Published guides
A useful CNC estimate shows how its total was built. These guides cover cost estimation, CAD inputs and the decisions that still require manufacturing judgment:
- How to quote CNC parts step by step — from RFQ qualification and model checks to expected cost, selling price and quote review.
- What drives CNC machining cost — material, setup, run time, inspection and risk presented as separate inputs.
- How to calculate a machine hourly rate — a normal-capacity method with a calculator that runs locally in the browser.
- STEP vs STL for CNC quoting — solid-model and mesh differences, plus the limits of automated geometry extraction.
How to use these guides
The formulas are starting points, not a universal price list. Each shop must validate its own normal capacity, costs, process assumptions, tolerances, inspection plan and risk treatment. A STEP model does not replace the drawing or a manufacturability review.
For the current product scope, read how Kostira works.
Editorial standard
Each published guide answers one clear question, discloses material assumptions and links to its sources. Internal review means an audit by the Kostira team of sources, terminology and consistency with the product’s verified scope. It is not an independent expert review or a certification that the method is correct for a particular shop.
A CNC technologist and the person accountable for cost accounting in the shop should approve the method before it supports commercial decisions. Kostira does not publish customer data without permission.