Most of them belong to the Double row angular contact bearings. Their feature is a pair of single row angular contact ball bearings arranged back to back, thus requiring less space. Double row angular contact bearings provide very stiff and rigid bearing arrangements. They are also able to accommodate combined loads, and are very suitable for supporting tilting moments. Our double row angular contact bearings are mounted with nylon cages and pressed steel cages as part of their normal design. However, we can also provide other material products in your requirements. Bigger sizes we would suggest brass cage mounted inside (suffixed 'M'). Typical applications: magnetic clutches, crankshafts, pulleys, escalators Listing parts of number as follow: DAC255200206 DAC28580042 DAC30600337 DAC34620037 DAC35680037 DAC36680033 DAC39680037 DAC37720437 ?