Wear condition of the internal gear shaft in the reducer
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I would like to ask what type of wear this is What caused it?
The keyway has been ground in this way; what is this keyway used for?
The issue is caused by a gap in the keyway; if the fit between the key and the slot is proper, then there is a problem with the shaft material.
Is it only the worn part that has gears? ? Why are the keyways so long? Short keys for long keyways? It’s probably the gap between the key and the keyway that causes a loose fit.
The internal keyways of the gears and the shaft keyways, as well as the clearance between the gear holes and the shaft, are out of specification; this leads to loosening, localized overheating, discoloration, and wear. For components that are not frequently disassembled and assembled, an interference fit or a transition fit can be used; in most cases, H7/r6 or H7/n6 is chosen
What about the inside of the gear hole? Is there any wear?
I can only learn silently* a bit; I don’t have much exposure to it