pma mount lower bearings

hi everyone, I was asked what I use for a lower mount pivot bearing on my smaller mills. many sites are selling the needle bearings, every time iv tried one it failed in a month or less. I use bearing # 51110 , and a pipe plug cap over the bearing to protect it from the weather. the pipe plug caps can be found at any hydrolic repair shop. cut the inside to fit over the pipe, tight fit is preferred. grease the bearing with extream low temp grease and place the pipe plug over the bearing and reinstall the pma. I have two in use now and one has 2 years on it and has never been touched since installed and works fine. these are cheap on ebay 5$ give or take and work way better than the needle bearings. smoth spinning everyone. thanks for reading.