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Nationskander Corporation - VXB Ball Bearings
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New product, 1/4" inch Miniature Pillow Block Mounted Bearings MUP4 
http://www.vxb.com/page/bearings/PROD/MUP4 
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http://www.vxb.com/ is a proud sponsor of a team in the First Robotics Competition.

The FIRST Robotics Competition is an international high school robotics competition organized by FIRST (For Inspiration and Recognition of Science and Technology). Each year, teams of high school students compete to build robots weighing up to 120 pounds (not including battery and bumpers) that can complete a game that changes yearly. While teams are given a standard set of parts, they are also allowed a budget and encouraged to buy or make specialized parts as long as they conform to FIRST safety rules. Game details are given at the beginning of January and the teams are allowed six weeks to construct a competitive robot, that can operate autonomously as well as when guided by wireless controls, to accomplish the game's tasks.
          Every year, a different game is played. However, many of the game rules have not changed. Teams are randomly assigned in groups of 3 people, which are paired into qualification matches, where they earn 'qualifying points', the calculation of which changes each year. The game changes every year, but for the most part, they involve some autonomous (computer controlled) robot operation for 10–15 seconds at the beginning of a match, followed by a much longer period (usually 2 minutes) of remote control. The FIRST Robotics Competition involves teams of mentors (corporate employees, teachers, or college students) and high school students who collaborate to design and build the robot. The game is designed by FIRST and changes from year to year. This game is announced at a nationally simulcast kickoff event in January. VXB.com is a proud sponsor of a team in the First Robotics Competition. We encourage the participants as they may be responsible for some significant technological advances in years to come.
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Bearings, Heat and Clearance 

Ball and Roller bearings unmounted have internal clearance. This clearance is an actual air gap. http://www.vxb.com/SRCH.html?Store_Code=bearings&Search=full+complement  As bearings are mounted and pressed onto shafts some of the air gap is removed. As bearings operate the shaft is normally hotter than the housing causing a thermal unbalance which results in more clearance removal.

There are 3 key points to consider when purchasing a bearing: 

1. Clearance of the bearing- When heat is involved, the tolerance of the bearing will determine the amount of space the bearing has to expand. You will typically find bearings with C0 clearance. The next larger clearance is a C3, C4, and then C5. Each clearance allows a certain amount of space between the ball bearing and outer race. 

2. The material of the bearing: Under too much heat, chrome steel and stainless steel will rust. This limits the amount of heat the metal can take. Your standard chrome steel can handle up to 250ºF. If a bearing exceeds the heat temperature rating, it will fail. Stainless steel can handle more heat. The metal in high temperature bearings is heat treated to be able to withstand higher temperatures. 

3. Cage: You will notice that all of the high temperature bearings have no cage (full compliment). This is due to the fact that the bearings expand under heat. If a bearing is encased in a cage, once heated, the bearing will break the cage causing the bearing to fail. 
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Rusting and corrosion is oxidation of the steel. by www.vxb.com This can cause pits on the surface of the rings and rolling elements causing the bearing to cease. What causes corrosion? Well, there are a few causes of corrosion: Ingress of water, condensation of moisture in the air, poor packaging/storage conditions, and handling the bearing with bare hands. To prevent rusting one must ensure proper storage and proper sealing mechanism. These measures will prevent corrosion during long periods of mom-operation. 
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Walking the dog? Around the world? Well none of these fun tricks would be possible without the help of this little Yo-Yo bearing. http://www.vxb.com/page/bearings/PROD/Kit1069 This particular bearing has ceramic balls which minimizes friction, making them perfect for the speed we often aim for in a yo-yo. Some of the yo-yo models it fits are Tamiya, Kyosho, Duncan, ProYo, Freehand, Turbo Bees, Cold Fusion. The dimensions are 5mm x 10mm x 4mm. The inner and outer races are made of chrome steel for durability. MR105ZZ Yo-Yo 5x10 bearings
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Not 1, but 2 rows please. Double row angular contact ball bearings are used for radial loads, http://www.vxb.com/page/bearings/PROD/Kit8356 and can also carry thrust in either direction. Their radial load- carrying capacity is not double the corresponding single row bearing, but is 1.55 times the single row bearing for a 20º contact angle and 1.47 times for a 30º contact angle. The featured bearing measures 35mm x 72mm x 27mm and is made of chrome steel. We offer a large selection of sizes in angular contact bearings. 5207ZZ Double Row Angular Contact bearing.
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GE90ES-2RS Spherical Bushing Plain Bearing 90x130x60 Plain Bearings http://www.vxb.com/page/bearings/PROD/Kit7880
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Linear Shaft vs. Axle by http://www.vxb.com 

