Rexnord ZEF5108 Flange Block Roller Bearings

Rexnord ZEF5108 is a 1-1/2 in bore, four-bolt square flange block that houses a Rex Spherical Roller Bearing (Type E) for fixed mounting. The cast-iron housing is powder-coated black and accepts a 5108U insert with a double setscrew locking collar and a clearance seal, plus relubrication capability via a 1/8 NPT grease fitting. This unit provides misalignment capability of ±2.0° (dynamic), a radial dynamic load rating of 27,820 lb, and a static load rating of 28,700 lb. The flange features a 5.5 in bolt circle with four 1/2 in mounting bolts; bore length is through-bored to 1.5 in with a length-through-bore of 3.81 in, and overall dimensions are approximately 6.75 in long, 6.75 in wide, and 3.34 in high. It operates up to 4,450 rpm and up to 225°F (107°C). The cage is engineered polymer, and the primary seal is a steel clearance seal with optional seal configurations. This ZEF5108 belongs to Rexnord’s 5000-series flange blocks and is specified for fixed, four-bolt mounting in applications requiring a 1.5 in bore.