在组装不锈钢接头时，需要使用转速非常低的螺丝驱动机器，或者手动拧紧螺丝。不应使用冲压式螺丝驱动机器。
在不利的组装条件下，建议使用MoS2润滑剂或类似产品。如果在组装过程中出现严重的螺纹咬合问题，请联系我们的技术服务部门。
| Class | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M24 | M27 | M30 | M36 | |
| Tightening torque Nm ¹ | Bumax Ultra 159 ³ | 2.6 | 6.1 | 12 | 21 | 50 | 99 | 172 | 273 | 420 | ||||||
| Bumax DX/SDX 129 | 2.1 | 4.9 | 9.8 | 16 | 40 | 79 | 137 | 218 | 336 | |||||||
| Bumax DX/SDX 109 | 1.7 | 4.1 | 8.1 | 14 | 34 | 66 | 115 | 182 | 280 | 390 | 547 | 840 | ||||
| BUMAX 109 | 1.7 | 4.1 | 8.1 | 14 | 34 | 66 | 115 | 182 | 280 | 344 | 547 | |||||
| BUMAX 88 | 1.3 | 2.9 | 5.7 | 10 | 25 | 47 | 82 | 129 | 198 | 275 | 385 | 665 | 960 | 1310 | 2280 | |
| BUMAX Lock | 6.6 | 12 | 29 | 54 | 94 | 148 | 228 | 317 | 442 | 765 | ||||||
| 80 | 1.2 | 2.7 | 5.4 | 9 | 22 | 44 | 76 | 121 | 187 | 261 | 364 | 629 | 909 | 1240 | 2160 | |
| 70 | 0.9 | 2 | 4 | 7 | 17 | 33 | 57 | 91 | 140 | 195 | 273 | 472 | 682 | 930 | 1620 |
| Class | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M24 | M27 | M30 | M36 | |
| Preload applied kN² | Bumax Ultra 159 ³ | 4.4 | 7.7 | 12 | 18 | 32 | 51 | 74 | 100 | 138 | ||||||
| Bumax DX/SDX 129 | 3.5 | 6.2 | 10 | 14 | 26 | 41 | 59 | 81 | 110 | |||||||
| Bumax DX/SDX 109 | 2.9 | 5.2 | 8.6 | 12 | 21 | 34 | 49 | 67 | 92 | 112 | 143 | 207 | ||||
| BUMAX 109 | 2.9 | 5.2 | 8.6 | 12 | 21 | 34 | 49 | 67 | 92 | 112 | 143 | |||||
| BUMAX 88 | 2.1 | 3.6 | 5.9 | 8.4 | 15 | 24 | 35 | 48 | 65 | 80 | 102 | 146 | 190 | 233 | 340 | |
| BUMAX Lock | 5.9 | 8.4 | 15 | 24 | 35 | 48 | 65 | 80 | 102 | 181 | ||||||
| 80 | 2.0 | 3.4 | 5.5 | 7.8 | 14 | 23 | 33 | 45 | 61 | 76 | 96 | 138 | 179 | 219 | 319 | |
| 70 | 1.5 | 2.6 | 4.2 | 5.9 | 11 | 17 | 25 | 34 | 47 | 57 | 72 | 103 | 134 | 164 | 239 |
| Class | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M24 | M27 | M30 | M36 | |
| Failure load, min kN | Bumax Ultra 159 ³ | 7.5 | 13 | 21 | 30 | 55 | 87 | 127 | 173 | 236 | ||||||
| Bumax DX/SDX 129 | 6 | 10.5 | 17 | 24 | 44 | 70 | 101 | 138 | 188 | |||||||
