RichLeimbach
Mechanical
- Oct 17, 2002
- 88
Trying to replace the grease in part of our system with a dry film lubricant. The application is for a ball bearing (chrome steel) running in a helical (Rc 60 D2 steel) track. The high pressure on the ball (~100ksi) and the twisting, scuffing motion at the contact patch causes the system to fail from an adhesive wear condition after only 3K cycles if run dry.
The current grease is a high-moly grease with 30% molybdenum content. It works well for over 1 million cycles, but is dirty and tends to contaminate other parts of the system. We would like ot replace it with a dry film lubricant of some type.
We've tried a number of options already TiN, WS2, MS2, but so far, the best we have tested has been Xylan (it got ~90K cycles before failure). Unfortunately we need life in excess of 250K cycles.
Any suggestions on coatings that might help get us to our bogey? All help is appreciated.
- Rich
The current grease is a high-moly grease with 30% molybdenum content. It works well for over 1 million cycles, but is dirty and tends to contaminate other parts of the system. We would like ot replace it with a dry film lubricant of some type.
We've tried a number of options already TiN, WS2, MS2, but so far, the best we have tested has been Xylan (it got ~90K cycles before failure). Unfortunately we need life in excess of 250K cycles.
Any suggestions on coatings that might help get us to our bogey? All help is appreciated.
- Rich
