The approximate length of the tapered section is 50% of the total flute length. The normal tolerance on the full diameter is greater than that used for other types of machine reamers.The shorter length permits their use in cramped quarters where Bridge Reamers cannot enter.
. Commonly used on bridgework, ship construction and structural steel fabrication where extreme accuracy of diameter is important.Reamers have pilot type points for alignment purposes and easy entry into small and off-center holes.