Micro-Fine PTFE Powder
PTFE in a very fine powdered form, this product is a superior substitute for talc and other lubricants
commonly used on grand knuckles and keybeds. The knuckle is the single biggest source of friction in
the grand action. Despite graphite or polymer coatings on the repetition lever, friction levels often
remain high enough to adversely affect touch weight and cause squeaking. While dry lubricants such
as talc or One-Puff will work to some degree, none are as effective or long-lasting as the correct
grade of PTFE powder. After testing numerous types and grades of PTFE micro-powders, we found
this one to be optimum for piano applications. The average particle size is 3 microns. We package in
1 oz., 2.5 oz., 8 oz., and 20 oz. containers. (1 oz will treat about 12-15 sets of grand knuckles)
PTFE powder is especially valuable
when making touch weight
measurements on grand actions, since
it will typically reduce friction by
about 2 grams compared to other
lubricants, and virtually eliminates
the static friction (reluctance of the
action parts to start moving), so that
you no longer have to tap the bench
top to get the key moving when
measuring downweight or upweight.
Thus the job goes faster and your
measurements are more consistent.
Price: $9.00/1 oz, $17.50/2.5
oz, $34.00/8 oz, $70.00/20 oz.
Tip: Applying the powder to knuckles
This product should be applied to knuckles with a small, natural bristle brush. (Never rub it on with
fingers since skin oils can contaminate knuckle leather and potentially cause squeaking). A stencil
brush about 5" long as shown below is the best type we have found. The bristles are just the right
stiffness and hold enough powder to treat two octaves or so. These brushes are available at craft or
art supply stores.