Page 137 - HOLE MAKING CATALOG p001-148
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· USER GUIDE INDEXABLE DRILLS
Pre-Thread DCT Drills Drilling and Counter Boring
There are two main applications for pre-thread hole drilling:
Drilling pre-thread blind and through holes:
Drilling with a 45° Chamfer
6 mm max
Pre-Thread DCT Metric Threads Recommended Diameters
Drill Designation Dia. Range M Thread Head MF Head Head Dia. TR Head Dia. M Helicoil Head Dia.
Dia. Thread Thread 8.40
10.50
DCT 068-021-14B-M8 6.80-7.49 M8 6.8 MF8X0.75 7.20 TR10X3 7.49 M8
DCT 085-026-14B-M10 8.30-8.99 M10 MF8X1 7.00 TR10X1.5 8.60 M10 12.50
DCT 102-030-14B-M12 10.0-10.99 M12 8.99 TR12X2 10.20
8.5 MF10X1 8.80 TR14X4 10.50 M12 14.99
DCT 120-035-16B-M14 12.0-12.99 M14 MF10X1.25 10.00
10.99 TR14X2 12.20 M14
DCT 140-039-18B-M16 14.0-14.99 M16 10.2 MF11X1 10.80 TR16X4 12.30
DCT 175-042-20B-M20 17.3-17.99 M20 MF12X1 10.50
DCT 210-048-25B-M24 21.0-21.99 M24 12.00 TR18X4 14.30
MF12X1.25 12.99
MF12X1.5 12.80 TR22X5 17.30
12.0 MF13X1 12.50
MF14X1 14.00
MF14X1.25 14.99
MF14X1.5 14.50
14.0 MF14X1
MF16X1 17.99
MF16X1.5 21.00
17.5
MF20X2
21.0 MF22X1
Inch Threads Dia. UNF Head UNC Thread Head UNC Helicoil Head BSW Head BSF Thread Head
Drill Designation Range Thread Dia. Dia. Thread Dia. Thread Dia. Dia.
UNF3/8-24 8.5 UNC1/2-13
DCT 085-026-14B-M10 8.30- UNC9/16-12 UNC5/16-18 8.4
DCT 102-030-14B-M12 8.99 UNF5/8-18 14.5
DCT 120-035-16B-M14 10.0- UNF3/4-16 17.5 10.8 BSW1/2-12 10.5 BSF1/2-16 10.99
DCT 140-039-18B-M16 10.99
DCT 175-042-20B-M20 12.0- 12.3 BSF9/16-16 12.50
12.99
14.0-
14.99
17.3-
17.99
Inch Threads
Drill Designation Dia. NPT Head BSF Thread Head BSP Head UNEF Thread Head UNJF Helicoil Head
Range Thread Dia. Dia. Thread Dia. Dia. Thread Dia.
DCT 085-026-14B-M10 8.30-8.99 NPT1/8-27 8.5 G1/8-28 8.8 UNEF3/8-32 8.7 UNJF3/8-24 8.6
DCT 102-030-14B-M12 10.0-10.99 BSF1/2-16 10.99
DCT 120-035-16B-M14 12.0-12.99 14.5 BSF9/16-16 12.50 UNEF5/8-24 14.8 UNJF5/8-18 14.5
DCT 140-039-18B-M16 14.0-14.99 NPT3/8-18 17.5 UNEF3/4-20 17.8
DCT 175-042-20B-M20 17.3-17.99 NPT1/2-14
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