Introduces a miniature bearing concrete parameter table and rust

Introduces a miniature bearing concrete parameter table and corrosion causes the micro and small bearings is composed of outer ring, inner ring, rolling, rolling retainer, seal ( Dust cover) And spring coil of machining parts. Less than 30 mm outside diameter is called the micro and small ball bearing, is to ensure that the shaft of the rotating equipment with high precision requirements stable operation of the bearing parts and assembly in precision parts. Miniature bearing refers to metric series, outside diameter is less than 9 mm; Inch series, outer diameter less than 9. All kinds of bearing 525 mm! Main material is carbon steel, bearing steel, stainless steel, plastic, ceramic, etc. , including minimum inner diameter can be 0. 6 mm, average diameter of 1 mm more according to the size of miniature bearing can be divided into: ( 1) Miniature bearing - - - - Nominal diameter size range of 26 mm below the bearing; ( 2) Small bearings - - - - Size range for 28 - nominal diameter 55 mm bearing; ( 3) Small and medium-sized bearings - - - - Size range for 60 - nominal diameter 115 mm bearing; ( 4) Large bearing - - - - Nominal diameter size range is 120 - The 190 mm bearing ( 5) Large bearing - - - - Nominal diameter size range is 200 - 430 mm bearing; ( 6) Oversize bearings - - - - Size range for the 440 mm above the nominal diameter of the bearing. Causes of corrosion: in many cases, the bearing corrosion phenomenon happens, there are many reasons cause bearing corrosion, one of the most common in our daily life has the following several factors. 1) Due to the bad sealing device, such as moisture, dirt; 2) Bearing long-term need not, more than antirust period, lack of maintenance; 3) Metal surface roughness is larger; 4) Contact with corrosive chemical medium, bearing not clean, clean surface dirt from, or in my sweaty hand contact bearings, bearing after cleaning, failed to timely packing or installation, long-term exposure to air, attack by air moisture and contamination; 5) Environmental temperature and humidity and exposure to various environmental medium; Rust inhibitor failure, or did not comply with the quality requirements.