Spiral Fluted Taps (for blind hole)Spiral Fluted Taps(for through hole)Spiral Pointed Taps(for through hole)Hand TapsCementedCarbide TapsRoll TapsSpecial Thread TapsSimple Inspection ToolsPipe TapsThread MillsPremium Thread MillsDiesCenter DrillsCentering Tools JIS ⑪ Center Drills / Centering Tools Drill Shank Overall Drilldia.dia.lengthlengthDcDsLℓ JIS ① CEIR High Helix Center Drills-JIS Type R ② Specification ■The CEIR is a high helix JIS type R center hole drill. ③ ④ TYPE:1 ⑤ Segment:51 ⑥ SizeDc × R × Ds Code Dc (mm) Ds(mm) L(mm) ℓ (mm) Rmax(mm) Rmin(mm) TYPE MSRP 1 × R × 3.15 CE1.0RI 1 3.15 31.5 3 3.15 2.5 1 ¥1,400 1.25 × R × 3.15 CE1.25RI 1.25 3.15 31.5 3.35 4 3.15 1 ¥1,290 1.6 × R × 4 CE1.6RI 1.6 4 35.5 4.25 5 4 1 ¥1,240 ⑦ 2×R×5 CE2.0RI2.5 × R × 6.3CE2.5RI2 5 40 5.3 6.3 5 1 ¥1,0302.56.3456.786.31¥1,120 3.15 × R × 8 CE3.15RI 3.15 8 50 8.5 10 8 1 ¥1,500 4 × R × 10 CE4.0RI 4 10 56 10.6 12.5 10 1 ¥2,740 5 × R × 12.5 CE5.0RI 5 12.5 63 13.2 16 12.5 1 ¥3,670 ⑧ 6.3 × R × 16 CE6.3RI 6.3 16 71 17 20 16 1 ¥7,090 8 × R × 20 CE8.0RI 8 20 80 21.2 25 20 1 ¥14,400 10 × R × 25 CE010RI 10 25 100 26.5 31.5 25 1 ¥25,200 ⑨ ⑩ ⑪ JIS ⑪-31 ※ = Specified Distribution Items. Made to order products.