What is the difference between a linear motion shaft and a pin shaft? The answer is: The Tolerance. 

A linear motion rail is designed to have linear bearings move across the shaft. These rails are usually designed with a tolerance of -15 to -20 microns; enough undersized to accommodate the tolerance of the bearing and allowing it to glide smoothly up and down the shaft. Examples of these shafts are 3D printer machines, manufacturing plant machines, molding machines, etc. 

        A pin/axle shaft has a tolerance of +10 to +20 microns. A bearing would need to get press fit onto this shaft to fit snug. You can find these sorts of shafts/pins in pretty much most common applications such as roller skates, skateboards, ceiling fans, fans, etc. 

Shaft is desired to transfer the motion (rotary), from one 
 member to another, where as the axle is used to support the 
 bearing in rotary motion.  For example, if you were to use a linear shaft as an axle, you would find that the bearing would fit loosely around the shaft. The bearing therefore it would be unstable and may cause problems in the application. On the other hand, if an axle shaft were to be used as a linear shaft, you will find that the linear bearings would not glide up and down. The bearings would get stuck. We often get calls from customers with this problem. It is important to distinguish what type of shaft you need according to your application. For any questions, call us, we are happy to help. 
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The Different Types of Needle Roller Bearings http://www.vxb.com/page/bearings/CTGY/NEEDEL_ROLLER

Machined type: The machined type of needle roller bearing can carry the most weight out of the 3 types. This bearing is manufactured from a Machined Type Needle Roller Bearings are bearings with a low sectional height and large load ratings. The outer ring has high rigidity and can easily be used even for light alloy housings. These bearings are available in metric series and inch series, both of which have the caged type and the full complement type. It is possible to select a suitable bearing for use under various conditions such as heavy loads and high-speed or low-speed rotations. In addition, there are bearings with and without an inner ring. As the type without inner ring uses a shaft as the raceway surface, a compact design is possible

Drawn type: Drawn cup roller clutches are designed to transmit torque between the shaft and housing in one direction and allow free overrun in the opposite direction. These designs utilize the same small radial section as drawn cup needle roller bearings. The units are compact, lightweight and operate directly on a hardened shaft. These bearings are manufactured from pressed steel molds.  Proper mounting is easily accomplished with a simple press fit in the housing. Clutches and clutch and bearing assemblies are offered both in inch and metric nominal series. The Metric sizes for these bearings start with “HK” and the inch series starts with “SC” on our website. 

Cage roller: The caged roller bearings are great for low profile designs in applications. This design is basic and takes up less space than a machined roller bearing. Needle roller and cage assemblies are ready-to-mount, self-contained bearing components. They are an excellent choice for applications that require a very rigid bearing arrangement as well as a high load carrying capacity. If the shaft and housing bore can serve as raceways, needle roller and cage assemblies require minimal radial space. The part number for this bearing starts with a K on our website.
http://www.vxb.com/page/bearings/CTGY/NEEDEL_ROLLER

