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Technical Information for XN Type Threading Technical Information forXN Type Threading

The following charts list the largest thread pitch Metric - sized 60 ° V- Threading Limits
60 ° V - Thread Crest Turning Application Data Controlled Root Radius Specifications for UNJ
that can be applied on internal applications using internal threading limitations
Threads
Top Notch threading inserts for 60 ° V- threading NT- 1 , NT- 2 60 ° V- threading inserts
and Acme threading . nominal thread size
minimum thread insert nose radius thread radius
TPI diameter ( mm ) catalogue number on insert per MIL - S - 8879 A
XNT- 1 XNT- 2 XNT- 1 XNT- 2 XN J - 3020 R / L 8
0 , 477 / 0 , 502 0 , 477 / 0 ,574
XNJP - 3020 R / L 8
4.00 M 48 x 4.00 43.67
XNJ - 3014 R / L 12
0 , 317 / 0 , 342 0 , 317 / 0 ,381
3.00 M 42 x 3.00 38.75 XNJP - 3014 R / L 12
minimum minor diameter nominal thread size 2.50 M 39 x 2.50 M 24 x 2.50 36.29 21.29 feed direction feed direction
XNJ - 3010 R / L 16
( minimum bore) (maximum diameter) 0 , 238 / 0, 264 0 , 238 / 0 , 287
XNJP - 3010 R / L 16
2.00 M 33 x 2.00 M 15 X 2.00 30.84 12.84
1.75 M 32 x 1.75 M 15 X 1.75 30.11 13.11 XNJF - 3012R / L 14
NTC crest turning insert for 11 0 , 271 / 0 , 297 0 , 271 / 0 ,327
XNTC crest turning insert for 12 XNJK - 3012 R / L 14
1.50 M 32 x 1.50 M 15 x 1.50 30.38 13.38 threads
threads XN JF - 3010 R / L 16
per inch and coarser ( P > 3 mm) 0 , 238 / 0 , 264 0 , 238 / 0 , 287
1.25 M 29 x 1.25 M 14 x 1.25 27.65 12.65 per inch and finer ( P < 2 mm ) XNJK - 3010 R / L 16
1.00 * M 27 x 1.00 M 14 X 1.00 25.92 12.92 XN JF - 3009 R / L 18
0 , 210 / 0, 236 0 , 210 / 0 , 254
XNJK - 3009 R / L 18
Inch - Sized 60 ° V- Threading Limits 0.75 M 22 x 0.75 M 12 x 0.75 21.19 11.19
“ J ” thread note for catalogue XN JF - 3008 R / L 20
0 , 190 / 0 , 215 0 , 190 / 0 , 228
internal threading limitations * Thread pitch of 1 mm and less can be cut with an XNT- 2 insert XNJK - 3008 R / L 20
provided the core thread diameter is 25 mmorlarger ( 11 mmorlarger The controlled root radius thread form ( SAE 8879 C ) is defined for the
XNT- 1 , XNT- 2 V- threading inserts with XNT- 1 ).
XN JF - 3007 R / L 24
XNJK - 3007 R / L 24
0 , 160 / 0, 185 0 , 160 / 0 , 190
external thread only. To machine the corresponding internal thread ,
minimum minor
choose any insert that will cut a unified class 2 B thread , then bore the XN JF - 3006 R / L 28
nominal thread size minor diameter to size. Refer to SAE 8879C and MIL - S - 8879 C and 0 , 137 / 0,162 0 , 137 / 0 , 162
diameter ( inch ) XNJK - 3006 R / L 28
TPI internal threading limitations SAEAS 8879 D for the correct “ J ” thread minor diameter values .
XN JF - 3005 R / L 32
XNT- 1 XNT- 2 XNT- 1 XNT- 2 NT- 3 , NT- 4 60 ° V- threading inserts XNJK - 3005 R / L 32
0 , 119 / 0, 142 0 , 119 / 0 , 142
6 1 -7/ 8 1.695
minimum thread
7 1 - 3/ 4 1.595 TPI nominal thread size NOTE : NTC inserts automatically control root to crest dimensions.
diameter ( mm )
Therefore , in setting up threading operations with NTC inserts ,check
8 1 -5/ 8 1.490
6.00 ** M 76 x 6.00 69.50 the O . D . or I .D . at the thread crest for correct dimensions.
