QB/T 2442.2-1999 Pinch, twist and shear dual-purpose pliers Electrician's pliers QB/T2442.2-1999 Standard download decompression password: www.bzxz.net

QB/T2442.2—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 GB6295.2-1986 "Pliers and Cutters for Electricians" was changed to an industry standard (this standard was issued by the State Light Industry Bureau [19997112] and converted to QB/T3853.2-1999, the content is the same as before). This standard is based on the original national standard GB6295.2—1986, and refers to the international standard ISO5746:1988 "Pliers and Cutters - Dimensions and Test Values ​​of Wire Cutter and Electrician Pliers". The "A" and "B" classifications of the bending strength of the pliers handle in the original national standard are cancelled.
This standard will replace GB6295.2—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 under the jurisdiction of the National Tool Hardware Standardization Center. The responsible drafting unit of this standard is Shanghai Tool Industry Research Institute; participating drafting units include 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. 720
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Light Industry Standard of the People's Republic of China
Clip and Twist Pliers
Electrician's Pliers
This standard refers to the international standard ISO5746:1988 "Clip and Shear Pliers 1 Scope
This standard specifies the product classification, technical requirements and test methods of electrician's pliers. QB/T 2442.2--1999
Replaces QB/T 3853.2-1999
Dimensions and test numbers of wire cutters and electrician's pliers This standard applies to electrician's pliers. When there are special requirements for the product, it may not be restricted by this standard. 2 Referenced 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/T 6291-1999
Test methods for twist pliers and shearing pliers
3 Product classification
3.1 Type
The type of electrician's pliers is shown in Figure 1.
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Figure 1 Types of electrician's pliers
3.2 Basic dimensions
The basic dimensions of electrician's pliers are as specified in Table 1.
Basic dimensions
160±8
180±9
200±10
Note: If the user has other requirements for the dimensions, the two can be agreed upon Approved by the State Bureau of Light Industry on May 6, 1999
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Implemented on December 1, 1999
3.3 Marking examples
QB/T 2442.2--1999
The product marking shall consist of the product name, specification and standard number. Example of marking for 180mm electrician's pliers:
Electrician's pliers 180mmQB/T2442.2-1999
4 Technical requirements
4.1 Bending strength
The bending strength of electrician's pliers must comply with the provisions of Table 2, Table 2 Bending strength
4.2 Shearing performance
The shearing performance of electrician's pliers must comply with the provisions of Table 3. Table 3 Shearing performance
4.2.2 Electrician's pliers should be able to smoothly shear nonferrous metal wires. 3 Mouth gapbZxz.net
Cutting load F
Test wire diameter D
Permanent deformation Sma
Maximum shear force F
The maximum gap at the top of the mouth of electrician's pliers is shown in Figure 2. When the pliers handle is tightly gripped, the maximum gap is not greater than 0.4mm. Figure 2 Mouth gap
4.4 Other technical requirements
Other technical requirements for electrician's pliers shall comply with the provisions of GB/T6290. 5 Test methods
The test methods for electrician's pliers shall comply with the provisions of GB/T6291. 722
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