- Shaft recommended for use with DryLin® RJUM bearings - Material: Drawn aluminium AIMgSi0 5F22 - Linearity conforms to DIN EN574-3 - Hardness: 75HB - Hard anodised surface - Specific electric resistance: 4x1011Ohm mm2/m - Chemical resistance: 2 - Not compatible with linear ball bearings, see Z–A or Z-B shafts instead