Mechanical Conduit Benders

A hand bender uses body leverage on a long handle to bend conduit and works well on smaller EMT sizes (typically up to 1 in) where the force required is manageable by hand. A hydraulic bender uses a hydraulic ram to generate much higher force, needed for larger diameter or heavier-wall rigid and IMC conduit that would be impractical or unsafe to bend by hand leverage alone.

The deduct (or 'take-up') is the amount you subtract from your desired stub-up length to determine where to mark the conduit before bending, because the bending process itself consumes some length as the conduit curves — this deduct value is specific to each bender model and conduit size and is usually printed on the bender's shoe or in its instructions.

No — each bender shoe is manufactured with a radius matched to one specific conduit trade size and type, since the minimum bend radius allowed by the National Electrical Code differs by conduit size and using an undersized shoe risks kinking the conduit or violating the code's minimum bend radius, which can restrict wire pulling through the finished run.

Mark the conduit at the deduct-adjusted point, align the bender's arrow or star point mark with that mark on the conduit, then bend while watching the bender's degree scale (or a level, for some benders) until you reach 90 degrees — most benders include a built-in indicator specifically so you don't need a separate protractor for common bend angles.

Beyond roughly 1 in to 1-1/4 in trade size, especially for rigid or IMC conduit with thicker pipe walls, the force needed to form a clean bend without kinking exceeds what most people can generate through hand leverage alone — a hydraulic bender applies controlled, high force through a ram, producing consistent bends on larger conduit sizes without excessive physical strain.