ISO 18808:2021 Agricultural tyres for construction machines

标准简介

标准截图

标准文档说明

标准部分原文

INTERNATIONAL STANDARD ISO 18808:2021(E)

Agricultural tyres for construction machines

1 Scope

This document specifies the designation, dimensions, approved rim contours, load ratings and reference speeds for agricultural tyres fitted to construction machines (e.g. backhoe loaders, small dumpers, loaders, excavators) operating on building sites under loading and transport conditions.

Tyres conforming to this document are identified by the suffix IND in the tyre size designation; code designated tyres can alternatively, in place of the suffix IND, be identified by the classification code R-4.

NOTE Agricultural tyres without the suffix IND in the tyre size designation or with a classification code differing from “R-4” are not part of this document. Code designated diagonal tyres (ply rating marked series) for agricultural tractors, trailers and machines are part of ISO 4251-1 and ISO 4251-2. Code designated radial tyres for agricultural tractors, trailers and machines are part of ISO 8664. Metric designated tyres for agricultural tractors, trailers and machines are part of ISO 7867-2. Tyres for forestry machines, identified by suffix LS, or classification code LS-x are part of ISO 18807.

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 4223-1:2017, Definitions of some terms used in the tyre industry — Part 1: Pneumatic tyres

3 Terms a nd definiti ons

For the purposes of this document, the terms and definitions given in ISO 4223-1 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://w ww. iso. org/o bp

— IEC Electropedia: available at http:// www. electropedia. org/ 3.1

cyclic haulage service

cycle where a machine self-loads or receives a load from loading equipment, transports it elsewhere and returns unloaded

Note 1 to entry: Transportation speeds remain low (on unimproved surfaces) or medium, and distances are short to medium, usually less than 1 km one way, and out of public roads.

3.2

loading cycle

cycle where a machine picks up material, moves it to deposit it into a haulage vehicle or other equipment (e.g. bin, conveyor) then returns empty

Note 1 to entry: Transportation speeds are low (up to 10 km/h) and distances are short, usually less than 76 m one way.

ISO 18808:2021(E)

3.3

load and carry

pick and carry

cycle where a machine picks up material, moves it a short distance to deposit it then returns empty

Note 1 to entry: Transportation speeds are low, up to 10 km/h and distances are short, usually less than 610 m one way over improved or unimproved surfaces.

3.4

drive away

condition where the machine moves from one site to another (e.g. jobsite to jobsite, jobsite to maintenance shop)

Note 1 to entry: The machine is in an empty condition.

4 Tyre designation and marking

4.1 General

The designation of the tyre shall be shown on its sidewall and shall include the details in 4.2 and 4.4. The designation of diagonal code-designated tyres also includes the marking of the ply rating (PR) (see 4.3). Tyre designation may also include those details given in 4.5.

4.2 Tyre size and construction code

4.2.1 General

Agricultural tyres for construction machines are designated by the nominal section width and aspect ratio (if applicable), tyre construction code and nominal rim diameter code. For designation, marking or size examples, see 4.6.

4.2.2 Nominal section width

The nominal section width may be expressed by a code (see details in ISO 4251-1 or ISO 8664) or in millimetres (see details in ISO 7867-1).

Code designated low-section-height tyres are identified by the suffix “L” after the nominal section width.

4.2.3 Nominal aspect ratio

The nominal aspect ratio shall be expressed as a percentage and shall be a multiple of 5.

4.2.4 Tyre construction code

The tyre construction code shall be as follows:

— a dash (–) or “D” for diagonal or bias construction;

— “B” for bias belted construction;

— “R” for radial construction; in addition, the word “RADIAL” may also appear on the tyre.

4.2.5 Nominal rim diameter code

For tyres mounted on 5° tapered rims, the nominal rim diameter shall be expressed by a code comprising two digits (e.g. 24). For tyres mounted on 15° tapered rims, the nominal rim diameter shall be expressed by a code ending in “.5” (e.g. 22.5).

网盘链接

百度网盘：https://pan.baidu.com/s/1bp25ba5G4CAIXjwZTw0XaA
提取码：m5pn