Page 887 - Tungaloy Catalog

Coated solid carbide drills for steels (metric)
DMX (D type) External Ti (C,N,O) IT9~10
Coated
IT class
Coolant
Steel Stainless Cast Iron Superalloys Materials
Hard
30° 2/3 130° For High Efficiency Drilling of Steels
Helix L/D Point angle Coated solid carbide drills
Dc2
External coolant supply
øDc2
øDc1 130° 90° øDs h8

R1
R2
L

For drilling of inch coarse thread tapped holes plus chamfering

Applicable Tap Dimensions (in)
Cat. No. Stock
Size oD od Overall Length L Flute Length R 1 Flute Length R 2
DMXU2500FD d .250 .201 .328 3.0 .625 1.25
DMXU3125FD .313 .258 .390 3.5 .781 1.56
DMXU3750FD d .375 .314 .469 4.0 .938 1.88
DMXU4375FD d .438 3.68 .516 4.5 1.09 2.19
DMXU5000FD d .500 .425 .578 5.0 1.25 2.50

For drilling of metric coarse thread tapped holes plus chamfering

Cat. No. Stock Applicable øDc1 Tolerance øDc2 Dimensions (mm)
thread size
øDs
Overall length L Flute lengthR 1 Flute lengthR 2
0

DMX0430D M5 4.3 - 0.018 7.0 7.0 81 13 28
0
DMX0510D M6 5.1 - 0.018 8.0 8.0 87 15 33

0
DMX0680D M8 6.8 - 0.022 10.0 10.0 100 20 44

0
DMX0850D M10 8.5 - 0.022 12.0 12.0 117 25 55

0
DMX1030D M12 10.3 - 0.027 14.0 14.0 132 30 66 11

Note: When machining chamfered piece, reduce the feed rate by 50%. Drilling Tools

d : Stocked items.

Regrinding
Relating Cutting Conditions Procedures Technical reference
pages (11-70) (11-76) (14-1) 11–71