DLC Coating Drills NHGS Series
■ Features
● High-efficiency drilling DLC Coating (AURORA Coat) and low resistance WL (Wide L) thinning drastically reduce cutting force. ● Stable drilling performance Special cutting edge design and WW (Wide W) margin improve hole quality. ● Long tool life DLC Coating (AURORA Coat) coupled with the cutting edge shape acheives a long and stable tool life. ● Deep hole drilling
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Drills for deep hole drilling can be made to oder. (Production range: Drill diameters: ø3.0 to ø16.0mm Overall length: Available on inquiry)
■ Product Range (Stocked Sizes)
Diameter Range ( mm ) Hole Depth (L/D)
Coolant Supply
Cat. No.
MDW □□□□ NHGS3 MDW □□□□ NHGS5 MDW □□□□ NHGS10
up to 3
ø3.0 to 16.0
Internal
up to 5
ø3.0 to 13.0
up to 10
■ Performance Cutting force
Machined surface quality
● Low cutting force, achieving 2 to 4 times the feed rate The cutting force of the NHGS is 1/2 that of competitors' 30° helix dri lls > d ouble the feed rate! 1/3 that of competitors' light helix drills > 3x the feed rate! 1/4 that of straight-blade drills > 4x the feed rate!
● Achieves good surface roughness over a wide range of feed rates Good surface roughness from low to high feed rates: Ra=0.11 to 0.25 Rz (J94)=0.66 to 1.62
Thrust
Finished Surface Roughness
Legend (common)
1,400
2.5
Ra Rz ( J94 )
1,180
1,200
2.0
1,000
830
1.5
800
700
600
550
600
1.0
470
350
400
260
0.5
200
0
0.0
0.2
0.4
0.8
0.2
0.4
0.8
Feed Rate f (mm/rev)
Feed Rate f (mm/rev)
Part Material: Aluminum Alloy Die Casting Machine: Vertical machining center (BT30) Coolant: Emulsion (dilute to around 25x)
Part Material: Aluminum Alloy Die Casting Machine: Vertical machining center (BT30) Coolant: Emulsion (dilute to around 25x)
Tool: MDW 0800NHGS5 (DL1300) Cutting Speed: v c =656 SFM Coolant: Internal supply (1.5MPa)
Tool: MDW 0800NHGS5 (DL1300) Cutting Speed: v c =656 SFM Coolant: Internal supply (1.5MPa)
Machined hole accuracy (hole expansion)
● Pre-cast hole accuracy within ±1/10 to ±1/5 of axial offset Machined hole accuracy (hole position accuracy)
● Stable hole accuracy with hole expansion within 0.01mm Achieves minimal expansion and stable machining from low to high feed rates
Pre-cast hole accuracy (hole position accuracy) Feed Rate Offset 0.25mm/rev 0.50mm/rev
Setting offset
ø6.8 Virtual precast hole
0.75mm/rev
Hole diameter expansion
0.3mm
±0.03mm ±0.04mm ±0.06mm
0.015
0.5mm
±0.05mm ±0.07mm ±0.10mm
Max.
Conventional drill: 0.3mm
±0.09mm ±0.19mm
Average
ø8.5
0.010
● Test method An axial offset of 0.3mm to 0.5mm is set for a virtual pre-cast hole (ø6.8) and a hole is drilled with an ø8.5 drill before measuring the deviation from the target position.
Min.
0.005
Pre-cast drilling performance (hole position accuracy)
Axial offset 0.3mm Axial offset 0.5mm Conventional drill: Axial offset 0.3mm
0.000
Feed Rate f = 0.25 mm/rev
Feed Rate f = 0.50 mm/rev
Feed Rate f = 0.75 mm/rev
0.15
0.15
0.15
0.1
0.1
0.1
-0.005
0.05
0.05
0.05
0
0
0
-0.15 -0.1
-0.05
0
0.05
0.1
0.15
-0.15 -0.1
-0.05
0
0.05
0.1
0.15
-0.15 -0.1
-0.05
0
0.05
0.1 0.15
-0.010
2
2
2
0.2
0.4
0.8
-0.05
-0.05
-0.05
Feed Rate f (mm/rev)
-0.1
-0.1
-0.1
Part Material: Aluminum Alloy Die Casting Machine: Vertical machining center (BT30) Coolant: Emulsion (dilute to around 25x)
Tool: MDW 0800NHGS5 (DL1300) Cutting Speed: v c =656 SFM Coolant: Internal supply (1.5MPa)
-0.15
-0.15
-0.15
X direction offset (mm)
X direction offset (mm)
X direction offset (mm)
Part Material: Alluminum Alloy Machine: Vertical machining center (BT30)
Tool: MDW 0850NHGS5 (DL1300) Cutting Speed: v c =656 SFM (n=7, 489 RPM) Coolant: Internal supply
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