The straight-flute design is recommended for most general purpose reaming.
Chucking Reamers are designed for accurate reaming in most materials using all types of equipment including screw machines, turret lathes, drill presses, and machining centers.1260 HSS Dowel Pin Reamer It is recommended over the straight-flute for more difficult materials, better surface requirements, and applications with an interruption such as a keyway or cross hole.. The right-hand spiral-flute reamer has the smooth, chatter-free action necessary for fine finishes.