- #1
YoshiMoshi
- 236
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- TL;DR Summary
- Over Grease?
Hi,
Sorry if this is a stupid question, but I haven't taken fluid mechanics classes and mechanical engineering ones.
I understand that sometimes bearings get "dry" and you can regrease them. However I did some searching online and found that it's possible to over grease a bearing which can cause issues? Is this true in the automotive industry? I'm talking bearings that are not soaked in oil but need grease. For example ball joints, wheel bearings or pulley bearings.
If it's possible to over grease them, and you should just buy them when they get dry, then why do bearing packer tools exist for the purpose of adding grease to bearings? Moreover, if you should only have 20%-30% of the bearing cavity full of grease, then why do these bearing packing tools seems to 100% fill the bearing with grease?
I've even see the cone type packing tool that allows you to add grease into a bearing without even removing the seal.
This got me thinking. Is it possible to add grease to a sealed bearing without having to remove it from the car? Or has this tool or fastener still need to be invented? I see the cone packing tool is basically a threaded rod with a hole that goes all the way through it, then a hole on the side to let the grease out.
Sorry if this is a stupid question, but I haven't taken fluid mechanics classes and mechanical engineering ones.
I understand that sometimes bearings get "dry" and you can regrease them. However I did some searching online and found that it's possible to over grease a bearing which can cause issues? Is this true in the automotive industry? I'm talking bearings that are not soaked in oil but need grease. For example ball joints, wheel bearings or pulley bearings.
If it's possible to over grease them, and you should just buy them when they get dry, then why do bearing packer tools exist for the purpose of adding grease to bearings? Moreover, if you should only have 20%-30% of the bearing cavity full of grease, then why do these bearing packing tools seems to 100% fill the bearing with grease?
I've even see the cone type packing tool that allows you to add grease into a bearing without even removing the seal.
This got me thinking. Is it possible to add grease to a sealed bearing without having to remove it from the car? Or has this tool or fastener still need to be invented? I see the cone packing tool is basically a threaded rod with a hole that goes all the way through it, then a hole on the side to let the grease out.