Internal clearance

SKF double row tapered roller bearings of the TDO and TDI configurations generally have an axial internal clearance which is appropriate to a given application. The bearing components must, however, be mounted in the prescribed order.
Double row tapered roller bearings having a clearance other than that of the basic design are identified by a C followed by a three or four-figure number which gives the mean axial internal clearance in μm.
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