QB/T 2440.2-1999 Twist-off pliers, flat-nose pliers

QB/T 2440.2-1999 Twist Pliers Flat Nose Pliers QB/T2440.2-1999 Standard Download Decompression Password: www.bzxz.net

QB/T2440.2-1999
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 GB6293.2-1986 "Twist Pliers and Flat Nose Pliers" was changed to an industry standard (this standard was issued by the National Light Industry Bureau [19991112 Document] and converted to QB/T3851.2--1999, the content is the same as before). This standard is based on the original national standard GB6293.2--1986, and refers to the international standard ISO5745:1988 "Twist Pliers and Shearing Pliers-Twist Pliers Dimensions and Test Values", and cancels the "A" and "B" classification of the bending strength of the pliers handle in the original national standard. From the date of implementation, this standard will replace GB6293.2-1986. 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 are Beijing Telecom Tool Factory, Jiangsu Jinlu Group Corporation, Zhangjiagang Zhongxin Hardware Tools Co., Ltd., etc. The main drafters of this standard are Lin Meide, Wang Rujie, Shao Xuehai, Huang Yongxiang. 698
Light Industry Standard of the People's Republic of China
Twist Pliers
Flat Nose Pliers
QB/T 2440.2--1999
Replaces QB/T3851.2-1999
This standard refers to the international standard ISO5745:1988 "Twist Pliers and Shear Pliers Twist Pliers Dimensions and Test Values". 1 Model drawing
This standard specifies the product classification, technical requirements and test methods of flat nose pliers. This standard applies to flat nose pliers. When there are special requirements for the product, it is not limited by this standard. 2 Reference 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 Test methods for twist pliers and shearing pliers
GB/T 6291-1999
3 Product classification
The type of side-mouth pliers is shown in Figure 1.
Figure 1 Type of flat-mouth pliers
3.2 Basic dimensions
The basic dimensions of side-mouth pliers are as specified in Table 1.
Approved by the State Bureau of Light Industry on May 6, 1999
Implemented on December 1, 1999
125±6
140±7
160±8
125±6
140±7
160±8
180±9
200±9bzxZ.net
1 Those with Wx less than 1.5mm are thin fan pliers.
QB/T 2440.2--1999
2 If the user has other requirements for the size, it can be determined by agreement. 3.3 Marking example
Basic size
The marking of the product should consist of the product name, specification and standard number. Marking example of 140mm flat nose pliers:
Flat nose pliers 140mm QB/T 2440.2--1999.4 Technical requirements
Bending strength
The bending strength of flat nose pliers must comply with the provisions of Table 2. Table 2 Bending strength
4.2 Torque
The torque of flat nose pliers must comply with the provisions of Table 3. 700
Load F
Permanent deformation Smax
Note: This test is not performed on thin flat mouths.
4.3 Mouth top gap
QB/T 2440.2--1999
Table 3 Torque
Torque T
Maximum torsion angle αoux
For fan-nosed pliers, the maximum value of the seam source at the mouth should not exceed 0.08mm in an area not larger than 3mm from the mouth. 4.4 Other technical requirements
Other technical requirements for flat-nosed pliers shall comply with the provisions of GB/T6290. 5 Test methods
The test methods for needle-nosed pliers shall comply with the provisions of GB/T6291. 701
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