強度区分8.8 ボルト締付トルク表
強度区分8.8のボルト(M1.6〜M64)の締付トルクと締付軸力です。たとえばM8 8.8のボルトは、乾燥状態で約26.6 N·m (19.6 ft·lb)が必要です。
焼入れ焼戻しした中炭素鋼。機械、自動車、構造用ボルトで最も一般的な高強度区分です。
- 規格
- メートル(ISO 898-1)
- 使用した降伏点
- 640 MPa (93 ksi)
- 引張強さ
- 800 MPa (116 ksi)
- 対象サイズ
- M1.6 – M64
| サイズ | ねじピッチ | 締付軸力軸力 | 乾燥μ 0.15 | 油潤滑μ 0.11 | PTFE・モリブデンペーストμ 0.06 |
|---|---|---|---|---|---|
| M1.6 | M1.6×0.350.35 mm | 0.57 kN128 lbf | 0.20 N·m0.15 ft·lb | 0.15 N·m0.11 ft·lb | 0.11 N·m0.08 ft·lb |
| M2 | M2×0.40.4 mm | 0.93 kN209 lbf | 0.42 N·m0.31 ft·lb | 0.31 N·m0.23 ft·lb | 0.21 N·m0.16 ft·lb |
| M2.5 | M2.5×0.450.45 mm | 1.52 kN342 lbf | 0.84 N·m0.62 ft·lb | 0.63 N·m0.46 ft·lb | 0.42 N·m0.31 ft·lb |
| M3 | M3×0.50.5 mm | 2.25 kN507 lbf | 1.43 N·m1.05 ft·lb | 1.08 N·m0.79 ft·lb | 0.72 N·m0.53 ft·lb |
| M3.5 | M3.5×0.60.6 mm | 3.04 kN682 lbf | 2.20 N·m1.62 ft·lb | 1.66 N·m1.22 ft·lb | 1.11 N·m0.82 ft·lb |
| M4 | M4×0.70.7 mm | 3.93 kN884 lbf | 3.29 N·m2.43 ft·lb | 2.48 N·m1.83 ft·lb | 1.67 N·m1.23 ft·lb |
| M5 | M5×0.80.8 mm | 6.35 kN1428 lbf | 6.39 N·m4.71 ft·lb | 4.80 N·m3.54 ft·lb | 3.22 N·m2.38 ft·lb |
| M6 | M6×11 mm | 9.02 kN2027 lbf | 11.0 N·m8.15 ft·lb | 8.32 N·m6.13 ft·lb | 5.59 N·m4.12 ft·lb |
| M7 | M7×11 mm | 12.9 kN2907 lbf | 17.9 N·m13.2 ft·lb | 13.4 N·m9.88 ft·lb | 8.90 N·m6.57 ft·lb |
| M8 | M8×1.251.25 mm | 16.4 kN3687 lbf | 26.6 N·m19.6 ft·lb | 20.0 N·m14.7 ft·lb | 13.3 N·m9.84 ft·lb |
| M10 | M10×1.51.5 mm | 26.0 kN5840 lbf | 52.0 N·m38.3 ft·lb | 39.0 N·m28.7 ft·lb | 26.0 N·m19.2 ft·lb |
| M12 | M12×1.751.75 mm | 37.8 kN8487 lbf | 89.2 N·m65.8 ft·lb | 66.8 N·m49.3 ft·lb | 44.5 N·m32.8 ft·lb |
| M14 | M14×22 mm | 51.7 kN11626 lbf | 141.8 N·m104.6 ft·lb | 106.2 N·m78.3 ft·lb | 70.6 N·m52.1 ft·lb |
| M16 | M16×22 mm | 70.2 kN15779 lbf | 217.3 N·m160.3 ft·lb | 161.9 N·m119.4 ft·lb | 106.6 N·m78.6 ft·lb |
| M18 | M18×2.52.5 mm | 86.2 kN19385 lbf | 303.5 N·m223.9 ft·lb | 227.1 N·m167.5 ft·lb | 150.7 N·m111.1 ft·lb |
| M20 | M20×2.52.5 mm | 109.7 kN24654 lbf | 424.9 N·m313.4 ft·lb | 316.6 N·m233.5 ft·lb | 208.4 N·m153.7 ft·lb |
| M22 | M22×2.52.5 mm | 135.9 kN30557 lbf | 579.7 N·m427.6 ft·lb | 430.5 N·m317.5 ft·lb | 281.2 N·m207.4 ft·lb |
| M24 | M24×33 mm | 157.9 kN35502 lbf | 731.9 N·m539.8 ft·lb | 545.5 N·m402.3 ft·lb | 359.1 N·m264.9 ft·lb |
| M27 | M27×33 mm | 205.8 kN46269 lbf | 1074.4 N·m792.4 ft·lb | 797.2 N·m588.0 ft·lb | 520.1 N·m383.6 ft·lb |
| M30 | M30×3.53.5 mm | 251.1 kN56459 lbf | 1462.1 N·m1078.4 ft·lb | 1086.7 N·m801.5 ft·lb | 711.3 N·m524.6 ft·lb |
