Basics of End Supports

Rigid-Free

One end of the screw is fixed by a “C” type bearing block with spaced angular contact bearings to prevent radial and axial movement. The other end is not supported.

Simple-Simple

Each end is supported by either an “A” type bearing block for radial support, or a “B” type bearing block for radial and axial support.

Rigid-Simple

One end is fixed by a “C” type bearing block. The other end is supported by an “A” type bearing block for radial support, or a “B” type bearing block for radial and axial support.

Rigid-Rigid

Both ends are fixed by “C” type bearing blocks for maximum ballscrew assembly stiffness and to prevent radial and axial movement.

Single radial ball bearing (Type A)

Type A & A1 bearing blocks use a single sealed radial ball bearing to provide simple radial end support. They are primarily used to prevent whipping and radial deflection of the ballscrew centerline in light load applications where axial positioning accuracy is not critical.

Duplex bidirectional angular contact (Type B)

Type B & B1 bearing blocks feature duplex, bidirectional angular contact bearings to control Axial movement of the screw. They also provide Higher axial thrust and radial load capacities than “A” type bearing blocks.

Spaced bidirectional angular contact bearings (Type C)

Type C and C1 bearing blocks have spaced, bidirectional angular contact bearings to provide the rigid end support needed to achieve higher speeds and increased stiffness of the overall ballscrew assembly.