CNC tool holder runout tolerance specification. Get instant Number of Pecks, Peck Depth List, Total Cycle Time for your machining parameters.
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Request a Proposal →Peck drilling breaks a deep hole into incremental steps, retracting the drill after each peck to clear chips and allow coolant to reach the cutting edge. This is critical for holes deeper than 3× drill diameter.
Peck when hole depth exceeds 3× drill diameter, or when drilling materials that produce long stringy chips (aluminium, stainless 304). For shallow holes in chip-breaking materials like cast iron, continuous drilling is faster and fine.
G83 is the standard deep-hole peck drilling cycle. G73 is the high-speed peck cycle (chip-breaking without full retract). Use G83 for deep holes, G73 for medium-depth holes that need chip-breaking.
Too shallow: excessive cycle time and unnecessary retracts. Too deep: chip packing, drill wandering, poor coolant access, and increased thrust force. Start at 3× D and adjust based on chip evacuation.
Enter the total hole depth and drill diameter. The calculator recommends a peck depth, shows how many pecks are needed, and estimates the cycle time. Adjust based on material — reduce peck depth for challenging materials (titanium, Inconel).
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