Ar last!!! Started my Gantry 3-Axis CNC Build

[routercnc]

Mike, Yes they do. Should have some grease nipples...(hehe) on the side. I like to use moly bearing grease for high load applications, this is commonly known as CVjoint grease too. Do not go crazy though so you can at least make an attempt to keep the rails clean of dust/grease gunk. Frequency depends on use, gut feel indication would be 1/month for occasional use, 1/week for heavy use.

R's

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. Where possible I think you would have to slide the relevant axis off the rails to smear some grease onto the balls and that involves quite a strip down. It wouldn't hurt to give them a very light smear of moly grease before assembly:


But Hiwin style blocks do have them and you can grease them if you can get to them, but you are not using that type: