April 25th, 2010 by admin

Feb 23, 2010 — Garden City Park, New York — Quality Bearings & Components – QBC announces a new addition to its line of reliable and cost-effective high-grade axial needle roller thrust bearings. This new line of metric axial needle roller thrust bearings feature steel needles and range in widths from 2 mm to 5 mm. These thrust bearings, identified as the BTHBNGMAXK… Series, are designed to fit shafts with diameters ranging from 4 mm to 160 mm. Outside diameters range from 14 mm to 200 mm. Axial thrust washers to fit these bearings are also stocked. Quotes plus online orders are available at the new QBC eStore. This quality design ensures reduced friction, quiet operating ability and increased durability.

QBC has in stock: miniature bearings, plastic bearings, rod end bearings, spherical bearings, pillow blocks, sintered bronze bushings, radial ball bearings, thrust bearings & washers, sleeve bearings, needle bearings, inner races, roller clutches, guide wheels & rail systems, linear ball bearings, inner and outer ring spacers and shafting. QBC stocks both inch and metric sizes. Our eStore allows you to check price and availability, place an order or request a quote anytime. QBC also provides custom-made bearings and shafting to the customer print. We also offer on-site relubing of bearings in a certified class 1000 clean room.

Detailed technical specifications are contained in catalog B620 available free upon request from Quality Bearings & Components. This catalog can be viewed now, in .pdf format, and downloaded by section on the web at www.qbcbearings.com, or via mail request at:
125 Railroad Avenue, Garden City Park, NY 11040-5016. Phone: 1 888 276-4787 Fax: 516 616-0443 Web: http://www.qbcbearings.com/Press/ThrustBearings.htm

February 6th, 2010 by admin

Ningbo Yinzhou Weixiang Auto Parts Co., Ltd. is a 21st century production infant enterprise located in economically developed seaside city – Ningbo.Our companyisespecially inproducingmotor vehicles. Motorcycle Muffler, Automobile wheel modified pieces, Offset pads, Flange, also we canmanage for the wheel screws and metal die-casting, sheet metal stamping drawing, metal processing, welding process of integration and so on . Anything else,we can develop new product and model, At present,The product we developare applied to many scopes by many car manufacturers in home and abroad .such as Europe and the United States. Southeast Asia. markets and so on.

SLIP-ON CONICAL SHAPED TWIN MUFFLER EXHAUST SYSTEM

Our sporty and lightweight SLIP-ON exhaust system offer a great balance between price and performance and represent the first step in the exhaust system tuning process. The change will be also visual as our conical mufflers add a clean racing image. The muffler outer sleeve is made of titanium, which gives a special hi-tech touch to our SLIP-ON system. The system was developed to complement the racing character of the GSX-R and is made entirely of our exclusive high grade titanium. System is street legal.
the leading company of manufacturing and marketing Chinese bearings.

Auto muffler, Muffler, Muffler exhaust, Muffler systems

February 6th, 2010 by admin

Ningbo Yinzhou Weixiang Auto Parts Co., Ltd. is a 21st century production infant enterprise located in economically developed seaside city – Ningbo.Our companyisespecially inproducingmotor vehicles. Motorcycle Muffler, Automobile wheel modified pieces, Offset pads, Flange, also we canmanage for the wheel screws and metal die-casting, sheet metal stamping drawing, metal processing, welding process of integration and so on . Anything else,we can develop new product and model, At present,The product we developare applied to many scopes by many car manufacturers in home and abroad .such as Europe and the United States. Southeast Asia. markets and so on.

Carbon Steel Flange
Our main products abide by Germany Standard DIN, American Standard ANSI B16. 5, British Standard BS4504, Japanese Standard JIS, Italy Standard UNI and Chinese Standard Flange Plate. Also we can produce any kind of non-standard flange plates and forgings according to the demands of the clients.
the leading company of manufacturing and marketing Chinese bearings.

