20D · Carbide Coolant-Thru Drill · ø4.50mm
ø4.50 mm 20D Solid Carbide
Coolant-Thru Drill
The 20D coolant-thru drill replaces two-step gun-drilling in many automotive and power-generation applications. Suitable for hardened steel (up to HRC 40) and nickel alloys when combined with the correct Balzers PVD coating. Machine spindle runout must be within 0.005mm for consistent tool life.
Get Pricing & Stock
Reference price
$65.47
Ref. factory price (USD)
Based on rod stock cost as of 2026-03-31. Final quotation may differ.
ø4.50mm 20D Coolant Drill
SKU: SCD-CTD-20D-D450
✓ Factory direct pricing
✓ MOQ 1 piece, stock sizes ship 1–5 days
✓ Custom lengths & diameters available
Full Dimensions
Technical Specifications
| Cutter Diameter (D1 h7) | ø4.50 mm |
| Imperial Equivalent | 0.1772" |
| Flute Length (L2) | 118.00 mm |
| Shank Diameter (D2 h6) | ø6.00 mm |
| Overall Length (L1) | 158.00 mm |
| Depth Ratio | 20D (20× diameter) |
| Point Angle | 140° |
| Helix Angle | 30° |
| Number of Flutes | 2 |
| Coating | TiAlN / TiSiN Oerlikon Balzers BALINIT® |
| Substrate | K10/K20 Solid Carbide 10% Co binder |
| Coolant | Internal twin-channel |
| Tolerance | DIN 1414 · ISO 5419 |
| MOQ | 1 piece |
| Lead Time (standard) | 1–5 business days |
| Lead Time (custom) | 5–15 business days |
20D Dimensional Drawing
Where This Tool Excels
ø4.50mm 20D — recommended applications
- ▸ Precision electronics housings
- ▸ Medical device components
- ▸ Micro-feature aerospace parts
- ▸ Watch and optical instrument parts
Material Compatibility
Recommended Work Materials
20×D Precision Deep-Hole Coolant-Thru Drill
Precision deep hole — hardened steel, nickel alloys, power generation
Same Diameter, Different Reach
ø4.50 mm Also Available In
Same Depth Ratio, Adjacent Sizes
Nearby 20D Diameters
Ready to Order ø4.50mm 20D Coolant Drills?
Factory direct. MOQ 1 piece. Tell us quantity and delivery date — we'll confirm lead time and pricing within 4 business hours.