QB/T 2442.3-1999 Pinch, twist and cut pliers, long nose pliers with blades QB/T2442.3-1999 Standard download decompression password: www.bzxz.net

QB/T2442.3--1999
This standard is based on the requirements of the State Administration of Quality and Technical Supervision to clean up and rectify national standards. The original national standard GB6295.3--1986 "Clip, twist and shear dual-purpose pliers with bladed long-nosed pliers" was changed to an industry standard (this standard was issued by the State Light Industry Bureau [19997112] and converted to QB/T3853.3-1999, the content is the same as before). This standard is based on the original national standard GB6295.3-1986, and is formulated with reference to the international standard ISO5745:1988 "Clip and shear pliers-Dimensions and test values ​​of pliers", and the "A" and "B" classifications of the bending strength and shearing force of the pliers handle in the original national standard are cancelled.
This standard will replace GB6295.3-1986 from the date of implementation. This standard is proposed by the Industry Management Department of the State Bureau of Light Industry. This standard is owned by the National Tool Hardware Standardization Center. The responsible drafting unit of this standard is Shanghai Tool Industry Research Institute, and the participating drafting units are Shandong Weifang Pliers Factory, Sichuan Mianyang Tool Factory and Anhui Tool General Factory.
The main drafters of this standard are Lin Meide, Cheng Yiping, Chen Anxin and Chen Fuqiang. 723
Light Industry Standard of the People's Republic of China
Pliers for both twisting and shearing
Long-nosed pliers with blades
QB/T 2442.3---1999
Replaces QB/T3853.3--1999
This standard refers to and adopts the international standard ISO5745:1988 "Twist pliers and shearing pliers-Twist pliers dimensions and test values". 1 Scope
This standard specifies the product classification, technical requirements and test methods of long-nosed pliers with blades. This standard applies to long-nosed pliers with blades. When there are special requirements for the product, it is not limited by this standard. 2
Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T6290—1999 General technical conditions for twist pliers and shearing pliers GB/T6291-1999 Test methods for twist pliers and shearing pliers 3 Product classification
3.1 TypebZxz.net
The type of bladed needle-nosed pliers is shown in Figure 1.
3.2 Basic dimensions
The basic dimensions of bladed needle-nosed pliers are specified in Table 1. Approved by the State Bureau of Light Industry on May 6, 1999
Type of long-nosed pliers with blades
Implemented on December 1, 1999
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125±6
140±7
160±8
180±9
200±10
QB/T2442.3-—1999
Basic dimensions
Note: If the user has other requirements for the dimensions, they can be determined through negotiation. 3.3 Marking example
The marking of the product should consist of the product name, specification and standard number. Example of marking for 200mm long-nosed pliers with blades:
QB/T2442.3—1999
Long-nosed pliers with blades 200mm
4 Technical requirements
Bending strength
The bending strength of long-nosed pliers with blades must comply with the provisions of Table 2. W.mx
Table 2 Bending strength
4.2 Shearing performance
The shearing performance of long-nosed pliers with blades must comply with the provisions of Table 3. Table 3 Shearing performance
Long-nosed pliers with blades should be able to smoothly shear non-ferrous metal wires. 4.2.2
Carrying F
Test wire diameter D
T2 max
Permanent deformation S max
Maximum shear force F
4.3 Mouth top gap
The maximum gap of the mouth top of the long-nosed pliers with blades is shown in Figure 2. When the pliers handle is held tightly, the maximum gap 3 within 3mm below the mouth should not be greater than 0.08mm.
4.4 Other technical requirements
QB/T2442.3-1999
Figure 2 Mouth top gap
Other technical requirements for long-nosed pliers with blades shall comply with the provisions of GB/T6290. Test method
The test method of long-nosed pliers with blades shall comply with the provisions of GB/T6291. 726
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