15D · Carbide Coolant-Thru Drill · ø8.50mm
ø8.50 mm 15D Solid Carbide
Coolant-Thru Drill
At 15× diameter, this drill enters territory typically reserved for gun drills or BTA deep-hole systems — but at a fraction of the setup complexity. Purpose-engineered for crankshaft oil passages, long tie bolts, and heat-exchanger tube sheets. Full-diameter internal coolant delivery is mandatory.
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Reference price
$185.55
Ref. factory price (USD)
Based on rod stock cost as of 2026-03-31. Final quotation may differ.
ø8.50mm 15D Coolant Drill
SKU: SCD-CTD-15D-D850
✓ Factory direct pricing
✓ MOQ 1 piece, stock sizes ship 1–5 days
✓ Custom lengths & diameters available
Full Dimensions
Technical Specifications
| Cutter Diameter (D1 h7) | ø8.50 mm |
| Imperial Equivalent | 0.3346" |
| Flute Length (L2) | 160.00 mm |
| Shank Diameter (D2 h6) | ø10.00 mm |
| Overall Length (L1) | 204.00 mm |
| Depth Ratio | 15D (15× 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 |
15D Dimensional Drawing
Where This Tool Excels
ø8.50mm 15D — recommended applications
- ▸ Engine block water jackets
- ▸ Flange bolt-hole patterns
- ▸ Pump housing bore features
- ▸ Railway component deep holes
Material Compatibility
Recommended Work Materials
15×D Ultra-Deep Coolant-Thru Drill
Ultra deep — crankshaft passages, long tie bolts, heat exchangers
Same Diameter, Different Reach
ø8.50 mm Also Available In
Same Depth Ratio, Adjacent Sizes
Nearby 15D Diameters
Ready to Order ø8.50mm 15D Coolant Drills?
Factory direct. MOQ 1 piece. Tell us quantity and delivery date — we'll confirm lead time and pricing within 4 business hours.