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Radial Passes

Thread milling is like any other material removal process. Depending on how much material needs to be removed and the material’s machinability, multiple machining passes may be required. The coarser the pitch, the more material that needs removed. Use the chart below for the suggested number of radial passes. 65% 100%

90% The percentage of material removal for each machining pass is determined based off total thread height. Percentage of material removal varies depending on the application, but general starting percentages are:

1 pass

100%

2 passes 3 passes 4 passes

75% 60% 60%

100%

80% 100%

80% 90% 100%

54 | THREAD MILLING REFERENCE GUIDE