608 Roller Bearing Inside Diameter Fit Test
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Range of "axle end" sizes for testing fitment of prints to the ID of the common 608 "roller skate" bearing.
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Model information
- Source
- Printables
- Category
- Mechanical Parts
- License
- Creative Commons — Attribution
The inside diameter of 608 bearings is nominally 8mm but between the manufacturing tolerances on cheaply made bearings and the variability of extruded plastic squish it can sometimes be difficult to dial in a print for an easy press-fit.
So I created a set of sized “axle end” test pieces to help identify the right size/scaling for printing press-fit features that mate to the ID of a 608 roller bearing. The provided sizes range from 7.5mm diameter to 8.5mm. Split ends offer some flex to help gauge a snug fit without getting a test piece locked onto your bearings.
Import the models from the 3mf file into your slicer of choice to get all 5 sizes with debossed sizing numbers in the bottom.
I've included my FreeCAD project file as well as a STEP file export to freely modify this model as you need or use them to build your own project.