Is my disc rotator bent?

[cwah]

I tried many times to fixe my brake but it seems to be always squeaking whatever I do.

I'm now wondering if my disc rotator is bent:
[video=youtube;h2ev6KqoX-s]http://www.youtube.com/watch?v=h2ev6KqoX-s[/video]

Any thought?

 

[NRG]

You may have to remove it and lay it on a completely flat surface to be sure but it does look to wobble in your vid....

 

[oigoi]

Looks bent to me. I would remove the brake caliper and try and bend it back to straight again. This will take a bit of trial and error.

It is most likely the disc is bent but there are other possibilities - is it mounted onto the hub correctly? Is the hub flange straight where the disc bolts onto it?

 

[catsnapper]

Certainly looks a bit bent, but not as bad as many I see It's hard to judge because of the camera angle, but the disc looks very close to the caliper.
I know they are often supposed to be offset according to manufacturers instructions, but it's usually possible to set the calipers to work correctly with some wobble in the disc.

 

[Oxygen Bicycles]

it looks bent to me but I would n't worry too much. You can bent it back, just find out the place where it bent, brake calipper it's the best check point and you can see the rotor getting closer to the pads. Once you locate it pull the wheel back and bend it with your hand in the opossite direction. Be careful and don't bend it too much. You can also use a rubber mallet to do that, I used to do it very often.

all the best

Andrew

 

[cwah]

Andrew, thanks for this very insightful comment. It seems so simple why didn't I think about it?

I'm going to use a wrench or a plier to bend it to the right direction, rather than using my hand. I don't think I'll remove the wheel because the motor is on the same place. Will certainly try to do it tomorrow.

ps: oigoi - How do I know if the disc rotor is mounted to the hub correctly?

 

[oigoi]

Have a look at how the disc is fitted to the hub - how is it held on to the hub? (bolts?) see if you wiggle the disc is it fitted securely to the hub or is it loose at all?

It is more likely that the disc itself is bent it's just worth checking it's fitted to the hub properly.