Originally Posted By: Gary Allan
Quote:
bearing wear scare testers
Is this a person who plays a tape or recording of a knocking engine that's in sync with someone's engine and you see how afraid they get?
LOL, well it’s not exactly that simplistic. With out going into too much depth, the bearing tester has a ¼ horsepower Dayton motor that spins a bearing race via a belt drive. The bearing race is driven at 860 rpm. Then a separate bearing with a Rockwell rating of C-42 is positioned in arm that you lower onto the rotating bearing race, which has a Rockwell rating of C-56. The bearing race rotates in ¼ inch pool of a motor oil of your choice. Depending on how much leverage you put on the arm, you can cause the motor to stall out. According to the instructions, most oils will stall the motor at three to five pounds of leverage, which equates to 87 to 161 pounds of leverage force between the stationary bearing and the spinning bearing race. Then the stationary bearing with the C-42 hardness will have a wear scar to some varying degree based on how well the oil did or didn’t do; all of this in theory of course.
The claim with the MT-10 treatment is that when an amount of force is put on the lever to 25 pounds or more which equates to a total bearing-to-bearing force of 631 pounds or more, the drive motor continues to run without fail. They say the mixture was approximately 5% MT-10 to 10W-30 Pennzoil conventional motor oil.
Anyway, I’m not too concerned about the MT-10 treatment. However, I am kind of curious if the bearing tester has any validity when it comes to testing various brands and types of motor oils?
This tester also has a built in amp meter so you can watch how hard the motor is working electrically based on how much force is put on the leverage arm. The theory again is that if you have a good lubricating fluid in the bearing race reservoir, the drive motor will exert less electrical energy rated in amperage.
Anyway, just for fun, I am going to try and find new test bearings that match the hardness scales mentioned above and try some various oils in it to see if there is a range and repeatable results. So, I guess it’s all in good for being free?
BTW, thanks for the welcome. I’ve been a guest on this forum many times. Just never broke down and joined. It’s awesome to actually be posting something, cheers!
CompSyn