Flange, Flange cover, Pe flange

April 1st, 2009 by admin

Rolling-element bearings often work well in non-ideal conditions, but sometimes minor problems cause bearings to fail quickly and mysteriously. For example, with a stationary (non-rotating) load, small vibrations can gradually press out the lubricant between the races and rollers or balls (false brinelling). Without lubricant the bearing fails, even though it is not rotating and thus is apparently not being used. For these sorts of reasons, much of bearing design is about failure analysis.

There are three usual limits to the lifetime or load capacity of a bearing: abrasion, fatigue and pressure-induced welding. Abrasion is when the surface is eroded by hard contaminants scraping at the bearing materials. Fatigue is when a material breaks after it is repeatedly loaded and released. Where the ball or roller touches the race there is always some deformation, and hence a risk of fatigue. Smaller balls or rollers deform more sharply, and so tend to fatigue faster. Pressure-induced welding is when two metal pieces are pressed together at very high pressure and they become one. Although balls, rollers and races may look smooth, they are microscopically rough. Thus, there are high-pressure spots which push away the bearing lubricant. Sometimes, the resulting metal-to-metal contact welds a microscopic part of the ball or roller to the race. As the bearing continues to rotate, the weld is then torn apart, but it may leave race welded to bearing or bearing welded to race.

Although there are many other apparent causes of bearing failure, most can be reduced to these three. For example, a bearing which is run dry of lubricant fails not because it is “without lubricant”, but because lack of lubrication leads to fatigue and welding, and the resulting wear debris can cause abrasion. Similar events occur in false brinelling damage. In high speed applications, the oil flow also reduces the bearing metal temperature by convection. The oil becomes the heat sink for the friction losses generated by the bearing.

April 1st, 2009 by admin

All parts of a bearing are subject to many design constraints. For example, the inner and outer races are often complex shapes, making them difficult to manufacture. Balls and rollers, though simpler in shape, are small; since they bend sharply where they run on the races, the bearings are prone to fatigue. The loads within a bearing assembly are also affected by the speed of operation: rolling-element bearings may spin over 100,000 rpm, and the principal load in such a bearing may be momentum rather than the applied load. Smaller rolling elements are lighter and thus have less momentum, but smaller elements also bend more sharply where they contact the race, causing them to fail more rapidly from fatigue.

There are also many material issues: a harder material may be more durable against abrasion but more likely to suffer fatigue fracture, so the material varies with the application, and while steel is most common for rolling-element bearings, plastics, glass, and ceramics are all in common use. A small defect (irregularity) in the material is often responsible for bearing failure; one of the biggest improvements in the life of common bearings during the second half of the 1900s was the use of more homogeneous materials, rather than better materials or lubricants (though both were also significant). Lubricant properties vary with temperature and load, so the best lubricant varies with application.

Although bearings tend to wear out with use, designers can make tradeoffs of bearing size and cost versus lifetime. A bearing can last indefinitely — longer than the rest of the machine — if it is kept cool, clean, lubricated, is run within the rated load, and if the bearing materials are sufficiently free of microscopic defects. Note that cooling, lubrication, and sealing are thus important parts of the bearing design.

The needed bearing lifetime also varies with the application. For example, Tedric A. Harris reports in his Rolling Bearing Analysis[2] on an oxygen pump bearing in the U.S. Space Shuttle which could not be adequately isolated from the liquid oxygen being pumped, but all lubricants reacted with the oxygen leading to fires and other failures. The solution was to lubricate the bearing with the oxygen. Although liquid oxygen is a poor lubricant, it was adequate, since the service life of the pump was just a few hours.

The operating environment and service needs are also important design considerations. Some bearing assemblies require routine addition of lubricants, while others are factory sealed, requiring no further maintenance for the life of the mechanical assembly. Although seals are appealing, they increase friction, and a permanently-sealed bearing may have the lubricant contaminated by hard particles, such as steel chips from the race or bearing, sand, or grit that got past the seal. Contamination in the lubricant is abrasive and greatly reduces the operating life of the bearing assembly. Another major cause of bearing failure is the presence of water in the lubrication oil. Online water in oil monitors have been introduced in recent years to monitor the effects of both particles and the presence of water in oil and their combined effect.

