Boca Bearing Company

The purpose of a radial bearing is to reduce rotational friction and support loads. This is achieved by using two races to hold the balls and to spread the load through the balls. As the bearing race rotates it causes the balls to rotate. The ball provides for substantially less rolling resistance and coefficient of friction than if two flat surfaces were rotating.
Single-row, deep groove radial ball bearings are the most common bearing type, having a wide range of applications. Radial bearings are made with very high levels of precision and used in applications where rotational performance and low torque is necessary, but load is a secondary issue. Deep-groove bearings however do have higher load ratings for their size than shallow-groove ball bearings, but are also less tolerant of misalignment.

Ceramic hybrid ball bearings use ceramic balls. Ceramic balls weigh up to 40% less than steel balls, depending on size. This reduces centrifugal loading and skidding, so hybrid ceramic bearings can operate up to 50% faster than conventional bearings. This means that the outer race groove exerts less force inward against the ball as the bearing spins. This reduction in force reduces the friction and rolling resistance. The lighter ball allows the bearing to spin faster, and uses less energy to maintain its speed. Ceramic hybrid ball bearings use these ceramic balls in place of steel balls. They are constructed with steel inner and outer rings, but ceramic balls so they are known as hybrids.

Bearings with a flange on the outer ring simplify axial location. The housing for such bearings can consist of a through-hole of uniform diameter, but the entry face of the housing (which may be either the outer or inner face) must be machined truly normal to the hole axis. However such flanges can be expensive to manufacture. Metric Inch DIMENSION PART # PRICE 1 x 3 x 1 SMF681 $17.95 1 x 4 x 1.6 SMF691 $11.95 1.5 x 4 x 1.2 SMF681-X $11.95 1.5 x 4 x 2 SMF681X-ZZ $12.95 1.5 x 5 x 2 SMF691-X $11.95 1.5 x 5 x 2.6 SMF691X-ZZ $12.95 1.5 x 6 x 3 MF601X-ZZ $10.80 2 x 5 x 1.5 MF52 $10.80 2 x 5 x 1.5 SMF52 $10.80 2 x 5 x 1.5 SMF52 $10.80 2 x 5 x 1.5 SMF682C #5 $27.95 2 x 5 x 2 MF52/W2 $9.95 2 x 5 x 2.3 MF682-ZZ $8.95 2 x 5 x 2.3 SMF682-ZZ $10.80 2 x 5 x 2.3 SMF682-ZZ #3 PS2 $11.95 2 x 5 x 2.3 SMF682C-YZZ NB2 $15.95 2 x 5 x 2.5 MF52-ZZ $9.95 2 x 5 x 2.5 SMF52C-YZZ #5 NB2 $15.95 2 x 6 x 2.3 MF692 $10.80 2 x 6 x 2.3 MF692(X) $10.80 2 x 6 x 2.5 MF62-ZZ $7.95 2 x 6 x 2.5 MF62-ZZ $7.95 2 x 6 x 2.5 SMF62-ZZ #3 $11.95 2 x 6 x 2.5 SMF62C-YZZ NB2 $13.95 2 x 6 x 2.5 SMF62C-ZZ #3 $24.95 All Flanged Series Radial Bearings Metric Sizes Inch Metric DIMENSION PART # PRICE 0.0400 x 0.1250 x 0.0469 SFR09 $24.95 0.0469 x 0.1562 x 0.0625 SFR0 $11.95 0.0469 x 0.1562 x 0.0937 SFR0-ZZ $11.95 0.0550 x 0.1875 x 0.0787 SFR1 $11.95 0.0550 x 0.1875 x 0.1094 SFR1-ZZEE $12.95 0.0781 x 0.2500 x 0.1406 FR1-4ZZ $8.99 0.0781 x 0.2500 x 0.1406 SFR1-4ZZ $9.95 0.0781 x 0.2500 x 0.1406 SFR1-4ZZ #3 $10.80 0.0781 x 0.2500 x 0.1406 SFR1-4ZZEE $12.95 0.0781 x 0.2500 x 0.1406 SFR1-4C-ZZ #3 L01 $24.95 0.0937 x 0.1875 x 0.0625 SFR133 $7.95 0.0937 x 0.1875 x 0.0625 FR133 $8.95 0.0937 x 0.1875 x 0.0625 SFR133C #5 $24.95 0.0937 x 0.1875 x 0.0937 FR133-ZZ $7.25 0.0937 x 0.1875 x 0.0937 SFR133-ZZ $8.25 0.0937 x 0.1875 x 0.0937 SFR133-ZZ #3 $9.95 0.0937 x 0.1875 x 0.0937 SFR133-ZZEE #3 PS2 $10.80 0.0937 x 0.1875 x 0.0937 SFR133-ZZ #7 $12.50 0.0937 x 0.1875 x 0.0937 SFR133C-ZZ #5 $24.95 0.0937 x 0.3125 x 0.1094 FR1-5 $8.55 0.0937 x 0.3125 x 0.1406 SFR1-5ZZ $8.25 0.0937 x 0.3125 x 0.1406 FR1-5ZZ $8.95 0.1250 x 0.2500 x 0.0937 FR144 $5.95 0.1250 x 0.2500 x 0.0937 SFR144 #3 $7.95 0.1250 x 0.2500 x 0.0937 SFR144-EE $7.95