| Bumax DX/SDX 109 | 5 | 8.8 | 14 | 20 | 36 | 58 | 84 | 115 | 157 | 192 | 245 | 353 | ||||
| BUMAX 109 | 5 | 8.8 | 14 | 20 | 36 | 58 | 84 | 115 | 157 | 192 | 245 | |||||
| BUMAX 88 | 4 | 7 | 11 | 16 | 29 | 46 | 67 | 92 | 126 | 154 | 196 | 282 | 367 | 449 | 654 | |
| BUMAX Lock | 11 | 16 | 29 | 46 | 67 | 92 | 126 | 154 | 196 | 282 | ||||||
| 80 | 4 | 7 | 11 | 16 | 29 | 46 | 67 | 92 | 126 | 154 | 196 | 282 | 367 | 449 | 654 | |
| 70 | 3.5 | 6.1 | 9.9 | 14 | 26 | 41 | 59 | 81 | 110 | 134 | 172 | 247 | 321 | 393 | 572 |
| Class | M3 | M4 | M5 | M6 | M8 | M10 | M12 | M14 | M16 | M18 | M20 | M24 | M27 | M30 | M36 | |
| Yield load, min kN | 15.9 ³ | 6.8 | 12 | 19 | 27 | 49 | 78 | 114 | 155 | 212 | ||||||
| 12.9 ³ | 5.4 | 9.5 | 15 | 21 | 39 | 62 | 91 | 124 | 170 | |||||||
| Bumax DX/SDX 109 | 4.5 | 8 | 13 | 18 | 33 | 52 | 76 | 104 | 141 | 173 | 221 | 318 | ||||
| BUMAX 109 | 4.5 | 8 | 13 | 18 | 33 | 52 | 76 | 104 | 141 | 173 | 221 | |||||
| BUMAX 88 | 3.2 | 6 | 9 | 13 | 23 | 37 | 54 | 74 | 100 | 123 | 157 | 226 | 294 | 359 | 523 | |
| BUMAX Lock | 9 | 13 | 23 | 37 | 54 | 74 | 100 | 123 | 157 | 226 | ||||||
| 80 | 3 | 5 | 8 | 12 | 22 | 35 | 51 | 69 | 94 | 115 | 147 | 212 | 275 | 337 | 490 | |
| 70 | 2.2 | 4 | 6 | 9 | 16 | 26 | 38 | 52 | 71 | 86 | 110 | 159 | 207 | 253 | 368 | |
| Nominal stress area mm² |
5.03 | 8.78 | 14.2 | 20.1 | 36.6 | 58.0 | 84.3 | 115 | 157 | 192 | 245 | 353 | 459 | 561 | 817 | |
| Pitch of thread | 0.5 | 0.7 | 0.8 | 1.0 | 1.25 | 1.5 | 1.75 | 2.0 | 2.0 | 2.5 | 2.5 | 3.0 | 3.0 | 3.5 | 4.0 |
UNC
| Class | 1/4-20 UNC | 5/16-18 UNC | 3/8-16 UNC | 1/2-13 UNC | 5/8-11 UNC | 3/4-10 UNC | 7/8-9 UNC | 1-8 UNC | |
|---|---|---|---|---|---|---|---|---|---|
| Tightening torque Nm ¹ | BUMAX 88 | 11.0 | 22.0 | 39.0 | 95.0 | 188.0 | 329.0 | 527.0 | 789.0 |
| 80 | 10.0 | 21.0 | 37.0 | 89.0 | 175.0 | 308.0 | 493.0 | 737.0 | |
| 70 | 7.7 | 16.0 | 28.0 | 66.0 | 131.0 | 231.0 | 369.0 | 553.0 | |
| 50 | 3.6 | 7.3 | 13.0 | 31.0 | 61.0 | 108.0 | 172.0 | 258.0 |
| Class | 1/4-20 UNC | 5/16-18 UNC | 3/8-16 UNC | 1/2-13 UNC | 5/8-11 UNC | 3/4-10 UNC | 7/8-9 UNC | 1-8 UNC | |
