Phase One:  Initial Ring on Cylinder Testing Since the second phase of the test series involved a relatively complex, flight-like pivot and test  apparatus there was a desire to “start simple” and get some initial data on the candidate bonded film / bushing systems before resources were committed to the more elaborate, follow-on setup. Due to looming review dates and a desire to get the initial test series completed quickly the team investigated various bushing test resources at other facilities. Fortunately a preexisting developmental bushing test setup at NASA/Glenn Research Center (GRC) was located that could be slightly modified to complete the desired initial testing of the bushing / lubricant systems. The GRC team quickly reconfigured their setup and test samples were fabricated so that testing could begin.  The testing consisted of loading PTFE infused hard anodized 7075 rings & PTFE infused Ti6Al4V rings  against various bonded film coated stainless steel shafts to produce a projected bearing stress of approximately 6895 kPa (1000 psi). The test fixture rotated the coated shaft against the ring in a constant  dithering motion of ±2 degrees. Testing was performed in lab air at 40% relative humidity for the first 69  cycles then in a CO 2 purged glove box for the remainder of the 4200 total cycles (all at 23°C). Friction  torque was measured throughout the test so that coefficient of friction values could be calculated at the completion of testing. Three samples of each material combination were tested during the series. The summarized results of the GRC test series are listed in Table 1 [1]. Table 1:  Phase One Bushing Test Results Ring Material Shaft Material / Coating Mean Coefficient of  Friction for 3 Tests  Al 7075-T7351 with PTFE  hard anodized coating Stainless steel coated with MoS 2 based bonded film lubricant with  “phosphate-like” binder 0.084  std dev 0.028  Al 7075-T7351 with PTFE  hard anodized coating Stainless steel coated with PTFE  based bonded film lubricant with  “phosphate-like” binder 0.120  std dev 0.020  Al 7075-T7351 with PTFE  hard anodized coating Stainless steel coated with MoS 2 based bonded film lubricant with  silicate binder 0.139  std dev 0.054  Ti6Al4V with PTFE anodic  coatingStainless steel coated with MoS 2 based bonded film lubricant with  “phosphate-like” binder 0.070  std dev 0.031  Ti6Al4V with PTFE anodic  coatingStainless steel coated with PTFE  based bonded film lubricant with  “phosphate-like” binder 0.194  std dev 0.047  Ti6Al4V with PTFE anodic  coatingStainless steel coated with MoS 2 based bonded film lubricant with  silicate binder 0.145  std dev 0.005  Al 7075-T7351 with PTFE  hard anodized coating Bare stainless steel 0.266  std dev 0.070  Ti6Al4V with PTFE anodic coatingBare stainless steel 0.212  std dev 0.048  Phase Two:  Application Specific Bushing Testing Phase Two of the Bushing Test Series was designed to characterize bushing friction and wear behavior  in a flight-like pivot assembly over the expected mobility operational temperature range (-135°C to  +70°C). Several different bushing materials and coatings were tested during this test series to allow the  team to select the best combination for the flight mobility pivots based on data from a representative  pivot. Test Setup  84