This is a 5311-ZZ double row angular contact ball bearing. It has an inner diameter 55 mm, outer diameter 120 mm and width 49.213 mm.
Double row angular contact ball bearings have two single row angular contact ball bearings arranged back-to-back. It forms a compact configuration to provide simultaneous radial and axial loads.
This bearing has non-contact metal shields on both sides to protect the bearing from dust or any possible contamination, which can extend bearing life, and retain the lubricant in the bearing.
NZ $62.26 each
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