ball bearing units | ball bearings | products | nsk global
The NSK bearing unit is a combination of a radial ball bearing, seal, and a housing of high-grade cast iron or pressed steel, which comes in various shapes. The outer surface of the bearing and the internal surface of the housing are spherical, so that the unit is self-aligning. The inside construction of the ball bearing for the unit is such that steel balls and retainers of the same type as in series 62 and 63 of the deep groove ball bearing are used. A duplex seal consisting of a combination of an oil-proof synthetic rubber seal and a slinger is provided on both sides.
These bearing housings have oval flanges which can be easily installed onto a machine with two bolts.
This type of bearing unit is suitable where mounting space is limited or where it is necessary to minimize the distance between shafts. The distance between bolt holes of an oval flange type is generally equal to the distance between bolt holes diagonal position of square flange type.
how ball bearing is made - manufacture, making, used, parts, dimensions, industry, machine
Ever since man began to need to move things, he has used round rollers to
make the job easier. Probably the first rollers were sticks or logs, which
were a big improvement over dragging things across the ground, but still
pretty hard work. Egyptians used logs to roll their huge blocks of stone
for the pyramids. Eventually, someone came up with the idea of securing
the roller to whatever was being moved, and built the first
"vehicle" with "wheels." However, these still
had bearings made from materials rubbing on each other instead of rolling
on each other. It wasn't until the late eighteenth century that the
basic design for bearings was developed. In 1794, Welsh ironmaster Philip
Vaughan patented a design for ball bearings to support the axle of a
carriage. Development continued in the nineteenth and early twentieth
centuries, spurred by the advancement of the bicycle and the
There are thousands of sizes, shapes, and kinds of rolling bearings; ball
bearings, roller bearings, needle bearings, and tapered roller bearings
are the major kinds. Sizes run from small enough to run miniature motors
to huge bearings used to support rotating parts in hydroelectric power
plants; these large bearings can be ten feet (3.04 meters) in diameter and
require a crane to install. The most common sizes can easily be held in
one hand and are used in things like electric motors.
This article will describe only ball bearings. In these bearings, the
rolling part is a ball, which rolls between inner and outer rings called
races. The balls are held by a cage, which keeps them evenly spaced around
the races. In addition to these parts, there are a lot of optional parts
for special bearings, like seals to keep oil or grease in and dirt out, or
screws to hold a bearing in place. We won't worry here about these
Almost all parts of all ball bearings are made of steel. Since the bearing
has to stand up to a lot of stress, it needs to be made of very strong
steel. The standard industry classification for the steel in these
bearings is 52100, which means that it has one percent chromium and one
percent carbon (called alloys when added to the basic steel). This steel
can be made very hard and tough by heat treating. Where rusting might be a
problem, bearings are made from 440C
Bearing making is a very precise business. Tests are run on samples of the
steel coming to the factory to make sure that it has the
right amounts of the alloy metals in it. Hardness and toughness tests are
also done at several stages of the heat treating process. There are also
many inspections along the way to make sure that sizes and shapes are
correct. The surface of the balls and where they roll on the races must be
exceptionally smooth. The balls can't be out of round more than 25
millionths of an inch, even for an inexpensive bearing. High-speed or
precision bearings are allowed only five-millionths of an inch.
Ball bearings will be used for many years to come, because they are very
simple and have become very inexpensive to manufacture. Some companies
experimented with making balls in space on the space shuttle. In space,
molten blobs of steel can be spit out into the air, and the zero gravity
lets them float in the air. The blobs automatically make perfect spheres
while they cool and harden. However, space travel is still expensive, so a
lot of polishing can be done on the ground for the cost of one
Other kinds of bearings are on the horizon, though. Bearings where the two
objects never touch each other at all are efficient to run but difficult
to make. One kind uses magnets that push away from each other and can be
used to hold things apart. This is how the "mag-lev" (for
magnetic levitation) trains are built. Another kind forces air into a
space between two close-fitting surfaces, making them float apart from
each other on a cushion of compressed air. However, both of these bearings
are much more expensive to build and operate than the humble, trusted ball
ball bearings : ntn snr, high speed ball bearings
NTN SNR EUROPE designs, develops, manufactures and markets various ranges of bearings, rollers, linear guides, CV joints, coders, vehicle spare parts, maintenance products... and offers related services. We support the major players on a global scale and also provide distribution and aftermarket services.
Prioritise performance and choose from among a range of more than 10,000 active part numbers. Ranging from bore diameters of 1.5mm to 1,320mm, the range of NTN-SNR ball-bearings is one of the broadest and most comprehensive on the market.
The Topline range offers solutions that are available from stock and ready for use under demanding speed and temperature conditions (-60C to +350C), for applications such as in the iron and steel industry, for processing wood, for electric motors, packaging machines, ski lifts, etc.
Megaohm technologyis a high-performance ceramic coating ensuring electrical insulation with breakdown voltages of up to 3000V. It is available in the 6200 & 6300 series, and is particularly used in electric motors. Guaranteed interchangeability.
