Guards and protective devices can be specially made to order according the customers needs, for example guards for carousel lathes, enclosures surrounding milling machines, closable doors which can be attached to the bed of a milling machine, sound proofing etc. Guards provide excellent protection for the machinist and keep the working environment clean. On request, the guard systems can be fitted with air filtering devices, touch-sensitive edges, access control systems, automatic doors, swarf removal systems, etc.