Workpiece & Challenge
Crankshafts are typically forged steel or ductile iron with high hardness and toughness. The most difficult operation is deep oil-hole drilling (often above 10xD), where chips can jam and exit quality can become unstable.
Automotive Crankshaft Oil-Hole Drilling
This case focuses on long-depth oil-hole machining on crankshafts, where stable chip evacuation, tool life, and hole quality are critical in mass production.
Recommended Process Strategy
Use customized solid carbide coolant-thru twist drills with MQL (minimum quantity lubrication) to improve chip evacuation stability, lower coolant and maintenance costs, and support cleaner production.
Tool Design Highlights
- Optimized flute geometry with wider chip pocket
- Polished flute for lower chip friction and smoother evacuation
- Specialized core design balancing rigidity and chip flow
- Arc-type flank + special chisel edge + curved cutting edge
- Fine-ground margin to reduce workpiece friction and wear
Case Images
Crankshaft
Crankshaft by our drills
Our drill design optimized for crankshaft
Process Data & Result Comparison
| Condition | N(RPM) | Vc(m/min) | Vf(mm/min) | Fn(mm/r) | Lifetime (holes) | Lifetime (meter) | Result |
|---|---|---|---|---|---|---|---|
| Before (Competitor) | S2800 | 70 | F616 | 0.22 | 800 Holes (unstable, easy to break) | 63m | - |
| After (KY TOOLS) | S2800 | 70 | F616 | 0.22 | 1720 Holes | 136m | 115% longer tool life. More consistent. Better value than comparable brands. |