On-Edge Triangle Inserts

On-Edge Triangle Inserts Identification System

1
STYLE
T - Triangle

2
TOP RAKE
N - Neutral
P - 5" Positive

3
TOLERANCE
M ± .001

4
TYPE
A - With hole
B - Hole w/single countersink
C - Hole w/ double countersink

5
SIZE
Number of 1/8ths of the "IC" or inscribed circle

6
THICKNESS
Number of 1/16ths of an inch thick

7
INSERT FORM
NV - 60° "V" Thread
NT - 29° Acme Thread
NGC - Groover Central
NGC - Groover Right Hand
NGL - Groover Left Hand

8
INSERT FORM
API Threading - (example: 428) If there are three numerical digits, the first is the pitch, the second is the taper per foot and the third is the last digit of the root radius. For API thread forms and charts: see pages 56 & 58 in Carbide Grinding Catalog.

9
NOSE WIDTHS
W - Nose width of grooving insert in decimal form.

Standard Widths
.031	.187
.062	.250
.093	.312
.125	.375
.156

OR
THREAD PITCHES
P - One or two numbers preceed "P" to designate thread pitch.

Standard Acme and Stube Acme Pitches: 2P - 16 P

Standard NT pitches and widths: see page 58 in the catalog.

Standard NV pitches and widths: see page 54 in the catalog.

10
CORNER RADII or NOSE RADIUS
(optional)
R - Denotes corner radii or nose radius in decimal form.

Standard Radii
.010R	.025R
.015R	.030R
.020R	.038R

FNR (Full Nose Radius)

11
ADDITIONAL INFO
INT - Internal
EXT - External
M - Multiple Tooth
RH - Right Hand
LH - Left Hand
TPF - Taper per Foot