S60 Brakes: Scraping noise when spinning rear disc/wheel

[ilmiont]

This seems like something basic which I can't reason through to my satisfaction.

I fitted new rear discs to lightly greased hub spigots, ensured they're flush, and installed the locating screw. When rotating the discs (or when rotating the finished assembly, wheels on, handbrake released, as shown below) there is a scraping sound for part of the motion, some of it is free though.

This shows up in a few of the how-to videos but with no explanation. Nobody addresses it or tries to resolve it so I have to assume it's acceptable but I want to know if it's something that could/should be alleviated. And I didn't think to spin the wheels before starting so I've not got a comparison.

+ YouTube Video

Is it the handbrake shoes dragging? I thought it was this, but backing off the nut didn't seem to change it; plus as you see in the video, with the handbrake released the wheel seems to keep rotating reasonably well once started by hand.

Feels like I've successfully changed the brakes and not been able to convince myself of something basic.

other cars


https://youtu.be/1t62t5vY_bA?t=721

https://youtu.be/LJc9rzj4hAo?t=2517