Two Useful Shop Tools

A Lever-Arm Retractable Caster

The uses for a retractable caster in both the scene shop and onstage are many. There are many designs for this bit of hardware, but few are as easy to manufacture as that illustrated in Figure 1. The caster’s vertical movement is executed with the now familiar lever-arm toggle clamp. Some of these clamps, such as McMaster-Carr’s 5093A58, feature ...

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