Feathering leading edges of brake pads

[Athame57]

I've been told the need to do this might be why my brakes are squealing again days after doing a copper grease treatment. I've certainly heard of this but google isn't bringing up the answers I need and nor has the search on here. Can someone gently explain how I should go about this and try not to laugh? 

[Johnny4428]

Certainly worked for me on my 550, just removed pads and filed a small chamfer around the edge of the both pads.

[McCabe-Thiele (Ted)]

Whenever I fit brake pads if they are not supplied with a chamfer on the leading edge I just use a wide hand file and cut an angle on the leading edge.
If you look at the wheel rotation the leading edge is the first contact side - the other side of the pad is the trailing edge. I usually just take off the corner so as to speak.

Modern pads typically look like this - with motorcycle pads being much smaller in area you only need to angle the leading edge by 2 or 3 mm at around 30 deg if the squeal returns after a few thousand miles  repeat.

.modern pad by Macabe Thiele, on Flickr

[Athame57]

Thanks guys, I thought it would be something like this but I couldn't say I knew!