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<strong>Ball</strong> BeaRIngs<br />
INTRODUCTION<br />
<strong>Ball</strong> bearing housed units are available in a wide variety of types and sizes to<br />
accommodate a complete range of operating conditions.<br />
These units generally have cast iron housings and are designed for mounting on<br />
straight shafts with a slip fit. The self-locking collar and the setscrew inner bearing<br />
designs provide ease in mounting. Bolt holes in housings take standard bolts for<br />
assembling these units to machinery frames. Several series are also available with<br />
the concentric locking collar.<br />
Most units are made with a self-aligning feature, and it is unnecessary for the user<br />
to refine the design in excess of practical limits. Units incorporating prelubricated wide<br />
inner ring bearings may be furnished without grease fittings.<br />
Several basic types of housed units are available: pillow blocks, flanged cartridges,<br />
flangette units, cylindrical cartridges and take-up units. The type required is determined<br />
by its application and mounting requirements. Within the basic type selected,<br />
variations allow for load factors, shaft sizes, mounting surface dimensions, base to<br />
shaft centerline heights and lubrication requirements.<br />
PILLOW BLOCKS<br />
Pillow blocks, the most commonly used type of mounted units, are designed to<br />
provide shaft support where the mounting surface is parallel to the shaft axis. The<br />
bolt holes are usually slotted for adjustment during mounting.<br />
Pillow blocks are supplied in a variety of configurations. Pressed steel and rubber<br />
pillow blocks are also available for light-duty applications.<br />
FLANGED CARTRIDGES<br />
Flanged cartridges are used where a shaft passes through the machine frame at a<br />
right angle. A four-bolt mounting is the most common, however, where the mounting<br />
area is restricted, three- and two-bolt versions are available. A piloted flanged cartridge<br />
provides additional mounting accuracy and support.<br />
Flanged cartridges are supplied in both standard and heavy-duty series. Iron and<br />
rubber flanged cartridges are also available.<br />
A complete line of flangette units, or pressed-steel flanged cartridges, provides an<br />
economical solution to light-duty applications. Two-, three- and four-bolt mountings<br />
are available along with a relubricable version.<br />
CYLINDRICAL CARTRIDGES<br />
Cylindrical cartridges, like flanged cartridges, provide shaft support<br />
where the shaft axis is perpendicular to and passing through a machined housing<br />
which is generally very thick. The outside diameter of the cylindrical cartridges permits<br />
mounting with a press fit into a straight, through-bored housing.<br />
Cylindrical cartridges have a machined spherical bearing seat to provide initial<br />
shaft alignment in standard-duty applications. Synthetic, conductive rubber cylindrical<br />
cartridges are available for applications where low-cost, light-duty, low-noise<br />
operation is essential.<br />
TAKE-UP UNITS<br />
Take-up units are used where shaft adjustment and belt tightening devices are<br />
required, such as conveyor applications. Frames for take-up units provide for either<br />
side or top mounting.<br />
Take-up units are available in cast iron for standard-duty and pressed steel for<br />
economical, light-duty applications.<br />
D78 TIMKEN PRODUCTS CATALOG
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