And then tighten down to 130 lbs. of torque. The bars should be loaded with the heaviest available bumper plates. Small steel plates should only be used to achieve the appropriate weight if it cannot be reached with bumper plates. Loose fitting bumper plates can damage the sleeves, so collars are strongly recommended to stabilize the plates. Collars also reduce the occurrence of the plates sliding down the sleeves on multiple repetition sets.
Olympic bars have needle bearings in the sleeves.
Before use, inspect the sleeves for smooth rotation. The exterior of the Olympic bar should be cleaned and inspected every six months when under heavy daily uses. Use a plastic bristle brush and Simple Green cleaner to remove caulk and crud from the knurling. Then wipe dry with a cotton cloth. Snap rings should only be installed once.