Hi folks
So, I wanted to post my findings here, because I did a lot of hunting online for answers and very few helpful results are out there.
I upgraded my gooseneck lever finally (I've only been tuning 4 or 5 years) - and yea, I went with the classic rosewood Schaff hammer. I see today rigidity over weight is at the forefront of lever tech. I'm still establishing myself and I have tuners in my family back 2 generations that used them and I guess I still like the look and feel.. for now
Anyway, I had a really mixed bag when I got it shipped. I was amazed at the quality of machining of the handle and collet. The hex shaft stuck out a goofy amount from the handle, so I machined it shorter so the business end was better balanced. The head.. they're not plated, the stamping was off and there were a decent number of burrs but once I took care of those they're quite nice.
The tips look to be softly machined. I got a number 3 for this but I have a 2 here as well. I could still rock the lever a decent amount back and forth on a properly sized pin, it's hard to describe but I just didn't feel like I had good control.
In come the many posts about Watanabe tips! I see they're compatible with a lot of carbon fiber hammers, beautiful ones from Faulk, etc. but the classic Schaff heads are different. I even remember reading detailed posts with thread pitch measurements because their diameters are different. (Schaff told me they were metric, and Pianotek just said they're not but companies use proprietary threads, so buy at your own risk!)
I have a background in machining and movie prop replica work so I really get this. However someone posted (maybe on this site) that a W tip would be loose on a S head.
I just did it this afternoon. I have a #2 Watanabe tip and a 13G 15 degree Schaff head, made very recently. I hand threaded the tip and it got stuck after 1 turn. Seriously, either the Schaff head is too big or the Watanabe tip is smaller. Well, I got an extra Schaff head to try this out so it was "disposable" to me so I used my knowledge from other industries to see what would happen. If they were the same thread pitch, I'd either ruin them/get them stuck together or they just wouldn't move in the first place because the material is already there. I applied 3-in-1 lubricant oil and used a tip wrench to see what would happen. I.... I think I re-tapped the threads.
With some force the Watanabe tip smoothly spiraled onto the Schaff head, and it felt exactly like when I tap a hole with RapidTap. I backed it off a couple times just to check, and they are compatible now. The Watanable tip seats very flush with the head, leaving only a tight line like this old Hale speed hammer I have lying around, the Schaff heads are a little rounded at the back.
So.. if anyone is curious, my experience is that it technically works and you might ruin the head... but most likely you won't. I don't know which part has the harder material but it's on there, you most likely will slowly cut new threads and it won't come off easily. I do notice a significant difference with Watanabe tips, they seat a little tighter and look like they are a bit sharper machined. I really like the feel.
I didn't look into Watanabe heads, but I had trouble even finding one with the 15 degree head I like
Thanks for coming to my "ted talk" haha
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Tom Delmonte
Buffalo, NY
t.delmonte9@gmail.com------------------------------