Replacing hammers in Schimmel 174 grand

[lluiscl]

Well, it has 30 years and its original hammers (Renner) need a new good ones. Which them? Ones from the factory (including shanks) are not an option due the budget. The original dimensions are (were, very hard) 78/70mm 11mm wide and, looking for, I have found two similar solutions: ones from Meyne (german, probably made by Abel) which are underfelt and impregnated with walnut molding; another from Renner (not impregnated, also underfelt) with white beech as molding. They have similar tail shape but I can't weight them... So I can surprise in the final key weight...
Any ideas? Anyone changed hammers in this piano?
All the best,
Lluís

[Silverwood Pianos]

Traditionally the mahogany and walnut moldings are somewhat lighter then the hornbeam. At times it is difficult to determine which hammers to use especially if the originals have received heavy use.

From my experience Abel gives a lot of felt weight to new sets of hammers especially in the extreme treble. There has to be a way to weigh them; digital scales can be found in many places and are not expensive.

Without a set of scales I don’t believe there is any other way to accomplish the task besides trial and error; getting some samples of the hammers you think would be matches for the original set and installing them and then checking your key weight. That would be a long process, as the action would have to be fully regulated in order to accurately determine the down/up weight.

[lluiscl]

Thanks a lot for your explanation.
Lucky I have found the solution this afternoon, directly from Louis-renner web. They have the hammer that I need bored for Schimmel. Mahogany is the molding.
All the best.

[Silverwood Pianos]

Very Good. Best of luck with the job.