Micro Long Drills MLDH-L / MLDH-P Type
■ 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 - addresses a frequent problem with small diameter drills.
■ 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.
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■ Product Range
Diameter Range (mm)
Applications
Cat. No.
Hole Depth (L/D)
Number of items
41 items available Worldwide Warehouse 41 items available Worldwide Warehouse 41 items available Worldwide Warehouse 41 items available Worldwide Warehouse 41 items available Worldwide Warehouse
MLDH □□□□ L5 MLDH □□□□ L12 MLDH □□□□ L20 MLDH □□□□ L30 MLDH □□□□ P
ø0.8 to 2.0
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
For Guide Holes
ø0.8 to 2.0
up to 2
■ Recommended Cutting Conditions - METRIC
MLDH-P Type/MLDH-L5 Type
( 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
Aluminum Alloy
Heat-resistant Steel
v c 40 - 50 - 60 40 - 50 - 60 40 - 50 - 60 20 - 30 - 40 40 - 50 - 60 50 - 60 - 70
5 - 10 - 15
ø1.0
f 0.01 - 0.02 - 0.03 0.01 - 0.02 - 0.03 0.01 - 0.02 - 0.03 0.01 - 0.02 - 0.03 0.02 - 0.03 - 0.04 0.03 - 0.04 - 0.06 0.005 - 0.01 - 0.02
v c 40 - 50 - 60 40 - 50 - 60 40 - 50 - 60 20 - 30 - 40 40 - 50 - 60 50 - 60 - 70
5 - 10 - 15
ø1.5
f 0.04 - 0.08 - 0.12 0.04 - 0.08 - 0.12 0.04 - 0.08 - 0.12 0.02 - 0.05 - 0.10 0.04 - 0.08 - 0.12 0.05 - 0.10 - 0.15 0.01 - 0.03 - 0.05
v c 40 - 50 - 60 40 - 50 - 60 40 - 50 - 60 20 - 30 - 40 40 - 50 - 60 50 - 60 - 70
5 - 10 - 15
ø2.0
f 0.06 - 0.08 - 0.12 0.06 - 0.08 - 0.12 0.06 - 0.08 - 0.12 0.04 - 0.06 - 0.10 0.06 - 0.08 - 0.12 0.08 - 0.12 - 0.15 0.01 - 0.03 - 0.05 Min. - Optimum - Max.
MLDH-L12 Type/MLDH-L20 Type/MLDH-L30 Type
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
v c 40 - 50 - 60 40 - 50 - 60 40 - 50 - 60 20 - 30 - 40 40 - 50 - 60 50 - 60 - 70
5 - 10 - 15
ø1.0
f 0.01 - 0.02 - 0.03 0.01 - 0.02 - 0.03 0.01 - 0.02 - 0.03 0.01 - 0.02 - 0.03 0.02 - 0.03 - 0.04 0.03 - 0.04 - 0.06 0.005 - 0.01 - 0.02
v c 40 - 50 - 60 40 - 50 - 60 40 - 50 - 60 20 - 30 - 40 40 - 50 - 60 50 - 60 - 70
5 - 10 - 15
ø1.5
f 0.03 - 0.05 - 0.07 0.03 - 0.05 - 0.07 0.03 - 0.05 - 0.07 0.02 - 0.04 - 0.07 0.04 - 0.07 - 0.10 0.05 - 0.08 - 0.12 0.01 - 0.02 - 0.03
v c 40 - 50 - 60 40 - 50 - 60 40 - 50 - 60 20 - 30 - 40 40 - 50 - 60 50 - 60 - 70
5 - 10 - 15
ø2.0
f 0.04 - 0.06 - 0.08 0.04 - 0.06 - 0.08 0.04 - 0.06 - 0.08 0.04 - 0.06 - 0.08 0.04 - 0.07 - 0.10 0.05 - 0.08 - 0.12 0.01 - 0.02 - 0.03 Min. - Optimum - Max.
■ Application Examples
● Automotive component molds - Stainless Steel
● Tooling components - Tool Steel
Tool
: MLDH 1400L20 (guide: MLDH1400P) : Vertical machining centre (HSKA63)
Tool
: MLDH 1900L20 (guide: MLDH1900P) : Vertical machining centre (HSKA63)
Machine Coolant
Machine Coolant
: Internal coolant supply (emulsion type, pump source pressure: 4MPa)
: Internal coolant supply (emulsion type, pump source pressure: 4MPa)
Cutting Conditions : v
f =0.001 IPR, H =0.827"
Cutting Conditions : v
f =0.004 IPR, H =1.063"
c =197 SFM,
c =195 SFM,
Tool Life
: 600 holes (37.4 ft.)
Tool life
: 600 units
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