| M33 | M33×3.53.5 mm | 310.7 kN69851 lbf | 1968.2 N·m1451.6 ft·lb | 1458.5 N·m1075.7 ft·lb | 948.8 N·m699.8 ft·lb |
| M36 | M36×44 mm | 365.9 kN82256 lbf | 2537.8 N·m1871.8 ft·lb | 1883.4 N·m1389.1 ft·lb | 1228.9 N·m906.4 ft·lb |
| M39 | M39×44 mm | 437.1 kN98272 lbf | 3272.1 N·m2413.3 ft·lb | 2422.0 N·m1786.4 ft·lb | 1571.9 N·m1159.4 ft·lb |
| M42 | M42×4.54.5 mm | 502.2 kN112892 lbf | 4060.9 N·m2995.2 ft·lb | 3010.0 N·m2220.0 ft·lb | 1959.0 N·m1444.9 ft·lb |
| M45 | M45×4.54.5 mm | 585.1 kN131533 lbf | 5052.8 N·m3726.8 ft·lb | 3737.0 N·m2756.3 ft·lb | 2421.3 N·m1785.8 ft·lb |
| M48 | M48×55 mm | 660.0 kN148367 lbf | 6120.7 N·m4514.4 ft·lb | 4531.9 N·m3342.5 ft·lb | 2943.0 N·m2170.7 ft·lb |
| M52 | M52×55 mm | 787.5 kN177039 lbf | 7832.1 N·m5776.6 ft·lb | 5786.0 N·m4267.6 ft·lb | 3740.0 N·m2758.5 ft·lb |
| M56 | M56×5.55.5 mm | 909.4 kN204452 lbf | 9769.5 N·m7205.6 ft·lb | 7221.4 N·m5326.3 ft·lb | 4673.4 N·m3446.9 ft·lb |
| M60 | M60×5.55.5 mm | 1058.2 kN237889 lbf | 12077.4 N·m8907.8 ft·lb | 8910.9 N·m6572.3 ft·lb | 5744.3 N·m4236.8 ft·lb |
| M64 | M64×66 mm | 1198.8 kN269509 lbf | 14550.0 N·m10731.5 ft·lb | 10743.4 N·m7924.0 ft·lb | 6936.9 N·m5116.4 ft·lb |
| サイズ | ねじピッチ | 締付軸力軸力 | 乾燥μ 0.15 | 油潤滑μ 0.11 | PTFE・モリブデンペーストμ 0.06 |
|---|---|---|---|---|---|
| M1.6 | M1.6×0.20.2 mm | 0.70 kN158 lbf | 0.24 N·m0.18 ft·lb | 0.18 N·m0.13 ft·lb | 0.12 N·m0.09 ft·lb |
| M2 | M2×0.250.25 mm | 1.10 kN247 lbf | 0.47 N·m0.35 ft·lb | 0.35 N·m0.26 ft·lb | 0.23 N·m0.17 ft·lb |
| M2.5 | M2.5×0.350.35 mm | 1.66 kN373 lbf | 0.90 N·m0.66 ft·lb | 0.67 N·m0.49 ft·lb | 0.44 N·m0.32 ft·lb |
| M3 | M3×0.350.35 mm | 2.51 kN565 lbf | 1.55 N·m1.15 ft·lb | 1.15 N·m0.85 ft·lb | 0.75 N·m0.55 ft·lb |
| M3.5 | M3.5×0.350.35 mm | 3.54 kN796 lbf | 2.47 N·m1.82 ft·lb | 1.83 N·m1.35 ft·lb | 1.18 N·m0.87 ft·lb |
| M4 | M4×0.50.5 mm | 4.39 kN986 lbf | 3.58 N·m2.64 ft·lb | 2.66 N·m1.96 ft·lb | 1.74 N·m1.29 ft·lb |
| M5 | M5×0.50.5 mm | 7.22 kN1624 lbf | 7.03 N·m5.19 ft·lb | 5.20 N·m3.84 ft·lb | 3.37 N·m2.48 ft·lb |
| M6 | M6×0.750.75 mm | 9.87 kN2219 lbf | 11.8 N·m8.73 ft·lb | 8.81 N·m6.50 ft·lb | 5.78 N·m4.27 ft·lb |
| M7 | M7×0.750.75 mm | 13.9 kN3136 lbf | 18.9 N·m14.0 ft·lb | 14.0 N·m10.4 ft·lb | 9.13 N·m6.73 ft·lb |
| M8 | M8×11 mm | 17.5 kN3945 lbf | 28.0 N·m20.6 ft·lb | 20.8 N·m15.4 ft·lb | 13.7 N·m10.1 ft·lb |
| M10 | M10×1.251.25 mm | 27.4 kN6164 lbf | 54.1 N·m39.9 ft·lb | 40.3 N·m29.7 ft·lb | 26.5 N·m19.5 ft·lb |
| M12 | M12×1.51.5 mm | 39.5 kN8876 lbf | 92.2 N·m68.0 ft·lb | 68.7 N·m50.7 ft·lb | 45.2 N·m33.3 ft·lb |
