Observed arrival · 2026-09-30
Unrival Tools: engineering calculations from the shop floor
A set of browser-based engineering tools for metal-cutting parameters, TRIZ trade-offs, risk analysis, and testable requirements.
- For
- Manufacturing and systems engineers doing shop-floor calculations
- Worth noticing
- RPN+ places ratings instead of multiplying them, making each rating combination distinct while weighting impact by construction.
Field notes
The metal-cutting optimizer works backward from the drawing’s surface-finish requirement, then calculates speed, removal rate, and spindle power while accounting for chip thinning and machine limits. The risk register saves work, freezes signed-off revisions, checks ratings against controls, and searches analyses; the site says model changes are recorded and builds stamped so results can be tied to a version. The maker lists ISO 513, 1302, and 1832 among the standards the tools use.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue