Hammer filing

[nastassja]

Hello everybody,

I have a small k15 kawai upright that I bought last year, and I have already noticed some grooves in the hammers. I have been practising from 1-2 daily hours (sometimes more but not on an everyday basis). Is this normal? How deep should the grooves be before I consider having these hammers filed?
I wonder what is considered "heavy use" of a piano like mine, and whether a higher end model would have hammer felt that last longer. I know that hammer filing can be quite expensive and I wonder how often it has to be done.
Thank you!

[themaximillyan]

it is normal when in felt of hammer there are grooves. Their removal can be done by any male layman using a ladies nail file, sandpaper or heel file.
good luck,