Roller-bearing

A roller bearing can be built by modeling the inner race, outer race, and cylindrical rollers as separate parts and then assembling them. The races are made with grooves to guide the rollers, while the rollers are created as simple cylinders and evenly arranged using the circular pattern tool. After assembly, mates are applied to align the rollers correctly and allow smooth motion. This part is great for showing how roller bearings carry heavier loads than ball bearings while still reducing friction in rotating systems.