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.