Center Drills/Centering Tools Drill Shank − Maximum Overall Drill Larger cut dia. dia. dia. length length length Dc Ds D1 D2 L ℓ ℓ2 Spiral Fluted Taps (for blind hole) CESC High Helix Center Drills-JIS Type C 60° Spiral Fluted Taps (for through hole) Specification For icon explanation, refer to P.50 Spiral Pointed Taps (for through hole) TYPE:1 TYPE:2 3 3 Taps 120 120 Hand Cemented Carbide Taps Segment:51 Size Code Ds D1 D2 L ℓ ℓ2 Type Stock Dc ×θ× Ds (mm) (mm) (mm) (mm) (mm) (mm) 0.5 × 60゜× 3.15 CEC0.5 3.15 1.6 1.06 31.5 0.8 0.6 1 ○ 0.63 × 60゜× 3.15 CEC0.63 3.15 2 1.32 31.5 1 0.8 1 ○ Roll Taps 0.8 × 60゜× 3.15 CEC0.8 3.15 2.5 1.7 31.5 1.2 1 1 ○ 1 × 60゜× 3.15 CEC1.0 3.15 3.15 2.12 31.5 1.5 1.2 2 ○ 1.25 × 60゜× 4 CEC1.25 4 4 2.65 35.5 1.9 1.5 2 ○ 1.6 × 60゜× 5 CEC1.6 5 5 3.35 40 2.4 1.8 2 ○ Special Thread Taps Simple Inspection Tools 2 × 60゜× 6.3 CEC2.0 6.3 6.3 4.25 45 3 2.2 2 ○ 2.5 × 60゜× 8 CEC2.5 8 8 5.3 50 3.8 3 2 ○ 3.15 × 60゜× 10 CEC3.15 10 10 6.7 56 4.8 3.5 2 ○ 4 × 60゜× 12.5 CEC4.0 12.5 12.5 8.5 63 6 4.2 2 ○ 5 × 60゜× 16 CEC5.0 16 16 10.6 71 7.5 5.5 2 ○ Pipe Taps 6.3 × 60゜× 18 CEC6.3 18 18 13.2 75 9.2 5.5 2 ○ 8 × 60゜× 22.4 CEC8.0 22.4 22.4 17 90 11.5 5.5 2 ○ 10 × 60゜× 28 CEC010 28 28 21.2 112 14.2 7 2 ○ Thread Mills Dies Center Drills Centering Tools JIS CE-25 ◎=Standard ○=Semi standard △=Made to order 664 For improvement, spec may change without advance notice.