perma USA - Sales & Support - FAQ
If a bearing has two grease fittings, which one does the perma go on?
Answer
The main lubrication point is the fitting in the middle part of the bearing. This is where the main perma should be installed. Normally the second fitting is used to lubricate the seal. On this point, we usually drop down 2 units than the main lube point has. That is, if the main lube point has a perma 1, then we use a perma 6 on the seal. Sometimes a bearing has two "main lube" points in the middle of the bearing. If you look at the bearing from the side, much as you would a clock, the points are normally at 10 o’clock and 2 o’clock. If the bearing is running clockwise, as most do, the perma needs to be installed at the 10 o’clock position so the grease can get in properly. At the 2 o’clock position, the back pressure from the bearing may keep the grease out of the bearing.
