25D · Carbide Coolant-Thru Drill · ø4.50mm
ø4.50 mm 25D Solid Carbide
Coolant-Thru Drill
The deepest ratio in the standard range. The 25D coolant-thru drill is specified for aerospace structural drilling, long-reach cooling holes in injection moulds, and medical implant manufacturing. Requires a high-pressure coolant system (≥60 bar) and a machining centre with minimal thermal growth. Custom geometries available on request.
Get Pricing & Stock
Reference price
$77.40
Ref. factory price (USD)
Based on rod stock cost as of 2026-03-31. Final quotation may differ.
ø4.50mm 25D Coolant Drill
SKU: SCD-CTD-25D-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) | 145.00 mm |
| Shank Diameter (D2 h6) | ø6.00 mm |
| Overall Length (L1) | 183.00 mm |
| Depth Ratio | 25D (25× 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 |
25D Dimensional Drawing
Where This Tool Excels
ø4.50mm 25D — recommended applications
- ▸ Precision electronics housings
- ▸ Medical device components
- ▸ Micro-feature aerospace parts
- ▸ Watch and optical instrument parts
Material Compatibility
Recommended Work Materials
25×D Maximum-Depth Coolant-Thru Drill
Maximum depth — aerospace, mould cooling, medical implants
Same Diameter, Different Reach
ø4.50 mm Also Available In
Same Depth Ratio, Adjacent Sizes
Nearby 25D Diameters
Ready to Order ø4.50mm 25D Coolant Drills?
Factory direct. MOQ 1 piece. Tell us quantity and delivery date — we'll confirm lead time and pricing within 4 business hours.