Crane accessories bearing structure and function

    With the domestic casting industry, the rapid take-off, how to seize the market, look for business opportunities this year, China has become a prime topic of the casting industry. Among the many electric hoist gantry crane  products Rush market, hoist crane  accessories because of its own applications as well as relatively strong market demand characteristics; but at the same time, as technology advances, the development of all walks of life of the bearing castings accuracy, performance, reliability and other aspects of life and the increasingly high demand, and constantly made new demands.

     Needle roller bearings with cylindrical rollers of roller bearings, relative to its diameter, roller both thin and long. This is called needle roller. Despite having a smaller cross-section, has a higher load bearing capacity, therefore, especially suitable for the radial space-constrained applications. Needle in the proximal surface contour surface at a slight contraction. Needle and roller line contact results can be modified to avoid damaging edge stresses. In addition to catalogs listed can be used for general engineering bearings, such as: electric hoist  gantry crane  Drawn cup needle roller bearings with open, closed Needle roller bearings, needle roller bearings with inner ring and without inner ring Needle bearings.

     Needle roller bearings are generally not attached to the inner ring. Electric hoist gantry crane journal not hardened and grinding of the occasion, you can use the inner listed in the table. Needle roller bearings, needle roller hardened steel outer ring and cage assembly can not be separated. Lubricant storage free space can be extended relubrication intervals. Bearings generally use single design. But the wider specifications bearing 1522,1622,2030,2538 and 3038 series except that they fitted two roller cage assembly. Bearing outer ring with lubrication holes. According to user needs, the shaft diameter greater than or equal to all the separate 7mm Needle roller bearings can be equipped with a lubrication hole of the outer ring.

     Needle roller bearings with seals in the seal can not be installed due to space constraints of the occasion, providing open-ended or closed end Needle roller bearings with seals. Such electric hoist gantry crane bearing equipment polyurethane or synthetic rubber friction seal, which filled with good anti-rust performance lithium grease for operating temperatures from -20 to +100 ℃. Bearing inner ring with seals than the outer width 1mm, this is what makes the bearing shaft relative displacement of the bearing housing with a little work it could ensure a good seal and avoid the risk of bearing contamination. Bearing inner ring also has a greasing hole, according to the needs of the bearing arrangement, supplemented by the outer or inner ring lubrication.