MMT STANDARD OF DEPTH OF CUT EXTERNAL (RADIAL INFEED)

SOMetric(mm)
PitchTotalNumber of PassesInsert Type
()Cutting
mmDepth1234567891011121314G-class ground insertsM-class inserts with 3-D chipbreakers
0.50.310.100.080.070.06MMT16ER050ISO–
0.750.460.160.140.100.06MMT16ER075ISO–
1.00.610.180.150.120.100.06MMT16ER100ISOMMT16ER100ISO-S
1.250.770.190.170.140.110.100.06MMT16ER125ISOMMT16ER125ISO-S
1.50.920.220.210.170.140.120.06MMT16ER150ISOMMT16ER150ISO-S
1.751.070.220.210.160.130.110.090.090.06MMT16ER175ISOMMT16ER175ISO-S
2.01.230.240.230.170.160.140.120.110.06MMT16ER200ISOMMT16ER200ISO-S
2.51.530.260.230.190.170.150.130.120.110.110.06MMT16ER250ISOMMT16ER250ISO-S
3.01.840.270.250.200.180.160.140.130.120.120.110.100.06MMT16ER300ISOMMT16ER300ISO-S
3.52.150.330.300.240.210.180.170.150.140.140.120.110.06MMT22ER350ISO–
4.02.450.340.310.240.220.190.170.160.140.140.130.120.120.110.06MMT22ER400ISO–
4.52.760.380.340.280.240.220.200.180.160.160.150.140.130.120.06MMT22ER450ISO–
5.03.070.420.380.320.270.240.220.200.180.180.170.160.150.120.06MMT22ER500ISO–
mericanUN(inch)
PitchTotalNumber of PassesInsert Type
(thread/Cutting
inch)Depth1234567891011121314G-class ground insertsM-class inserts with 3-D chipbreakers
32.019.007.006.004.002MMT16ER320UN–
28.022.007.006.004.003.002MMT16ER280UN–
24.026.007.006.006.005.002MMT16ER240UN–
20.031.008.007.005.005.004.002MMT16ER200UN–
18.034.009.008.006.005.004.002MMT16ER180UN–
16.038.009.008.006.005.004.004.002MMT16ER160UNMMT16ER160UN-S
14.044.009.008.006.005.005.005.004.002MMT16ER140UNMMT16ER140UN-S
13.047.010.009.007.006.005.005.003.002MMT16ER130UN–
12.051.011.009.007.006.006.005.005.002MMT16ER120UNMMT16ER120UN-S
11.056.011.009.007.006.006.006.005.004.002MMT16ER110UN–
10.061.011.009.007.006.006.006.005.005.004.002MMT16ER100UN–
9.068.013.011.009.007.006.006.005.005.004.002MMT16ER090UN–
8.077.014.012.009.007.006.006.006.006.005.004.002MMT16ER080UN–
7.087.015.013.011.009.008.007.006.006.005.005.002MMT22ER070UN–
6.102.017.014.011.010.008.007.007.006.006.005.005.004.002MMT22ER060UN–
5.123.017.015.012.011.009.009.008.007.007.007.007.006.006.002MMT22ER050UN–

yWhitworth for BSW, BSP (inch)

PitchTotalNumber of PassesInsertType
(thread/CuttingM-class inserts with
inch)Depth1234567891011121314G-class ground inserts3-D chipbreakers
28.023.007.006.004.004.002MMT16ER280W–
26.025.007.006.005.005.002MMT16ER260W–
20.032.008.007.006.005.004.002MMT16ER200W–
19.034.008.007.006.006.005.002MMT16ER190WMMT16ER190W-S
18.035.010.007.006.005.005.002MMT16ER180W–
16.040.008.007.006.005.004.004.004.002MMT16ER160W–
14.046.009.008.007.006.005.005.004.002MMT16ER140WMMT16ER140W-S
12.054.011.010.008.006.006.006.005.002MMT16ER120W–
11.058.011.009.008.007.006.006.005.005.002MMT16ER110WMMT16ER110W-S
10.064.011.010.008.007.006.006.005.005.004.002MMT16ER100W–
9.071.011.010.008.007.006.006.006.005.005.005.002MMT16ER090W–
8.080.012.011.009.007.007.006.006.006.005.005.004.002MMT16ER080W–
7.091.013.013.010.009.008.007.007.006.006.006.004.002MMT22ER070W–
6.107.014.013.011.009.008.008.007.007.006.006.006.005.005.002MMT22ER060W–
5.128.017.016.014.011.010.009.009.008.007.007.007.006.005.002MMT22ER050W–

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.