A spiral flute reamer is a precision hole-finishing tool designed to improve dimensional accuracy and surface finish of pre-drilled or bored holes.
Flute Shape: Spiral grooves similar to twist drills, available in left-hand spiral and right-hand spiral types.
Chip Evacuation:
Left-hand spiral flute reamer → Best for through holes, chips are pushed backward, avoiding scratches on the hole surface.
Right-hand spiral flute reamer → Best for blind holes, chips are pulled forward, preventing clogging at the bottom.
Cutting Stability: Compared with straight flute reamers, spiral flute reamers cut more smoothly, reducing vibration during operation.
Surface Quality: Produces a smoother and more precise hole wall due to continuous cutting action.
Through holes → left-hand spiral flute reamer
Blind holes → right-hand spiral flute reamer
Workpiece materials: steels, cast iron, non-ferrous metals, depending on tool substrate and coating
In short, a spiral flute reamer is a reamer with helical cutting grooves that provides smoother cutting, better chip removal, and improved hole quality compared to straight flute reamers.
