-
-
Product name: 638RS Bearing 8*28*9 mm ABEC-1 Grade 638-2RS Miniature 638 RS Ball Bearings
-
-
Price: ASK
-
-
Post date: 2020-09-03
-
-
Stock Quantity: 1000
-
Quantity:
What is a Ball Bearing
The Function of Ball Bearings
From small and large motors to car axles to electric fans and hard disc drives (HDDs), ball bearings are used in a wide array of machines for rotary motion. Ball bearings support rotary parts and reduce friction to facilitate the smooth operation of machines.
Ball Bearing Components
Ball bearings are comprised of four major parts: a large ring (outer ring), a small ring (inner ring), balls between the rings (steel balls), and a cage to prevent the balls from hitting each other. The modern structure dates back to around 1500, when Leonardo da Vinci invented ball bearings to reduce friction against the axles of horsedrawn carts. For more than 500 years, the ball bearing has been defined by this simple structure.
Miniature Ball Bearings are a type of rolling-element bearing that uses balls to maintainthe 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. Radial Ball bearings can support moderate radial loads and moderate axial loads (parallel to the shaft). They can operate at high speeds . Ball bearings with shields or seals for protection can be lubricated to last for the operating life. Sometimes ball bearings are also called "deep groove ball bearings."
TECHNICAL SPECS
Item: 638RS Ball Bearing
Type: Deep Groove Ball Bearing
Material: 52100 Chrome Steel
Closures: 2 Sealed
Grade: ABEC-1
Size: 8mm x 28mm x 9mm
Inner Diameter: 8mm
Outer Diameter: 28mm
Width: 9mm
Dynamic load rating Cr: 4,160 N
Static load rating Cor: 1,780 N
Chamfer: 0.3 mm
Bearing BVT Vibration Detection
The BVT bearing Vibration (speed) measuring instrument is a special instrument for measuring the vibration speed of ball bearings, which consists of a speed sensor, a driver, a sensor position adjustment device, a pneumatic loader and a measuring amplifier.
Bearing Hardness Testing
Bearing hardness is a key parameter affecting the dynamic performance of precision shaft system, which reflects the ability of bearing to withstand deformation of shaft system under different environment and load state.
Bearing Clearance Detection
The radial/axial clearance of rolling bearings is one of the important quality indexes of bearings, which has certain influence on bearing vibration, life and host precision, and is directly related to the installation and use of users.
