Micro Long Drills MLDH-L / MLDH-P
■ General Features Micro Long Drills are oil-hole drills for high efficiency drilling that were developed for drilling deep, small-diameter holes. These next-generation drills for small diameter deep holes feature improved strength - addressing a frequent problem with small diameter drills.
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■ Features and Applications ● Deep hole drilling New groove shape ensures good drill rigidity and chip evacuation. High-efficiency drilling to depths of over 20 times the drill diameter at over v f = 500mm/min (drill diameter ø1.3, Stainless Steel). Optimal thinning and edge balance for stable chip control. ● Long tool life Special coating provides long tool life with a wide variety of work materials. Improved chip evacuation makes it possible to reduce spindle load fluctuation, ensuring long, stable tool life.
■ Product Range Applications
Diameter Range ( mm ) ø0.8 to 2.0
Cat. No.
Hole Depth (L/D)
MLDH □□□□ L5 MLDH □□□□ L12 MLDH □□□□ L20 MLDH □□□□ L30 MLDH □□□□ P
up to 5
ø0.8 to 2.0
up to 12
Deep Hole Drilling
ø0.8 to 2.0
up to 20
ø0.8 to 2.0
up to 30
ø0.8 to 2.0
up to 2
For Guide Holes
■ Recommended Cutting Conditions - METRIC
MLDH-P / MLDH-L5
( v c : Cutting Speed ( m/min ), f : Feed Rate ( mm/rev ))
Dia. DC ( mm )
Cutting Conditions
Mild Steel up to 200HB
General Steel up to 250HB
Alloy Steel up to 300HB
Stainless Steel up to 200HB
Cast Iron FC/FCD 40 - 60 0.02 - 0.04
Aluminum Alloy
Heat-resistant Steel
40 - 60
40 - 60
40 - 60
20 - 40
50 - 70
5 - 15
v c
ø1.0
0.01 - 0.03
0.01 - 0.03
0.01 - 0.03
0.01 - 0.03
0.03 - 0.06
0.005 - 0.02
f
40 - 60
40 - 60
40 - 60
20 - 40
40 - 60
50 - 70
5 - 15
v c
ø1.5
0.04 - 0.12
0.04 - 0.12
0.04 - 0.12
0.02 - 0.10
0.04 - 0.12
0.05 - 0.15
0.01 - 0.05
f
40 - 60
40 - 60
40 - 60
20 - 40
40 - 60
50 - 70
5 - 15
v c
ø2.0
0.06 - 0.12
0.06 - 0.12
0.06 - 0.12
0.04 - 0.10
0.06 - 0.12
0.08 - 0.15
0.01 - 0.05
f
Min. - Max.
MLDH-L12 / MLDH-L20 / MLDH-L30
Dia. DC ( mm )
Cutting Conditions
Mild Steel up to 200HB
General Steel up to 250HB
Alloy Steel up to 300HB
Stainless Steel up to 200HB
Cast Iron FC/FCD
Aluminum Alloy
Heat-resistant Steel
40 - 60
40 - 60
40 - 60
20 - 40
40 - 60
50 - 70
5 - 15
v c
ø1.0
0.01 - 0.03
0.01 - 0.03
0.01 - 0.03
0.01 - 0.03
0.02 - 0.04
0.03 - 0.06
0.005 - 0.02
f
40 - 60
40 - 60
40 - 60
20 - 40
40 - 60
50 - 70
5 - 15
v c
ø1.5
0.03 - 0.07
0.03 - 0.07
0.03 - 0.07
0.02 - 0.07
0.04 - 0.10
0.05 - 0.12
0.01 - 0.03
f
40 - 60
40 - 60
40 - 60
20 - 40
40 - 60
50 - 70
5 - 15
v c
ø2.0
0.04 - 0.08
0.04 - 0.08
0.04 - 0.08
0.04 - 0.08
0.04 - 0.10
0.05 - 0.12
0.01 - 0.03
f
Min. - Max.
■ Application Examples
● Automotive component molds - Stainless Steel Tool : MLDH 1400L20 (guide: MLDH1400P) Machine : Vertical machining center (HSKA63) Coolant
● Tooling components - Tool Steel Tool
: MLDH 1900L20 (guide: MLDH1900P) : Vertical machining center (HSKA63)
Machine
: Internal coolant supply (emulsion type, pump source pressure: 4MPa)
Coolant
: Internal coolant supply (emulsion type, pump source pressure: 4MPa)
Cutting Conditions
:
v c =197 SFM, f =0.001 IPR, H =0.827"
Cutting Conditions
:
v c =195 SFM, f =0.004 IPR, H =1.063"
Tool Life
: 6 00 holes (37.4 ft.)
Tool life
: 600 units
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