Machining reference charts
10 searchable tables and a calculator in this category.
Machining
Fraction ↔ Decimal ↔ mm
Type 3/8, 0.375 or 9.525 — the other fields follow, with the 1/64 rounding shown.
MachiningDrill Bit Size Chart
Number, letter and fractional bits with decimal and mm equivalents.
MachiningTap Drill Size Chart
Recommended drill for 75% and 50% thread engagement.
MachiningThread Size Chart
UNC, UNF and metric thread pitch and diameter reference.
MachiningMetric Thread Stress Area
Tensile stress area for coarse and fine metric threads, M3 to M39.
MachiningPipe Size Chart (Sch 40)
Nominal pipe size, outside diameter and wall thickness.
MachiningAN Fitting Size Chart
AN dash numbers to tube outside diameter.
MachiningBearing Bore Size Chart
Bore diameters for 6000, 6200 and 6300 series bearings.
MachiningHardness Conversion (HB/HRC/HV)
Brinell, Vickers and Rockwell equivalents with tensile strength.
MachiningSurface Roughness (Ra, N-grade)
Ra, Rz, RMS and ISO N-grades with the process that produces each.
MachiningMusic Wire Size Chart
ASTM A228 spring wire diameters with tensile strength ranges.