ISO 7915:2021 Forestry machinery — Portable chain-saws — Determination of handle strength.
1 Scope
This document specifies a test method and strength requirements for the handles of portable hand-
held chain-saws for use primarily in forestry and tree-service.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 6531, Machinery for forestry — Portable chain-saws — Vocabulary
ISO 6533, Forestry machinery — Portable chain-saw front hand-guard — Dimensions and clearances
ISO 7914, Forestry machinery — Portable chain-saws — Minimum handle clearance and sizes
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 6531 apply.
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4 Test procedure
4.1 Test temperature
The test temperature shall be (20 ± 5) °C.
4.2 Test performance
The test shall he performed with the test loads specified in 4. The load shall he gradually applied until the test load is achieved in such a manner that there is no impact damage. When the load specified in 4 is obtained, hold the load for a duration of (4 ± 1) s. The test shall be completed within 1 mm.
4.3 Load application
4.3.1 General
The chain-saw handles shall be subjected to static loads as specified in Table 1. separately applied at both handles grip, in each of the six directions illustrated in Figure 1 or Figure 2 and as described in 43,..ISO 7915 pdf download.