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source:Industry News release time:2022-08-20 Article author:yu Popular:Air band saw
Common open-end wrench specifications----corresponding to thread specifications
7, 8, 10, 14, 17, 19, 22, 24, 27, 30, 32, 36, 41, 46, 55, 65; corresponding thread specifications are M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, M36, M42.
7--M4, 8--M5, 10--M6, 14--M8, 17--M10, 19--M12, 22--M14, 24--M16, 27--M18, 30--M20, 32--M22, 36--M24, 41--M27, 46--M30, 55--M36, 65--M42.
The minimum size of the full set of Allen wrenches is 3, and the corresponding relationship is S3=M4, S4=M5, S5=M6, S6=M8, S8=M10, S10=M12, S12=M14-M16, S14=M18-M20, S17=M22-M Shenzhen Living Network 24, S19=M27-M30, S24=M36, S27=M42.
Calculation method for the diameter of the bottom hole of the thread before tapping; for brittle materials, according to the basic size - 1.0826 pitch, for plastic materials, according to the basic size of the thread - pitch + 0.1.
Brittle materials are in pure cutting state when tapping, and the size of the bottom hole is the diameter of the thread bottom circle. When plastic materials are tapped, due to the plastic deformation of the material after the material is stressed, the material will move to the small diameter of the thread, so the bottom hole should be appropriately enlarged. .
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