Earth Science & Energy
Diamond Drill Rig Core Bit RPM & Penetration Rate Sizer
Calculate diamond drill rig core bit rpm & penetration rate using the stated engineering or scientific relationship and adjustable field inputs.
Preparing your result…
What this calculator does
Calculates Diamond Drill Rig Core Bit RPM & Penetration Rate Sizer using the formula verified against the cited source.
What your result means
An estimate from the inputs you enter, within the scope stated below — not advice.
Formula
Net penetration rate = hole advance ÷ net drilling time; core recovery % = 100 × core recovered ÷ advance
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- Inputs
- The values entered in the fields above
- • Net penetration rate=drilled advance/net drilling time. Express m/h or ft/h using matching units. This does not calculate drill rotational speed.
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • Core recovered length can differ from drilled advance when recovery is below100%. Use actual hole advance and define net drilling time; report core recovery separately. RPM selection needs bit diameter/type, formation and manufacturer operating limits, absent here.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Quick reference
| Scenario | Hole advance drilled (m) | Net drilling time (bit on bottom) (h) | Core recovered (m) | Net penetration rate |
|---|---|---|---|---|
| Worked example | 30 | 6 | 28.5 | 5 m/h |
| Half the amounts | 15 | 3 | 14.3 | 5 m/h |
| Double the amounts | 60 | 12 | 57 | 5 m/h |
Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.
Reviewed 2026-10-18 · Next review 2027-04-18
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