Page 823 - Tungaloy Catalog

Small Diameter Drilling

DSM 11-78 Applicable work materials
Steel Stainless Cast lron Non-ferrous Materials
Hard
Giga Mini Drills
Coolant
Structure supply method Coating Helix angle Shank Point angle
Solid External s 30° .118 140°
Hole depth Drill diameter Approximate accuracy
< 3~15 X tool diameter .004 ~ .118 —
d Tool life comparison
0.25
.010 Showed excessive wear after 290 holes
Corner wear width VBc (in) .004 DSM Further drilling
.008
0.20
0.15
Features .006 Competitor A
DSM
0.10
0.05
Highly tough tool material and rigid tool geometry .002 Competitor B was possible
Broken
• Allows stable drilling for extra small diameter (.004" to .118") 0 0 0 100 200 300 400 No. of holes
where tool breakage is likely to occur. machined
• Web thinning in spite of small diameter drills assures accurate d Cutting conditions
hole positioning. Drill diameter : .118" Cutting speed : Vc = 170 SFM
Work material : Carbon steel Feed : f = .002"/rev
Dedicated coating for small diameter drilling Machine : Vertical machining center Step length : .029"
: Water soluble type
Coolant
Drilling depth : .590" (blind hole)
• Machinable number of holes is 1.5 to 2 times higher than
competitor drills.
• Tool life improvements when machining stainless steel and The DSM drill showed less wear and
could continue further drilling.
Kovar.
11

Drilling Tools

11–7