UNDERSTANDING GWS NOMENCLATURE

Part numbers are composed of letters and numerals referring to different categories (where applicable), as seen in the following examples.

SERIES

PITCH

LOC

SHANK

#FLUTE

CUTTING DIA.*

COATING

A G W

(30 DEGREE HELIX)

(NON-FERROUS)

S

(STUB)

4

(4)

0 5 0 0

(1/2 INCH)

A G S

(30 DEGREE HELIX)

(COBB STYLE)

S

(STUB)

3

(3)

1 0 0 0

(1 INCH)

G W

(30 DEGREE HELIX)

(GENERAL PURPOSE)

XL

(X-TRA LONG)

2

(2)

0 7 5 0

(3/4 INCH)

B N A

(37 DEGREE HELIX)

(BALL NOSE)

L

(LONG)

S U

(UNDERCUT)

3

(3)

0 6 2 5

(5/8 INCH)

S G W

(VARIABLE HELIX)

L

(LONG)

S U

4

(4)

0 2 5 0

(1/4 INCH)

-X

(VARIOUS)

G S C

(20 DEGREE HELIX)

(HOGMILL-ROUGHER)

M

(MEDIUM)

L

(LONG)

S U

4

(4)

0 3 7 5

(3/8 INCH)

*Note: In most cases, the listed cutting diameter will be equal to the corresponding shank diameter, although there will be some exceptions.