|---|---|---|---|---|---|---|---|---|---|
| Preload applied kN² | BUMAX 88 | 8.7 | 14.3 | 21.1 | 38.7 | 61.7 | 91.2 | 125.9 | 165.2 |
| 80 | 8.0 | 13.2 | 19.5 | 35.7 | 56.9 | 84.2 | 116.2 | 152.5 | |
| 70 | 6.0 | 9.9 | 14.6 | 26.8 | 42.7 | 63.2 | 87.2 | 114.4 | |
| 50 | 2.8 | 4.6 | 6.8 | 12.5 | 19.9 | 29.5 | 40.7 | 53.4 |
| Class | 1/4-20 UNC | 5/16-18 UNC | 3/8-16 UNC | 1/2-13 UNC | 5/8-11 UNC | 3/4-10 UNC | 7/8-9 UNC | 1-8 UNC | |
|---|---|---|---|---|---|---|---|---|---|
| Failure load, min kN | BUMAX 88 | 17.0 | 28.0 | 41.5 | 75.9 | 121.0 | 179.0 | 247.0 | 325.0 |
| 80 | 17.0 | 28.0 | 41.5 | 75.9 | 121.0 | 179.0 | 247.0 | 325.0 | |
| 70 | 14.3 | 23.6 | 35.0 | 64.1 | 102.2 | 151.2 | 208.6 | 273.7 | |
| 50 | 10.2 | 16.9 | 25.0 | 45.7 | 73.0 | 108.0 | 149.0 | 195.5 |
| Class | 1/4-20 UNC | 5/16-18 UNC | 3/8-16 UNC | 1/2-13 UNC | 5/8-11 UNC | 3/4-10 UNC | 7/8-9 UNC | 1-8 UNC | |
|---|---|---|---|---|---|---|---|---|---|
| Yield load, min kN | BUMAX 88 | 13.1 | 22.4 | 33.2 | 60.8 | 96.9 | 143.4 | 197.9 | 256.6 |
| 80 | 12.3 | 20.3 | 30.0 | 54.9 | 87.6 | 129.6 | 178.8 | 234.6 | |
| 70 | 9.2 | 15.2 | 22.5 | 41.2 | 65.7 | 97.2 | 134.1 | 175.9 | |
| 50 | 4.3 | 7.1 | 10.5 | 19.2 | 30.7 | 45.4 | 62.6 | 82.1 | |
| Nominal stress area mm² |
20.5 | 33.8 | 50.5 | 91.5 | 146.0 | 216.0 | 298.0 | 391.0 |
Bumax Hard Taptite, thread forming screws
| Class | M3 | M4 | M5 | M6 | M8 | M10 | |
|---|---|---|---|---|---|---|---|
| Tightening torque Nm | Hard Taptite | 1.3 | 3 | 6 | 12 | 25 | 49 |
| Thread cutting torque Nm | Hard Taptite | 0.7 | 1.8 | 3.5 | 8 | 15 | 28 |
| Breaking torque, min Nm | Hard Taptite | 4.5 | 7.9 | 13 | 20 | 30 | 52 |
表格脚注
¹扭矩建议适用于使用高质量润滑剂润滑的无毛刺表面。扭矩建议是基于摩擦系数为0.14计算的，这需要高质量的润滑剂。如果润滑不足，预紧力可能会有很大变化。
²施加的预紧力（kN）按Rp0.2的65%计算，但在实践中，该值可能在50-80%之间变化（+/- 23%）。
³BUMAX® Ultra“世界上最坚固的不锈钢紧固件”的典型强度等级为159（抗拉强度最小1500 MPa/屈服强度最小1350 MPa）。所有BUMAX Ultra紧固件均为定制制造，以满足个别应用的需求，并可提供不同的机械性能，有时强度甚至高于159级。BUMAX® Ultra是一种先进的工程等级，BUMAX客户项目提供密切的技术支持，以开发所需的最终解决方案。请联系BUMAX销售代表以获取更多信息。