HSK - THERMAL SHRINK HOLDER - METRIC Taper SizeHSK-A 63 A ➚ A .00012 50-52 HRc Ra 4µin N5 Lmax G2.5 Lmin 25,000 RPM 4˚ HSK dD D1 J L2 L1 L Designation d D1 D L L1 L2 Lmin Lmax J Hex Key HSK A 63 SRK 3X 50 3 17.0 10 76 50 10 16 M6 3 HSK A 63 SRK 3X 85 3 21.0 10 111 85 79 10 16 M6 3 HSK A 63 SRK 4X 50 4 17.0 10 76 50 12 18 M6 3 HSK A 63 SRK 4X 85 4 21.0 10 111 85 79 12 18 M6 3 HSK A 63 SRK 5X 50 5 17.0 10 76 50 15 21 M6 3 HSK A 63 SRK 5X 85 5 21.0 10 111 85 79 15 21 M6 3 HSK A 63 SRK 6X 50 6 18.0 11 76 50 18 24 M8 4 HSK A 63 SRK 6X 85 6 22.0 11 111 85 79 18 24 M8 4 HSK A 63 SRK 8X 50 8 20.0 14 76 50 43 25 36 M6 3 HSK A 63 SRK 8X 85 8 23.0 14 111 85 64 25 36 M6 3 HSK A 63 SRK 10X 50 10 23.0 16 76 50 30 41 M8 4 HSK A 63 SRK 10X 85 10 26.0 16 111 85 72 30 41 M8 4 HSK A 63 SRK 12X 50 12 27.0 20 76 50 32 43 M8 4 HSK A 63 SRK 12X 85 12 30.0 20 111 85 72 32 43 M8 4 762