Page 38 - HOLE MAKING CATALOG p311-382

TAPS USER GUIDE

Tap Designation Code Key

TPG UNC 1/4-20 M HE Ti

Tap Style D- TPI B - Bore Coating
D- Pitch for Coolant Types*
TPH - Hand Tap Ni - Nitriding
TPF - Forming Tap (on request) Ti - TiN
TPG - Gun Point TC - TiCN
TPS - Spiral Flute TA - TiAlN
TPST - Straight Flute St - Black Oxide

* On request

Thread Standard Tap Color Codes(1) Tap Materials
M - Multi-Material Application HS - H.S.S. (M2)
M - ISO Metric
Coars Thread W - Steel with Good Machinability HE - H.S.S- E 5% Co.
DIN-13 Rm<750 N/mm2 HSS (M35)

MF - ISO Metric S - Stainless Steel PM - Compacted Powder
Fine Thread
DIN-13 H - Hardened Steel and High Temp./ HM - Solid Carbide
Super Alloys Rm>750 N/mm2
UNF - Unfied Fine
Thread G - Grey Cast Iron

UNC - Unfied Coarse N - Low Alloy Steel Rm<600 N/mm2
Thread
A - Aluminum and Aluminum Alloys

F - Any Material with at least
8~10% Elongation

(1) The tools have a matching colored
ring around the shank

Chamfer Lead According to DIN2197 (specified for each tool family)
A Form A (Chamfer Lead 5-6 Threads)
B Form B (with Gun-Nose and Chamfer Lead 4-5 Threads)
C Form C (Chamfer Lead 2-3 Threads)
D Form D (Chamfer Lead 4-5 Threads)
E Form E (Chamfer Lead 1.5-2 Threads)

348 ISCAR