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As important machinery parts, ceramic bearings have unmatched superior performances. Over the past decades, they have been increasingly widely used in many different industries such as aerospace, marine, nuclear industry, petroleum, chemical industry, textile industry, metallurgy, electric power, food, motorcycles, subway, and high-speed machine tools and so on. Their particular function is gradually recognized by people.

With the progress of the processing technology, costs of ceramic bearings have been declined. As in the past, they can only be used in some high-precision and advanced range of application areas. But now, they are gradually extended to various industries. Market prices of products are also gradually close to the practical situations. They are more acceptable to the users.

In recent years, research and development on ceramic bearings has yielded fruitful results and achieved substantive progress. They have been applied in machine tools, chemical industries, aerospace and many other fields. Obviously, they play a rather important part in the industries.

When compared to the steel bearings, these bearings have many specific advantages. Firstly, they have higher rotating speed and acceleration capacity. They can be operated under the conditions whose DN are more than 3 million. Meanwhile, they can reduce the possibility of slipping, wear and heating. Secondly, they have long service life and resistance to wear.

The fatigue life of full ceramic bearings is expected 10-50 times longer than steel bearings. Even the hybrid ceramic bearings have life span which is 3-5 times longer than the steel bearings. Thirdly, they require less lubrication. Because the coefficient of friction of ceramic materials is low, even the lubricant oil becomes thin; its lubricating ability is still as good as traditional lubricants on steel bearings. Fourthly, they are more corrosion-resistant.

Ceramic materials are inert materials and it is more resistant to corrosion and abrasion. Fifthly, they have high rigidity. Due to the high elastic modulus of the ceramic materials, the rigidity of bearings is 15-20% than the ordinary steel bearings. Sixthly, they can work under high temperature. Seventhly, their torque is low. According to the structure of ceramic bearings, their torque decreases by about 1 / 3. Eighthly, they are not magnetic and not conductive. They can avoid the damage of the magnetism and the electricity.

According to the above, we can safely draw the conclusion that ceramic bearings are increasingly important in our industries. With the development of the research and a large number of manufacturing technology breakthroughs, the application of ceramic bearings under the condition of high speed, high temperature will have very good prospects.

SeekPart is the global B2B platform in the industry of mechanical parts. SeekPart aggregates the trade leads in this area, and our ultimate target is to benefit the buyers and sellers of mechanical parts by utilizing these leads through our online tools.

For more information, please click hybrid ceramic bearing

Singer Curvy 8770 Sewing Machine Review

The stylish design of the Singer Curvy 8770 sewing machine isn't the only plus for this machine. The incredible volume of decorative stitches and functionality offer an attractive set of options for beginners and experienced seamstresses alike.

If you already sew a great deal and are looking for a replacement sewing machine or just getting started but know that you want a machine that will carry you through multiple types of sewing, it's worth taking a look at this one. It will handle garment construction, craft sewing, quilting, light embroidery and free-motion embroidery

Singer Curvy 8770 Stitch Patterns
A set of 225 built-in stitches are divided into two categories. The first set is comprised of 55 utility stitches that cover straight, zigzag, stretch stitches, and overcasting and 10 1-step buttonhole styles. The second set is made up of 20 decorative and satin stitches, 28 mirror stitch patterns, and 112 letters, characters and numbers in a box-style font.

Stitch width is adjustable to 7mm and stitch length is adjustable to 4mm. Width and length options are stitch-dependent, meaning that not all stitches can be adjusted up to 7mm and 4mm. A very clear outline of the minimum and maximum settings available for each stitch is presented in the instruction guide that comes with the sewing machine.

The Zigzag stitch tapers to the center no matter when you end your run of stitches so that you always have a nice, clean finish.

Singer Curvy 8770 Presser Feet
There are a total of five, snap-on presser feet included with this sewing machine: General Purpose, Zipper foot, Satin Stitch foot, Blind Stitch, and the Buttonhole foot. Presser feet are low-shank design and the machine can accommodate a number of other presser feet that you can purchase separately.

The presser foot lever has three height settings: down, up and extra-high up so you can slip thicker projects and fabrics under the presser foot.

Singer Curvy 8770 Features
Everything you'd want in a sewing machine to make set up as quick and simple as possible has been included: automatic needle threader, SwiftSmart threading system, top drop-in bobbin with jam proof design, and an automatic bobbin winder.

Routine sewing machine tasks have been automated with push button controls like the six buttons that access the most utility stitches, automatic stitch tie off, reverse button, programmable needle up/down control, and an electronic twin needle control button.

Several technology improvements also offer effortless fabric and stitch control such as the use of a horizontal thread delivery system, optimum power control that reallocates power to the needle arm when working through a thick seam, and a direct drive system which provides more direct power to the needle arm. The Singer exclusive Buttonhole Underplate applies additional pressure to layers of fabrics for even, consistent buttonholes.

More advanced sewers will appreciate the available 13 needle positions, adjustable top thread tension controls, and the drop feed dog lever.

Both free-arm sewing and twin needle sewing are possible on the Curvy 8770. The bobbin cover is see-through so you know when you're running out of thread. There is a built-in carry handle at the top of the machine, 3 built in LED work lights, and a built-in manual thread cutter. The instruction guide is incredibly thorough.

Singer Curvy 8770 Accessories
Included sewing accessories can be stored inside the extension arm cubby and the sewing machine comes with a dust cover as well as extra needles, extra bobbins, an auxiliary spool pin, felt discs, spool caps and a combination buttonhole opener and seam ripper.

The Singer Curvy 8770 sewing machine operates quietly and efficiently. The six point feed dog system uses the box rotation method for reliable fabric control. The control panel, although computerized, is extremely user friendly and very easy to learn.

About the Author

See how the Singer Curvy 8770 stacks up to other sewing machines in its price range through this link: Singer Curvy 8770. You can compare sewing machines, learn how to find the best deal, and get in depth feature and product information here: http://www.sewing-machines-for-beginners.com/.

Good - or not-so-good - vibrations
Next to a hard-riding hull, excessive noise and vibration are among the worst powerboat problems. Other than fans of go-fast speedsters, most skippers I know don't think more engine noise is good, and no one likes a boat that rattles and vibrates.

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This entry was posted on Thursday, December 13th, 2007 at 6:37 am and is filed under Screwdrivers And Pliers. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.