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Hole Openers -> Hole Opener / Reamer Sizes & Specs -> Metric Conversions

Hole Opener / Reamer Sizes - Metric Conversions

Metric Measurements (mm)

Hole Opener Size

Min. Pilot Size/
First Ream
Number of
Cones

Cone

Size
660
270
5
406

686

 311
5
406

711

311
5
406

762

311
5
559

863

374
5
559

914

444
5
559

1067

660
5 / 6
660 / 559

1219

813
6 / 7
660 / 559

1371

965
6 / 8
660 / 559

1524

1067
6
660

    

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