An alternative to classic lubrication, solid lubricationeliminates failures due to lack of lubrication, prevents leakage of grease, and optimises energy consumption while being environmentally friendly.
Identified by the prefixes TAB and TMB, their lifetime is extended thanks to suitable materials and heat treatments. In addition to their extended useful life, they also meet the growing need for weight reduction in applications (downsizing).
ball bearings | titanium screws & bolts | flexible copper wire
Our World Champion Ceramic Nitride Pro SeriesRC ball bearingsand Ceramic differential balls are the fastest, lightest, smoothest and hardest balls in the industry. For over two decades, we've celebrated being one of the most respected names in RC racing history.
Since 1989, ACER Racing has pioneered technologies that allow remote controlled models to race faster, and race longer. Our legendary Ceramic Nitride pro-series silicon nitride differential balls and ceramic RC ball bearings stunned the RC racing scene with pure ceramicsilicon nitride bearings(not ceramic coated steel balls) achieving a 79% weight savings and even greater durability, hardness and smoothness than Tungsten Carbide balls.
We instantly became known as "the hardest balls in the industry." Since then our quality and performance have made ACER Racing silicon nitride bearings standard equipment in RC cars of numerous national and international champions. We have received praise nationally and internationally from the top hobby magazines, as well as the greatest compliment of them all: news of you, our loyal customers' achievements on the track. Track tested and race proven, all ACER Racing products are engineered to allow you to race faster, longer, race after winning race.
Try our Associated ball bearings, Vaterra ball bearings,Corally ball bearings,GS Racing ball bearings,HPI ball bearings,Hot Bodies ball bearings,Jammin ball bearings, Kyosho ball bearings,Losi ball bearings, Mugen ball bearings,OFNA,Schumacher, Serpent, Tamiya ball bearings, Traxxas ball bearings,Trinity,XRay, andYokomo RC bearings.
Try our other race-certified RC products such as Anderson Powerpole connectors, silicone super flexible silver plated RC wire, super smooth O rings, and now our ceramic skate bearings which are the fastest ceramic skateboard bearings at any price.
Without smoother, consistent, and reliable RC parts, it's hard to compete with the pros on the track. RC ball bearings differ greatly in life span and quality, and in a sport when every little advantage determines who ends up in the winner's circle, you cannot afford to compromise even an ounce of performance. RC ball bearings are paramount in controlling the speed, smoothness, and durability of your RC racer. A qualityball bearingmaximizes your tire rotation and thus increases your maximum speed. By virtually eliminating any friction in the tire rotation, a high quality ball bearing helps glide the car along, like it's moving on ice.
This is a complete 20 piece Titanium Lug Bolt Set for the Porsche 911 1999-2020 model years. Manufactured from aerospace grade 6AL4V Titanium, these titanium lug bolts will not corrode or rust and offer a significant weight savings on your Porsche while giving a very sporty and aggressive look. Rolled threads for superior fatigue resistance. Available in natural 6AL4V Titanium color. 19mm hex head, M14x1.5x29 (shaft length is 29mm which is the standard shaft length if not using spacers). Note: these are for original Porsche wheels with no spacers. If you are using aftermarket wheels or spacers please contact us for proper fitment.
ball & roller bearings | custom ball bearing parts
When it comes to your product or design, we understand that it is vitally important to have the right bearing supply partner that recognizes you unique needs and is willing to help find, supply and quickly deliver the right bearing for your application.
Ritbearing is a responsive bearing supplier with a deep manufacturer base providing the best service, competitive pricing, and quality products. We bring our entire network of quality manufacturers to match your design and product needs while still being cost competitive compared to the major bearing manufacturers.
Even the top manufacturers subsidize their bearing production, which means they are limited on the solutions they can provide to you. We won't force you to select from an out-of-the-box bearing model. Ritbearing has the flexibility to serve your small or niche application with exactly the bearing solution you need.
Ritbearing offers custom engineered bearing solutions with shorter lead times and smaller minimum order quantities. We can also accommodate custom bearing designs which require special greases, coatings and more.
Almost everything that moves needs a bearing, but the right bearing can be the difference between simply operational and outstanding for your project. We continually add new focus markets and constantly work closely with our bearing manufacturer partners to develop new information and research to expand our available product solutions.
alpine bearing | ball bearings supplier | same-day shipping
Alpine Bearing supplies and distributes high quality ball bearings produced by the industrys leading manufacturers. Whether its one piece or one thousand, from pairs to quad sets, we have what you are looking for. With over 600,000 parts in stock and the ability to purchase and ship internationally, if we dont have it, we will find it. Browse our collection of ball bearings.
A sheep You may look at a sheep and wonder what is has to do with CNC (computer numerical control) machining. The truth is, we might not have seen the creation and expansion of manufacturing and computing as it is now if not for fleece and a few creative thinkers in the 18th century. The 
ball bearings supplier - ball bearings - bearings direct
Bearings Direct is a ball bearings supplier with over twenty years of experience in the industry. Ball bearings consist of a series of round balls in a casing, within an inner and outer ring capable of supporting both radial and axial (thrust) loads. Ball bearings come in both single and double row configurations, in both metric and inch sizes, and can be found in a large range of applications from door hinges to roller skates. For more information, browse our inventory of ball bearings below!
