GB/T 24760-2009Cast iron straight edges (English PDF)

1 Scope

This standard specifies the terms and definitions of cast iron flat feet, Types and basic parameters, requirements, and other test methods, marking and packaging.

This standard applies to the specification of 400mm ~ 6300mm, accuracy rating of 00,0,1 and two cast iron square feet (hereinafter referred to as

"Flat feet").

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent

Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research

Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.

GB/T 17163 dimensional measuring instruments - Basic terminology

GB/T 17164 dimensional measuring instruments - Product terms

3 Terms and Definitions

GB/T 17163, the terms and definitions GB/T 17164 in established apply to this standard.

4 Types and basic parameters

Supporting standard 4.1-foot level of the type shown in Figure 1, shown below in Figure E = 2/9 × 2 L is the best support distance, thereby determining the flat feet when being tested

Bearing position. Illustration illustration purposes only and does not indicate a detailed structure.

Figure 1 I shape, II type of shaped flat feet schematic

Figure 2 bridge type flat feet […]