Linear Rail grease injection tool

These tools are for cleaning of and packing grease into a linear rail that doesn't have a grease port. They were specifically done for Voron v0 and Trident printer builds, but likely will fit other 7H, 9C, and 12H rails.

I printed them on a resin printer for use, but did try FDM as well with some success. 

For use, attach a syringe via a length of silicone tubing.  I used aquarium airline tubing and a 20ml syringe. Use care if cleaning the bearings with alcohol and wear proper safety protection, as fluid will spray out from the bearing under any pressure you apply. You can slide the bearing back and forth on the rail in order to clean along its length, as well as when injecting grease.  Note that you should allow the bearing to dry after cleaning and before injecting grease, as you don't really want to mix your cleaning fluid into the grease.

When transferring the bearing from its rail, use care to not dislodge any of the balls. Go slow and don't rush.

The hole and nut on the end are for an m3 bolt and nut.