Standard bearing sizes
Standard bearing sizes can vary depending on the type of bearing and the industry standards followed by manufacturers. However, there are some common standard sizes that are widely used across different types of bearings. Here are some examples:
1. Thrust Bearings:
– Thrust ball bearings often follow standard sizes like 51100, 51205, 51310, etc., where the numbers indicate bore diameter in millimeters.
– Thrust roller bearings may have standard sizes such as 81102, 81208, 89315, etc., which also represent bore diameter dimensions.
2. Ball Bearings:
– The most common ball bearing sizes are typically designated by a four-digit number, such as 6204 or 6305. These numbers usually represent the bore diameter in millimeters (e.g., 6204 has a bore diameter of 20 mm).
– Other standard sizes include 6000, 6200, 6300 series bearings with bore diameters ranging from 10 mm to 50 mm.
3. Pillow Block Bearings:
– Pillow block bearings often adhere to standard sizes such as UCP205, UCF208, UCFL212, etc., where the designation includes the bearing type and size.
4. Roller Bearings:
– Cylindrical Roller Bearings: These bearings often have standard sizes such as N202, NUP2205, NU308, etc., where the numbers denote different dimensions and configurations.
– Tapered Roller Bearings: Common sizes include 30206, 30310, 32215, etc., with numbers representing the bearing’s bore diameter and width.
– Spherical Roller Bearings: These bearings come in standard sizes such as 22210, 22320, 23130, etc., where the numbers typically denote the bearing’s bore diameter in millimeters.
5. Flanged Bearings:
– Flanged bearings often follow standard sizes such as F688, MF126, F604, etc., where the designation includes the bearing type and size, along with the flange dimensions.
6. Needle Roller Bearings:
– Needle roller bearings come in various standard sizes denoted by alphanumeric codes such as NA4908, NKI25/20, RNA6904, etc. These codes typically indicate the bearing’s series, bore diameter, and other dimensions.
7. Angular Contact Ball Bearings:
– Angular contact ball bearings may have standard sizes like 7205, 7308, 7012, etc., where the numbers represent the bearing’s bore diameter in millimeters.
8. Deep Groove Ball Bearings:
– Deep groove ball bearings typically come in standard sizes like 6001, 6202, 6303, etc., where the numbers represent the bore diameter in millimeters.
These standard bearing sizes are widely used in various industries such as automotive, aerospace, machinery, and more. They provide compatibility and interchangeability, making it easier for engineers, maintenance professionals, and manufacturers to select and replace bearings as needed.
It’s important to note that while standard sizes are prevalent, there are also non-standard or custom sizes available to meet specific application requirements. Manufacturers often offer a wide range of options to accommodate diverse needs in terms of load capacity, speed, operating conditions, and environmental factors.
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