Reamer Drill Guide

This table, brought to you by P&A Engineering Supplies shows you what size hole you should drill to suit each reamer. When reaming, it is important to be precise and delicate with your job. 

 

DIAMETER OF REAMER
 

PREDRILLING DIAMETER

Two-flute drill

Core Drill

mm

inch

mm

inch

mm

inch

2 - 6

1/16 - 15/64

-0.2

-.008

-0.2

-.008

6 - 10

15/64 - 25/64

-0.3

-.012

-0.25

-.010

10 - 14

25/64 - 9/16

-0.4

-.016

-0.25

-.010

14 - 18

9/16 - 23/32

-0.5

-.020

-0.3

-.012

18 - 30

23/32 - 1.3/16

-0.6

-.024

-0.4

-.016

30 - 50

1.3/16 - 2

-1.0

-.040

-0.5

-.020

 

Sourced from http://www.tapdie.com/


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