Workshop Clamping & Workholding Basics

A hand-operated clamp is not designed for wrench tightening. Which response is appropriate if you think it needs more tightening force than you can apply by hand?

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 Correct IncorrectDo not improvise extra leverage with a wrench or pipe on a clamp that is not designed for it. Stop and reassess whether the clamp and setup suit the task. CCOHS permits wrench use only on clamps specifically designed for wrenches; that exception is not permission to use one on an ordinary hand-operated clamp.

A hand-operated clamp is not designed for wrench tightening. Which response is appropriate if you think it needs more tightening force than you can apply by hand?

• Use a wrench as long as its jaws fit the handle
• Slide a pipe over the handle for more leverage
• Tap the handle with a hammer until the screw turns
• Stop and reassess the clamp and setup instead of adding leverage