{ "format": "jobline-shop-reference", "version": "1.0", "publishedAt": "https://jobline.ai/reference/jobline-shop-reference.json", "sources": { "tapDrills": "Machinery's Handbook, 31st ed.; ASME B1.1 (Unified), ASME B1.13M (metric)", "drillSizes": "ASME B94.11M number and letter drill sizes; fractions exact", "npt": "ASME B1.20.1; tap drills without reaming per Machinery's Handbook", "cuttingSpeeds": "HSS bands: https://littlemachineshop.com/pages/cutting-speeds; carbide and feeds are conservative JobLine starting estimates, not manufacturer limits" }, "tapDrills": [ { "thread": "#1-64", "series": "UNC", "tpi": 64, "pitchMm": 0.3969, "basicMajor": 0.073, "basicPitch": 0.0629, "basicMinor": 0.0538, "units": "in", "tapDrill75": "#53", "tapDrill75Dec": 0.0595, "tapDrill50": "#52", "tapDrill50Dec": 0.0635, "stiTapDrill": "#43", "stiTapDrillDec": 0.089 }, { "thread": "#2-56", "series": "UNC", "tpi": 56, "pitchMm": 0.4536, "basicMajor": 0.086, "basicPitch": 0.0744, "basicMinor": 0.0641, "units": "in", "tapDrill75": "#50", "tapDrill75Dec": 0.07, "tapDrill50": "#49", "tapDrill50Dec": 0.073, "stiTapDrill": "#41", "stiTapDrillDec": 0.096 }, { "thread": "#3-48", "series": "UNC", "tpi": 48, "pitchMm": 0.5292, "basicMajor": 0.099, "basicPitch": 0.0855, "basicMinor": 0.0734, "units": "in", "tapDrill75": "#47", "tapDrill75Dec": 0.0785, "tapDrill50": "#44", "tapDrill50Dec": 0.086, "stiTapDrill": "#37", "stiTapDrillDec": 0.104 }, { "thread": "#4-40", "series": "UNC", "tpi": 40, "pitchMm": 0.635, "basicMajor": 0.112, "basicPitch": 0.0958, "basicMinor": 0.0813, "units": "in", "tapDrill75": "#43", "tapDrill75Dec": 0.089, "tapDrill50": "#41", "tapDrill50Dec": 0.096, "stiTapDrill": "#31", "stiTapDrillDec": 0.12 }, { "thread": "#5-40", "series": "UNC", "tpi": 40, "pitchMm": 0.635, "basicMajor": 0.125, "basicPitch": 0.1088, "basicMinor": 0.0943, "units": "in", "tapDrill75": "#38", "tapDrill75Dec": 0.1015, "tapDrill50": "#36", "tapDrill50Dec": 0.1065, "stiTapDrill": "#29", "stiTapDrillDec": 0.136 }, { "thread": "#6-32", "series": "UNC", "tpi": 32, "pitchMm": 0.7938, "basicMajor": 0.138, "basicPitch": 0.1177, "basicMinor": 0.0997, "units": "in", "tapDrill75": "#36", "tapDrill75Dec": 0.1065, "tapDrill50": "#32", "tapDrill50Dec": 0.116, "stiTapDrill": "#25", "stiTapDrillDec": 0.1495 }, { "thread": "#8-32", "series": "UNC", "tpi": 32, "pitchMm": 0.7938, "basicMajor": 0.164, "basicPitch": 0.1437, "basicMinor": 0.1257, "units": "in", "tapDrill75": "#29", "tapDrill75Dec": 0.136, "tapDrill50": "#27", "tapDrill50Dec": 0.144, "stiTapDrill": "#18", "stiTapDrillDec": 0.1695 }, { "thread": "#10-24", "series": "UNC", "tpi": 24, "pitchMm": 1.0583, "basicMajor": 0.19, "basicPitch": 0.1629, "basicMinor": 0.1389, "units": "in", "tapDrill75": "#25", "tapDrill75Dec": 0.1495, "tapDrill50": "#20", "tapDrill50Dec": 0.161, "stiTapDrill": "#10", "stiTapDrillDec": 0.1935 }, { "thread": "#10-32", "series": "UNC", "tpi": 32, "pitchMm": 0.7938, "basicMajor": 0.19, "basicPitch": 0.1697, "basicMinor": 0.1517, "units": "in", "tapDrill75": "#21", "tapDrill75Dec": 0.159, "tapDrill50": "#16", "tapDrill50Dec": 0.177, "stiTapDrill": "#3", "stiTapDrillDec": 0.213 }, { "thread": "1/4-20", "series": "UNC", "tpi": 20, "pitchMm": 1.27, "basicMajor": 0.25, "basicPitch": 0.2175, "basicMinor": 0.1887, "units": "in", "tapDrill75": "#7", "tapDrill75Dec": 0.201, "tapDrill50": "7/32\"", "tapDrill50Dec": 0.2188, "stiTapDrill": "F", "stiTapDrillDec": 0.257 }, { "thread": "5/16-18", "series": "UNC", "tpi": 18, "pitchMm": 1.4111, "basicMajor": 0.3125, "basicPitch": 0.2764, "basicMinor": 0.2443, "units": "in", "tapDrill75": "F", "tapDrill75Dec": 0.257, "tapDrill50": "G", "tapDrill50Dec": 0.261, "stiTapDrill": "Q", "stiTapDrillDec": 