The Atlas Copco Wear Sleeve (often referred to as a Shaft Bushing) is a high-precision, hardened protective sleeve designed to provide a smooth, wear-resistant surface for the air-end’s main drive shaft oil seal. By acting as a sacrificial barrier, the wear sleeve prevents the high-speed rotating lip seal from grooving or damaging the expensive compressor shaft itself, which would otherwise lead to difficult-to-repair oil leaks. Manufactured from high-grade, corrosion-resistant steel and polished to a mirror finish, these genuine sleeves ensure a 100% leak-tight interface and significantly extend the service life of the air-end assembly. Replacing the wear sleeve alongside the oil seal during major overhauls is a standard best practice to maintain the mechanical integrity and lubrication efficiency of your Atlas Copco GA, GX, or GR series compressor.