If only part of an edge of a straight piece of stock is to be cut on a shaper, the infeed and outfeed fences should be

• A. In line with the edge of the stock
• B. Perpendicular to the edge
• C. Placed far from the edge
• D. At a 45-degree angle to the edge

Answer: (A)

When only part of an edge is being formed on a shaper, you want the guiding fences to align with the edge you’re cutting so the stock remains supported and guided along a straight path through the cutter. Placing the infeed and outfeed fences in line with that edge keeps the portion being cut adjacent to solid support on both sides as it moves past the cutter, which helps produce a clean, even edge and minimizes movement that could cause tear-out or an uneven surface. If the fences were perpendicular or angled away from the edge, the cut would engage the blade at an awkward angle and the stock could tip or chatter, leading to an uneven edge. If the fences are set far from the edge, the unsupported portion can lift or deflect during cutting, also producing a rough result. Keeping the fences in line with the edge provides the most stable, controlled path for the workpiece.