Reamer Terminology
Machine Chucking Reamer - Used primarily in machines such as turret lathes, transfer lines, numerical control, etc. for production reaming.
Hand Reamer - Used primarily by hand utilizing wrench and driven by the square. Excellent for tool and die work, machine and repair shop. May be machine driven in some cases.
Shank - The part of the reamer which is held and driven.
Neck - The section of reduced diameter between the body and the shank.
Diameter - The diameter over the body of the reamer measured at the point.
Chamfer - The leading cutting edge of the reamer, usually 45º.
Clearance - The relief on the outside diameter of the reamer, usually running to a theoretically sharp edge or cylindrical margin as the material to be reamed dictates.
Flutes - Helical or straight grooves cut or formed in the body of the reamer to permit chip flow and form lands for proper clearance.
Overall Length - The length from the extreme end of the shank to the extreme end of the body section. Does not include conical point when used as in structural reamers.
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