Workshop Reference Charts

Quick reference tables for the workshop — tap drill sizes, torque conversions, drill bit charts, bolt grades and machining speeds. Use as a guide; verify critical values before use.

Tap Drill Chart Metric coarse, UNC, and UNF tap drill sizes with pitch and diameter. Find the correct drill before tapping. View chart → Nm to lb-ft Converter Live torque unit converter plus a common fastener torque reference table for workshop use. Open converter → Fraction to Decimal Chart Complete 1/64 through 63/64 fractions with decimal inch and millimetre equivalents. View chart → Drill Bit Size Chart Number (#1–#80), letter (A–Z), and metric drill sizes with decimal inch and mm equivalents. View chart → Bolt Grade Chart Metric and SAE bolt grades with tensile strength, proof load and head markings. View chart → Feeds & Speeds Reference HSS cutting speed table by material and RPM formula for turning and milling operations. View reference →

Torque Toolbox for Android includes guided calculators, saved setups, offline references, and workshop utility tools in one app.

Get it on Google Play