[pianotech] Method for cutting balance rail bearings

[Mark Schecter]

Hi, Dave. HNY!

Instead of starting with half/round, what about starting with a trapezoid, top not parallel to bottom, high edge is your bearing. Mill a long stick like that, drill and slice. 

~ Mark Schecter

On Jan 2, 2012, at 5:52 PM, "David Love" <davidlovepianos at comcast.net> wrote:

> Attached is a crude drawing of a balance rail bearing.  I posted this
> question on the new list in response to something but ran into a road block
> trying to get this drawing posted along with it, at least easily.  I've been
> trying to figure out a way to produce this type of cut (the diagonal line
> represents the cut) uniformly on a set of balance rail bearings such that by
> turning them either with the cut facing forward or back you could change the
> action leverage easily and quickly.  Looking for production ideas.  The
> bearing would need to be cut and then probably covered with felt, although I
> suppose you could simply drop an unglued punching right down on top.  
> 
> Let me know what you think.
> 
> 
> David Love
> <cut bearing (2).jpg>