Crank low friction ball bearings
This type of bearings 6205 HL C4 A has C4 class of radial clearance and rolling bodies (the balls) selected with tight dimensional tolerances. It has a different number of balls compared to the normal balls bearings and therefore can withstand static and dynamic loads comparable to those of the roller bearings, with much lower levels of friction. The grooves are diamond finished to ensure an ultra-low rolling friction.
This item can replace the BC1 1442, in fact the the inner ring has a mounting clearance that permit the installation on crankshaft that in origin are fitted with roller bearings.