HALDER Main catalog standard parts Page 940
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Technical Appendix Torques GENERAL TORQUES STRENGTHS FOR SCREWED CONNECTIONS Thread M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 M36 M42 M48 Pitch (mm) 1 1,25 1,50 1,75 2 2 2,50 2,50 2,50 3 3 3,50 4 4,50 5 38,1 60 88 121 165 203 260 321 374 486 595 866 – – Nuts Strength Class Hardness (HRC) DIN 6330/6331 10 22–32 Test force (kN) (AS x SP) DIN EN 20898-2 10 20,9 8.8 22–32 10.9 32–39 12.9 39–44 Specified failing load (AS x Rm) (kN) 8.8 10.9 12.9 16 21 24 29 38 45 46 60 71 67 88 103 92 120 140 125 163 192 159 200 234 203 255 299 252 315 370 293 367 431 381 477 560 466 583 684 678 850 997 930 1165 1367 1222 1531 1797 Permissible load on screws max. 80 % of yield point 8.8 10.9 12.9 10 14 17 19 27 32 30 43 51 43 63 74 59 86 101 80 118 138 101 144 169 129 184 215 160 228 266 186 265 310 242 345 404 296 421 493 431 614 719 591 843 986 777 1107 1296 Test force (AS x SP) acc. to DIN ISO 898, part 1 (kN) 8.8 10.9 12.9 12 17 20 21 30 35 34 48 56 49 70 82 67 96 112 91 130 152 115 159 186 147 203 238 182 252 294 212 293 342 275 381 445 337 466 544 490 678 792 672 930 1087 882 1222 1428 Permissible prestressing force with 90 % utilization yield point and friction μ = 0,14 (kN) 8.8 10.9 12.9 9 13 15 17 25 29 26 38 44 38 55 65 53 77 91 73 107 125 91 130 152 117 167 196 146 208 243 168 240 281 221 315 369 269 384 449 394 561 657 542 773 904 714 1018 1191 Required tightening moment for permissible prestressing force and μ = 0,14 (Nm) 8.8 10.9 12.9 10 14 17 25 36 43 46 67 79 82 120 141 130 191 223 206 302 354 284 405 474 407 580 679 542 772 903 698 994 1163 1021 1455 1703 1355 1930 2258 2372 3378 3953 3802 5415 6337 5730 8162 9571 Required lever length to obtain the permissible prestressing force with normal manual force (mm) 8.8 10.9 12.9 30 42 51 65 90 110 125 175 210 215 300 360 330 450 550 490 700 830 650 920 1100 870 1200 1470 1100 1560 1860 1350 – – – – – – – – – – – – – – – – – Possible torque with normal ring spanner and torsional force. *Presstressing force resulting thereof (Nm) – 60 80 90 100 110 125 140 150 170 185 225 240 300 330 410 Possible torque with normal ring spanner and torsional force. *Presstressing force resulting thereof (kN) – 54 53 48 45 43 43 43 42 42 43 45 43 45 46 50 8.8 breaking (B) Screws Hardness (HRC) 23–24 Tightening values yielding hazard (F) * When applying this prestressing 10.9 force, there exists a (B) (F) 12.9 (B) (F) danger of a loosening of clamped parts on application of operational force danger of a loosening of clamped parts on application of operational force danger of a loosening of clamped parts on application of operational force AS = nominal load cross section in mm² / SP = test load in N/mm² / Rm = minimum tensile strength N/mm² / μ = coefficient of friction 13 940
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