Workpiece Fixture & Design Principles

Locating and clamping are the critical functions of any workholder. As such, the fundamental principles of locating and clamping, as well as the numerous standard components available for these operations, must be thoroughly understood.

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The best clamp for an application is one that can adequately hold the workpiece without significant surface damage.

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Clamping-force calculations can be quite complicated. Sometimes an approximate method is good enough. See table below for how much clamping force is available from manual clamp straps of various sizes (with a 2-to-1 clamping-force ratio) to compare with power-clamp forces.

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Download the Kindle version of the Carr Lane Jig & Fixture Handbook (Third Edition) on Amazon. This handbook is a multi-chapter, illustrated reference manual featuring step-by-step instructions on Jigs and Fixtures with information on hundreds of components.

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