: reach the same level as the Japanese and European bearings
3) Tolerance level: ABEC-1 (P0), ABEC-3 (P6),ABEC-5(P5)
4) Noise Level: EMQ V1 Z2, EMQ V2 Z3, EMQ V3 Z4, EMQ V4
5) Application: home appliances,low noise and high speed electric motors; automotive components, pumps, machinery.
Deep Groove Ball Bearings include Single Row Deep Groove Ball Bearing, Double Row Deep Groove Ball Bearing, Sielded Deep Groove Ball Bearing, Sealed Deep Groove Ball Bearing, One Direction Deep Groove Ball Bearing, Open Type Deep Groove Ball Bearing.

Linear Motion Bearing

A linear motion bearing or slide is a bearing designed to provide free motion in one dimension. There are many different types of linear motion bearings and this family of products is generally broken down into two sub-categories: rolling-element and plane.

Thrust Bearing, Thrust Ball Bearing

A thrust bearing is a particular type of rotary bearing. Like other rotary bearings they permit rotation between parts, but they are designed to support a high axial load while doing this.
Thrust bearings come in several varieties.
Ball thrust bearings, composed of ball bearings supported in a ring, can be used in low thrust applications where there is little radial load. Tapered roller bearings consist of small tapered rollers arranged so that their axes all converge at a point on the axis of the bearing. The length of the roller and the diameter of the wide and the narrow ends need to be carefully calculated to provide the correct taper so that each end of the roller rolls smoothly on the bearing face without skidding. These are the type most commonly used in automotive applications (to support the wheels of a motor car for example), where they are used in pairs to accommodate axial thrust in either direction, as well as radial loads. They can support rather larger thrust loads than the ball type due to the larger contact area, but are more expensive to manufacture. Fluid bearings where the axial thrust is supported on a thin layer of pressurized liquid - these give incredibly low drag. They are commonly used in automotive, marine, and aerospace applications.
Thrust bearings are used in cars because the forward gears in modern car gearboxes use helical gears which, while aiding in smoothness and noise reduction, cause axial forces that need to be dealt with. André Citroën invented a double helical gear which neutralized the thrust caused by normal helical gears.
One specific thrust bearing in an automobile is the clutch 'throw out' bearing, sometimes called the clutch release bearing.
Fluid-film thrust bearings were invented by Australian engineer George Michell (pronounced Mitchell) who patented his invention in 1905. Michell bearings contain a number of sector-shaped pads, arranged in a circle around the shaft, and which are free to pivot. These create wedge-shaped regions of oil inside the bearing between the pads and a rotating disk, which support the applied thrust and eliminate metal-on-metal contact.
The small size (one-tenth the size of old bearing designs), low friction and long life of Michell's invention made possible the development of larger propellers and engines in ships. They were used extensively in ships built during World War I, and have become the standard bearing used on turbine shafts in ships and power plants worldwide.

Ball Bearing History

Leonardo da Vinci has been credited with the discovery of the principle behind the mechanics of ball bearings.
The first patent was awarded to Jules Suriray, a Parisian bicycle mechanic, on 3rd August 1869. The bearings were then fitted to the winning bicycle ridden
by James Moore in the world's first bicycle road race, Paris-Rouen, in November 1869.
The modern, self-aligning design of ball bearing is attributed to Sven Wingquist of the SKF ball-bearing manufacturer in 1907.
Ball bearings were found on the Roman Nemi ships constructed in about 40 A.D.

Ball bearing

A ball bearing is an engineering term referring to a type of rolling-element bearing which uses balls to maintain the separation between the moving parts of the bearing.
The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. It achieves this by using at least two races to contain the balls and transmit the loads through the balls. Usually one of the races is held fixed. As one of the bearing races rotates it causes the balls to rotate as well. Because the balls are rolling they have a much lower coefficient of friction than if two flat surfaces were rotating on each other.
Ball bearings tend to have lower load capacity for their size than other kinds of rolling-element bearings due to the smaller contact area between the balls and races. However, they can tolerate some misalignment of the inner and outer races.
Compared to other bearing types, the ball bearing is the least expensive, primarily because of the low cost of producing the balls used in the bearing.

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WTOO Bearing Co.,Ltd.

WTOO Industrial Co., Ltd. is dedicated ourselves to high-precision mini-sized deep groove ball Bearings and automotive Bearings. Our products are widely used in the high speed electric motors in automobiles, vacuum cleaners, air conditioners and massagers etc.
The registered brand "WTOO" has become the well-known brand of China. Especially the 608 bearing for motor of vacuum cleaner, its rotate speed exceeds 50,000RPM.More than 1/3 vacuum cleaners in the world are running WTOO bearings. WTOO low noise bearings of 608 series have come into numerous households along with air conditioners.

