The wear on this particular lobe seems quite strange, not setting an even pattern across the surface:
What’s also strange is the rust pitting on an otherwise low-milage tensioner. You would normally expect SKF to use higher quality materials. No country of manufacture is labeled onto this part. I’m wondering, if SKF has stepped away from manufacture, only to establish itself as a parts forwarding company, much like TRW has done. At first, I thought, rubber dust was simply clumping onto bare metal, initially suspecting poor rubber composites:
