MMT STANDARD OF DEPTH OF CUT INTERNAL (RADIAL INFEED)

y ISOMetric(mm)
PitchTotalNumberof PassesInsert Type
(mm)CuttingMlt ith
Depth1 23 45678 910111213 14G-class ground inserts-cass 3-D chinsers w pbreakers
0.50.290.09 0.070.07 0.06MMT11IR050ISOMMT16IR050ISO
0.750.430.15 0.130.09 0.06MMT11IR075ISOMMT16IR075ISO
1.00.580.17 0.150.11 0.090.06MMT11IR100ISOMMT16IR100ISOMMT11IR100ISO-SMMT16IR100ISO-S
1.250.720.18 0.160.12 0.110.090.06MMT11IR125ISOMMT16IR125ISOMMT11IR125ISO-SMMT16IR125ISO-S
1.50.870.21 0.200.16 0.130.110.06MMT11IR150ISOMMT16IR150ISOMMT11IR150ISO-SMMT16IR150ISO-S
1.751.010.21 0.200.15 0.120.100.090.080.06MMT11IR175ISOMMT16IR175ISOMMT16IR175ISO-S
2.01.150.24 0.220.18 0.140.120.100.090.06MMT11IR200ISOMMT16IR200ISOMMT16IR200ISO-S
2.51.440.25 0.240.21 0.150.130.120.100.09 0.090.06MMT16IR250ISOMMT16IR250ISO-S
3.01.730.26 0.250.22 0.170.140.130.120.11 0.100.090.080.06MMT16IR300ISOMMT16IR300ISO-S
3.52.020.32 0.300.23 0.190.170.150.140.13 0.120.110.100.06MMT22IR350ISO
4.02.310.33 0.310.24 0.220.180.150.140.13 0.120.120.110.100.10 0.06MMT22IR400ISO
4.52.600.36 0.330.28 0.240.210.190.160.15 0.140.130.120.120.11 0.06MMT22IR450ISO
5.02.890.41 0.380.32 0.270.240.210.180.16 0.150.140.130.120.12 0.06MMT22IR500ISO

yAmerican UN (inch)

Pitch (thread/Total CuttingNumber of PassesInsert Type
inch)Depth123456789101112 13 14G-class ground insertsM-class inserts with 3-D chipbreakers
32.018.006 .006.004.002MMT11IR320UNMMT16IR320UN
28.020.006 .005.004.003.002MMT11IR280UNMMT16IR280UN
24.024.007 .006.005.004.002MMT11IR240UNMMT16IR240UN
20.029.007 .006.005.005.004.002MMT11IR200UNMMT16IR200UN
18.032.008 .007.006.005.004.002MMT11IR180UNMMT16IR180UN
16.036.008 .007.006.005.004.004.002MMT11IR160UNMMT16IR160UNMMT16IR160UN-S
14.041.008 .007.006.005.005.004.004.002MMT11IR140UNMMT16IR140UNMMT16IR140UN-S
13.044.009 .007.006.006.005.005.004.002MMT16IR130UN
12.048.009 .009.007.006.005.005.005.002MMT16IR120UNMMT16IR120UN-S
11.052.009 .009.008.006.005.005.004.004.002MMT16IR110UN
10.058.010 .009.008.006.005.005.005.004.004.002MMT16IR100UN
9.064.012 .009.008.007.006.006.005.005.004.002MMT16IR090UN
8.072.012 .010.008.007.006.006.006.005.005.005 .002MMT16IR080UN
7.082.014 .012.009.008.007.007.006.006.006.005 .002MMT22IR070UN
6.096.016 .013.010.009.007.007.006.006.006.005 .005.004 .002MMT22IR060UN
5.115.016 .014.012.010.009.008.008.007.007.006 .006.005 .005 .002MMT22IR050UN

yWhitworth for BSW, BSP (inch)

Pitch (thread/Total CuttingNumber of PassesInsert TypeMl it ith
inch)Depth12345678910 1112 13 14G-class ground inserts-cass nsers w 3-D chipbreakers
28.023.007.006.004.004.002MMT16IR280W
26.025.007.006.005.005.002MMT16IR260W
20.032.008.007.006.005.004.002MMT16IR200W
19.034.008.007.006.006.005.002MMT11IR190WMMT16IR190WMMT16IR190W-S
18.035.010.007.006.005.005.002MMT16IR180W
16.040.008.007.006.005.004.004.004.002MMT16IR160W
14.046.009.008.007.006.005.005.004.002MMT11IR140WMMT16IR140WMMT16IR140W-S
12.054.011.010.008.006.006.006.005.002MMT16IR120WMMT16IR120W-S
11.058.011.009.008.007.006.006.005.004.002MMT16IR110W
10.064.011.010.008.007.006.006.005.005.004.002MMT16IR100W
9.071.011.010.008.007.006.006.006.005.005.005 .002MMT16IR090W
8.080.012.011.009.007.007.006.006.006.005.005 .004.002MMT16IR080W
7.091.013.013.010.009.008.007.007.006.006.006 .004.002MMT22IR070W
6.107.014.013.011.009.008.008.007.007.006.006 .006.005 .005 .002MMT22IR060W
5.128.017.016.014.011.010.009.009.008.007.007 .007.006 .005 .002MMT22IR050W

Note 1) Set the finishing allowance on a diameter at approx. .004 inch when using a full form insert.

  • Please note the cutting depth and the number of passes when a nose radius of a partial or semi-full form insert or of an internal threading insert is small to prevent damage to the insert nose.
  • Please set the cutting depth sufficiently deep enough on materials such as hardened steel or austenitic stainless steel to help prevent premature wear and chipping caused by the outer layer of the material. G017