Analyze · one STEP file
Wall thickness analysis for STEP files
See the wall thickness of your whole part at a glance — red where it is thin, blue where it is thick. Find the walls that will not fill and the sections that will sink, check them against a target, and send the map on as a PDF. It is free, it runs in your browser, and nothing is uploaded.
What it helps you catch
- Walls too thin to mould, cast, print or machine reliably.
- Thick sections that sink, warp, leave voids or add cooling time.
- Uneven walls — one region running much thicker or thinner than the rest, which is what warps a moulding.
- A supplier's or customer's part, checked in minutes before you quote or approve it.
How to use it
- 1
Open your part and pick Thickness
Drop a STEP file on the page, choose Analyze, then the Thickness map.
- 2
Choose how to measure
Ray measures straight across the wall, like a caliper — best for plate-like parts: enclosures, brackets, shells. Sphere measures the biggest ball that fits inside the part — best at rib and boss junctions, on organic shapes, and for finding thick sections.
- 3
Read the map
Red is thin, blue is thick. Hover anywhere for the exact thickness at that point, and click to pin readings you want to keep on screen.
- 4
Check against a target
Turn on Target Thickness, enter your minimum or maximum, and choose Show Thin or Show Thick. Everything that meets the target turns grey, so only the problem areas stay coloured.
- 5
Download the report
A PDF with the map from the front and from below, the figures, and the share of the part that misses your target.
Wall uniformity
The Uniformity map compares every spot with the part's own typical wall, rather than with a number in millimetres. Spots close to it are calm; spots much thinner or much thicker turn red, because uneven wall warps a part whichever way it is uneven. Beside the map: the part's typical wall, how thin and how thick it runs, and the biggest step between neighbouring sections — the place to look first.
What you get
- A colour map
The whole part, coloured by wall thickness, to turn and zoom.
- Exact readings
Hover for the thickness at any point, to a thousandth of a millimetre.
- The figures
The thinnest, thickest, median and average wall of the part.
- A report
The Wall Thickness Report: a PDF to attach to a quote request or a design review.
More maps of the same part
Analyze has more maps, each with its own guide:
- Draft
Which faces release from the mould, which need more draft, and where the parting line falls.
- Corners
Every sharp inside corner and tight fillet.
- Tool access
Which side a cutter can reach each face from.
- Fill
The order a mould fills from the gates you place.
Good to know
For very thin walls on a big part, set Resolution to Fine; for a quick look, Coarse. The part should be a closed solid — PartCheck says so when it is not, and treats the numbers as indicative.
Questions
Ray or Sphere — which should I use?
Ray for plate-like parts, where it reads like a caliper. Sphere for parts with bosses, rib junctions or organic shapes, and whenever you are hunting thick sections.
Why does the thickness jump at an inside corner?
With Ray, a reading at a corner runs across the corner rather than across a wall. Switch to Sphere for those areas.
Why does Sphere read thin right at an outside edge?
Right at an edge there is little room for the ball. PartCheck knows this and leaves those readings out of the figures.
What wall thickness should my part have?
It depends on the process and the material. The injection moulding guide lists the recommended range for each plastic, and the CNC guide the thinnest wall for each stock.
Is my file uploaded?
No. Everything runs in your browser. Nothing is sent anywhere, and there is no account to make.
Try it on a real part
The demo is a moulded enclosure lid in two revisions, drawn in CAD. It opens in the tool with no files needed — or open your own STEP files. Nothing is uploaded: the analysis runs in your browser.