tech talk
Learn more at www.igus.com/info/plain-plastic-bearings
Option 3: Machining and treatment of the housing hole
Even though machining/treatment has been covered, it should be mentioned again as a feasible option
for anti-rotation. Sometimes it can be cheaper to inspect the housing hole and make sure it is properly
tolerated. Typically, a regular H7 tolerated bore is enough. To increase press-fit even further, the surface
roughness of the hole can be intensified, or its size can be decreased. Users should be aware, though,
that tighter press-fits can lead to creeping in the material from mechanical tension, resulting in less
press-fit over time.
It does not always have to be tailor-made
In the end, solutions do not always have to be custom-made, which usually comes with added costs for
custom injection molds or setup costs. Some bearing manufacturers, like igus
®
, already have solutions
readily available in their catalogs. These are typically available from stock, and CAD-models can be
downloaded to fit them in designs more easily. This way, purchasing costs and costs for development
and design work can be cut.
There are countless ways to keep plain bearings from moving out or spinning out of control. It depends
on the application and environment to determine which solution is best. If further assistance is needed,
feel free to contact an expert.
Form-fit anti-rotation feature with pin on flange
Custom square design with protruding feature on flange
