Selective securing of coiled thread
inserts, bearings etc. improved with Trib-Tool dry chemical treatment.
Trib-Technology uses a
friction enhancing agent applied in trace amounts with a Trib-Tool that
has the ability to improve frictional retention between metal parts. In situations where
parts may need to be disassembled a doubling of the dry friction level is often more than
adequate. This is conveniently achieved by rubbing one of the parts with a
TRIB-TOOL. For instance in the case of a spiral thread-insert, if the friction between the
tapped hole in Fig.1 and an insert is raised significantly above that between the insert
and bolt, there will be little risk of the insert unscrewing with the bolt. Likewise as
the friction between the outside of the bearing races in Fig.2 is increased it improves
the bearing retention. The essential requirement of these applications is that the
friction enhancing material stays where it is put and that it does not migrate and
interfere with any low friction operating surfaces nearby.
Selective surface treatment and control of friction is possible with our patented Trib-Tools. This carries a series of mildly abrasive pads that slowly releases the friction inducing chemical in trace amounts as the surface is gently rubbed. Therefore a Trib-Tool simultaneously cleans and treats the surface. The chemical is attracted to the cleaned surface by polar attraction where it is retained. As the oxide layer recovers the chemical becomes incorporated (absorbed) into the new surfaces, thus there is no risk of the friction inducing chemical migrating into unwanted areas. To activate the chemical the retaining oxide must be slightly disrupted which happens when lightly interfering parts are pushed together.
The actual level of friction depends on the contact pressure. At light contacts as with a slip fit no difference is seen due to Trib-Grip. A light press fit shows only a moderate increase (up to double). Whereas a regular press fit (ISO H7/p6) shows an increase of three or more times that of clean dry surfaces. Providing the surfaces are hard there will be no perceptible cold welding and the parts can be disassembled if a high enough force is applied. If only one surface is hard - as is the case with a bearing mounted in a nodular iron casting, this can also be disassemble without damage. If it is a soft steel or aluminium mount there may be a small amount of material transferred onto the bearing but it will disassemble. If both parts are soft there may be considerable material transfer and it might be quite difficult to disassemble without damage to the bearing or housing.
Unfortunately the process does not work for joins containing copper and its alloys like brass or bronze; or zinc; or flake cast iron, but it works for virtually all other common metals and their alloys, including dissimilar combinations.
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