A lightweight lever can help lower the stress of tuning. Your body will thank you!
The balance point of the lever being closer to the handle end requires less hand shifting while moving from pin to pin, speeding up your work.
A Big Head is Better
The head of the lever is where the action is. The small tapered threads of a traditional lever are a weak point.
These small threads can fail, and will allow the lever to flex significantly, no matter how stiff the rest of the lever is.
The CarbonTube head attachment uses much larger threads which are a fundamental feature allowing extreme stiffness and the resulting increase in precision.
More Control is Better
There seems to be a prevailing notion that shorter levers offer more control and better feel of the pin. We believe this notion is the result of experience with flexible levers. If your lever is flexible, then choking up or going to a shorter version could indeed provide more control. However, if you are using a long CarbonTube lever that is extremely stiff, then you will have MORE CONTROL than a short lever would provide.
Longer levers require less force to attain the required torque (see below).
Less force means less physical effort.
Less force means less "flagpoling" (bending tendency of tuning pin).
Longer levers require more translation of the handle for a given rotation of the pin. Conversely, for a given translation of the handle there will be less rotation of the pin. This gives you more control.
The 13" CarbonTube requires 3.3 lbs less effort!
The 13" CarbonTube provides at least 26% more Control!
Stiffer is Better
Less overshoot at transition to kinetic friction
Allows LONGER handle while maintaining adequate stiffness
Feel the tuning pin not the lever
As the applied force increases, eventually the static friction is overcome and the pin begins to rotate.
But when the pin begins to rotate the friction between the pin and pin block becomes sliding friction, which is less than static friction.
The "wind up" that is present in deflection of the tuning hammer instantly releases and rotates the pin more than the technician intended, resulting in....
Bigger is Better
Larger section for greater stiffness
Tube provides extreme stiffness for material used
Light Materials are Better
Allow largest sections for most stiffness
Allow practical wall thickness
Resulting tool is very lightweight
A given length of the Carbon Fiber tube shown above weighs about half as much as the same length of Steel bar, but the Carbon Fiber tube has about 25 times the bending stiffness of the Steel bar.
What About Titanium?
Titanium is a very strong metal. High strength Titanium can be almost as strong as high strength Steel, even though Titanium only weighs about 57% as much for the same size piece. Unfortunately the inherent material stiffness (Elastic Modulus) of Titanium is also only about 57% of steel. This means a given chunk of Titanium will sustain about the same force as the same size chunk of Steel, but the Titanium will deflect almost twice as much.
In order to have a Titanium shaft tuning lever that is the same stiffness as a Steel shaft, the Titanium shaft would have to be significantly larger in diameter.
What About Carbon Fiber?
Carbon Fiber Composite is a very strong material. The strength and stiffness of carbon fiber composite depends on the orientation of the carbon fiber filaments. The CarbonTube design uses a composite construction that has inherent material stiffness that is greater than aluminum in the bending direction.
The result is a lever that has about the same theoretical bending stiffness as the SuperTube aluminum version, but is smaller and lighter.
No Risk 30 Day Money Back Guarantee
If you purchase the CarbonTube Piano Tuning Lever and use it for up to 30 days, but are not convinced that it makes your job easier, then return the CarbonTube for a full refund of the purchase price. We do ask that you make an honest effort to actually use the CarbonTube for tuning several complete pianos before you make a decision, and that you keep it in reasonable condition.