... -row or double-row 3. Nylon,steel,brass cage IKO Self-aligning Ball Bearing:Self-aligning Ball Bearing has two rows of balls and a common concave sphered ... shaft deflections or misalignment are to be expected. Additionally, the self-aligning ball bearing has the lowest friction of all rolling bearings, which enables ... ,steel,brass cage;also 2RS type can be manufactured. IKO Self-aligning Ball Bearing