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Y<br />
1/4P Internal<br />
60°<br />
h<br />
1/8P External<br />
L<br />
IC<br />
Y<br />
X<br />
T<br />
L<br />
X<br />
IC<br />
Y<br />
Y<br />
X<br />
IC<br />
L<br />
IC<br />
X<br />
L<br />
Boring<br />
Holders<br />
<strong>Thread</strong>ing<br />
Inserts<br />
American UN (con’t)<br />
Internal<br />
<strong>Thread</strong>ing<br />
Holders<br />
Defined by: ANSI B1.1:74<br />
Tolerance class: 2A/2B<br />
U Style<br />
1/2”U<br />
5/8”U<br />
U Style<br />
V Style<br />
Z Style<br />
Insert Size Pitch Ordering Code<br />
Dimensions mm Anvil<br />
M Style<br />
IC L mm tpi<br />
RH+LH<br />
h min X Y RH LH Toolholder<br />
22<br />
27<br />
4.5<br />
4<br />
3<br />
4UI4.5UN...<br />
4UI4UN...<br />
5UI3UN...<br />
3.26<br />
3.67<br />
4.89<br />
2.4<br />
2.4<br />
2.7<br />
11.0<br />
11.0<br />
13.7<br />
YI4U<br />
YI5U<br />
YE4U<br />
YE5U<br />
AVR..-4U (LH)<br />
AVR..-5U (LH)<br />
<strong>Thread</strong>ing<br />
Technical Data<br />
Grooving<br />
Inserts<br />
V Style<br />
Insert Size Pitch Ordering Code<br />
Dimensions mm<br />
IC L mm tpi<br />
RH<br />
LH<br />
h min X Y T Toolholder<br />
4 5VIR4UN... 5VIL4UN... 3.67 1.0 3.3 6<br />
5/8”V 27<br />
NVR..-5V (LH)<br />
3 5VIR3UN... 5VIL3UN... 4.89 1.0 4.3 8<br />
Grooving<br />
Holders<br />
Z Style<br />
M Style<br />
Insert Size Pitch Teeth Ordering Code<br />
Dimensions mm<br />
Anvil<br />
IC L mm tpi<br />
RH<br />
h min<br />
X<br />
Y<br />
RH Toolholder<br />
1/2” 22 8 2 4IR8UN2Z... 1.83 3.5 9.6 YI4Z AVR..-4Z<br />
Insert Size Pitch Teeth Ordering Code<br />
Dimensions mm<br />
Anvil<br />
IC L mm tpi<br />
RH<br />
h min<br />
X<br />
Y<br />
RH Toolholder<br />
3/8” 16 16 2 3IR16UN2M... 0.92<br />
1.7<br />
2.4<br />
YI3M AVR..-3<br />
16 3 4IR16UN3M... 0.92<br />
2.5<br />
4.0<br />
1/2” 22 12 2 4IR12UN2M... 1.22<br />
2.1<br />
3.2<br />
YI4M AVR..-4<br />
12 3 4IR12UN3M... 1.22<br />
3.3<br />
5.2<br />
5/8” 27 8 2 5IR8UN2M... 1.83<br />
3.0<br />
4.8<br />
YI5M AVR..-5M<br />
Grooving<br />
Technical Data<br />
Boring<br />
Inserts<br />
42<br />
Boring<br />
Technical Data
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