Roller bearings Info on Jefa rudder bearings and how to make a choice between the different types. BOTTOM BEARINGS Click on the bearing image or text to go to the specific bearing section Bottom roller bearings type 41000 Self-aligning bottom roller bearings type 4S000 Self-aligning bottom roller bearings type 43000 Conical self-aligning bottomroller bearings type 5BT000 PETP self-aligning bottomroller bearings type 6BB PETP bottom roller bearings type 61BB GRP-PETP self-aligningbottom roller bearings type 6T GRP-PETP bottom roller bearings type 61000 GRP-PETP bottom roller bearings type 61000S TOP BEARINGS (for tiller steered boats) Top roller bearings type 42000 Self-aligning top roller bearings type 5T000 Self-aligning top roller bearings type 4SF000 PETP self-aligning top roller bearings type 6BF PETP top roller bearings type 61BF TOP BEARINGS (for wheel steered boats) Top roller bearings with cover for emergency tiller and lock ring on ball race – type 42000Z Self-aligning top roller bearings with cover for emergency tiller and lock ring on ball race – type 4S000Z Self-aligning top roller bearings with cover for emergency tiller – type 5T000Z Self-aligning top roller bearings with hanger type 4SF000H DOUBLE BEARINGS Self-aligning TWIN-PETP roller bearings type 6D TWIN-PETP roller bearings type 6S