We are a integrated corporation. It was established on March 2000, with Ningbo WTOO import & export Co., Ltd, Ningbo Da'er Bearing Co., Ltd and Ningbo Ningwei bearing Co.,Ltd as it's sub-companies.

website: http://www.wtoobearing.com

We obtained ISO-9001 and TS16949 certificate.

BREEZE MACHINERY INDUSTRY CORP., LTD.

BREEZE MACHINERY(PARTS) INDUSTRY CORP., LTD. act as the leading company of manufacturing and marketing Chinese bearings. Our vision to be an engineering and marketing oriented supplier of bearings and power transmission parts, to provide our customer with the quality products at the lowest possible price, your managed outsourcing.
With many years' experience we have cooperated with several factories and holding the concerned production company. We supply high quality ball bearing, roller bearing, wheel bearing, thrust bearing, needle bearing, mounted unit bearing, linear motion bearing, also customized bearing per drawing ... We have the advanced equipment, abundant R&D, technical resource, scientific management, strict process control and QC system. Most of our factories approved by ISO9001, ISO9002, QS9000, the automotive bearing factory verified by TS16949, VDA6.1
website: http://www.bearing-fastener.com

NEW CENTURY BEARING CO.,LTD

NEW CENTURY BEARING CO.,LTD is one of the leading bearing manufacturers in China, which was established in 1987. The company is specialized in producing Deep Groove Ball Bearing, Stainless Steel Ball Bearing, Non-standard Bearing and all kinds of bearing components (including: bearing ring, shield, seal and cage). It's products are widely used in Electric Motors, Fishing Tackles, Various Household Appliances, Automobile, Power Tools, Mechanical Devices. Especially our leading products: the 608 bearing for motor of Air Conditioners and the stainless steel ball bearing for Fishing Tackles, both of which enjoy very high reputation in relative industry field.

After 20 years development, our company has fixed assets RMB 50 million, annual output exceed 60 million pieces bearing, the area of the company covers 40000 square meters and 22000 square meters of building area, with more than 1000 employees in the company. Our products are well sold in The United States, Japan, Korea, Europe and so on.

website: http://www.sxabearing-manufacturers.com

Deep Groove Ball Bearing Catalog

Deep Groove Ball Bearings include Single Row Deep Groove Ball Bearing, Double Row Deep Groove Ball Bearing, Sielded Deep Groove Ball Bearing, Sealed Deep Groove Ball Bearing, One Direction Deep Groove Ball Bearing, Open Type Deep Groove Ball Bearing.

1) Model: Open, Z, ZZ, RZ,2RZ,RS, 2RS
2) Quality level: reach the same level as the Japanese and European bearings
3) Tolerance level: ABEC-1 (P0), ABEC-3 (P6),ABEC-5(P5)
4) Noise Level: EMQ V1 Z2, EMQ V2 Z3, EMQ V3 Z4, EMQ V4
5) Application: home appliances,low noise and high speed electric motors; automotive components, pumps, machinery.

Deep Groove Ball Bearing

Deep Groove Ball Bearing is the most frequently roll bearing.Its configuration is simple, and it is used expediently.It is mainly used to support radial load.But when the bearing radial windage is increscent,it has stated capabilities of Angular Contact Bearing,which can support joint load coming from both radial and shaft.And when the rotate speed is high and it is not suitable to use Thrust Ball Bearing,the Deep ball bearing is often used to support pure shaft load.Compared with other type bearing in the same size,thus bearing has small friction coefficient but high high-point rotate speed.Yet,it is not able to bear concussion,and that is incongruous to support over loading.
When the Deep ball bearing has been fixed on the shaft,it can restrict shaft displacement between the shaft and crust,in order to act as shaft orientation between the two direction.Further thus bearing take on stated adjustment center ability,videlicet the bearing is gradient about 2′～10′relative to the crust hole,it also can work normally,which influences the bearing life-span.Deep ball bearing holding frame is most armor plate pressing wave holding frame,but large bearing often adopts metal entity holding frame.Deep ball bearing is diffusely used on automobile,tractor,machine tool,electric machine,water pump,agriculture machine and weave machine etcs.

Ball Bearing Features

Features :
Shield / closure: open ball bearing, Z, ZZ, RS, 2RS,2RZ
Ball bearings snap ring: N, NR Tolerance codes: ABEC-1, ABEC-3, ABEC-5
Vibration level codes: V4, V3, V2, V1
Internal clearance codes: C2, C3, C4, C5
Ball bearings material: GCr15, SAE52100(USA), DIN100Cr6(Germany), BS535A99(UK)
Cage: SPCC, nylon66
Hardness for rings and balls: 60- - 65HRC
Lubrication: Oil, Grease