I used this to model a small prototype of a DIY roller system that I wanted to attach to my garage ceiling. serious rigorous testing or whatever but I can tell you they were pretty smooth and fitted very well to the end of the metal rod I bought.
π Wheels Manufacturing Ball Retainer Bag: Convenient Storage and Protection for Your Ball Retainers
6 Review
Linear Clamping Support Bearing by Sydien
4 Review
Bearing 608- ZZ1MC3E (8x22x7) NSK//80018
4 Review
Enhanced Performance Sydien SCS12UU Bearing Bushing Diameter for Precision Machinery
4 Review