Hole Pattern Drilling Time
Total drilling time for a pattern: holes × (drill time + retract + position).
On hole patterns the auxiliary seconds dominate: at 20 mm depth the drill cuts ~5 s but repositioning costs 3 more — 38% overhead. This is why pattern work justifies rapid-traverse upgrades and canned-cycle tuning more than faster drills.
Formula
Note: Catalog starting values only — always confirm against your tool maker's data sheet and cut a test part. Machine rigidity, coolant and workholding shift real-world numbers.
Total drilling time for a pattern: holes × (drill time + retract + position). A free cnc machining: speeds, feeds & tool wear tool — no sign-up, no upload, instant results in your browser.
About Hole Pattern Drilling Time
Hole Pattern Drilling Time computes the governing relationship t = N × (depth/vf + t_aux) live as you type. On hole patterns the auxiliary seconds dominate: at 20 mm depth the drill cuts ~5 s but repositioning costs 3 more — 38% overhead. This is why pattern work justifies rapid-traverse upgrades and canned-cycle tuning more than faster drills. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use Hole Pattern Drilling Time
- 1Enter your values — Number of holes, Hole depth, Plunge feed, Retract + position per hole (sensible defaults are pre-filled).
- 2Read the live results: Time per hole, Pattern total.
- 3Check the "with your numbers" line to see t = N × (depth/vf + t_aux) substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Hole Pattern Drilling Time?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula t = N × (depth/vf + t_aux) with authoritative sources cited on the page (Machinery's Handbook, 31st ed. — Speeds and Feeds; Kalpakjian & Schmid, Manufacturing Engineering and Technology, 7th ed., ch. 21)
- ✓On hole patterns the auxiliary seconds dominate: at 20 mm depth the drill cuts ~5 s but repositioning costs 3 more — 38% overhead.
- ✓SI ⇄ Imperial toggle converts your inputs in place, so you can work in the units your drawings use
Frequently asked questions
What formula does the hole pattern drilling time use?+
It evaluates t = N × (depth/vf + t_aux), exactly as published. Sources: Machinery's Handbook, 31st ed. — Speeds and Feeds; Kalpakjian & Schmid, Manufacturing Engineering and Technology, 7th ed., ch. 21. The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
On hole patterns the auxiliary seconds dominate: at 20 mm depth the drill cuts ~5 s but repositioning costs 3 more — 38% overhead. Catalog starting values only — always confirm against your tool maker's data sheet and cut a test part. Machine rigidity, coolant and workholding shift real-world numbers.
When is this calculator the right tool for the job?+
Total drilling time for a pattern: holes × (drill time + retract + position). A free cnc machining: speeds, feeds & tool wear tool. This is why pattern work justifies rapid-traverse upgrades and canned-cycle tuning more than faster drills. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Does it support both metric and imperial units?+
Yes — the SI ⇄ Imperial toggle converts the values already in the fields, preserving the physical quantity, so you can flip mid-calculation without re-entering anything.
Related Manufacturing tools
Spindle Speed Calculator — Aluminum 6061
Carbide starting RPM for milling Aluminum 6061: n = 1000·Vc/(π·D) with a handbook cutting speed preset.
● LiveSpindle Speed Calculator — Mild Steel 1018
Carbide starting RPM for milling Mild Steel 1018: n = 1000·Vc/(π·D) with a handbook cutting speed preset.
● LiveSpindle Speed Calculator — Stainless 304
Carbide starting RPM for milling Stainless 304: n = 1000·Vc/(π·D) with a handbook cutting speed preset.
● Live