8D · Solid Carbide Drill · ø4.00mm

ø4.00 mm 8D Solid Carbide DrillNo Internal Coolant · External Flood Compatible

The 8D solid carbide drill without internal coolant is suited to machines with external high-pressure coolant delivery or where through-coolant tooling is not available. Peck drilling cycles with proper chip-break intervals are essential at this depth. Consistent substrate quality and Balzers PVD coating maintain cutting edge integrity across the full flute length.

Flute 42.00 mmShank ø4.00 mmOAL 75.00 mm140° PointTiAlN CoatingNo Coolant ChannelMOQ 1 pc

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Reference price

$17.53

Ref. factory price (USD)

Based on rod stock cost as of 2026-03-31. Final quotation may differ.

ø4.00mm 8D Solid Carbide Drill

SKU: SCD-SCD-8D-D400

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✓ Factory direct pricing

✓ MOQ 1 piece, stock ships 1–5 days

✓ Custom lengths & diameters available

Full Dimensions

Technical Specifications

Cutter Diameter (D1 h7)ø4.00 mm
Imperial Equivalent0.1575"
Flute Length (L2)42.00 mm
Shank Diameter (D2 h6)ø4.00 mm
Overall Length (L1)75.00 mm
Depth Ratio8D (8× diameter)
Point Angle140°
Helix Angle30°
Number of Flutes2
Internal CoolantNone External flood coolant compatible
CoatingTiAlN / TiSiN Oerlikon Balzers BALINIT®
SubstrateK10/K20 Solid Carbide 10% Co binder
ToleranceDIN 1414 · ISO 5419
MOQ1 piece
Lead Time (standard)1–5 business days
Lead Time (custom)5–15 business days

8D Dimensional Drawing

ø4.00mm 8D solid carbide drill dimensional drawing — L2=42.00mm OAL=75.00mm
D1 h7
ø4.00
L2
42.00
D2 h6
ø4.00
L1
75.00
Point
140°
Ratio
8D

Where This Tool Excels

ø4.00mm 8D — recommended applications

  • ▸ PCB sub-assembly fixtures
  • ▸ Small instrument housings
  • ▸ Jig & fixture components
  • ▸ Prototype precision parts
Machining Tip: At ø4.00mm, use compressed air rather than flood coolant to prevent re-cutting of fine chips. Feed rate 0.04–0.08 mm/rev; spindle speed up to 8,000 RPM depending on material.
Coolant Advice: Compressed air or light oil mist recommended. External flood coolant acceptable at lower feed rates.

Material Compatibility

Recommended Work Materials

6061-T6 Aluminium
303 Stainless Steel
Mild Steel (S235)
Brass CW614N

8×D Solid Carbide Drill — High-Rigidity Deep Drilling

Deep hole capable with peck drilling and high-pressure external coolant

8xD solid carbide drilldeep hole drill no coolant8D carbide drill steelpeck drilling solid carbide

Need Deeper Reach or Higher-Pressure Coolant?

ø4.00mm is also available as a Coolant-Thru drill (up to 25D) with internal twin channels.

Internal coolant-thru variant: OAL 75.00mm · L2 42.00mm (same 8D ratio)

View Coolant-Thru Version

Same Diameter, Different Reach

ø4.00 mm Also Available In

3D
3D
OAL 58.00mm · L2 24.00mm
5D
5D
OAL 66.00mm · L2 36.00mm

Same Depth Ratio, Adjacent Sizes

Nearby 8D Diameters

ø5.00
L2 50.00mm
OAL 90.00mm
ø6.00
L2 57.00mm
OAL 97.00mm
← All Solid Carbide Drillsø5.00mm 8D

Ready to Order ø4.00mm 8D Solid Carbide Drills?

Factory direct. MOQ 1 piece. Send us quantity and required delivery date — pricing confirmed within 4 business hours.

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