A grease-filled ball bearing on an oven-door latch seizes and keeps the door from latching. It turns out the +550 F oven temperatures over time had solidified the grease. The ball bearing was eventually replaced with a graphite-metal solid bearing and the problem went away.
Graphite-metal alloy bushings can survive temperatures to 1,000°F (or higher in non-oxidizing environments), beyond the range of liquid and solid lubricants such as PTFE and molydisulfide, and above the melt point of polymer bearings. They also work at cryogenic temperatures down to -450°F. Self-lubricating graphite-metal alloy bushings are recommended for applications with:
Download now to learn more, including finding out when using graphite-metal alloy bushings makes the most sense.
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