Speeds and Feeds by HSMAdvisor (FSWizard)
Material: A-36 Hot Roll Steel 160-220 HB
Tool: 0.500in 4FL Carbide TiAlN coated Solid HP End Mill (WIDIA Metal Removal Maestro)
1" Stickout, 0.625 Flute Length
Speed: 528.0 SFM/ 4035.7 RPM
Feed: 0.0028 ipt/ 0.0114 ipr/ 46.00 ipm
Chip Thickness: 0.0028 in
Engagement:  DOC=0.250 in   WOC=0.500 in

Optimizing Peck Drilling for Deep Holes

Peck drilling is often necessary when machining deep holes. However, with the correct feed and speed settings, pecking is unnecessary for depths up to:

• 3× diameter for standard drills
• 5× diameter for high-performance parabolic drills

For deeper holes:

• Up to 10× diameter → Up to 5 pecks for regular drills, and up to 3 pecks for parabolic drills
• Beyond 10× diameter → Constant pecking is required:
  • 0.5–1× diameter per peck for regular drills
  • 1.5–2× diameter per peck for parabolic drills

Since programming requires specifying a peck amount, here are the recommended values:

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