Workshop Clamping & Workholding Basics

When bar clamps hold two board edges together for gluing, how should the clamping pressure be directed relative to the glue line?

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 Correct IncorrectFor this edge-gluing arrangement, direct the clamping pressure across the joint, at right angles to the glue line. CCOHS warns that other pressure directions can allow slipping. This describes the direction, not a universal force or curing time; use the adhesive and clamp instructions for those details.

When bar clamps hold two board edges together for gluing, how should the clamping pressure be directed relative to the glue line?

• Along the glue line, toward the board ends
• At right angles to the glue line, pressing the edges together
• Away from the joint, pulling the edges apart
• In any direction, provided one clamp is very tight