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Journal Dimensioning for Machined Ball or Lead Screws

From Specialty Motions, Inc.

Incorporation of Geometric Dimensioning and Tolerancing (GD&T) is useful in defining competent journal requirements in linear motion applications. Dependent upon how the journal / screw is dimensioned could lead to drastically different results.

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Linear Actuators
Electric linear actuators have an output rod that provides linear motion via a motor driven ball screw, lead screw, or ACME screw assembly. The actuator's load is attached to the end of a screw or rod and is often unsupported.
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ASME - ASME Y14.5 Standard on Geometric Dimensioning
Top practitioners consider ASME's Y14.5 Standard on Geometric Dimensioning and Tolerancing essential for communicating design intent -- that parts from technical drawings have the desired form, fit,... (read more)
ASME Standards and Certification - Y14.5 – 2009 Dimensioning and Tolerancing
The Y14.5 standard is considered the authoritative guideline for the design language of geometric dimensioning and tolerancing (GD&T.) It establishes uniform practices for stating and interpreting... (read more)
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