Hi Mick,

Uneven wheel wear occurred anyway.

If a tram made flange squeal noises on straight track that was because one wheel on an axle was smaller than its mate.

If ignored too long, one flange became much thinner than the other.

The remedial action by the wheel grinder operator was called an 'overgrind'..

Regards,

> On 25 May 2017, at 7:08 pm, Mick Duncankitbuny@... [TramsDownUnder] TramsDownUnder@...> wrote:

>

> Gday Richard, All

>

> The problem with using abrasive brake blocks to get rid of flats is that

> the brake pressure on each wheel is rarely the same and therefore unequall

> wheel dia will result on the same axle

>

> Cheers, Mick

>

>> On 23/05/2017 2:34 PM, Richard Youltressteleg@... [TramsDownUnder] wrote:

>> A friend whose grandfather worked at ?Waverley Depot in Sydney said that this is a job he did.

>>

>> South Melbourne depot around 1990 got a batch of 'Ferrodo' brake shoes with a layer of carborundum glued to the face of the shoes.

>>

>> The experiment can't have been a success because no more were seen.

>>

>> Nevertheless those composition brake should would very slowly grind away minor flats, but not during just one shift.

>>

>> Regards,

>>

>

>