Drill Bit Wear Rate Calculator
Extract actual successive bit dimensional wear rates, signed apparent growth retained, not complete-bit lifetime or extrapolated linear retirement scenario. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.
Description
Bit wear can be tracked as diameter change over additional drilled length.
Bit wear can be tracked as diameter change over additional drilled length.1
A signed rate can reveal apparent growth as well as loss.
When to use Drill Bit Wear Rate Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
How to use Drill Bit Wear Rate Calculator and understand its results
- Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
- Enter observedDrilledLengthsM, observedBitDiametersMm, using the field meanings and rules below, then run the tool.
- Read observedSignedBitWearMmPerM. Inspect nested result fields where present, and review unknown records separately from known matches.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| observedDrilledLengthsM | Observed drilled lengths m | list of number | Required |
| observedBitDiametersMm | Observed bit diameters mm | list of number | Required |
Use at least two aligned nonnegative drilled lengths strictly increasing and positive bit diameters in millimetres. Return the negative diameter secant slope per interval in mm/m. An increasing diameter yields negative wear; no lifetime extrapolation is made.
wear_i=−ΔdiameterMm_i/ΔdrilledMetres_i Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| observedSignedBitWearMmPerM | Observed signed bit wear mm per m; preserve the subtraction order and sign defined in the mechanics | list of number |
{
"input": {
"observedDrilledLengthsM": [
0,
10,
30
],
"observedBitDiametersMm": [
100,
99,
97
]
},
"output": {
"observedSignedBitWearMmPerM": [
0.1,
0.1
]
}
}Limitations and assumptions
Units, ledger boundaries, survey interpretation and model applicability must be independently established. These summaries do not assign reserve/resource classifications or establish support adequacy, ventilation safety or an operating setting.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Lists and matrices must be dense, without missing cells. Numeric lists allow at most 10000 entries; ordinary string lists allow at most 128 strings of 128 UTF-16 units each; numeric matrices allow at most 128 rows and 128 columns, subject to narrower requirements above.
Alternative or Complementary methods
For a related step, use Reduction Ratio Calculator: A size-reduction ratio compares matched feed and product D80 measurements for overall comminution. For a complementary comparison, use Crushing Ratio Calculator: A size-reduction ratio compares matched feed and product D80 measurements for jaw crushing.
References
-
Drill Bit Wear Rate Calculator — tool.io
Similar or alternative tools
- Reduction Ratio Calculator
A size-reduction ratio compares matched feed and product D80 measurements for overall comminution.
- Crushing Ratio Calculator
A size-reduction ratio compares matched feed and product D80 measurements for jaw crushing.