Selecting the correct tooth pitch to cut Pipes

Wall
thickness		 Diam. Ext. (mm)
TEETH PER INCH (t.p.i.)
   
mm 20 40 60 80 100 120 150 200 300 400 500 600 700 800
                             
2 14 14 14 14 14 14 10-14 10-14 8-12 8-12 6-10 6-10 5-8 5-8
3 14 14 10-14 10-14 10-14 10-14 8-12 8-12 6-10 6-10 5-8 5-8 5-8 4-6
4 14 14 10-14 10-14 8-12 8-12 8-12 8-12 5-8 5-8 4-6 4-6 4-6 4-6
5 14 10-14 10-14 10-14 8-12 8-12 8-12 6-10 5-8 5-8 4-6 4-6 4-6 4-6
6 14 10-14 10-14 8-12 8-12 8-12 8-12 5-8 5-8 4-6 4-6 4-6 3-4 3-4
8 14 10-14 8-12 8-12 8-12 6-10 6-10 5-8 4-6 4-6 4-6 3-4 3-4 3-4
10   8-12 6-10 6-10 6-10 5-8 5-8 4-6 4-6 4-6 3-4 3-4 3-4 3-4
12   8-12 6-10 6-10 5-8 5-8 4-6 4-6 4-6 3-4 3-4 3-4 3-4 2-3
15   8-12 6-10 5-8 5-8 4-6 4-6 4-6 3-4 3-4 3-4 2-3 2-3 2-3
20     6-10 5-8 4-6 4-6 4-6 3-4 3-4 3-4 2-3 2-3 2-3 2-3
30       4-6 4-6 4-6 3-4 3-4 3-4 2-3 2-3 2-3 2-3 2-3
50           3-4 3-4 3-4 2-3 2-3 2-3 2-3 2-3 2-3
75               2-3 2-3 2-3 2-3 2-3 1,4-2 1,4-2
100                 2-3 2-3 1,4-2 1,4-2 1,4-2 1,4-2
150                   2-3 1,4-2 1,4-2 1,4-2 1,4-2
200                     1,4-2 1,4-2 1,4-2 1,0-1,4
250                       1,4-2 1,0-1,4 1,0-1,4
300                         1,0-1,4 1,0-1,4