Complete reference of tap and thread terminology including bottoming tap, plug tap, taper tap, chamfer, flute, pitch diameter, major diameter, and thread geometry.
Resources
Taylor Tool high speed steel material chart and specifications
High speed steel grades used in Taylor Tool cutting tools: HSS M2, HSCO M35, HSS-E M3, and M42 HSS-E with alloying elements, applications, and international equivalents.
UNC/UNF and Metric Thread Classes of Fit and Pitch Diameter Limits
Reference for UNC/UNF thread classes 1B, 2B, 3B and metric 4H, 6H classes of fit with H-limits and D-limits for tap pitch diameter tolerances.
Tap troubleshooting guide: causes and solutions
Troubleshooting guide for tapping problems: thread size errors, axial miscut, poor surface finish, insufficient tool life, and tap breakage. Causes and solutions.
Standard pipe tap dimensions (USCTI Table 311)
USCTI Table 311 dimensions for standard pipe taps, straight and taper ground thread, 1/16 to 4 inch nominal sizes. Includes overall length, thread length, shank diameter and tolerances.
Pulley tap dimensions, ground thread (MCTI Table 310)
Complete pulley tap dimensions for ground thread taps, 1/4 to 3/4 inch fractional sizes. Includes overall length, thread length, shank diameter, square dimensions and tolerances per MCTI Table 310.
Special fine pitch taps, short series (USCTI Table 303)
USCTI Table 303 dimensions for special fine pitch taps, short series, ground thread. Covers 1.010 to 4.010 inch diameter taps with 14+ TPI or 1.75mm pitch and finer.
Standard tap dimensions (USCTI Table 302)
USCTI Table 302 standard tap dimensions for ground thread taps from 0.052 to 4.010 inches, including overall length, thread length, shank diameter, and tolerances.
Tapping speeds and RPM for imperial and metric taps
RPM conversion table for UNC, UNF, NPT, NPTF and metric taps at surface speeds from 5 to 150 SFM. Covers sizes 0 through 2 inch and M1 through M30.
Tap recommendations for Unified and American National screw threads
Tap ground-thread limit recommendations (GH1 through GH8) and pitch diameter limits for Class 2, 3, 2B, and 3B threads in UNC, UNF, and UNS sizes from 0-80 to 1 1/2-12.