Deep Groove Ball Bearing
We supply high quality Slewing Ring Bearing, Tapered Roller Bearing, Spherical Plain Bearing, Needle Roller Bearing, Mounted Bearing Unit, Linear Motion Bearing, Automotive Bearing, Self-aligning Ball Bearing also customized bearing per drawing With many years’ experience we have cooperated with several factories and holding the concerned production company.

April 1st, 2009 by admin

Datang Huainan Tianjia An electric power plant maintenance company Xie Xiaoguang QC and his group of home-made electrical clearance measurement tools to measure the diameter of bearing 56 to 200 mm, clearance error of only 0.01 mm, with the traditional motor repair methods Used in pressure lead wire and plug-foot law, smaller and easier to use, high-precision measurements, a wide range to meet the basic measurement of a variety of bearing clearance.

In the coal-fired power plants, motor as a power source unit to ensure the normal operation of the main ancillary equipment. Through statistical analysis, Xie Xiaoguang QC and his team found that as a result of bearing damage caused by electrical fault achieve more than 60%.

How to bearing lower failure rate? Identification of bearing clearance is a key factor in whether or not qualified. Clearance is a ring bearing relative to the other mobile ring bearing the distance, clearance does not meet the technical standards will be affected in the rolling load between the rational distribution and reduce the spin bearings and precision of life.

Bearing clearance commonly used method of measuring test-foot plug lead wire and the pressure test, but both methods fail to pass bearing a lower detection rate and a longer time. Xie Xiaoguang QC and his group draw on collective wisdom and flexibility from a similar working principle of special tools, bearings mounting inner bearing inner ring will be measured fixed, measured the measured outer ring along the radial bearing the greatest amount of activity in order to detect Bearing Value gap. Meter from the base, bearing inner ring mounting (upper and lower), locking nut, Dial, magnetic seat table, table, and other aircraft components. Use will be measured on the bearing inner ring-bearing mounting, the screw tight locking nut, so that the measured bearing inner ring fixed, and then magnetic seat table, table frame Dial will be fixed base in the center of the measuring tool , So that the tip sheet and measured bearing outer ring and vertical surfaces, hand-pushed back and forth bearing outer ring, guide swings at this time Dial is the scope of the test bearing clearance value.

Deep Groove Ball Bearing
We supply high quality Slewing Ring Bearing, Tapered Roller Bearing, Spherical Plain Bearing, Needle Roller Bearing, Mounted Bearing Unit, Linear Motion Bearing, Automotive Bearing, Self-aligning Ball Bearing also customized bearing per drawing With many years’ experience we have cooperated with several factories and holding the concerned production company.

April 1st, 2009 by admin

Continuous casting steel bearings are bearing a. Often used in the application of iron and steel machinery, is a more common bearings. Japan imported brands bearing Seiko has developed a automatically aligning the import of tapered roller bearings. Mainly used in steel casting equipment-driven roller (Guide Roll). The finite element method for strength design, the use of continuous casting and completion of the development of the simulator. Durable life of ordinary auto-aligning tapered roller bearings imports (in the direction of the roll using a fixed-side), 3~4 times.

also can reduce maintenance costs, equipment, iron and steel casting difficult to form a film, a major negative, low-speed, high-temperature, high humidity, casting debris generated when the working environment is extremely bad. In this state, as can easily lead to significant negative orientation of serious roll bending deformation. In order to solve the problem, out of gear set up outside the ring as a sphere, Block-aligning device so that it is not easy curved. To this end SKF, TIMKEN, NSK, and other import brands are more appropriate to develop higher and more high-precision bearings.

Deep Groove Ball Bearing
We supply high quality Slewing Ring Bearing, Tapered Roller Bearing, Spherical Plain Bearing, Needle Roller Bearing, Mounted Bearing Unit, Linear Motion Bearing, Automotive Bearing, Self-aligning Ball Bearing also customized bearing per drawing With many years’ experience we have cooperated with several factories and holding the concerned production company.

March 25th, 2009 by admin

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.

Thrust bearing