Page 1696 - Master Catalog 2017, Inch

High-Performance Taps
Grades and Grade Descriptions

P Steel
Coatings are designed for
M Stainless Steel
optimized tapping performance
K Cast Iron
in specific materials.

N Non-Ferrous
S High-Temp Alloys
H Hardened Materials

wear
resistance toughness
Coating Grade Description 05 10 15 20 25 30 35 40 45

WS32MG Coated HSS-E-PM, PVD heat- and wear-resistant high-vanadium cobalt powder metal
HSS substrate with high-hardness TiCN coating. Use when tapping heat-treated steel
44–55 HRC and cobalt- or nickel-based heat-resistant alloys.
S
H

WN35MG Coated HSS-E-PM, PVD powder metal HSS-E substrate with two-layer coating.
TiN base layer and DLC top layer that resists galling of non-ferrous materials
to the tap. Use for tapping titanium. Not recommended for steel.
S

Grade WN38MG Coated HSS-E-PM, PVD powder metal HSS-E substrate with DLC coating. Use for N
form tapping aluminum. Not recommended for steel.

WN44EG High vanadium HSS-E substrate with a coating consists of low friction N
CrC/C over wear-resistant TiN base layer. Use for tapping stainless steel
and non-ferrous materials.

P
M
WP42EG Coated HSS-E substrate with TiCN PVD layer. Use in multiple applications, including K
steel, stainless steel, ductile cast iron, and cast aluminum. WP42EG is more abrasion-
N
resistant than WU41EG.

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