0.332 }, { "thread": "3/8-16", "series": "UNC", "tpi": 16, "pitchMm": 1.5875, "basicMajor": 0.375, "basicPitch": 0.3344, "basicMinor": 0.2983, "units": "in", "tapDrill75": "5/16\"", "tapDrill75Dec": 0.3125, "tapDrill50": "Q", "tapDrill50Dec": 0.332, "stiTapDrill": "25/64\"", "stiTapDrillDec": 0.3906 }, { "thread": "7/16-14", "series": "UNC", "tpi": 14, "pitchMm": 1.8143, "basicMajor": 0.4375, "basicPitch": 0.3911, "basicMinor": 0.3499, "units": "in", "tapDrill75": "U", "tapDrill75Dec": 0.368, "tapDrill50": "25/64\"", "tapDrill50Dec": 0.3906, "stiTapDrill": "29/64\"", "stiTapDrillDec": 0.4531 }, { "thread": "1/2-13", "series": "UNC", "tpi": 13, "pitchMm": 1.9538, "basicMajor": 0.5, "basicPitch": 0.45, "basicMinor": 0.4056, "units": "in", "tapDrill75": "27/64\"", "tapDrill75Dec": 0.4219, "tapDrill50": "29/64\"", "tapDrill50Dec": 0.4531, "stiTapDrill": "33/64\"", "stiTapDrillDec": 0.5156 }, { "thread": "5/8-11", "series": "UNC", "tpi": 11, "pitchMm": 2.3091, "basicMajor": 0.625, "basicPitch": 0.566, "basicMinor": 0.5135, "units": "in", "tapDrill75": "17/32\"", "tapDrill75Dec": 0.5312, "tapDrill50": "9/16\"", "tapDrill50Dec": 0.5625, "stiTapDrill": "41/64\"", "stiTapDrillDec": 0.6406 }, { "thread": "3/4-10", "series": "UNC", "tpi": 10, "pitchMm": 2.54, "basicMajor": 0.75, "basicPitch": 0.685, "basicMinor": 0.6273, "units": "in", "tapDrill75": "21/32\"", "tapDrill75Dec": 0.6562, "tapDrill50": "11/16\"", "tapDrill50Dec": 0.6875, "stiTapDrill": "49/64\"", "stiTapDrillDec": 0.7656 }, { "thread": "7/8-9", "series": "UNC", "tpi": 9, "pitchMm": 2.8222, "basicMajor": 0.875, "basicPitch": 0.8028, "basicMinor": 0.7387, "units": "in", "tapDrill75": "49/64\"", "tapDrill75Dec": 0.7656, "tapDrill50": "51/64\"", "tapDrill50Dec": 0.7969, "stiTapDrill": "57/64\"", "stiTapDrillDec": 0.8906 }, { "thread": "1\"-8", "series": "UNC", "tpi": 8, "pitchMm": 3.175, "basicMajor": 1, "basicPitch": 0.9188, "basicMinor": 0.8466, "units": "in", "tapDrill75": "7/8\"", "tapDrill75Dec": 0.875, "tapDrill50": "59/64\"", "tapDrill50Dec": 0.9219, "stiTapDrill": "1-1/64\"", "stiTapDrillDec": 1.0156 }, { "thread": "#0-80", "series": "UNF", "tpi": 80, "pitchMm": 0.3175, "basicMajor": 0.06, "basicPitch": 0.0519, "basicMinor": 0.0447, "units": "in", "tapDrill75": "3/64\"", "tapDrill75Dec": 0.0469, "tapDrill50": "#55", "tapDrill50Dec": 0.052, "stiTapDrill": "#49", "stiTapDrillDec": 0.073 }, { "thread": "#1-72", "series": "UNF", "tpi": 72, "pitchMm": 0.3528, "basicMajor": 0.073, "basicPitch": 0.064, "basicMinor": 0.056, "units": "in", "tapDrill75": "#53", "tapDrill75Dec": 0.0595, "tapDrill50": "#52", "tapDrill50Dec": 0.0635, "stiTapDrill": "#45", "stiTapDrillDec": 0.082 }, { "thread": "#2-64", "series": "UNF", "tpi": 64, "pitchMm": 0.3969, "basicMajor": 0.086, "basicPitch": 0.0759, "basicMinor": 0.0668, "units": "in", "tapDrill75": "#50", "tapDrill75Dec": 0.07, "tapDrill50": "#48", "tapDrill50Dec": 0.076, "stiTapDrill": "#42", "stiTapDrillDec": 0.0935 }, { "thread": "#4-48", "series": "UNF", "tpi": 48, "pitchMm": 0.5292, "basicMajor": 0.112, "basicPitch": 0.0985, "basicMinor": 0.0864, "units": "in", "tapDrill75": "#42", "tapDrill75Dec": 0.0935, "tapDrill50": "#40", "tapDrill50Dec": 0.098, "stiTapDrill": "#27", "stiTapDrillDec": 0.144 }, { "thread": "#6-40", "series": "UNF", "tpi": 40, "pitchMm": 0.635, "basicMajor": 0.138, "basicPitch": 0.1218, "basicMinor": 0.1073, "units": "in", "tapDrill75": "#33", "tapDrill75Dec": 0.113, "tapDrill50": "#31", "tapDrill50Dec": 0.12, "stiTapDrill": "#19", "stiTapDrillDec": 0.166 }, { "thread": "#8-36", "series": "UNF", "tpi": 36, "pitchMm": 0.7056, "basicMajor": 0.164, "basicPitch": 0.146, "basicMinor": 0.1299, "units": "in", "tapDrill75": "#29", "tapDrill75Dec": 