Page 328 - Carmex - Inch Catalog 2022

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Mill-Thread Solid Carbide

UN With internal coolant bore

Tools for Internal Thread

Grade P M K N S H
MT7      ≤ 47 HRc

Pitch UNC UNF UNEF Ordering Code d D No. of I L
TPI Flutes

32 8 10 12 MTB 0250 C02 32 UN 1/4 .126 3 .27 2.5
32 5/16 MTB 0250 C05 32 UN 1/4 .250 3 .58 2.5
32 3/8 MTB 0312 D07 32 UN 5/16 .312 4 .74 2.5
28 1/4 MTB 0250 C04 28 UN 1/4 .197 3 .44 2.5
28 1/4 MTB 0250 C06 28 UN 1/4 .205 3 .59 2.5
28 7/16-1/2 MTB 0250 C05 28 UN 1/4 .250 3 .56 2.5
24 5/16 MTB 0312 C05 24 UN 5/16 .260 3 .56 2.5
24 3/8 9/16-5/8 MTB 0312 D08 24 UN 5/16 .312 4 .81 2.5
20 1/4 MTB 0250 C04 20 UN 1/4 .185 3 .48 2.5
20 7/16-1/2 MTB 0312 C08 20 UN 5/16 .312 3 .83 2.5
20 1/2 MTB 0375 D08 20 UN 3/8 .375 4 .88 3.0
20 3/4-1 MTB 0500 E10 20 UN 1/2 .500 5 1.07 4.0
18 5/16 MTB 0250 C05 18 UN 1/4 .220 3 .58 2.5
18 5/16 MTB 0250 C08 18 UN 1/4 .236 3 .81 2.5
18 9/16-5/8 1 1/8-1 5/8 MTB 0500 D10 18 UN 1/2 .445 4 1.03 4.0
16 3/8 MTB 0312 C06 16 UN 5/16 .264 3 .66 2.5
16 3/8 MTB 0312 C09 16 UN 5/16 .291 3 .97 2.5
16 3/4 MTB 0500 D12 16 UN 1/2 .500 4 1.22 4.0
14 7/16 MTB 0312 C08 14 UN 5/16 .303 3 .82 2.5
14 7/16 MTB 0375 C11 14 UN 3/8 .335 3 1.11 3.0
14 7/8 MTB 0625 E14 14 UN 5/8 .625 5 1.46 4.0
13 1/2 MTB 0375 C08 13 UN 3/8 .362 3 .89 3.0
13 1/2 MTB 0375 D12 13 UN 3/8 .375 4 1.27 3.0
12 9/16 MTB 0500 C10 12 UN 1/2 .413 3 1.04 4.0
12 9/16 MTB 0500 D14 12 UN 1/2 .457 4 1.46 4.0
12 1-1 1/2 MTB 0625 E16 12 UN 5/8 .625 5 1.63 4.0
11 5/8 MTB 0500 C11 11 UN 1/2 .449 3 1.14 4.0
11 5/8 MTB 0500 D15 11 UN 1/2 .472 4 1.50 4.0
10 3/4 MTB 0625 D13 10 UN 5/8 .567 4 1.35 4.0
10 3/4 MTB 0625 E19 10 UN 5/8 .579 5 1.95 4.0
9 7/8 MTB 0625 C15 9 UN 5/8 .625 3 1.50 4.0
8 1 MTB 0750 D16 8 UN 3/4 .750 4 1.69 4.0
7 1 1/8 - 1 1/4 MTB 0750 D17 7 UN 3/4 .750 4 1.78 4.0
Order example: MTB 1212 D31 16 UN MT7 First choice Alternative
For thread mills with coolant through the flutes see next page
For small thread mills see pages B09-5, 6, 12, 15, 17 and B11-4, 6
B08-10