Overall Chamfer+ Thread Thread+Neck Shank Shank Size of Length of length full thread length length length dia. square square L ℓt ℓ ℓn ℓs Ds K ℓk S-SP (for blind hole) Spiral Fluted Taps Short Spiral Fluted Taps, Deep Hole Use Specification (for through hole) Spiral Fluted Taps ■Due to short thread portion, friction becomes less and E lubrication supply becomes better, and S-SP is the spiral Oxide fluted tap quite efficient for tapping deep holes that are 2.5 ~ M2.6 M26 ~ times deeper than the nominal dia. Recommended Tapping Speeds depending on Materials (for through hole) Spiral Pointed Taps Medium carbon steels Alloy steels 5〜10 5〜10 TYPE:1 For icon explanation, refer to P.50 Hand Taps TYPE:2 TYPE:3 Carbide Taps Cemented Roll Taps Oversize Segment:1C Simple Inspection Tools Special Thread Taps Size Class Code Chamfer L ℓt ℓ ℓn ℓs Ds K ℓk No. of Type Stock (mm) (mm) (mm) (mm) (mm) (mm) (mm) (mm) flutes For Metric Threads M2 × 0.4 P1 SSMP2.0E 2.5P 42 4 7.2 12 27 3 2.5 5 2 1 ○ M2.3 × 0.4 P1 SSMP2.3E 2.5P 42 4 7.2 12 27 3 2.5 5 2 1 △ Pipe Taps M2.5 × 0.45 P1 SSMP2.5F 2.5P 46 4 8.1 14 29 3 2.5 5 2 1 △ M2.6 × 0.45 P1 SSMP2.6F 2.5P 46 4 8.1 14 29 3 2.5 5 2 1 △ P1 SSMP3.0G-3 ◎ M3 × 0.5 2.5P 46 5 9 14 26 4 3.2 6 3 1 P3 SSMR3.0G △ M3.5 × 0.6 P1 SSMP3.5H-3 2.5P 52 7 11 16 29 5 4 7 3 1 △ Thread Mills P2 SSMQ4.0I ◎ M4 × 0.7 2.5P 52 7 11 17 29 5 4 7 3 1 P3 SSMR4.0I △ P2 SSMQ5.0K ◎ M5 × 0.8 2.5P 60 9 13 22 33 5.5 4.5 7 3 1 P3 SSMR5.0K △ Dies P2 SSMQ6.0M ◎ M6 × 1 2.5P 62 11 15 26 33 6 4.5 7 3 1 P3 SSMR6.0M △ P2 SSMQ8.0N ◎ M8 × 1.25 2.5P 70 - 12 - 36 6.2 5 8 3 2 P3 SSMR8.0N △ Center Drills M8 × 1 P2 SSMQ8.0M 2.5P 70 - 12 - 36 6.2 5 8 3 2 △ P2 SSMQ010O ◎ M10 × 1.5 2.5P 75 - 13 - 38 7 5.5 8 3 2 P3 SSMR010O △ M10 × 1.25 P2 SSMQ010N 2.5P 75 - 13 - 38 7 5.5 8 3 2 ○ M10 × 1 P2 SSMQ010M 2.5P 75 - 13 - 38 7 5.5 8 3 2 △ Centering Tools P2 SSMQ012P ◎ M12 × 1.75 2.5P 82 - 15 - 42 8.5 6.5 9 3 2 P3 SSMR012P △ M12 × 1.5 P2 SSMQ012O 2.5P 82 - 15 - 42 8.5 6.5 9 3 2 △ JIS ◎=Standard ○=Semi standard △=Made to order SP-42 For improvement, spec may change without advance notice. 359