Miniature Ball Bearings are small bearings with bore sizes between 1 and 10 mm or up to half an inch. Bearings Direct offers a number of miniature ball bearings in both metric and inch sizes that meet ABEC7 precision class.
Deep Groove Ball Bearings are incredibly versatile and the most widely used. Due to their low friction, they are capable of high rotational speeds, supporting both radial and axial loads. Bearings Direct offers both inmetric andinch sizes , also we stock stainless steel made materialsmetric andinch sizes
Double Row Ball Bearingsare similar to both precision angular contact and super precision ball bearings in that they can accommodate a combined radial and axial loads. These bearings have two rows of balls inside making them capable of much higher loads. Bearings Direct supplies double row ball bearings that are open and with shielded or sealed closures.
Self-Aligning Ball Bearingsare double-row ball bearings that can adapt to both static and dynamic angular misalignment. These bearings are particularly appropriate when shaft and housing alignment is a challenge.
Bearings Direct offers a large selection of ball bearings available for purchase online. You can view our inventory below or using the links on the left-hand side. To request more information, contact us today.
Bearings Direct supplies mini metric ball bearings in bore sizes from 1mm to 10mm. We also offer metric miniature ball bearings with a flanged outer ring, combined with ceramic, stainless steel, or plastic materials. These bearings are up to ABEC7 precision class.
Inch miniature ball bearings are available in bore sizes from 1/8 to 1/2 inch. These miniature ball bearings have a flanged outer ring and can be combined with ceramic, stainless steel, or plastic materials. Our inch size miniature ball bearings range from ABEC0 up to ABEC7 precision class.
Bearings Direct supplies metric bearings & ball bearings. These metric bearings are radial, single-row bearings in chrome steel, stainless steel, and more. We also supply super precision ball bearings in metric sizes. See our inventory below!
Our inventory of deep groove & super precision radial ball bearings consists of super precision ABEC7/p4 bearings with a phenolic retainer. These bearings are perfect for high-speed and precision applications.
Bearings Direct supplies imperial inch & inch size single row radial ball bearings. These bearings come in chrome and stainless steel, open-shielded-sealed closures, and more configurations. View our inventory below!
Our inventory of bearings includes inch stainless radial ball bearings & inch size single row ball bearings. These are sealed, shielded, and pre-lubricated with grease. They are made with AISI-440C stainless steel to improve corrosion resistance.
Bearings Direct supplies a range of Automotive AC ball bearings and Air Conditioner bearings. These bearings are suitable for the high-speed applications Automotive A/C compressors require. They are typically double-row ball bearings, rubber sealed on both sides, and pre-lubricated with high-speed grease.
Bearings Direct supplies a variety of precision angular contact ball bearings & angular contact ball bearings. We offer three different series, 7000, 7200, and 7300. View our subcategory pages for more information!
Bearings Direct's supply of self aligning ball bearings includes self-aligning double row ball bearings. These range from light to medium duty. Our light duty bearings are offered with or without seals.
Thrust ball bearings are comprised of ball rolling elements. Their appearance sets them apart from the other types of bearings since the outer race and inner race, called shaft and housing washers, are layered with the cage in between. This assembly makes them look like three stacked washers. Thrust ball bearings can sustain loads at high speeds and their use are ideal for axial loads only.
Our inventory of thrust ball bearings includes single row thrust ball bearings and vary in sizes. We offer both miniature three-piece and regular three-piece thrust ball bearings. Many of our Miniature Thrust Ball Bearings contain washers with or without a groove and are made of chrome steel and brass cages. Regular Thrust Ball Bearings are made of chrome steel. Take a look at our selection and order today!
Our inventory of mast guide ball bearings and mast guide bearings includes various bores and thicknesses. These bearings may come sealed on both sides and pre-lubricated with grease. View our inventory below to explore all options. All sizes are based on Bore (ID) x Outside (OD) x Thickness (W) Dimensions.
ball bearings - grainger industrial supply
Ball bearings, or deep-groove bearings, extend the working life of equipment by enabling wheels, pulleys, and other rotating parts to reduce friction and move smoothly. Ball bearings have a series of round balls encased in a housing and support high axial or low-to-moderate radial loads. Axial (thrust) bearings support loads parallel to the axis, such as those exerted by a table supporting a weight. Radial bearings support loads where the force of the load is perpendicular to the shaft, such as those exerted by a rotating wheel. Angular (linear) bearings have two rows of balls set at an angle to one another for use with radial and axial loads. Ball screw support bearings are high-precision angular bearings used to support high loads and restrict axial movement for precise positioning for machining and other ball screw applications. Agricultural disc bearings are used in high-impact industrial applications where the bearing is exposed to high levels of dirt or other contaminants.