www.jbj.co.uk/couplings.html #DriveLineHarmony 14 d Dmin D d D1 D H H0 H1 H2 Features Comprised of a split inner ring and outer ring, and a spacer which prevents the hub from moving relative to the shaft when tightening the screws. This locking device is particularly suitable for applications which require low hub pressures. Recommended for use with aluminium hubs or hubs with lower mechanical properties. The table shows performance data for the tolerances: shaft d h8 - coupling seat on hub H8 Do not use molybdenum disulphide-based oils or greases that reduce the coefficient of friction . The values in the table are calculated with 0.12 m m Hub to shaft centring ® The SIT-LOCK 3 locking device is self-centering so it does not require a centring base between the shaft and hub. This allows for hubs with reduced widths which saves on materials and leads to reduced costs. Installation with non-lubricated surfaces (dry) ® The SIT-LOCK 3 locking device is lubricated with oil before delivery to protect it from oxidation during storage. The values shown in the table have been calculated for applications with oiled contact surfaces. For dry installation, the values are: M , F +5% and P ,P -16% t ax w n To get these values, the locking device must be completely disassembled and all component surfaces must be cleaned with solvent. The shaft and hub contact surfaces must also be completely clean and oil-free. Axial displacement When tightening the screws there is no hub to shaft axial displacement. Radial loads ® The SIT-LOCK 3 locking device is suitable for applications subject to high radial loads. For further information, please contact the jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk Surface finish Normal surface finish is sufficient. The following values are recommended: R ≤ 3.2 μm - R ≤ 16 μm a t ® SIT-LOCK 3 applications without spacer ® Using SIT-LOCK 3 without a flange is not recommended because when the screws are being tightened, there would be a hub to shaft axial displacement. For spacer-free applications, the installation type shown in figure 1 is recommended. 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 M tightening torque indicated in the table. In continuous s sequence, check that the tightening torque M has been achieved. s figure 1 ® SIT-LOCK 3 Internal Locking Device - Self-centring
RkJQdWJsaXNoZXIy NzQyNjQ=