# Machine bushings and spacers

They reduce friction and wear on moving components in high-temperature and demanding atmospheres.

Family: Mechanical applications

## Processes
- Dry sliding
- Self-lubrication
- Shaft guiding and support

## Challenges
- Wear from metal-to-metal friction
- Oil contamination
- Thermal deformation
- Seizing on dry start

## Advantages
- Low dry coefficient of friction
- Dimensional stability at temperature
- Does not require external lubrication
- Machinable to tight tolerances

## Limitations
- Oxidation in air at high temperature without protection
- Lower mechanical strength than structural metals
- Requires grade selection by load and environment

- [Applications](https://esgraf.com/en/applications)
- [Alternate](https://esgraf.com/aplicaciones/equipos-bujes-espaciadores)