AS 3710-1989

1 - AS 3710-1989 VIBRATION AN SHOCK-BALANCING MACHINES-ENCLOSURE AND OTHER SAFETY MEASURES
4 - PREFACE
4 - CONTENTS
5 - FOREWORD
6 - 1 SCOPE.
6 - 2 REFERENCED DOCUMENTS.
6 - 3 DEFINITIONS.
6 - 4 ACCIDENT PROBABILITY AND ITS EFFECT ON SAFETY MEASURES.
6 - 5 POSSIBLEHAZARDS AND PRECAUTIONARY MEASURES.
6 - 5.1 General.
6 - 5.2 Disengagement or failure of the end-drive coupling.
6 - 5.3 Operator becoming entangled in the belt-drive.
6 - 5.4 Axial rotor movement off the machine supports due to excessive axial thrust from skewed support rollers or windage.
6 - 5.5 Rotor lifting out of the machine’s open bearings.
6 - 5.6 Operator coming into contact with any part of the spinning rotor.
6 - 5.7 Small particles separating from the rotor during rotation.
7 - 5.8 Rotor component separating from the rotor during rotation.
7 - 5.9 Rotor or major components failing during high speed balancing or overspeed testing.
7 - 6 SAFETY BARRIERS AND ENCLOSURES.
7 - 7 SELECTION OF PROTECTION CLASSES.
7 - 8 REQUIREMENTS FOR PROTECTION CLASSES
7 - 8.1 Protection class O.
7 - 8.2 Protection class A.
7 - 8.3 Protection class B.
7 - 8.4 Protection class C.
11 - 8.5 Protection class D.
11 - 9 CLASS C ENCLOSURE SELECTION FOR GENERAL-PURPOSE MACHINES.
11 - 9.1 General.
11 - 9.2 Size of fragment.
11 - 9.3 Fragment shape and material.
11 - 9.4 Penetration potential of a fragment.
12 - 9.5 Selection of fragment severity factor.
12 - 9.6 Enclosure penetration resistance rating (PRR).
13 - 9.7 Verification test for enclosures.

Specifies requirements for enclosures and other safety measures used to minimize hazards associated with the operation of balancing machines under a variety of rotor and balancing conditions. It defines different classes of protection that enclosures and other protective features provide and describes the limits of applicability for each class of protection.

This Standard specifies requirements for enclosures and other safety measures used to minimize hazards associated with the operation of balancing machines under a variety of rotor and balancing conditions. It defines different classes of protection that enclosures and other protective features provide and describes the limits of applicability for each class of protection. Special enclosure features, such as noise reduction, windage reduction, and vacuum (which is required to spin certain rotors at the balancing speed), are not covered by this Standard.