Sealmaster SF-23 is a four-bolt flange-mounted radial ball bearing unit with a fixed, non-expansion design and a 1-7/16 in bore. The unit uses a cast-iron housing with 52100 steel bearings and a felt labyrinth seal, rated for up to 4,650 rpm and a dynamic load of 5,782 lb (3,493 lb static), and it operates from -20 to 250 deg F. Mounting features include a four-bolt flange with a 3-5/8 in bolt-center-to-center spacing, and an overall length of 4-5/8 in. Screws are used to lock the inner bearing (set-screw locking), and the unit is uncoated with a felt seal.
