BEARINGS
COATING BEARINGS
Lubricating and maintaining such lubrication is critical to the life
of the Bearing.A Bearing is designed to carry tremendous loads while also
being soft enough to allow small particles to “embed” in the Bearing
material.The various designs of Bearings all address these primary needs.
In addition, a Bearing is a sacrificial part ,in that it is easier and less expensive to replace Bearings due to wear,than to replace the Crankshaft.
HPT 1 is primarily designed as a Bearing coating.
In addition, a Bearing is a sacrificial part ,in that it is easier and less expensive to replace Bearings due to wear,than to replace the Crankshaft.
HPT 1 is primarily designed as a Bearing coating.
While the two terms can be and are to a great extent
interchangeable, when it comes to Bearings, the differences
are important. A Solid Film lubricant derives its name from
the resin film formed during curing. This film has greater
internal bond strenght than the bond to the substrate, in
this case, the Bearing. A Dry Film, on the other hand , has
a weaker internal bond than the bond to the substrate. When
these features are applied to a Bearing , the Dry Film is
superior. Since no coating is a 100% friction ,free material,
some pressure will be exerted against the coating. In a rota-
tional application , such as we are discussing , the coating
needs to be able to MINIMALLY flake away when such pressure
is reached. Otherwise, the coating can delaminate. HPT_1
functions in this manner. Generally particle size that can
be removed is under 1 micron.The coating is capable of with-
standing pressures in excess of 350,000 PSI while lubricating.
This is well beyond the strenght of the Bearing itself. As
pressureincreases the coating actually becomes more lubricious.
In addition HPT 1 is a “fluid retaining” material that actually
One of tha most important features of HPT 1 is its ability to maintain its full lubrication characteristics, even in extremely thin films, DFL_1 typically will be applied in a film thickness of from .007÷ to .025 mm . Obviously this would affect clearances when the film aproaches .0025 mm. After checking tha thickness, burnish with “Scotch Bright” or similar material until the film thickness is no more than .007 mm. During running the coating will burnish to a near 0 dimension. This characteristic allows the Bearing to be run with its normal installed clea- rence. Coatings that form a “harder” film will also reduce friction and provide a protective layer to the Bearing. However, as these coating begin to wear , clearences will open up. HPT 1 does not have this problem. Due to the above features , HPT 1 can extend the life of a Bearing while reducing friction,parti- cularly in instances where normal oil film failure could lead to Bearing failure.
One of tha most important features of HPT 1 is its ability to maintain its full lubrication characteristics, even in extremely thin films, DFL_1 typically will be applied in a film thickness of from .007÷ to .025 mm . Obviously this would affect clearances when the film aproaches .0025 mm. After checking tha thickness, burnish with “Scotch Bright” or similar material until the film thickness is no more than .007 mm. During running the coating will burnish to a near 0 dimension. This characteristic allows the Bearing to be run with its normal installed clea- rence. Coatings that form a “harder” film will also reduce friction and provide a protective layer to the Bearing. However, as these coating begin to wear , clearences will open up. HPT 1 does not have this problem. Due to the above features , HPT 1 can extend the life of a Bearing while reducing friction,parti- cularly in instances where normal oil film failure could lead to Bearing failure.