ST - STRAIGHT SHANK SHRINK - METRIC A ➚ A .00012 58-60 HRc Ra 4µin G2.5 L max 20,000 RPM L min 4° D1 h6 d1 dD L1 L Designation d D D1 d1 L L1 Ref. Lmin Lmax ST 12x160 SRK 3 3 10 12 4 160 14 10 - ST 12x160 SRK 4 4 10 12 4 160 14 12 27 ST 16x160 SRK 3 3 10 16 6 160 43 10 - ST 16x160 SRK 4 4 10 16 6 160 43 12 - ST 16x160 SRK 5 5 10 16 6 160 43 15 - ST 16x160 SRK 6 6 11 16 6 160 35 18 35 ST 20x200 SRK 5 5 10 20 6 200 71 15 - ST 20x200 SRK 6 6 11 20 6 200 64 18 40 ST 20x200 SRK 8 8 14 20 6 200 43 25 40 ST 25x200 SRK 6 6 11 25 8 200 100 18 35 ST 25x200 SRK 8 8 14 25 8 200 79 25 40 ST 25x200 SRK 10 10 16 25 8 200 64 30 50 ST 25x200 SRK 12 12 20 25 8 200 36 32 52 833