INDEXABLE MILLING y Ramping / Helical Milling Blind holes, a Ramping a Helical Milling Flat bottom Through holes L Pitch Pitch (P) (P) L= APMXtan % RMPX APMX DC DC DC Hole Hole diameter diameter (DH) (DH) Cutting Edge Insert Ramping Helical Milling (Blind Hole, Flat Bottom) Helical Milling (Through Hole) HolderTypeDiameterDC(inch)Corner RadiusRE(inch)MaximumRamping AngleRMPXMinimum Distance Maximum Hole Diameter Maximum Pitch Minimum Hole DiameterL (inch) *1DH max.(inch)P max.(inch)DH min.(inch)Maximum PitchP max.(inch)Minimum Hole DiameterDH min.(inch)Maximum PitchP max.(inch) .787[20 mm] .016─.047.063─.094.118─.12620.7°19.9°18.9°1.651.691.811.5241.4291.319*2*3*4.551.512.4721.4211.3621.311 .551 .866 .079.512.866.079.472.866.039 .016─.047 22.6°1.000.063─.09422.1°1.501.541.9491.854*2*3.551.512 1.8321.766 .551 1.267 .315.5121.267.315 .118─.126 20.7° 1.65 1.728 *4 .472 1.707 .472 1.267 .315 1.102[28 mm] .016─.047.063─.094.118─.12619.2°18.5°16.7°1.77 2.154 *2 .5511.852.059*3.5122.051.949*4.4722.0471.9841.925.551 1.417 .315.5121.417.315.4721.417.276 .016─.047 15.6° 2.20 2.449 *2 .551 2.331 .551 1.762 .433 1.250 .063─.094 14.9° 2.32 2.354 *3 .512 2.264 .512 1.762 .394 .118─.126 14.0° 2.48 2.244 *4 .472 2.203 .472 1.762 .394 1.378[35 mm] .016─.047.063─.094.118─.12613.4°12.7°11.8°2.60 2.705 *2 .5512.712.610*3.5122.952.500*4.4722.5912.5312.472.551 1.969 .433.5121.969.394.4721.969.354 .016─.047 13.0° 2.68 2.933 *2 .551 2.827 .551 2.262 .512 A 1.500 .063─.094 12.3°.118─.12611.6°2.832.99 2.8392.728*3*4 .512.472 2.7602.701 .512 2.262 .512.4722.262.472 .016─.0472.000.063─.0948.7°8.2° 4.024.25 3.9333.839*2*3 .551.512 3.8273.757 .551 3.258 .551.5123.257.512 .118─.126 7.6° 4.61 3.728 *4 .472 3.696 .472 3.257 .472 .016─.047 6.6° 5.28 4.933 *2 .551 4.824 .551 4.259 .551 2.500 .063─.094 6.1° 5.75 4.839 *3 .512 4.756 .512 4.259 .512 .118─.126 5.7° 6.14 4.728 *4 .472 4.695 .472 4.258 .472 .016─.047 5.3° 6.61 5.933 *2 .551 5.824 .551 5.260 .551 L 3.000 .063─.094 4.9° 7.13 5.839 *3 .512 5.756 .512 5.260 .512.118─.1264.5°7.765.728*4.4725.746.4725.259.472 .016─.047 3.8° 9.21 7.933 *2 .551 7.824 .551 7.261 .551 4.000 .063─.094 3.5° 10.00 7.839 *3 .512 7.755 .512 7.261 .512 .118─.126 3.2° 10.94 7.728 *4 .472 7.694 .472 7.260 .472 .016─.047 2.9° 12.05 9.933 *2 .551 9.823 .551 9.261 .551 5.000 .063─.094 2.7° 12.95 9.839 *3 .512 9.755 .512 9.261 .512 .118─.126 2.5° 14.02 9.728 *4 .472 9.693 .472 9.260 .472 Note 1) Ramping, helical, and drilling are not recommended for machining of steel and titanium alloys. L164 INDEXABLE MILLING