DLC Coating NHGS Drilling
■ 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
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
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
NHGS Type (Helix Angle 30°) Competitor's Product (Low Helix) Competitor's Product Straight Edge
470
350
400
260
0.5
200
0
0.0
.0079
.0157
.0315
.0079
.0157
.0315
Feed Rate f (IPR)
Feed Rate f (IPR)
Tool: MDW 0800NHGS5 (DL1300) Cutting Speed: v c =656 SFM Coolant: Internal supply (1.5MPa)
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)
Part Material: Aluminum Alloy Die Casting Machine: Vertical machining center (BT30) Coolant: Emulsion (dilute to around 25x)
Machined hole accuracy (hole expansion)
● Pre-cast hole accuracy within ±1/10 to ±1/5 of axial offset Machined hole accuracy (hole position accuracy) Pre-cast hole accuracy (hole position accuracy) Feed Rate Offset .0098 IPR .0197 IPR .0295 IPR .0118” ±.0012” ±.0016” ±.0024” .0197” ±.0020” ±.0028” ±.0039” Conventional drill: .0118” ±.0035” ±.0075” ● 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.
● Stable hole accuracy with hole expansion within .0004” Achieves minimal expansion and stable machining from low to high feed rates
Setting offset
ø6.8 Virtual precast hole
Hole diameter expansion
.0006
Max.
Average
ø8.5
.0004
Axial offset .0118” Axial offset .0197” Conventional drill: Axial offset .0118”
Min.
Axial offset .0118” Axial offset .0197” Conventional drill: Axial offset .0118”
.0002
Feed Rate f = .0098 IPR
Feed Rate f = .0197 IPR Feed Rate f = .0098 IPR
Feed Rate f = .0295 IPR
Feed Rate f = .0197 IPR
Feed Rate f = .0295 IPR
.0039 .0059 .0059
.0059
0.000
.0039 .0059
.0059
.0059
.0039
.0039
.0039
.0019 .0019
.0019
.0019
.0019
.0019
-.0002
0
0
0
-.0059 -.0039 -.0019
0
.0019 .0039 .0059
-.0059 -.0039 -.0019 0
.0019
.0039
.0059
-.0059 -.0039
-.0019 0
.0019
.0039
.0059
2
2
2
0
0
0
-.0059 -.0039 -.0019
0
.0019 .0039 .0059
-.0059 -.0039 -.0019 0 .0019
.0039 .0059
-.0059 -.0039 -.0019 0 .0019 .0039
.0059
2
2
2
-.0019
-.0019
-.0019
-.0004
-.0019
.0079
.0157
.0315
-.0059 -.0039 -.0019 -.0059 -.0039
-.0019
-.0059 -.0039
-.0059 -.0039
Feed Rate f (IPR)
-.0059 -.0039
-.0059 -.0039
X direction offset (Inch)
X direction offset (Inch)
X direction offset (Inch)
Tool: MDW 0800NHGS5 (DL1300) Cutting Speed: v c =656 SFM Coolant: Internal supply (1.5MPa)
Part Material: Aluminum Alloy Die Casting Machine: Vertical machining center (BT30) Coolant: Emulsion (dilute to around 25x)
X direction offset (Inch)
X direction offset (Inch)
X direction offset (Inch)
Tool: MDW 0850NHGS5 (DL1300) Cutting Speed: v c =656 SFM (n=7, 489 RPM) Coolant: Internal supply
Part Material: Alluminum Alloy Machine: Vertical machining center (BT30)
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