www.jbj.co.uk/couplings.html #DriveLineHarmony ® SIT-LOCK 8 Internal Locking Device - Self-centring 29 Surface finish Normal surface finish is sufficient. The following values are recommended: R ≤ 3.2 μm - R ≤ 16 μm a t Installation The locking device is supplied ready to assemble. Clean the shaft contact surfaces thoroughly and apply oil. Mount the shaft, hub and locking device in the desired position. Screw tightening sequence Tighten two diametrically opposed screws until the locking device surfaces make contact with the shaft and hub. Tighten all screws to 50% of the screw tightening torque value Ms indicated in the table in a ‘criss-cross’ sequence. Repeat to 100% of the Ms tightening torque indicated in the table. In continuous sequence, check that the tightening torque Ms has been achieved. Removal Gradually loosen the clamping screws. Remove the clamping screws and insert them into the special removal threads on the inner ring flange. Tighten the screws in a ‘criss-cross’ sequence until the locking device is released. 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 8 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 D Number Type 0 1 2 1 Ms [Nm] Mt [Nm] Fax [kN] Pw [N/mm²] Pn [N/mm²] 14 x 55 17 22 30 38 62 3 M8 41 221 32 351 90 16 x 55 17 22 30 38 62 3 M8 41 252 32 307 90 18 x 55 17 22 30 38 62 3 M8 41 284 32 273 90 19 x 55 17 22 30 38 62 3 M8 41 299 32 259 90 20 x 55 17 22 30 38 62 3 M8 41 315 32 246 90 22 x 55 17 22 30 38 62 3 M8 41 347 32 224 90 24 x 55 17 22 30 38 62 3 M8 41 378 32 205 90 25 x 55 17 22 30 38 62 3 M8 41 394 32 197 90 28 x 55 17 22 30 38 62 3 M8 41 441 32 176 90 30 x 55 17 22 30 38 62 3 M8 41 473 32 164 90 24 x 65 17 22 30 38 72 5 M8 41 630 53 341 125 25 x 65 17 22 30 38 72 5 M8 41 657 53 328 125 28 x 65 17 22 30 38 72 5 M8 41 735 53 293 125 30 x 65 17 22 30 38 72 5 M8 41 788 53 273 125 32 x 65 17 22 30 38 72 5 M8 41 840 53 256 125 35 x 65 17 22 30 38 72 5 M8 41 919 53 234 125 38 x 65 17 22 30 38 72 5 M8 41 998 53 216 125 40 x 65 17 22 30 38 72 5 M8 41 1.051 53 205 125 30 x 80 20 25 33 41 87 7 M8 41 1.103 74 325 120 32 x 80 20 25 33 41 87 7 M8 41 1.177 74 305 120 33 x 80 20 25 33 41 87 7 M8 41 1.213 74 296 120 35 x 80 20 25 33 41 87 7 M8 41 1.287 74 279 120 38 x 80 20 25 33 41 87 7 M8 41 1.397 74 257 120 40 x 80 20 25 33 41 87 7 M8 41 1.471 74 244 120 42 x 80 20 25 33 41 87 7 M8 41 1.544 74 232 120 45 x 80 20 25 33 41 87 7 M8 41 1.655 74 217 120 48 x 80 20 25 33 41 87 7 M8 41 1.765 74 203 120 50 x 80 20 25 33 41 87 7 M8 41 1.838 74 195 120
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