Page 822 - Tungaloy Catalog

Basic Selection of Drilling Tools

General Drilling (Replacable Carbide Tip)

11-51 Applicable work materials
Steel Stainless Cast lron Non-ferrous Superalloys
TIDC + DMP
Coolant
Structure supply method Coating Helix angle Shank Point angle
Indexable Internal s - 10, 12, 14, 140°
15, 17, 19
Hole depth Drill diameter Approximate accuracy
Hole diameter (IT) 9 ~ 10
< 3 x tool diameter ø10.0 ~ ø19.9 Roughness (RzJIS): 6.3 ~ 25
Comparison of tool life when drilling Competitor B (Fracture)
alloy steel
Competitor A (Fracture)
Features
Clamping system for secure and easy operation .012
- Drill head can be changed easily even on the machine. .008 Competitor A
- High clamping force and accurate clamp system provides Competitor B
stable machining. Width of corner wear VBc (mm) .004 0 20 40 60 80 The combination of a rigid
100
drill body and head with the
With exclusive chamfering adaptor, DrillMeister AH725 grade provides a
balance of excellent wear
allows both drilling and chamfering in one 0 and chipping resistance
to provide stable and long
.787
1.57
operation. Machining length (m) 2.36 tool life
- 3 kinds of chamfering angle can be selected and the chamfering Drill diameter : øDc = ø12 mm Hole depth : H = 1.400” (blind hole)
adaptor is freely adjustable. Work material : SCM440 Coolant : Wet
Cutting speed
: SFM = 330
Feed : f = .010”/rev Machine : Vertical M/C

11

Drilling Tools

11–6