Page 137 - ISCAR(HOLE_MAKING_CATALOG_65)

· USER GUIDE
INDEXABLE DRILLS

Pre-Thread DCT Drills
There are two main applications for pre-thread hole drilling:
Drilling pre-thread blind and through holes:
Drilling with a 45° Chamfer Drilling and Counter Boring

6 mm max
Pre-Thread DCT Metric Threads Recommended Diameters
Head TR M Helicoil
Drill Designation Dia. Range M Thread MF Head Head Dia. Head Dia. Head Dia.
Dia. Thread Thread
M8 6.8 MF8X0.75 7.20 TR10X3 7.49
DCT 068-021-14B-M8 6.80-7.49
MF8X1 7.00
M10 8.5 MF10X1 8.99 TR10X1.5 8.60 M8 8.40
DCT 085-026-14B-M10 8.30-8.99
MF10X1.25 8.80
M12 10.2 MF11X1 10.00 TR12X2 10.20 M10 10.50
MF12X1 10.99 TR14X4 10.50
DCT 102-030-14B-M12 10.0-10.99
MF12X1.25 10.80
MF12X1.5 10.50
M14 12.0 MF13X1 12.00 TR14X2 12.20 M12 12.50
MF14X1 12.99 TR16X4 12.30
DCT 120-035-16B-M14 12.0-12.99
MF14X1.25 12.80
MF14X1.5 12.50
M16 14.0 MF14X1 14.00 TR18X4 14.30 M14 14.99
DCT 140-039-18B-M16 14.0-14.99 MF16X1 14.99
MF16X1.5 14.50
M20 17.5 TR22X5 17.30
DCT 175-042-20B-M20 17.3-17.99
MF20X2 17.99
DCT 210-048-25B-M24 21.0-21.99 M24 21.0 MF22X1 21.00

Inch Threads
Dia. UNF Head Head UNC Helicoil Head BSW Head Head
Drill Designation UNC Thread BSF Thread
Range Thread Dia. Dia. Thread Dia. Thread Dia. Dia.
8.30-
DCT 085-026-14B-M10 UNF3/8-24 8.5 UNC5/16-18 8.4
8.99
10.0-
DCT 102-030-14B-M12 UNC1/2-13 10.8 BSW1/2-12 10.5 BSF1/2-16 10.99
10.99
12.0-
DCT 120-035-16B-M14 UNC9/16-12 12.3 BSF9/16-16 12.50
12.99
14.0-
DCT 140-039-18B-M16 UNF5/8-18 14.5
14.99
17.3-
DCT 175-042-20B-M20 UNF3/4-16 17.5
17.99
Inch Threads
Dia. NPT Head Head BSP Head Head UNJF Helicoil Head
Drill Designation BSF Thread UNEF Thread
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 BSF9/16-16 12.50
DCT 140-039-18B-M16 14.0-14.99 NPT3/8-18 14.5 UNEF5/8-24 14.8 UNJF5/8-18 14.5
DCT 175-042-20B-M20 17.3-17.99 NPT1/2-14 17.5 UNEF3/4-20 17.8

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