Shafts, bearings and circlips....

[m_c]

What John posted is what I'd call a snap ring.

Another option could be a flat snap/retaining ring. Think a circlip with a continual rectangular profile, which usually just have a notch in either end to help springn them apart.

[irving2008]

What John posted is what I'd call a snap ring.

Another option could be a flat snap/retaining ring. Think a circlip with a continual rectangular profile, which usually just have a notch in either end to help spring them apart.

The rectangular section ring works for me and is easier IMHO to machine the groove for.

Still wondering about use of Loctite to retain bearing outer race. If I go that route it can be 5mm mild steel plate with bearing pressed and glued in. If not it needs to be 8mm at least to make room for retaining lip and groove for snap ring. Plus two more accurate machining operations.

I'm trying to make this construct-able at low cost in the future.

[m_c]

How about make the plate 6mm thick, press fit the bearing, then peen/crimp the edges to ensure it remains secure?