LY/T 1346-2011Forestry machinery. Portable chain-saws. Determination of balance and maximum holding moment (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This Standard replaces LY/T 1346-1999 "Gasoline powered chain saws. Determination

of its balance". Compared with LY/T 1346-1999, the main technical changes in this

Standard are as follows:

- Change the standard's name from "Gasoline powered chain saws. Determination of

its balance" to "Forestry machinery - Portable chain-saws - Determination of balance

and maximum holding moment";

- Modify the content of Chapter 1 "Scope";

- Add the content of Chapter 2 "Normative references";

- Add the chain saw balance test requirements for tested chainsaw and test equipment

(see 4.1 of this Edition);

- Delete the determination of the balance of high and short chain saws in LY/T 1346-

1999;

- Add the test requirements for longitudinal balance of the front handle of forest

chain saws (see 4.2 of this Edition);

- Add the test requirements for longitudinal balance of the handle behind the pruning

chain saw (see 4.3 of this Edition);

- Add the test requirements for lateral balance of the handle behind the pruning chain

saw (see 4.4 of this Edition);

- Add the test requirements for determination of the maximum grip torque of the

handle after pruning chainsaw (see Chapter 5 of this Edition);

- Add Annex A "Example test report".

This Standard uses translation method to identically adopt the international standard

ISO 8334:2007 "Forestry machinery - Portable chainsaws - Determination of balance

and maximum holding moment".

This Standard has also made the following editorial changes:

- To conform to the usage habits of China, the unit of measurement of fuel in Annex

A "Example test report" is changed from "cm3" to "mL".

The Chinese document which has consistency with the international normative

reference in this Part is as follows:

Forestry machinery - Portable chain-saws - Determination

of balance and maximum holding moment

1 Scope

This Standard specifies a test method for the longitudinal and the lateral balance of

portable combustion engine hand-held chain-saws.

It also provides a test method for determining the maximum holding moment of tree

service chain-saws.

2 Normative references

The following referenced documents are indispensable for the application 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 hand-held chain-saws - Vocabulary

3 Terms and definitions

For the purposes of this document, the terms and definitions defined in ISO 6531 apply.

4 Determination of balance