GB/T 6481-2016Hollow hexagonal drill rods with taperd connection for rock drilling (English PDF)

1 Scope

This standard specifies the ordering content, specification code, shape and size, technical requirements, test of the hollow hexagonal drill rod with cone

Methods, inspection rules, packaging, signs and quality certificates.

This standard applies to the side of the nominal size of 19mm, 22mm, 25mm rock with a cone to connect hollow hexagonal drill rod.

2 normative reference documents

The following documents are indispensable for the application of this document. For dated references, only the dated edition applies to this article

Pieces. For undated references, the latest edition (including all modifications) applies to this document.

GB/T 230.1 Metallic materials - Rockwell hardness test - Part 1. Test methods (A, B, C, D, E, F, G, H, K, N, T) ruler)

GB/T 224 Determination of decarburization depth of steel

GB/T 1182 Geometrical Product Specifications (GPS) Geometric tolerances Shape, orientation, position and runout Tolerance

GB/T 1301 hollow steel for drilling rods

GB/T 2101 steel acceptance, packaging, marking and quality of the general provisions of the certificate

General technical requirements for delivery of steel and steel products GB/T 17505

3 order content

The contract or order ordered in accordance with this standard shall include the following.

a) Standard number;

b) product name;

c) specification code;

d) shape and size;

e) special requirements.

4 specification code

Product specification code by the H and drill rod tail handle to the nominal size of the composition, H for hexagonal (Hexagonal) of the English first letter, specifications

The code is shown in Table 1.

Table 1 Product specification code

Specification code tail handle to the nominal size/mm

H19 19

H22 22

H25 25 […]