National
Precision Bearing is proud to announce two new Spherical Plain and Rod
End Aerospace Bearing lines that reduce environmental impact through
advances in lubrication, materials, plating methods, linear systems and
production techniques. Beyond being simply a response to the
force of public opinion and governmental regulation these advances
realize superior real world performance. At NPB, we see the benefit of
Green Technology as environmentally friendly bearing production and
longer life expectancy, meaning a lower total cost of ownership.
Spherical Plain Bearings and Spherical Plain Rod Ends
are two of the most commonly used bearing components in aircraft
production and maintenance. Recently, the Society of Automotive
Engineers (SAE) published two new revisions to the Government
specifications for both Spherical Plain Bearings and Rod End Spherical
Plain Bearings. These revisions incorporate both material advances and
considerations for environmental impact that benefit the entire
Aerospace industry.
Spherical Plain Bearings
In response to advances in material technology the
SAE has published a revision to the Governing specification SAE-AS81820
for spherical plain bearings. It calls for a long life liner
system that lasts 100000 cycles compared to the existing standard 25000
cycles before requiring replacement. This liner system is denoted in
the part number by an “A” trailing the main specification as shown in
the table below. Parts meeting the new revision are dimensionally and
functionally equivalents except for their longer life:
| Original 25000 Cycle Specification |
New 100,000 Cycle Replacement |
| MS14101-() |
MS14101A-() |
| MS14102-() |
MS14102A-() |
| MS14103-() |
MS14103A-() |
| MS14104-() |
MS14104A-() |
Rod End Bearings
In an effort to reduce the use of harmful
chemicals, changes are being made to several specifications requiring
cadmium plating. The SAE has published a revision to the governing
specification SAE-AS81935 that calls for stainless steel material rather
than 52100 Chrome steel with Cadmium plating. The part numbers
indicating Stainless Steel Rod Ends are indicated in the table below.
Parts meeting the new revision are dimensionally and functionally
equivalent except for increased corrosion resistance:
| Original Cadmium Plated Specification |
New Stainless Steel Replacement |
| M81935/1-() |
M81935/6-() |
| M81935/2-() |
M81935/7-() |
| M81935/3-() |
M81935/8-() |
| M81935/4-() |
M81935/9-() |
National
Precision Bearing is excited to offer a full range of parts from both
of these specifications made by New Hampshire Ball Bearing, the only
manufacturer currently approved to supply both specifications.
To investigate incorporating these and other new Green Technology
products contact your NPB Technical sales specialist!
Article by: Melody Dazey, Aerospace Bearings Product Manager |