0.136, "tapDrill50": "#27", "tapDrill50Dec": 0.144, "stiTapDrill": "#13", "stiTapDrillDec": 0.185 }, { "thread": "#10-32", "series": "UNF", "tpi": 32, "pitchMm": 0.7938, "basicMajor": 0.19, "basicPitch": 0.1697, "basicMinor": 0.1517, "units": "in", "tapDrill75": "#21", "tapDrill75Dec": 0.159, "tapDrill50": "#16", "tapDrill50Dec": 0.177, "stiTapDrill": "#3", "stiTapDrillDec": 0.213 }, { "thread": "1/4-28", "series": "UNF", "tpi": 28, "pitchMm": 0.9071, "basicMajor": 0.25, "basicPitch": 0.2268, "basicMinor": 0.2062, "units": "in", "tapDrill75": "#3", "tapDrill75Dec": 0.213, "tapDrill50": "7/32\"", "tapDrill50Dec": 0.2188, "stiTapDrill": "H", "stiTapDrillDec": 0.266 }, { "thread": "5/16-24", "series": "UNF", "tpi": 24, "pitchMm": 1.0583, "basicMajor": 0.3125, "basicPitch": 0.2854, "basicMinor": 0.2614, "units": "in", "tapDrill75": "I", "tapDrill75Dec": 0.272, "tapDrill50": "J", "tapDrill50Dec": 0.277, "stiTapDrill": "S", "stiTapDrillDec": 0.348 }, { "thread": "3/8-24", "series": "UNF", "tpi": 24, "pitchMm": 1.0583, "basicMajor": 0.375, "basicPitch": 0.3479, "basicMinor": 0.3239, "units": "in", "tapDrill75": "Q", "tapDrill75Dec": 0.332, "tapDrill50": "S", "tapDrill50Dec": 0.348, "stiTapDrill": "27/64\"", "stiTapDrillDec": 0.4219 }, { "thread": "7/16-20", "series": "UNF", "tpi": 20, "pitchMm": 1.27, "basicMajor": 0.4375, "basicPitch": 0.405, "basicMinor": 0.3762, "units": "in", "tapDrill75": "W", "tapDrill75Dec": 0.386, "tapDrill50": "X", "tapDrill50Dec": 0.397, "stiTapDrill": "31/64\"", "stiTapDrillDec": 0.4844 }, { "thread": "1/2-20", "series": "UNF", "tpi": 20, "pitchMm": 1.27, "basicMajor": 0.5, "basicPitch": 0.4675, "basicMinor": 0.4387, "units": "in", "tapDrill75": "29/64\"", "tapDrill75Dec": 0.4531, "tapDrill50": "15/32\"", "tapDrill50Dec": 0.4688, "stiTapDrill": "35/64\"", "stiTapDrillDec": 0.5469 }, { "thread": "9/16-18", "series": "UNF", "tpi": 18, "pitchMm": 1.4111, "basicMajor": 0.5625, "basicPitch": 0.5264, "basicMinor": 0.4943, "units": "in", "tapDrill75": "33/64\"", "tapDrill75Dec": 0.5156, "tapDrill50": "17/32\"", "tapDrill50Dec": 0.5312, "stiTapDrill": "39/64\"", "stiTapDrillDec": 0.6094 }, { "thread": "3/4-16", "series": "UNF", "tpi": 16, "pitchMm": 1.5875, "basicMajor": 0.75, "basicPitch": 0.7094, "basicMinor": 0.6733, "units": "in", "tapDrill75": "11/16\"", "tapDrill75Dec": 0.6875, "tapDrill50": "45/64\"", "tapDrill50Dec": 0.7031, "stiTapDrill": "53/64\"", "stiTapDrillDec": 0.8281 }, { "thread": "M3×0.5", "series": "Metric", "pitchMm": 0.5, "basicMajor": 3, "basicPitch": 2.675, "basicMinor": 2.459, "units": "mm", "tapDrill75": "2.5mm", "tapDrill75Dec": 2.5, "tapDrill50": "2.6mm", "tapDrill50Dec": 2.6, "stiTapDrill": "3.4mm", "stiTapDrillDec": 3.4 }, { "thread": "M4×0.7", "series": "Metric", "pitchMm": 0.7, "basicMajor": 4, "basicPitch": 3.545, "basicMinor": 3.242, "units": "mm", "tapDrill75": "3.3mm", "tapDrill75Dec": 3.3, "tapDrill50": "3.5mm", "tapDrill50Dec": 3.5, "stiTapDrill": "4.5mm", "stiTapDrillDec": 4.5 }, { "thread": "M5×0.8", "series": "Metric", "pitchMm": 0.8, "basicMajor": 5, "basicPitch": 4.48, "basicMinor": 4.134, "units": "mm", "tapDrill75": "4.2mm", "tapDrill75Dec": 4.2, "tapDrill50": "4.4mm", "tapDrill50Dec": 4.4, "stiTapDrill": "5.6mm", "stiTapDrillDec": 5.6 }, { "thread": "M6×1.0", "series": "Metric", "pitchMm": 1, "basicMajor": 6, "basicPitch": 5.35, "basicMinor": 4.917, "units": "mm", "tapDrill75": "5.0mm", "tapDrill75Dec": 5, "tapDrill50": "5.2mm", "tapDrill50Dec": 5.2, "stiTapDrill": "6.7mm", "stiTapDrillDec": 6.7 }, { "thread": "M8×1.25", "series": "Metric", "pitchMm": 1.25, "basicMajor": 8, "basicPitch": 7.188, "basicMinor": 6.647, "units": "mm", "tapDrill75": "6.8mm", "tapDrill75Dec": 6.8, "tapDrill50": "7.1mm", "tapDrill50Dec": 