www.jbj.co.uk/couplings.html #DriveLineHarmony 28 Features Composed of an inner ring and outer ring both with splits. This type of locking device is particularly suitable for applications that require excellent hub-to-shaft concentricity and perpendicularity. It is also used for locking hubs with lower mechanical properties. Allows the same hub, with the same external diameter, to be used on shafts of different diameters. Example: shaft diameter 30 mm: SIT-LOCK® 8 30 x 55 shaft diameter 20 mm: SIT-LOCK® 8 20 x 55 The table shows performance data for the following tolerances: shaft d h8 - coupling seat on hub H8 Designed for applications that require quick installation, resulting in lower costs. It has the following advantages over SIT-LOCK® 1: SIT-LOCK® 8 40 x 65 Transmissible torque: 1051 Nm Number of screws: 5 M8 SELF-Centering SIT-LOCK® 1 40 x 65 Transmissible torque: 1145 Nm Number of screws: 14 M6 NOT SELF-Centering Notes: using SIT-LOCK® 8 rather than SIT-LOCK® 1 allows for a 65% reduction in installation time and considerably lower application costs. High torque transmission With the same shaft size, e.g. 30 mm, it allows for higher torque transmission at a very low cost, for example: SIT-LOCK® 8 30 x 55 Mt = 473 Nm SIT-LOCK® 8 30 x 65 Mt = 789 Nm SIT-LOCK® 8 30 x 80 Mt = 1103 Nm 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 8 locking device is self-centring so it does not require a centring base between the shaft and hub. Installation with non-lubricated surfaces (dry) ® See SIT-LOCK 7 locking device specifications as they are the same. Axial displacement When tightening the screws there is no hub to shaft axial displacement. ® SIT-LOCK 8 Internal Locking Device - Self-centring Dmin d D1 D H1 H H0 H2
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