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Bearing Test Results

1. ABRASION RESISTANCE TEST

Product Test Laboratory

bearing-test-results-image1

Test Conditions
Speed:…………………………… 900 RPM
Load:…………………………….. 25 psi (0,172 MPa) bearing load
Shaft:…………………………….. 300 SS shaft
Media:…………………………… 95% water, 5% silica sand
Temperature:…………………. all materials: 70ºF (21°C) ARTMHT at 250ºF (121°C)
in ethylene glycol
Duration:……………………….. 8 hour run time

TEST RESULTS – AT A GLANCE
AR® composites are less damaging to the shaft or shaft sleeve in abrasive media over traditional bearing materials such as cutlass rubber.

bearing-test-results-image1

2. DRY RUN TESTING

Test Conditions

Test fixture:……………………. Vertical bearing test rig
Speed:…………………………… 3600 RPM
Load:…………………………….. 10.2 psi (0,07 MPa) radial load
Shaft:…………………………….. 316 SS shaft, surface finish of approx. 50 Ra
Media:…………………………… Air
Temperature:…………………. Room temperature
Duration: ………………………. 2 minutes, 2 runs per material (standard .004″/0.1 mm and increased .008″/0.2 mm clearance)
Parameters:……………………. all bearings grooved (since utilized for abrasive conditions)

TEST RESULTS – AT A GLANCE
AR®1/ AR®HT: No change in cross section, inner diameter, or weight loss. Bearings and rod look practically new.

Thordon SXL: Grooves completely filled with excess material. If emptied weight loss values would clearly increase >1%.

Cutlass Rubber: Only for 20 seconds running

AR bearing materials proved to have good dry run capability. They resist abrasion from suspended solids and the embedding of sharp abrasive particles of excess material. Grooves remain unaffected and support cooling effect.

Pictures below show bearings and rods after two minutes of dry testing @ 1666 RPM.

bearing-test-results-image1



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