Started by
Francisco
Member
Member
Dear Sir
Maestro, I am having problems with some hammers, which do not return immediately; from some tutorials I noticed that they have applied a liquid using sponge brushes. I would like to know what it is, where it can be obtained, and what it consists of, and whether in this case it can be replaced with normally available materials.
Thank you for your cooperation.
Ps. this defect was found after a thorough overhaul, and after a long period of the piano not being used-
Moderator
I take this opportunity to welcome you.
Using liquid lubricants is against all good sense.
In this case, the mechanics must be overhauled and one must check the friction that the pins cause in the "joints" of the mechanism, called capstans (forcole). Most likely, the relative humidity level is too high. And I hope that the previous intervention did not contribute to further damage. In fact, if precision work is carried out by replacing the pins and boring the bushings, according to certain rules, however, the problem should not recur. This is unless there is excessive humidity in the environment.
The use of liquid lubricants, over time, makes things worse. It has been found that Ballistol, a highly advertised liquid, over time, as it dries out, creates more friction. First and foremost, one must see if the bushings have been damaged.
What piano is it? Can we see some photos of the instrument, the action, and specifically the hammer rail?
If it is an upright, the pins are hidden and a sample disassembly is necessary to verify.
Depending on the condition of the hammers, one must see if it is worth changing the pins. It might be necessary and convenient to change the hammer, shank, hammer knob, and capstan.
A good technician will know how to evaluate what needs to be done.
What kind of "overhaul" was performed?
P.S. even a short video of the movement obstruction would be useful
