Tolerance and fit test
Find your printer’s ideal clearance: a plate with holes from tight to loose, each numbered, and two pins at the exact size.
The number above each hole is the gap per side, in mm. Keep the first hole where the pin slides in without forcing.
Drop a file to see it here
Is your model too big for your bed?
SplitSTL cuts it into printable parts with dowels or magnets, ready-to-print plates and an assembly guide. Free preview, first export free.
Export
30-day pass
1-year pass
How it works
- Pick the shape and size of your pins or shafts.
- Set the gap range to test (for example 0.05 to 0.40 mm).
- Print the plate and pins, then try each hole.
FAQ
What clearance should I use for parts that fit together?
Often 0.10–0.20 mm per side in PLA on a well-tuned printer. This test gives the exact value for your machine and filament.
Why test round, square and hexagonal?
Round holes often come out smaller than designed; square and hexagonal shapes stop rotation. Test the shape you will use.
How do I use the result?
Enter the gap you found in the “Clearance” field of the SplitSTL splitter: every dowel in your splits will be the right size.