Ball Screw Peripherals Support Unit

Support units are dedicated bearing components used as a set with ball screws.
They come in several types: models EK, FK, EF, and FF, which are tailored to fit Model BNK and Model SDA-VZ precision ball screws with finished shaft ends; models EK-L and EF-L, which are for low shaft centers; and models BK and BF, which are standardized for general ball screws.
The support unit on the fixed side includes a JIS Class 5-compliant angular bearing provided with an adjusted preload. The support unit on the supported side uses a deep-groove ball bearing.

Precautions on Use

Types

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Features

Structure and Features

Support units come in several types: models EK, FK, EF, and FF, which are tailored to fit Model BNK and Model SDA-VZ precision ball screws with finished shaft ends; models EK-L and EF-L, which are for low shaft centers; and models BK and BF, which are standardized for general ball screws.
The support unit on the fixed side includes a JIS Class 5-compliant angular bearing provided with an adjusted preload.
The support unit on the supported side uses a deep-groove ball bearing.
The internal bearings of support unit models EK, EK-L, FK, and BK contain an optimal quantity of lithium soap-based grease retained by a special seal, enabling these models to operate over a long period of time.

Uses the Optimal Bearing

To ensure the rigidity balance with the Ball Screw, the Support Unit uses an angular bearing (contact angle: 30°; DF configuration) with a high rigidity and a low torque. Miniature Support Unit models EK/FK 4, 5 and 6 are incorporated with a miniature angular bearing with a contact angle of 45° developed exclusively for miniature Ball Screws. This bearing has a greater contact angle of 45° and an increased number of balls with a smaller diameter. The high rigidity and accuracy of the miniature angular bearing provides the stable rotational performance.

Support Unit Shapes

The square and round shapes are available for the Support Unit to allow the selection according to the intended use.

Compact and Easy Installation

The Support Unit is compactly designed to accommodate the space in the installation site. As the bearing is provided with an appropriately adjusted preload, the Support Unit can be assembled with a Ball Screw unit with no further machining. Accordingly, the required man-hours in the assembly can be reduced and the assembly accuracy can be increased.

Support Unit for Low Shaft Centers EK-L/EF-L

We offer a lineup of support units with specifications that match the shaft end shapes of precision ball screws with finished shaft ends. Combined use with these support units helps reduce design time.