用力矩扳手正规测定拧紧力矩
螺栓规格 d
mm 螺距 P
mm
计算拧紧力
矩 T
Nm
s s
MPa
螺栓公称应力截
面积As
mm2
外螺纹小径 d1
mm
外螺纹中径 d2
mm
40.7 1.503558.778720924 3.242227772 3.545336663
M85
M906, 4, 3, 2
M956, 4, 3, 2
M1006, 4, 3, 2
M1056, 4, 3, 2
M1106, 4, 3, 2
M1156, 4, 3, 2
M1206, 4, 3, 2
M1256, 4, 3, 2
M1306, 4, 3, 2
M1356, 4, 3, 2
M1406, 4, 3, 2
M1456, 4, 3, 2
M1508, 6, 4, 3, 2 M3008, 6, 4,
螺纹原始三角形高度H
mm 计算直径 d3
mm
0.8*T
Nm
0.6*T
Mm
0.606218 3.1411915 1.200.90
通常取计算值的0.8倍
左右作为实际应用的拧
紧力矩值.
能