Manufacturing marks or wear?

[Ruairidh Dunford]

I have seen similar but not as pronounced, anybody know what for sure?

   

[Mike Costigan]

I don't know for sure, but that looks like machining marks made during manufacture. I cannot see how it could be wear related.

[AllAlloyCup]

Hi Ruairidh
Have you counted them and perhaps they
Match with the gear teeth?

If so perhaps the gear cutter was having a fag?

Bill G

[mk1-mark]

They look like Broach marks where the gear cutting broach has been allowed to over run slightly.  Not very attractive, but nothing to worry about.

[JohnD]

I noticed these on the Cup's clutch last week, they were not all the way around tho, only on the one side, i will try and get a photograph tonight before i put the box on.

[Ruairidh Dunford]

The markings look fresh compared to the rest of the plate...

[Reckless Rat]

Looking at the striations and shape of the marks they appear to be identical and relate to the number of splines on the shaft - is there a gap where the blind spline should be? They do look recent but that might just be a trick of the light. You've not been cleaning the splines up with a 9" angle grinder have you?

[Steve Bryant]

The markings look fresh compared to the rest of the plate...

They're definitely are not the same age colour as the rest of the metal, so would suggest wear.
Stephen

[Chris KC]

I'm struggling to imagine what could cause a wear pattern like this. I'm with reckless, looks like someone has tried to clean up the splines with an angle grinder...

[Speedex750]

Are the marks in line with the teeth or the valley between? Could the clutch plate come back far enough to chatter against the gearbox primary splines?