Retained fastenings for fixed guards

If you are build­ing machinery that will be CE marked or is sub­ject to the EU Machinery Directive, you need to read this art­icle at MachineBuilding​.net

This art­icle reviews some of the retained fasten­ings that are avail­able for use on fixed machine guards, as required by the new Machinery Directive 2006/​42/​EC and the guard­ing stand­ard EN 953:1997+A1:2009.

One of the changes in the new Machinery Directive is that the Essential Health and Safety Requirements (, fixed guards), states: “fix­ing sys­tems must remain attached to the guards or machinery when the guards are removed.” This new require­ment has also been added to the amended EN 953.

Various types of retained fasten­ing – such as cap­tive screws and quarter-​turn fasten­ers – are avail­able, but machine build­ers need to spe­cify these with care if they are to find the optim­um com­bin­a­tion of pur­chase cost, install­a­tion cost and ease of use. Also bear in mind the require­ment that “fixed guards must be fixed by sys­tems that can be opened or removed only with tools.” What fol­lows is a sum­mary of some of the products and sup­pli­ers oper­at­ing in this field.

Author: Doug Nix

+DougNix is Managing Director and Principal Consultant at Compliance InSight Consulting, Inc. ( in Kitchener, Ontario, and is Lead Author and Managing Editor of the Machinery Safety 101 blog.

Doug's work includes teaching machinery risk assessment techniques privately and through Conestoga College Institute of Technology and Advanced Learning in Kitchener, Ontario, as well as providing technical services and training programs to clients related to risk assessment, industrial machinery safety, safety-related control system integration and reliability, laser safety and regulatory conformity.

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