7.1, "stiTapDrill": "9.0mm", "stiTapDrillDec": 9 }, { "thread": "M10×1.5", "series": "Metric", "pitchMm": 1.5, "basicMajor": 10, "basicPitch": 9.026, "basicMinor": 8.376, "units": "mm", "tapDrill75": "8.5mm", "tapDrill75Dec": 8.5, "tapDrill50": "8.8mm", "tapDrill50Dec": 8.8, "stiTapDrill": "10.7mm", "stiTapDrillDec": 10.7 }, { "thread": "M12×1.75", "series": "Metric", "pitchMm": 1.75, "basicMajor": 12, "basicPitch": 10.863, "basicMinor": 10.106, "units": "mm", "tapDrill75": "10.2mm", "tapDrill75Dec": 10.2, "tapDrill50": "10.5mm", "tapDrill50Dec": 10.5, "stiTapDrill": "12.8mm", "stiTapDrillDec": 12.8 }, { "thread": "M14×2.0", "series": "Metric", "pitchMm": 2, "basicMajor": 14, "basicPitch": 12.701, "basicMinor": 11.835, "units": "mm", "tapDrill75": "12.0mm", "tapDrill75Dec": 12, "tapDrill50": "12.5mm", "tapDrill50Dec": 12.5, "stiTapDrill": "15.0mm", "stiTapDrillDec": 15 }, { "thread": "M16×2.0", "series": "Metric", "pitchMm": 2, "basicMajor": 16, "basicPitch": 14.701, "basicMinor": 13.835, "units": "mm", "tapDrill75": "14.0mm", "tapDrill75Dec": 14, "tapDrill50": "14.5mm", "tapDrill50Dec": 14.5, "stiTapDrill": "17.0mm", "stiTapDrillDec": 17 }, { "thread": "M20×2.5", "series": "Metric", "pitchMm": 2.5, "basicMajor": 20, "basicPitch": 18.376, "basicMinor": 17.294, "units": "mm", "tapDrill75": "17.5mm", "tapDrill75Dec": 17.5, "tapDrill50": "18.0mm", "tapDrill50Dec": 18, "stiTapDrill": "21.5mm", "stiTapDrillDec": 21.5 }, { "thread": "M24×3.0", "series": "Metric", "pitchMm": 3, "basicMajor": 24, "basicPitch": 22.051, "basicMinor": 20.752, "units": "mm", "tapDrill75": "21.0mm", "tapDrill75Dec": 21, "tapDrill50": "21.5mm", "tapDrill50Dec": 21.5, "stiTapDrill": "25.5mm", "stiTapDrillDec": 25.5 } ], "drillSizes": [ { "name": "#80", "series": "number", "inch": 0.0135, "mm": 0.343 }, { "name": "#79", "series": "number", "inch": 0.0145, "mm": 0.368 }, { "name": "1/64", "series": "fraction", "inch": 0.015625, "mm": 0.397 }, { "name": "#78", "series": "number", "inch": 0.016, "mm": 0.406 }, { "name": "#77", "series": "number", "inch": 0.018, "mm": 0.457 }, { "name": "#76", "series": "number", "inch": 0.02, "mm": 0.508 }, { "name": "#75", "series": "number", "inch": 0.021, "mm": 0.533 }, { "name": "#74", "series": "number", "inch": 0.0225, "mm": 0.571 }, { "name": "#73", "series": "number", "inch": 0.024, "mm": 0.61 }, { "name": "#72", "series": "number", "inch": 0.025, "mm": 0.635 }, { "name": "#71", "series": "number", "inch": 0.026, "mm": 0.66 }, { "name": "#70", "series": "number", "inch": 0.028, "mm": 0.711 }, { "name": "#69", "series": "number", "inch": 0.0292, "mm": 0.742 }, { "name": "#68", "series": "number", "inch": 0.031, "mm": 0.787 }, { "name": "1/32", "series": "fraction", "inch": 0.03125, "mm": 0.794 }, { "name": "#67", "series": "number", "inch": 0.032, "mm": 0.813 }, { "name": "#66", "series": "number", "inch": 0.033, "mm": 0.838 }, { "name": "#65", "series": "number", "inch": 0.035, "mm": 0.889 }, { "name": "#64", "series": "number", "inch": 0.036, "mm": 0.914 }, { "name": "#63", "series": "number", "inch": 0.037, "mm": 0.94 }, { "name": "#62", "series": "number", "inch": 0.038, "mm": 0.965 }, { "name": "#61", "series": "number", "inch": 0.039, "mm": 0.991 }, { "name": "#60", "series": "number", "inch": 0.04, "mm": 1.016 }, { "name": "#59", "series": "number", "inch": 0.041, "mm": 1.041 }, { "name": "#58", "series": "number", "inch": 0.042, "mm": 1.067 }, { "name": "#57", "series": "number", "inch": 0.043, "mm": 1.092 }, { "name": "#56", "series": "number", "inch": 0.0465, "mm": 1.181 }, { "name": "3/64", "series": "fraction", "inch": 0.046875, "mm": 1.191 }, { "name": "#55", "series": "number", "inch": 0.052, "mm": 1.321 }, { "name": "#54", "series": "number", "inch": 0.055, "mm": 1.397 }, { "name": "#53", "series": "number", "inch": 0.0595, "mm": 1.511 }, { "name": "1/16", "series": "fraction", "inch": 0.0625, "mm": 1.588 }, { "name": "#52", "series": "number", "inch": 0.0635, "mm": 1.613 }, { "name": "#51", "series": "number", "inch": 0.067, "mm": 1.702 }, { "name": "#50", "series": "number", "inch": 0.07, "mm": 1.778 }, { "name": "#49", "series": "number", "inch": 0.073, "mm": 1.854 }, { "name": "#48", "series": "number", "inch": 0.076, "mm": 1.93 }, { "name": "5/64", "series": "fraction", "inch": 0.078125, "mm": 1.984 }, { "name": "#47", "series": "number", "inch": 0.0785, "mm": 1.994 }, { "name": "#46", "series": "number", "inch": 0.081, "mm": 2.057 }, { "name": "#45", "series": "number", "inch": 0.082, "mm": 2.083 }, { "name": "#44", "series": "number", "inch": 0.086, "mm": 2.184 }, { "name": "#43", "series": "number", "inch": 0.089, "mm": 2.261 }, { "name": "#42", "series": "number", "inch": 0.0935, "mm": 2.375 }, { "name": "3/32", "series": "fraction", "inch": 0.09375, "mm": 2.381 }, { "name": "#41", "series": "number", "inch": 0.096, "mm": 2.438 }, { "name": "#40", "series": "number", "inch": 0.098, "mm": 2.489 }, { "name": "#39", "series": "number", "inch": 0.0995, "mm": 2.527 }, { "name": "#38", "series": "number", "inch": 0.1015, "mm": 2.578 }, { "name": "#37", "series": "number", "inch": 0.104, "mm": 2.642 }, { "name": "#36", "series": "number", "inch": 0.1065, "mm": 2.705 }, { "name": "7/64", "series": "fraction", "inch": 0.109375, "mm": 2.778 }, { "name": "#35", "series": "number", "inch": 0.11, "mm": 2.794 }, { "name": "#34", "series": "number", "inch": 0.111, "mm": 2.819 }, { "name": "#33", "series": "number", "inch": 0.113, "mm": 2.87 }, { "name": "#32", "series": "number", "inch": 0.116, "mm": 2.946 }, { "name": "#31", "series": "number", "inch": 0.12, "mm": 3.048 }, { "name": "1/8", "series": "fraction", "inch": 0.125, "mm": 3.175 }, { "name": "#30", "series": "number", "inch": 0.1285, "mm": 3.264 }, { "name": "#29", "series": "number", "inch": 0.136, "mm": 3.454 }, { "name": "#28", "series": "number", "inch": 0.1405, "mm": 3.569 }, { "name": "9/64", "series": "fraction", "inch": 0.140625, "mm": 3.572 }, { "name": "#27", "series": "number", "inch": 0.144, "mm": 3.658 }, { "name": "#26", "series": "number", "inch": 0.147, "mm": 3.734 }, { "name": "#25", "series": "number", "inch": 0.1495, "mm": 3.797 }, { "name": "#24", "series": "number", "inch": 0.152, "mm": 3.861 }, { "name": "#23", "series": "number", "inch": 0.154, "mm": 3.912 }, { "name": "5/32", "series": "fraction", "inch": 0.15625, "mm": 3.969 }, { "name": "#22", "series": "number", "inch": 0.157, "mm": 3.988 }, { "name": "#21", "series": "number", "inch": 0.159, "mm": 4.039 }, { "name": "#20", "series": "number", "inch": 0.161, "mm": 4.089 }, { "name": "#19", "series": "number", "inch": 0.166, "mm": 4.216 }, { "name": "#18", "series": "number", "inch": 0.1695, "mm": 4.305 }, { "name": "11/64", "series": "fraction", "inch": 0.171875, "mm": 4.366 }, { "name": "#17", "series": "number", "inch": 0.173, "mm": 4.394 }, { "name": "#16", "series": "number", "inch": 0.177, "mm": 4.496 }, { "name": "#15", "series": "number", "inch": 0.18, "mm": 4.572 }, { "name": "#14", "series": "number", "inch": 0.182, "mm": 4.623 }, { "name": "#13", "series": "number", "inch": 0.185, "mm": 4.699 }, { "name": "3/16", "series": "fraction", "inch": 0.1875, "mm": 4.762 }, { "name": "#12", "series": "number", "inch": 0.189, "mm": 4.801 }, { "name": "#11", "series": "number", "inch": 0.191, "mm": 4.851 }, { "name": "#10", "series": "number", "inch": 0.1935, "mm": 4.915 }, { "name": "#9", "series": "number", "inch": 0.196, "mm": 4.978 }, { "name": "#8", "series": "number", "inch": 0.199, "mm": 5.055 }, { "name": "#7", "series": "number", "inch": 0.201, "mm": 5.105 }, { "name": "13/64", "series": "fraction", "inch": 0.203125, "mm": 5.159 }, { "name": "#6", "series": "number", "inch": 0.204, "mm": 5.182 }, { "name": "#5", "series": "number", "inch": 0.2055, "mm": 5.22 }, { "name": "#4", "series": "number", "inch": 0.209, "mm": 5.309 }, { "name": "#3", "series": "number", "inch": 0.213, "mm": 5.41 }, { "name": "7/32", "series": "fraction", "inch": 0.21875, "mm": 5.556 }, { "name": "#2", "series": "number", "inch": 0.221, "mm": 5.613 }, { "name": "#1", "series": "number", "inch": 0.228, "mm": 5.791 }, { "name": "A", "series": "letter", "inch": 0.234, "mm": 5.944 }, { "name": "15/64", "series": "fraction", "inch": 0.234375, "mm": 5.953 }, { "name": "B", "series": "letter", "inch": 0.238, "mm": 6.045 }, { "name": "C", "series": "letter", "inch": 0.242, "mm": 6.147 }, { "name": "D", "series": "letter", "inch": 0.246, "mm": 6.248 }, { "name": "1/4", "series": "fraction", "inch": 0.25, "mm": 6.35 }, { "name": "E", "series": "letter", "inch": 0.25, "mm": 6.35 }, { "name": "F", "series": "letter", "inch": 0.257, "mm": 6.528 }, { "name": "G", "series": "letter", "inch": 0.261, "mm": 6.629 }, { "name": "17/64", "series": "fraction", "inch": 0.265625, "mm": 6.747 }, { "name": "H", "series": "letter", "inch": 0.266, "mm": 6.756 }, { "name": "I", "series": "letter", "inch": 0.272, "mm": 6.909 }, { "name": "J", "series": "letter", "inch": 0.277, "mm": 7.036 }, { "name": "K", "series": "letter", "inch": 0.281, "mm": 7.137 }, { "name": "9/32", "series": "fraction", "inch": 0.28125, "mm": 7.144 }, { "name": "L", "series": "letter", "inch": 0.29, "mm": 7.366 }, { "name": "M", "series": "letter", "inch": 0.295, "mm": 7.493 }, { "name": "19/64", "series": "fraction", "inch": 0.296875, "mm": 7.541 }, { "name": "N", "series": "letter", "inch": 0.302, "mm": 7.671 }, { "name": "5/16", "series": "fraction", "inch": 0.3125, "mm": 7.938 }, { "name": "O", "series": "letter", "inch": 0.316, "mm": 8.026 }, { "name": "P", "series": "letter", "inch": 0.323, "mm": 8.204 }, { "name": "21/64", "series": "fraction", "inch": 0.328125, "mm": 8.334 }, { "name": "Q", "series": "letter", "inch": 0.332, "mm": 8.433 }, { "name": "R", "series": "letter", "inch": 0.339, "mm": 8.611 }, { "name": "11/32", "series": "fraction", "inch": 0.34375, "mm": 8.731 }, { "name": "S", "series": "letter", "inch": 0.348, "mm": 8.839 }, { "name": "T", "series": "letter", "inch": 0.358, "mm": 9.093 }, { "name": "23/64", "series": "fraction", "inch": 0.359375, "mm": 9.128 }, { "name": "U", "series": "letter", "inch": 0.368, "mm": 9.347 }, { "name": "3/8", "series": "fraction", "inch": 0.375, "mm": 9.525 }, { "name": "V", "series": "letter", "inch": 0.377, "mm": 9.576 }, { "name": "W", "series": "letter", "inch": 0.386, "mm": 9.804 }, { "name": "25/64", "series": "fraction", "inch": 0.390625, "mm": 9.922 }, { "name": "X", "series": "letter", "inch": 0.397, "mm": 10.084 }, { "name": "Y", "series": "letter", "inch": 0.404, "mm": 10.262 }, { "name": "13/32", "series": "fraction", "inch": 0.40625, "mm": 10.319 }, { "name": "Z", "series": "letter", "inch": 0.413, "mm": 10.49 }, { "name": "27/64", "series": "fraction", "inch": 0.421875, "mm": 10.716 }, { "name": "7/16", "series": "fraction", "inch": 0.4375, "mm": 11.112 }, { "name": "29/64", "series": "fraction", "inch": 0.453125, "mm": 11.509 }, { "name": "15/32", "series": "fraction", "inch": 0.46875, "mm": 11.906 }, { "name": "31/64", "series": "fraction", "inch": 0.484375, "mm": 12.303 }, { "name": "1/2", "series": "fraction", "inch": 0.5, "mm": 12.7 }, { "name": "33/64", "series": "fraction", "inch": 