Fatigue Tester Procedures
By: Mitchell Blaine DuBose
Help Received: None. M. B. DuBose
1. From cabinet beneath tester, retrieve following items:
a. Test data book
b. New specimen
c. 100 grit sandpaper
2. Record number of cycles to failure from previous test and write in test data
book
3. Flip machine off switch to turn machine off
4. Remove old specimen using the following tools:
a. Use Allen wrench to remove top mounting brackets
b. Use box wrench to remove fasteners, washers, and nuts
c. NOTE: Do not hit the machine rod against the edge of the machine
5. Polish new specimen with sandpaper
a. Sand against the specimen longitudinally ONLY
b. Sand on both sides
6. Load new specimen:
a. Mount using the proper sides
b. Be sure curved parts are facing the same direction
c. Tighten down nuts and bolts without overtightening, in a diagonal
pattern
d. Be sure machine shaft is centered
7. Determine load from test book, go down 0.5lbs of that load
8. Set load on tester:
a. Untighten the bolt on the orange frame
b. Pull weight out to make pounds go up
c. Turn barrel until 0.5 marking in visible
d. Write new load in test data book
9. BE SURE MACHINE IS OFF BEFORE RESETTING
a. Puch wheel gently until click is heard
10. Put everything back in cabinet
11. Put on safety glasses if not done so already
12. Alert EVERYONE that the test will begin
13. Begin Test
14. Record number of cycles