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Pre Ream Drill Size

Pre Ream Drill for 2% Ream

Reamer Diameter
Drill for 2% Ream
Decimal Equivalent
9/16 (0.5625)
35/64
0.5513
1in (1.0000)
24.75MM
0.9800
63/64 (0.9844)
24.40MM
0.9647
31/32 (0.9688)
24.00MM
0.9494
61/64 (0.9531)
23.50MM
0.9340
15/16 (0.9375)
23.25MM
0.9188
59/64 (0.9219)
22.80MM
0.9035
29/32 (0.9062)
22.50MM
0.8881
57/64 (0.8906)
22.00MM
0.8728
7/8 (0.8750)
21.60MM
0.8575
55/64 (0.8594)
21.25MM
0.8422
27/32 (0.8438)
20.80MM
0.8270
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