Machined type: The machined type of needle roller bearing can carry the most weight out of the 3 types. This bearing is manufactured from a 
Machined Type Needle Roller Bearings are bearings with a low sectional height and large load ratings. The outer ring has high rigidity and can easily be used even for light alloy housings. These bearings are available in metric series and inch series, both of which have the caged type and the full complement type. It is possible to select a suitable bearing for use under various conditions such as heavy loads and high-speed or low-speed rotations. In addition, there are bearings with and without an inner ring. As the type without inner ring uses a shaft as the raceway surface, a compact design is possible


Drawn type: Drawn cup roller clutches are designed to transmit torque between the shaft and housing in one direction and allow free overrun in the opposite direction. These designs utilize the same small radial section as drawn cup needle roller bearings. The units are compact, lightweight and operate directly on a hardened shaft. These bearings are manufactured from pressed steel molds.  Proper mounting is easily accomplished with a simple press fit in the housing. Clutches and clutch and bearing assemblies are offered both in inch and metric nominal series. The Metric sizes for these bearings start with “HK” and the inch series starts with “SC” on our website. 


Cage roller: The caged roller bearings are great for low profile designs in applications. This design is basic and takes up less space than a machined roller bearing. Needle roller and cage assemblies are ready-to-mount, self-contained bearing components. They are an excellent choice for applications that require a very rigid bearing arrangement as well as a high load carrying capacity. If the shaft and housing bore can serve as raceways, needle roller and cage assemblies require minimal radial space. The part number for this bearing starts with a K on our website.
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Would you like a cone or cup? This bearing comes with both! This single-row tapered roller bearings has the capacity to carry radial and axial load in one direction simultaneously (cone + cup). http://www.vxb.com/page/bearings/PROD/Kit7101 The sliding motion between the inner ring and flange and the roller end is the primary heat generation source. They have optimized the design of this critical area to reduce heat build up. The featured bearing measures 95mm x 170mm x 34.5mm and is made of chrome steel. 
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Living in the hot life! 1,000ºF is what this little bearing handle. That is pretty hot if you ask me. http://www.vxb.com/page/bearings/PROD/HighTemperatureBearings/Kit18121 This bearing is made of Silicon Nitride races and ball bearings. Ceramic is non magnetic, non conductive, and produces the least amount of friction. You will notice, this bearing has no cage and that allows for the ball bearings to expand in the heat. The bearing needs to be used in an application with no vibration, light load on the bearing, and no heavy impact as the bearing is brittle. The featured bearing measures 8mm x 22mm x 7mm, 608 Full Compliment Ceramic High Temperature Bearing.
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No washer needed here…when using a bearing with cage and roller assembly, http://www.vxb.com/page/bearings/PROD/Kit8683 a separate raceway washer is not needed if the gear side is used as a raceway. AXK3047 Thrust Needle Bearing saves space and allows the bearing to be even more compact. If the bearing is placed in a housing, that will not allow the gear side to be used as a raceway, using an integrated bearing facilitates handling and mounting. Thrust bearings are often used in automobile drive trains, compressors, hydraulic pumps, machine tools, and industrial machinery. 
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Contact Information
Map of the business location
2165 S Dupont Dr Anaheim, CA 92806
2165 S Dupont DrUSCAAnaheim92806
(714) 442-2740vxb.com
Bearing Supplier, WholesalerToday 8:00 am – 4:30 pm
Monday 8:00 am – 4:30 pmTuesday 8:00 am – 4:30 pmWednesday 8:00 am – 4:30 pmThursday 8:00 am – 4:30 pmFriday 8:00 am – 4:30 pmSaturday ClosedSunday Closed
With an efficient business operation and more than a million bearings in our warehouse, NationSkander California Corporation has served the industry by supplying all kinds of Ball Bearings. Ball Bearing businesses have been our family tradition since 1958. We import, export, wholesale and distribute bearings under our VXB brand name. We are pleased to have our online store up and running 24/7. And now we are official distributors of three top quality Japanese manufactures: Nachi, NB, and FYH.
Just browse, add to cart, and check out. It’s that easy. If you have any questions please call toll free number: (800) 928-4430. 
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