Wheel bearing question

[KERRSURF]

I got new wheel bearings for Maggie's CRV and it they came with a card that when held to one side of each bearing it shows them to be magnetic.

Why would one side of a bearing be magnetic?
It may become apparent when I fit them but at the moment it seems strange.

[BUSHWHACKER]

ABS.
The magnetic side needs to be clean and facing the brake disc.

[andyverran]

ABS.
The magnetic side needs to be clean and facing the brake disc.

That's new one on me, why is that?

[KERRSURF]

Ah makes sense now!

The ABS has been acting up a bit lately, coming on at low speeds when the ground is a bit uneven, with the bearing having excess play this would account for that.

This forum is the dogs bollox.
Fankoo Vince.

[muddle]

Can do if the bearing is moving too much or if the old ring is moving at a different speed as it will have little magnetic points round it the the sensor reads

[muddle]

Also the magnetic side needs to face the cv joint not disc

[andyverran]

I may be a bit out of date, but 25 years ago *cough* when I knew stuff, the toothed ring for the ABS cut through a magnetic field at the sensor and induced 5 volts in it, those pulses told the brain how fast the wheel was moving. hence clearance to the sensor and it being clean were vital....

[muddle]

Correct but irrelevant in this type