Pulley Block Fabrikator

The Y pulleys of the Fabrikator don't have any bearings. This thing can solve that issue. It fits 5x13x4mm bearings like these: http://nl.aliexpress.com/item/10pcs-Skate-board-bearing-695ZZ-695-2Z-695-Z-5x13x4-mm-2015-new-coming-shoe-bearing/32380092967.html?ws_ab_test=201556_10,201527_4_71_72_73_74_75,201409_1

The part is split into 3 parts to make it easier to print. The existing roller and axle can be re used. The grooves in the axle are 1mm too close to eachother, so only one clip can be