coaledsweat wrote:The temperatures a boiler/stove operates at would consume the grease or have it run out shortly after the application.
The grate rollers are well shielded from the hottest parts of the boiler. Certainly no hotter than the ash container which is never to hot to touch. I use synthetic high temperature grease on the blower shaft pillow blocks. It doesn't run out and that shaft does get hot. Much hotter than the ash bucket. When I get the grease fitting installed that's the grease I'll try first. Hopefully the roller bearing shaft is not completely hardened and I'll be able to tap it for a grease fitting. I was just able to scratch it with a utility knife so I should be able to tap it.
I was told by Jeff at AHS that a press fit grease fitting can be installed directly in the hole.
Alternatively you can just use a fitting on your existing grease gun that will deliver grease into the hole. The fitting I have is just a steel tube with a rubber cone fit over it. The rubber cone provides sufficient sealing to allow grease to be pumped into the fitting. The bearings apparently have no seals because grease pumps in very easily.
I suspect that you could also use a product like a dry Teflon spray into the existing hole to lubricate the bearing.