NS EN 381-1 : 1ED 1993

Cooperating organizations
National foreword
Foreword
0. Introduction
1. Scope
2. Normative references
3. Definitions
3.1 Chain saw
3.2 Resistance of cutting
3.3 Cut-through
3.4 Chain stopping time
3.5 Free-running stopping time
3.6 Threshold chain speed
3.7 Chain slipping
3.8 Clogging
3.9 Chain braking
3.10 Cutting line
4. Principles
5. Apparatus
5.1 Major components of test rig
5.2 Power unit and connecting device
5.3 Saw unit
5.4 Moment of inertia
5.5 Calibration pad mount
6. Calibration materials
6.1 Calibration pads
6.2 Control of calibration pads
6.3 Other calibration
7. Calibration of the test rig
7.1 Introduction
7.2 Starting up the rig
7.3 Free-running stopping time
7.4 Measurement of chain speed
7.5 Calibration with clogging material (pads)
Annex A (informative) Supplementary information on
calibration pads
Annex B (informative) Cutting in plastic bar
National annexes
NA (informative) Committees responsible
NB (informative) Cross-references

Specifies the test rig to be used to assess the resistance of personal protective equipment to cutting by hand-held chain saws. Coverage includes definitions, apparatus, calibration materials, and calibration of the test rig.