www.jbj.co.uk/couplings.html #DriveLineHarmony ® SIT-LOCK 12 Internal Locking Device - Self-centring 31 Reusing the locking device When reusing the locking device, check all the surfaces are clean and show no obvious signs of deformation or seizing. Clean and oil all surfaces and threads. Check the screws have not been deformed. Oil the screws and assemble the locking device as originally supplied. M Screw tightening torque Nm s M Transmissible torque Nm t F Transmissible axial force kN ax P Pressure on shaft N/mm² w P Pressure on hub N/mm² n IMPORTANT: The screw tightening torque M can be reduced by 40% of the value indicated in the table. s M , F , P , P decrease proportionally. t ax w n For further information and larger diameters or dimensions different to those in the table, please contact the jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk ® SIT-LOCK 12 internal locking device - self-centring Dimensions [mm] Clamping screws DIN 912 12.9 Values with tolerances for shaft h8/hub H8 d x D H H H H Number Type 0 1 2 Ms [Nm] Mt [Nm] Fax [kN] Pw [N/mm²] Pn [N/mm²] 18 x 40 12 15 20 24 6 M4 5 218 24 297 135 19 x 41 12 15 20 24 6 M4 5 230 24 282 130 20 x 42 12 15 20 24 7 M4 5 283 28 312 150 22 x 44 12 15 20 24 7 M4 5 311 28 284 140 24 x 46 12 15 20 24 7 M4 5 339 28 260 135 25 x 47 12 15 20 24 7 M4 5 353 28 250 135 28 x 50 12 15 20 24 9 M4 5 509 36 287 160 30 x 52 12 15 20 24 9 M4 5 545 36 268 155 32 x 54 12 15 20 24 9 M4 5 581 36 251 150 35 x 57 16 19 24 28 10 M4 5 706 40 191 115 36 x 58 16 19 24 28 10 M4 5 727 40 186 115 38 x 60 16 19 24 28 11 M4 5 844 44 194 125 40 x 62 16 19 24 28 11 M4 5 888 44 184 120 42 x 70 19 23 30 36 8 M6 17 1.532 73 243 145 45 x 73 19 23 30 36 8 M6 17 1.641 73 226 140 48 x 76 19 23 30 36 8 M6 17 1.751 73 212 135 50 x 78 19 23 30 36 8 M6 17 1.824 73 204 130 55 x 83 19 23 30 36 8 M6 17 2.006 73 185 125 56 x 84 19 23 30 36 8 M6 17 2.043 73 182 120 60 x 88 19 23 30 36 9 M6 17 2.462 82 191 130 63 x 91 19 23 30 36 9 M6 17 2.585 82 182 125 65 x 93 19 23 30 36 9 M6 17 2.667 82 176 125 70 x 105 23 28 37 45 8 M8 41 4.718 135 222 150 75 x 110 23 28 37 45 8 M8 41 5.055 135 207 140 80 x 115 23 28 37 45 8 M8 41 5.392 135 194 135 85 x 120 23 28 37 45 8 M8 41 5.729 135 183 130 90 x 125 23 28 37 45 10 M8 41 7.582 168 216 155
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