www.jbj.co.uk/couplings.html #DriveLineHarmony 46 Features Composed of two tapered rings, an inner ring, a split outer ring and a ring nut with locking washer. It is suitable for applications that require reduced radial and axial dimensions. Particularly suitable for applications without screw tightening space. The ring nut can actually be tightened from above using a special key of very reduced size. The table shows performance data for the following 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 9 locking device is not self-centering so it requires a centring base between the shaft and hub. Where optimum concentricity is required, a centring base with a width ≥ H is recommended. Axial displacement Application 1: When tightening the ring nut, there is no hub to shaft axial displacement. The values in the table are valid for application 1. Application 2: When tightening the ring nut, there is hub to shaft axial displacement. The Mt, Fax, Pw and Pn values increase by 28% compared to the values shown in the table. Surface finish Normal surface finish is sufficient. The following values are recommended: R ≤ 3.2 μm - R ≤ 16 μm a t Considering that using the SIT-LOCK® 2 model requires tight tolerances, precise surface finishes, and additional accessory costs (flange, screw threads), we recommend using SIT-LOCK® 9. Installation Clean the shaft and hub contact surfaces thoroughly. Insert the shaft, the hub and SIT-LOCK® 9 locking device in the desired position. Nut tightening sequence: Tighten the ring nut to the tightening torque Ms indicated in the table. Lock the ring nut using the appropriate locking washer as shown in the figure. Removal Unlock the ring nut from the locking washer. Loosen the ring nut until the locking device is fully removed. Removal may be difficult in some applications because there are no disassembly threads as a ring nut is used for locking. 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 ring nut and washer have not been deformed. Oil the screws and assemble the locking device as originally supplied. ® SIT-LOCK 9 Internal Locking Device - Not Self-centring d Dmin D X d D1 D H H1
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