| M14 | M14×1.51.5 mm | 55.8 kN12544 lbf | 150.1 N·m110.7 ft·lb | 111.2 N·m82.0 ft·lb | 72.4 N·m53.4 ft·lb |
| M16 | M16×1.51.5 mm | 74.9 kN16844 lbf | 228.0 N·m168.2 ft·lb | 168.4 N·m124.2 ft·lb | 108.7 N·m80.2 ft·lb |
| M18 | M18×1.51.5 mm | 96.9 kN21778 lbf | 330.9 N·m244.0 ft·lb | 243.5 N·m179.6 ft·lb | 156.1 N·m115.1 ft·lb |
| M20 | M20×1.51.5 mm | 121.6 kN27344 lbf | 458.5 N·m338.2 ft·lb | 336.5 N·m248.2 ft·lb | 214.6 N·m158.3 ft·lb |
| M22 | M22×1.51.5 mm | 149.2 kN33543 lbf | 620.7 N·m457.8 ft·lb | 454.6 N·m335.3 ft·lb | 288.4 N·m212.7 ft·lb |
| M24 | M24×22 mm | 172.2 kN38716 lbf | 780.1 N·m575.4 ft·lb | 574.1 N·m423.5 ft·lb | 368.2 N·m271.6 ft·lb |
| M27 | M27×22 mm | 222.1 kN49928 lbf | 1136.1 N·m838.0 ft·lb | 833.6 N·m614.8 ft·lb | 531.0 N·m391.6 ft·lb |
| M30 | M30×22 mm | 278.3 kN62564 lbf | 1576.5 N·m1162.8 ft·lb | 1153.9 N·m851.1 ft·lb | 731.4 N·m539.4 ft·lb |
| M33 | M33×22 mm | 340.8 kN76623 lbf | 2105.5 N·m1552.9 ft·lb | 1538.3 N·m1134.6 ft·lb | 971.2 N·m716.3 ft·lb |
| M36 | M36×33 mm | 387.5 kN87112 lbf | 2647.1 N·m1952.4 ft·lb | 1947.9 N·m1436.7 ft·lb | 1248.7 N·m921.0 ft·lb |
| M39 | M39×33 mm | 460.7 kN103573 lbf | 3400.3 N·m2508.0 ft·lb | 2497.2 N·m1841.8 ft·lb | 1594.0 N·m1175.7 ft·lb |
| M42 | M42×33 mm | 540.3 kN121459 lbf | 4284.3 N·m3159.9 ft·lb | 3140.8 N·m2316.5 ft·lb | 1997.4 N·m1473.2 ft·lb |
| M45 | M45×33 mm | 626.2 kN140769 lbf | 5309.3 N·m3915.9 ft·lb | 3886.3 N·m2866.4 ft·lb | 2463.4 N·m1816.9 ft·lb |
| M48 | M48×33 mm | 718.4 kN161502 lbf | 6512.2 N·m4803.1 ft·lb | 4760.1 N·m3510.9 ft·lb | 3008.0 N·m2218.6 ft·lb |
| M52 | M52×44 mm | 819.1 kN184130 lbf | 8060.0 N·m5944.8 ft·lb | 5919.2 N·m4365.8 ft·lb | 3778.3 N·m2786.7 ft·lb |
| M56 | M56×44 mm | 960.5 kN215927 lbf | 10167.0 N·m7498.8 ft·lb | 7453.3 N·m5497.3 ft·lb | 4739.6 N·m3495.7 ft·lb |
| M60 | M60×44 mm | 1113.2 kN250255 lbf | 12530.4 N·m9242.0 ft·lb | 9173.1 N·m6765.7 ft·lb | 5815.7 N·m4289.4 ft·lb |
| M64 | M64×44 mm | 1277.1 kN287115 lbf | 15233.1 N·m11235.4 ft·lb | 11137.7 N·m8214.8 ft·lb | 7042.4 N·m5194.2 ft·lb |
締付軸力は降伏荷重の70%です。トルクはISO 16047 / VDI 2230に基づき、標準六角頭で、ねじ面と座面に同じ摩擦係数μを用いて算出しています。サイズをクリックすると、二面幅、下穴径、計算例を確認できます。メーカー指定値がある場合は、必ずそちらに従ってください。
よくある質問
M8 8.8のボルトの締付トルクは?
乾燥状態で約26.6 N·m (19.6 ft·lb)、油潤滑で約20.0 N·m (14.7 ft·lb)です(M8×1.25、降伏荷重の70%、締付軸力16.4 kN)。
M10 8.8のボルトの締付トルクは?
乾燥状態で約52.0 N·m (38.3 ft·lb)、油潤滑で約39.0 N·m (28.7 ft·lb)です(M10×1.5、降伏荷重の70%、締付軸力26.0 kN)。
M12 8.8のボルトの締付トルクは?
乾燥状態で約89.2 N·m (65.8 ft·lb)、油潤滑で約66.8 N·m (49.3 ft·lb)です(M12×1.75、降伏荷重の70%、締付軸力37.8 kN)。