Sherwood machine reamers are used to produce a close tolerance surface finish by enlarging pre-drilled holes to a finished size. Manufactured from HSS with a 45 bevelled head. Conform to BS 122 : Part 2 and BS 328 Part 4.

INCH TOLERANCES:
Diameter: ~ up to 7/64". Tolerance: +0.0003, -0.0001.
Diameter: Over 7/64" ~ up to 15/64". Tolerance: +0.0004, -0.0002.
Diameter: Over 15/64" ~ up to 25/64". Tolerance: +0.0005, -0.0002.
Diameter: Over 25/64 ~ up to 43/64". Tolerance: +0.0006, -0.0003.
Diameter: Over 43/64 ~ up to 1 1/8". Tolerance: +0.0007, -0.0004.
Diameter: Over 1 1/8" ~ up to 1 1/2". Tolerance: +0.0008, -0.0004.
Diameter: Over 1 1/2" ~ up to 2". Tolerance: +0.0010, -0.0005.