Quote Originally Posted by routercnc View Post
I'm not sure about SBR16UU type blocks having grease nipples. External features on the sides of these always look like grub screws to hold the bearing in place. I've not re-greased mine and they've been running fine for years.
No they don't have them :(, the side grub is for taking out any slop allowing you to preload them just right on the TBR units, they also have a locating grub in the top that I think is for locating the bearing unit it's self.

I thought about engineering up oil lines on too each housing, that would allow the oil to drip directly on to the top of the rail as it passes in to the bearing unit, though I thought for the effort it's probably not much of a job just to oil the rails as you need to manually...

.Me