How can door rollers be securely held in place besides using through bolts?

Snap rings are effective devices used to secure door rollers in place, providing a reliable solution beyond the use of through bolts. When properly installed in a groove on the shaft or roller assembly, snap rings create a mechanical barrier that prevents the rollers from moving off their intended path. Their design allows for easy installation and removal, making them a practical choice for applications where maintenance or adjustments may be necessary.

Other methods, while viable in specific contexts, may not offer the same balance of strength, ease of use, and serviceability. For instance, lock nuts can provide a secured fit but require more space and may not be as effective in dynamic applications where movement occurs. Adhesives can offer strong bonding, but they do not allow for easy disassembly or adjustment, which can be critical in a door system. Welding can create a very strong joint, but it is permanent and does not allow for future adjustments or replacement of components, making it less ideal in this scenario.