www.jbj.co.uk/couplings.html #DriveLineHarmony 40 Features Consisting of two tapered rings with splits, an inner ring and an outer ring, it is particularly suitable for applications that require extensive tolerance. The table shows performance data for the following tolerances: shaft d h7 - coupling seat on hub H7 and shaft d h11 - coupling seat on hub H11. The decrease in performance with h11/H11 tolerances is due to a partial loss of the radial force developed which is required to deform the tapers that are not split. 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 1 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. Installation with non-lubricated surfaces (dry) ® The SIT-LOCK 1 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 +15% and P , P -8% 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. High Radial loads ® The SIT-LOCK 1 locking device is not suitable for high radial loads. The taper angle, which is two times greater than the friction angle ϕ, would develop an additional axial force on the screws, which could lead to them breaking. 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 ® Applications with more than one SIT-LOCK 1 device Where two or more type 1 locking devices are mounted in a row, the total transmissible torque M is: t 1 device M = M indicated in catalogue t t 2 devices M = M indicated in catalogue ∙ 1.9 t t 3 devices M = M indicated in catalogue ∙ 2.7 t t 4 devices M = M indicated in catalogue ∙ 3.6 t 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. ® SIT-LOCK 1 Internal Locking Device - Not Self-centring ≥H D d Dmin H H1 H2 D d
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