1717 Possible to snap motor shaft from too large pinion?

Originally Posted by Arct1k

5mm shafts rarely break.

Side loads on the shaft normally cause bearing failure.

High RPM's will cause magnets to crack..

Can you explain what a side load is in detail.

[BrianG]

Originally Posted by anunaki

Can you explain what a side load is in detail.

If you set the spur/pinion mesh too tight, the shaft tends to "push" against the shaft bearing (especially the front one). Therefore, a constant load on a bearing spinning that fast can cause premature wear.