GB/T 4346-2008Machine tools - Manually operated self-centring chucks (English PDF)

Foreword

This standard replaces GB/T 4346.1-2002 Self-centring manually-operated chucks for machine tools - Part 1: Dimensions and specifications.

Compared with GB/T 4346.1-2002, the main changes in this standard are as follows:

-- The definitions of "base or master jaw" and "top jaw" are deleted (3.1 and 3.2 of the 2002 edition);

-- All parameters of the 800 mm specification are added (see Table 1 ~ Table 8 of this edition);

-- The specifications of 630 are adjusted: The D1 size in Table 2 is adjusted from 545 to 560, the D2 size is adjusted from 586 to 595, and the D3min size is adjusted from 240 to 260. In Table 4, the D3min size is adjusted from 250 to 350, and the Hmax size is adjusted from 270 to 200;

-- The static balance retains the original level II accuracy value with reference to Japanese standards (see 5.5.1 of this edition);

-- Sizes for interchangeability of two-piece jaws (tongue and groove type) are deleted (Figure 4 and Table 5 of the 2002 version);

-- The geometric accuracy inspection of chucks with two-piece jaws but without a top jaw is deleted (Appendix A of the 2002 version). Appendix A of this standard is an informative appendix.

1 Scope

This standard specifies the type and parameters, technical requirements, test methods, inspection rules, marking, and packaging of manually operated self-centring chucks (hereinafter referred to as chucks).

This standard is applicable to scroll three-jaw chucks, and it also can be used as a reference for other scroll chucks.

2 Normative reference documents

The provisions in the following documents become the provisions of this standard through reference in this standard. For the dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this standard, however, parties who reach an agreement based on this standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest editions of the referenced documents apply to this standard.

GB/T 5900.1-1997 Machine tools - Spindle noses and face plates - Sizes for interchangeability - Part 1: Type A (eqv ISO 702-1:1975)

GB/T 5900.2-1997 Machine tools - Spindle noses and face plates - Sizes for interchangeability - Part 2: Camlock type (eqv ISO 702-2:1975)

GB/T 5900.3-1997 Machine tools - Spindle noses and face plates - Sizes for interchangeability - Part 3: Bayonet type (eqv ISO 702-3:1975)

JB/T 3207-2005 Machine tool accessory - General specification for products packaging

JB/T 9935-1999 Machine tool accessory - Technic document compiled

ISO 3089:2005 Machine tools - Test conditions for self-centring, manually-operated chucks with one-piece jaws

ISO 3442-1:2005 Machine tools - Dimensions and geometric tests for self-centring chucks with two-piece jaws - Part 1: Manually operated chucks with tongue and groove type jaws

6 Test methods

7 Inspection rules

8 Marking and packaging

8.1 The chuck shall be marked with the manufacturer's name or trademark.

8.2 A chuck wrench and bolts for installing the chuck shall be supplied with the machine; a wrench for the jaw screws shall be provided with the two-piece jaw chuck.

8.3 Packaging shall comply with the regulations of JB/T 3207-2005.

8.4 Accompanying technical documents shall comply with the provisions of JB/T 9935-1999. […]