Center Drills/Centering Tools Drill Shank Tool end Overall Cutting edge Body − dia. dia. dia. length length length D2 Ds Dc L ℓ ℓ2 H Spiral Fluted Taps (for blind hole) JO-CSQM Joint- Countersinks 90°, Drilling Machine Use Spiral Fluted Taps (for through hole) Specification For icon explanation, refer to P.50 Spiral Pointed Taps (for through hole) TYPE:1 Hand Taps Cemented Carbide Taps Segment:5C Size Code Ds Dc L ℓ ℓ2 H Adaptable holder Type Stock D2 ×θ (mm) (mm) (mm) (mm) (mm) (mm) Shank dia 16 × 90° JCS016QM9 10 3.2 37.5 20 27.5 8 14 1 ○ 20 × 90° JCS020QM9 12 4 43.5 24 32.5 10 16 1 ○ Roll Taps Special Thread Taps Simple Inspection Tools Pipe Taps Thread Mills Dies Center Drills Centering Tools JIS CE-39 ◎=Standard ○=Semi standard △=Made to order 678 For improvement, spec may change without advance notice.