0.515625, "mm": 13.097 }, { "name": "17/32", "series": "fraction", "inch": 0.53125, "mm": 13.494 }, { "name": "35/64", "series": "fraction", "inch": 0.546875, "mm": 13.891 }, { "name": "9/16", "series": "fraction", "inch": 0.5625, "mm": 14.288 }, { "name": "37/64", "series": "fraction", "inch": 0.578125, "mm": 14.684 }, { "name": "19/32", "series": "fraction", "inch": 0.59375, "mm": 15.081 }, { "name": "39/64", "series": "fraction", "inch": 0.609375, "mm": 15.478 }, { "name": "5/8", "series": "fraction", "inch": 0.625, "mm": 15.875 }, { "name": "41/64", "series": "fraction", "inch": 0.640625, "mm": 16.272 }, { "name": "21/32", "series": "fraction", "inch": 0.65625, "mm": 16.669 }, { "name": "43/64", "series": "fraction", "inch": 0.671875, "mm": 17.066 }, { "name": "11/16", "series": "fraction", "inch": 0.6875, "mm": 17.463 }, { "name": "45/64", "series": "fraction", "inch": 0.703125, "mm": 17.859 }, { "name": "23/32", "series": "fraction", "inch": 0.71875, "mm": 18.256 }, { "name": "47/64", "series": "fraction", "inch": 0.734375, "mm": 18.653 }, { "name": "3/4", "series": "fraction", "inch": 0.75, "mm": 19.05 }, { "name": "49/64", "series": "fraction", "inch": 0.765625, "mm": 19.447 }, { "name": "25/32", "series": "fraction", "inch": 0.78125, "mm": 19.844 }, { "name": "51/64", "series": "fraction", "inch": 0.796875, "mm": 20.241 }, { "name": "13/16", "series": "fraction", "inch": 0.8125, "mm": 20.638 }, { "name": "53/64", "series": "fraction", "inch": 0.828125, "mm": 21.034 }, { "name": "27/32", "series": "fraction", "inch": 0.84375, "mm": 21.431 }, { "name": "55/64", "series": "fraction", "inch": 0.859375, "mm": 21.828 }, { "name": "7/8", "series": "fraction", "inch": 0.875, "mm": 22.225 }, { "name": "57/64", "series": "fraction", "inch": 0.890625, "mm": 22.622 }, { "name": "29/32", "series": "fraction", "inch": 0.90625, "mm": 23.019 }, { "name": "59/64", "series": "fraction", "inch": 0.921875, "mm": 23.416 }, { "name": "15/16", "series": "fraction", "inch": 0.9375, "mm": 23.813 }, { "name": "61/64", "series": "fraction", "inch": 0.953125, "mm": 24.209 }, { "name": "31/32", "series": "fraction", "inch": 0.96875, "mm": 24.606 }, { "name": "63/64", "series": "fraction", "inch": 0.984375, "mm": 25.003 }, { "name": "1", "series": "fraction", "inch": 1, "mm": 25.4 } ], "npt": [ { "size": "1/16", "tpi": 27, "pipeOd": 0.3125, "tapDrill": "D", "tapDrillInch": 0.246 }, { "size": "1/8", "tpi": 27, "pipeOd": 0.405, "tapDrill": "R", "tapDrillInch": 0.339 }, { "size": "1/4", "tpi": 18, "pipeOd": 0.54, "tapDrill": "7/16", "tapDrillInch": 0.4375 }, { "size": "3/8", "tpi": 18, "pipeOd": 0.675, "tapDrill": "37/64", "tapDrillInch": 0.5781 }, { "size": "1/2", "tpi": 14, "pipeOd": 0.84, "tapDrill": "23/32", "tapDrillInch": 0.7188 }, { "size": "3/4", "tpi": 14, "pipeOd": 1.05, "tapDrill": "59/64", "tapDrillInch": 0.9219 }, { "size": "1", "tpi": 11.5, "pipeOd": 1.315, "tapDrill": "1-5/32", "tapDrillInch": 1.1563 }, { "size": "1-1/4", "tpi": 11.5, "pipeOd": 1.66, "tapDrill": "1-1/2", "tapDrillInch": 1.5 }, { "size": "1-1/2", "tpi": 11.5, "pipeOd": 1.9, "tapDrill": "1-47/64", "tapDrillInch": 1.7344 }, { "size": "2", "tpi": 11.5, "pipeOd": 2.375, "tapDrill": "2-7/32", "tapDrillInch": 2.2188 } ], "cuttingSpeeds": [ { "id": "6061", "material": "6061-T6 aluminum", "group": "N · Nonferrous", "condition": "T6", "hardnessHB": [ 80, 110 ], "note": "Use sharp, polished edges and reliable chip evacuation.", "millingHssSfm": [ 165, 165 ], "millingCarbideSfm": [ 500, 1000 ], "turningHssSfm": [ 500, 600 ], "turningCarbideSfm": [ 600, 1200 ], "chipLoadIpt": [ 0.002, 0.006 ] }, { "id": "7075", "material": "7075-T6 aluminum", "group": "N · Nonferrous", "condition": "T6", "hardnessHB": [ 135, 175 ], "note": "Higher strength than 6061; monitor chip adhesion.", "millingHssSfm": [ 165, 165 ], "millingCarbideSfm": [ 400, 800 ], "turningHssSfm": [ 500, 600 ], "turningCarbideSfm": [ 500, 1000 ], "chipLoadIpt": [ 0.002, 0.005 ] }, { "id": "1018", "material": "1018 low-carbon steel", "group": "P · Steel", "condition": "As supplied / normalized", "hardnessHB": [ 110, 180 ], "note": "Low-carbon steel can form a built-up edge.", "millingHssSfm": [ 65, 110 ], "millingCarbideSfm": [ 200, 400 ], "turningHssSfm": [ 125, 215 ], "turningCarbideSfm": [ 250, 500 ], "chipLoadIpt": [ 0.0015, 0.004 ] }, { "id": "1045", "material": "1045 medium-carbon steel", "group": "P · Steel", "condition": "Normalized", "hardnessHB": [ 160, 230 ], "note": "Heat treatment changes cutting behavior substantially.", "millingHssSfm": [ 25, 100 ], "millingCarbideSfm": [ 150, 300 ], "turningHssSfm": [ 55, 180 ], "turningCarbideSfm": [ 200, 400 ], "chipLoadIpt": [ 0.0015, 0.004 ] }, { "id": "4140", "material": "4140 alloy steel", "group": "P · Steel", "condition": "Annealed", "hardnessHB": [ 170, 240 ], "note": "Reference family includes resulfurized grades; ordinary 4140 may cut less freely. Verify tooling data.", "millingHssSfm": [ 35, 100 ], "millingCarbideSfm": [ 120, 250 ], "turningHssSfm": [ 70, 200 ], "turningCarbideSfm": [ 180, 350 ], "chipLoadIpt": [ 0.0015, 0.0035 ] }, { "id": "4140-qt", "material": "4140 alloy steel · prehardened", "group": "P · Steel", "condition": "Quenched & tempered", "hardnessHB": [ 260, 340 ], "note": "Condition-specific speeds are estimates; carbide is preferred. Check actual hardness on the material certificate.", "millingHssSfm": [ 20, 40 ], "millingCarbideSfm": [ 80, 160 ], "turningHssSfm": [ 30, 60 ], "turningCarbideSfm": [ 100, 220 ], "chipLoadIpt": [ 0.001, 0.003 ] }, { "id": "304", "material": "304 stainless steel", "group": "M · Stainless", "condition": "Annealed", "hardnessHB": [ 140, 210 ], "note": "Work-hardens; avoid dwelling or rubbing. Maintain a positive cut.", "millingHssSfm": [ 70, 75 ], "millingCarbideSfm": [ 80, 160 ], "turningHssSfm": [ 115, 135 ], "turningCarbideSfm": [ 100, 250 ], "chipLoadIpt": [ 0.001, 0.003 ] }, { "id": "316", "material": "316 stainless steel", "group": "M · Stainless", "condition": "Annealed", "hardnessHB": [ 145, 215 ], "note": "Grade-specific speeds are estimates. Tough chips and work hardening demand consistent engagement.", "millingHssSfm": [ 40, 60 ], "millingCarbideSfm": [ 60, 140 ], "turningHssSfm": [ 60, 100 ], "turningCarbideSfm": [ 80, 200 ], "chipLoadIpt": [ 0.001, 0.003 ] }, { "id": "a2", "material": "A2 tool steel", "group": "P · Steel", "condition": "Annealed only", "hardnessHB": [ 180, 240 ], "note": "Not suitable for hardened A2. Hardened tooling requires supplier-specific data.", "millingHssSfm": [ 40, 50 ], "millingCarbideSfm": [ 80, 160 ], "turningHssSfm": [ 80, 125 ], "turningCarbideSfm": [ 120, 250 ], "chipLoadIpt": [ 0.001, 0.003 ] }, { "id": "gray-iron", "material": "Gray cast iron · Class 30", "group": "K · Cast iron", "condition": "As cast", "hardnessHB": [ 160, 240 ], "note": "Abrasive material; control dust. Dry-cut adjustment is not applied to cast iron.", "millingHssSfm": [ 70, 100 ], "millingCarbideSfm": [ 150, 300 ], "turningHssSfm": [ 145, 215 ], "turningCarbideSfm": [ 150, 300 ], "chipLoadIpt": [ 0.002, 0.005 ] }, { "id": "c360", "material": "C360 free-cutting brass", "group": "N · Nonferrous", "condition": "Half-hard", "hardnessHB": [ 80, 150 ], "note": "Use brass-compatible geometry; aggressive rake can grab.", "millingHssSfm": [ 100, 200 ], "millingCarbideSfm": [ 250, 500 ], "turningHssSfm": [ 300, 350 ], "turningCarbideSfm": [ 400, 600 ], "chipLoadIpt": [ 0.002, 0.005 ] } ] }