Theoretical Machinist |

Website news |

Forums |

Sitemap |

Calculators |

Imperial and Metric Tap drill size calculators |

Find hole size or thread percentage for cutting taps and cold forming taps in both imperial and metric sizes |

Unified imperial screw thread calculator |

Calculate Major, minor and pitch diameters of Unified national external and internal thread form |

Bolt hole circle pattern calculator |

Convert Decimal degrees to and from sexageimal: degrees, minutes, seconds |

ISO Metric Tolerance Zone Calculator |

Determine and calculate ISO tolerance zone deviation for metric fits |

ISO Metric Tolerance Builder |

Free ISO Metric Tolerance Zone calculator. Evaluate any tolerance quickly and easily |

RPM and Feed |

Calculate RPM using SFM and Diameter of Tool/Stock |

Calculate SFM using RPM and Diameter of Tool/Stock |

Calculate IPM using RPM, Chip load and number of cutting edges |

Calculate Chip load using RPM, IPM and number of cutting edges |

Calculate Material removal rate using IPM, depth of cut and width of cut |

Surface finish |

Calculate scallop height using tool diameter and step over distance |

Calculate step over distance using tool diameter and scallop height |

Calculate tool diameter using scallop height and step over distance |

Calculate scallop height using tool tip radius and step over distance |

Calculate step over distance using tool tip radius and scallop height |

Calculate tool tip radius using scallop height and step over distance |

4th axis calculators |

Convert degrees per minutes to inch per minute |

Convert inch per minutes to degrees per minute |

Calculate position from center using degrees per minute and feed per minute |

Unit convert |

Convert inches(in) to and from millimeters(mm) |

Convert inches(in) to and from centmeters(cm) |

Convert feets(ft) to and from meters(m) |

Convert ounces(oz) to and from grams(g) |

Convert pounds(lb to and from grams(g) |

Convert pounds(lb) to and from kilograms(kg) |

Convert US ton(short ton) to and from kilograms(kg) |

Convert US ton(short ton) to and from Metric ton(t) |

Convert UK ton(long ton) to and from kilograms(kg) |

Convert UK ton(long ton) to and from Metric ton(t) |

Convert Decimal angle to and from Sexagesimal angle; degrees, minutes, seconds |

Smartphone Apps |

TheoreticalMachinist Charts |

Windows Apps |

TheoreticalMachinist Chart |

TheoreticalMachinist Checksum Generator |

Charts |

Decimal equivalents |

Suface finish/texture/roughness |

Tap drill size; Common tap drill sizes |

Tap drill size; Thread percentages |

Common threads |

Fractions convert |

Imperial National Pipe Thread tap drill size |

British and ISO Pipe thread tap drill size |

Site info |

About the author |

Help |

Legal disclaimer |

Privacy policy |

Deprecated |

these pages will eventually be removed |

Tap drill size calculators |

Imperial inch Tap drill size calculators |

Calculate cutting tap drill size using outside diameter, threads per inch and thread percentage |

Calculate cold forming tap drill size using outside diameter, threads per inch and thread percentage |

Calculate thread percentage of cutting using outside diameter, threads per inch and tap drill size |

Calculate thread percentage of cold forming tap using outside diameter, threads per inch and tap drill size |

Metric Tap drill size calculators |

Calculate cutting tap drill size using outside diameter, threads per inch and thread percentage |

Calculate cold forming tap drill size using outside diameter, threads per inch and thread percentage |

Calculate thread percentage of cutting using outside diameter, threads per inch and tap drill size |

Calculate thread percentage of cold forming tap using outside diameter, threads per inch and tap drill size |

Updated: 27 June 2013

Follow @TheoreticalMach
!function (d, s, id) { var js, fjs = d.getElementsByTagName(s)[0], p = /^http:/.test(d.location) ? 'http' : 'https'; if (!d.getElementById(id)) { js = d.createElement(s); js.id = id; js.src = p + '://platform.twitter.com/widgets.js'; fjs.parentNode.insertBefore(js, fjs); } }(document, 'script', 'twitter-wjs');

Tweet
!function (d, s, id) { var js, fjs = d.getElementsByTagName(s)[0], p = /^http:/.test(d.location) ? 'http' : 'https'; if (!d.getElementById(id)) { js = d.createElement(s); js.id = id; js.src = p + '://platform.twitter.com/widgets.js'; fjs.parentNode.insertBefore(js, fjs); } }(document, 'script', 'twitter-wjs');