Page 105 - Mechanical Engineer's Data Handbook

94 MECHANICAL ENGINEER’S DATA HANDBOOK

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Self-aligning ball, Two rows of balls in staggered arrangement. Outer
double row race with spherical surface

Double row Used for larger loads without increase in outer
ball journal diameter

Roller journal For high radial loads but no axial load. Allows axial
sliding

Self-aligning Barrel shaped rollers. High capacity. Self-aligning
spherical roller

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Taper roller Takes radial and axial loads. Used in pairs for thrust
in either direction

Needle rollers These run directly on the shaft with or without cages.
Occupy small space

Shields, seals Shields on one or both sides prevent ingress of dirt.
and grooves Seals allow packing with grease for life. A groove
allows fitting of a circlip for location in bore.

Shields Shields and seals Circllp groove