9 1- 9 / 16 1.442
5.50 * * M 73 x 5.50 67.05
10 1 - 1 /2 15 / 16 1.392 0.830
5.00 M 70 x 5.00 64.59
11 1- 7 / 16 15 / 16 1.339 0.830
4.00 M 64 x 4.00 59.67
11- 1 / 2 1 - 3/ 8 15 / 16 1.281 0.830
3.00 M 52 x 3.00 48.75
12 1 - 3/ 8 9 / 16 1.285 0.472
2.50 M 48 x 2.50 45.29
13 1- 5 / 16 9 / 16 1.229 0.472
061 2.00 M 42 x 2.00 39.84 062
14 1-1/4 9 / 16 1.173 0.472
1.75 M 40 x 1.75 38.11
16
18
1-1/4
1 -1 / 8
9 / 16
9 / 16
1.182
1.065
0.472
0.472
1.50 * M 38 x 1.50 36.38 60 ° V- Thread Application Data
20 1- 1 / 8 1/2 1.071 0.440
* Thread pitch of 1,5 mm and less can be cut provided core thread
diameter is 35 mm or larger. recommended TP * recommended TPI *
24 * / 1- 1 / 16 11 2 1.017 0.440 Insert Description insert D * ( mm ) E * ( mm )
external intertnal external intertnal
* Twenty - four threads per inch and finer can be cut with an XNT- 2 Acme Threading Limits E XNT- 1 1.90 1.11 1.00 - 2.00 24 - 12
insert provided the minor diameter is 25 mm or larger ( 11 , 18 mm or internal threading limitations
larger with XNT-1 ) . XNAand XNAS - 2 , - 3 , - 4 , and - 6 Acme XNT- 2 28.70 1.90 0.70 - 3.00 1.25 - 3.50 36 - 8 20 - 7
threading inserts radius
J XNTF - 2 15.75 1.01 0.60 -1.75 1.00 - 2.00 44 - 14 24 - 12
internal threading limitations minimum thread D
XNTK - 2 15.75 1.01 0.60 -1.75 1.00 - 2.00 44 - 14 24 - 12
XNT- 3 , XNT- 4 V- threading inserts TPI nominal thread size diameter
NT-
NTP- XNTP - 2 28.70 1.90 0.70 - 3.00 1.25 - 3.50 36 - 8 20 - 7
XNT- 1 XNT- 2
minimum minor NT-K
TPI nominal thread size NT- C
diameter ( inch ) 2* 5 4.500 114.30 XNT- 3 37.59 2.46 1.25 - 4.00 2.00 - 5.00 20 - 6 12 - 5
4 ** 3 2.792 2 - 1 /2 * 4 -1 1 2 4.100 104.10 feed direction XNTF - 3 21.08 1.37 0.60 -2.50 1.00 - 2.50 44 - 10 24 - 9
4 - 1 / 2 ** 2 -7/ 8 2.634 3 ** 4 3.665 93.10
XNTK - 3 21.08 1.37 0.60 -2.50 1.00 - 2.50 44 - 10 24 - 9

r
5 2 - 3/ 4 2.534 4 3 -1 / 2 3.250 82.60 E
5 3 2.800 71.10 XNTP - 3 37.59 2.46 1.25 - 4.00 2.00 - 5.00 20 - 6 12 - 5
6 2 -1 / 2 2.320
7 2 -1 / 4 2.095 6 2 -1 / 2 2.333 59.30 XNT- 4 49.78 3.22 1.25 - 6.25 2.00 - 6.25 20 - 4 12 - 4
8 2 1.865 8 2- 1 / 4 2.125 54.00
XNTF - 4 21.08 1.37 0.60 - 2.50 1.00 - 2.50 44 - 10 24 - 9
9 1 - 15 / 16 1.817 10 2 1.900 48.30
XNTK - 4 21.08 1.37 0.60 - 2.50 1.00 - 2.50 44 - 10 24 - 9
10 1 -7/ 8 1.767 12 1- 3 / 4 1.667 42.40
14 1- 5 / 8 1.554 39.5 feed direction XNTP - 4 49.78 3.22 1.25 - 6.25 2.00 - 6.25 20 - 4 12 - 5
11 1 - 13 / 16 1.714
11- 1 / 2 1 - 3/ 4 1.656 16 * 1 -1 1 2 1.438 36.5
* Based on maximum insert radius size and class 2 Aand 2B thread specifications .
12 1 - 3/ 4 1.660 * Sixteen threads per inch and finer can be cut provided minor * * For metric D and E dimensions, multiply by 25 , 4 .
diameter is 36, 5 mm ( 1.438 " ) or larger.
13 1 -5/ 8 1.542
** XNA - 6 insert only.
14 1- 9 / 16 1.485 Additional secondary clearance can be ground
16 * 1- 7 / 16 1.370 on leading edge of insert to provide sufficient
helical clearance for machining coarser threads
^ Sixteen threads per inch and finer can be cut provided minor and multistart threads . Modified standard inserts increase
diameter is 34 ,8 mm or larger. may be furnished for machining threads outside
of the limits shown.
IT clearance