Aluminium profiles used in the construction of modern special-purpose machines and assembly and test equipment typically have a hard anodised surface. This has great advantages in terms of resistance to damage, but because the anodised layer is non-conducting, electrostatic build-up may be present in parts of the frame. MBS Item has now introduced ESD Standard Fastening Sets to the Line 5 (20x20 module), Line 6 (30x30 module) as well as Line-8 (40x40 module) systems.
These new fasteners have a yellow passivated layer for easy identification, and although almost identical in appearance to the existing Standard Fastening Sets, they are subtly different in one key dimension. They actually work by destroying an inconspicuous part of the anodised layer in the relevant profile as the fastener is tightened. Extensive tests have proved that continuity is maintained, guaranteeing a long term electrical connection.
The profile and fasteners may still be stripped down at a later date and re-used for other purposes, if desired, because the marks left by these fasteners are so small as to be almost invisible.
Where earth bonding is required as part of a safety circuit, then specially designed terminals and earthing straps are also available within the Item system range.