Flange bearing unit ZKFS series

with ball bearingcast irongraphite

Square Piloted 4-Bolt Flange Units Variations of tolerance of spigot joint outside diameter (3H3s), vartiations of tolerance of distance form mounting surface to center of spherical bore (3A2s), tolerance of position of bolt hole (X), and tolerance of circumferential runout of spigot joint (Y) Variations of tolerance of bolt hole diameter (3Ns) Tapered bore (with adapter) d1 20 ~ 55 mm 1. In Part No. of unit and units with covers, fi tting codes follow bore diameter munbers. 2. Part No. of applicable grease fi ttings are shown below. A-1/4-28UNF..........305~308 A-R1/8......................309~312 3. In Part No. of bearing with adapters, turn UK in the Part No. shown in the dimensional tables to ZK.(Example of Part No. : ZK306) 4. As for the triple seal type product, suffi x code L3 follows the Part No. of unit or bearing. (Example of Part No. : ZKFS306JL3) 5. For the dimensions and forms of applicable bearings and adapters, see the dimensional tables of ball bearing for unit and adapter. 6. Representative examples of the forms of housing are indicated. 7. Housings of nodular graphite cast iron are also available.