Bolt tightening torque calculation and tightening torque standard
The bolt tightening torque is an important basis for the selected bolt type and pattern. For standard bolts, there is a fixed range of bolt tightening torques. Bolts can be selected based on this range. In general, the tensile strength and shear strength of the screw are constant. In actual use, the tightening force should be calculated based on the specific connection stress, and then the appropriate size of the screw bolt should be selected. Bolt tightening torque calculation T=KFd T: torque to tighten the nut K: torque coefficient ( approximate 0.2) F: Preload d: Bolt diameter Remark: The general connection steel bolt connection recommended by the following relationship to determine Carbon Steel: F<=(0.6~0.7) Os A1 Alloy steel: F<=(0.5~0.6) Os A1 Os : Yield Limit of Bolt Material A1 : Bolt Hazardous Section Area Ordinary bolt tightening torque standard bolt strength level yield strength N/mm 2 screw  bolt  public  Said  straight  path  Mm 6 8 10 12 14 16 18 20 screw  tight  force  Moment   Nm 4.6 5.6 6.8 8.8 10.9 12.9 240 300 480 640 900 1080 4-5 5-7 7-9 9-12 13-16 16-21 10-12 12-15 17-23 22-30 30-36 38-51 20-25 25-32 33-45 45-59 65-78 75-100 36-45 45-55 58-78 78-104 110-130 131-175 55-70 70-90 93-124 124-165 180-201 209-278 90-110 110-140 145-193 193-257 280-330 326-434 120-150 150-190 199-264 264-354 380-450 448-597 170-210 210-270 282-376 376-502 540-650 635-847 bolt strength level yield strength N/mm 2 screw  bolt  public  Said  straight  path     Mm twenty two twenty four 27 30 33 36 39 screw  tight  force  Moment    Nm 4.6 5.6 6.8 8.8 10.9 12.9 240 300 480 640 900 1080 230-290 290-350 384-512 512-683 740-880 864-1152 300-377 370-450 488-650 651-868 940-1120 1098-1464 450-530 550-700 714-952 952-1269 1400-1650 1606-2142 540-680 680-850 969-1293 1293-1723 1700-2000 2181-2908 670-880 825-1100 1319-1759 1759-2345 2473-3298 2968-3958 900-1100 1120-1400 1694-2259 2259-3012 2800-3350 3812-5082 928-1237 1160-1546 1559-2079 2923-3898 4111-5481 4933-6577 Metric bolt tightening torque standard material 45 , 35CrMo or equivalent Nominal thread diameter ( mm ) Range Nm(kgfm) Target Nm (kgfm) M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M33 M36 M39 8.8-14.7 (0.9-1.5) 14.7-34 (1.5-3.5) 34-74 (3.5-7.5) 54-123 (5.5-12.5) 84-196 (8.5-20) 147-309 (15.0-31.5) 201-427 (20.5-43.5) 319-608 (32.5-62.0) 471-829 (48.0-84.5) 588-1030 (60-105) 883-1470 (90-150) 1130-1910(115-195) 1470-2450 (150-250) 1860-3040 (190-310) 2260-3630 (230-370) 12(1.2) 25(2.5) 54(5.5). 89 (9.0) 137(14) 230 (23.5) 315 (32) 460(47) 650 (66.5) 810 (82.5) 1180(120) 1520 (155) 1960 (200) 2450 (250) 2940 ( 300 ) The bolt tightening torque is an important basis for the selected bolt type and pattern. For standard bolts, there is a fixed range of bolt tightening torques. Bolts can be selected based on this range. In general, the tensile strength and shear strength of the screw are constant. In actual use, the tightening force should be calculated based on the specific connection stress, and then the appropriate size of the screw bolt should be selected. Bolt tightening torque calculation T=KFd T: torque to tighten the nut K: torque coefficient ( approximate 0.2) F: Preload d: Bolt diameter Remark: The general connection steel bolt connection recommended by the following relationship to determine Carbon Steel: F<=(0.6~0.7) Os A1 Alloy steel: F<=(0.5~0.6) Os A1 Os : Yield Limit of Bolt Material A1 : Bolt Hazardous Section Area Ordinary bolt tightening torque standard bolt strength level yield strength N/mm 2 screw  bolt  public  Said  straight  path  Mm 6 8 10 12 14 16 18 20 screw  tight  force  Moment   Nm 4.6 5.6 6.8 8.8 10.9 12.9 240 300 480 640 900 Solar Panels since 2004, our Solar Modules are certified by TUV IEC (Germany), MCS (UK), CEC (Australia), CE (SGS), SCONAP (Nigeria), INMETRO (Brazil), etc. The range is from 5W to 350W, both Polycrystalline and Monocrystalline Solar Panels, include build-in junction boxes, tempered glass, and solid aluminum frames. At present, we are exporting solar modules to Europe, Australia, USA, and some other districts. KOMAES solar panels are durable, high-efficiency. The solar panels are available for RVs, boats, Camping, and Remote off-grid power systems, our customers often use for remote transmitters, battery charging, electric gate openers, RVs, marine, etc. LED Light LED Light,DC LED Lights,DC LED Lights 12V,DC LED Light Fixture NINGBO KOMAES SOLAR TECHNOLOGY CO., LTD. , http://www.komaes-solar.com
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