www.jbj.co.uk/couplings.html #DriveLineHarmony ® SIT-LOCK 4A Internal Locking Device - Self-centring 19 Removal Gradually loosen the clamping screws and remove them from the locking device. Insert the screws into the front tapered bush removal threads and tighten them in a ‘criss-cross’ sequence until the front tapered bush is completely removed. Do not tighten the screws to a value greater than the M tightening torque s indicated in the table. Insert the screws into the extraction threads of the outer ring’s central flange and tighten them in a ‘criss-cross’ sequence until the rear tapered bush is fully removed. Do not tighten the screws to a value greater than the M tightening torque indicated in the table. s Reusing the locking device When reusing the locking device, check all the surfaces are clean and show no obvious signs of deformation or seizing. Oil all surfaces and the inside of the threads. Check the screws have not been deformed. Oil the screws and reinstall the components in their original places. 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 Dimensions [mm] Clamping screws DIN 912 12.9 Values with tolerances for shaft h8/hub H8 ® SIT-LOCK 4A internal locking device - self-centring d x D H H H Number Type 1 2 Ms [Nm] Mt [Nm] Fax [kN] Pw [N/mm²] Pn [N/mm²] 25 x 55 32 40 46 6 M6 17 877 70 286 105 28 x 55 32 40 46 6 M6 17 982 70 256 105 30 x 55 32 40 46 6 M6 17 1.052 70 239 105 35 x 60 44 54 60 7 M6 17 1.432 82 163 80 38 x 75 44 54 62 7 M8 41 2.873 151 278 120 40 x 75 44 54 62 7 M8 41 3.025 151 264 120 42 x 75 44 54 62 7 M8 41 3.176 151 265 120 45 x 75 44 54 62 7 M8 41 3.403 151 235 120 48 x 80 56 64 72 8 M8 41 4.148 173 199 100 50 x 80 56 64 72 8 M8 41 4.321 173 191 100 55 x 85 56 64 72 9 M8 41 5.347 194 195 110 60 x 90 56 64 72 10 M8 41 6.482 216 199 115 65 x 95 56 64 72 10 M8 41 7.022 216 184 110 ® ® ® From diameters of 70 mm, SIT-LOCK 4A is the same as SIT-LOCK 4. For SIT-LOCK 4 dimensions and performance, refer to the table on page 19.
RkJQdWJsaXNoZXIy NzQyNjQ=