www.jbj.co.uk/couplings.html #DriveLineHarmony dw d d D H H1 M =Mr+2M 2 f 2 t tot t P = 2 Mt π d H µ w 2 w Features Composed of an inner ring and an outer ring. Comes with DIN 931/933 10.9 or 12.9 screws depending on the model. ® SIT-LOCK 14 versions ® SIT-LOCK 1422-1481 standard series (recommended version) ® SIT-LOCK 1423-1483 heavyweight series for high torque ® SIT-LOCK 1421 lightweight series for low torque. Coupling tolerances diameter d f7 diameter dw tolerances ≤ 160 mm H7 / h6 ≥ 160 mm H7 / g6 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 The table shows the Mt - Fax - Pw and Pn values for applications where the hub axially locks a part. For applications that do not require this function, SIT-LOCK® 5A or 5B is recommended. Surface finish Normal surface finish is sufficient. The following values are recommended: R ≤ 3.2 μm - R ≤ 16 μm a t Applications with bending moment For applications where there is a bending moment M while a torque M r is also transmitted, check that the M value is less than the transmissible torque f t t tot indicated in the table. Applying a bending moment 30% greater than the M value indicated in the table is not advised. t Recommended materials for shaft dw and hub d The pressure generated on diameter d generates a pressure Pw on the diameter dw, which allows the torque transmission Mt indicated in the table. The pressure generated on the diameter d is distributed over the surface of the diameter dw at an angle of approximately 16ｰ- 20ｰ. The pressure Pw can be determined using the following formula: 2 Shaft and hub materials with a σ ≥ 360 N/mm are recommended. For applications subject to bending moments, using tempered shafts is recommended, 0,2 such as steel 42 CrMo4. For further information or confirmation, please contact the jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk ® ® Advantages of SIT-LOCK 14 compared to SIT-LOCK 11 ® The SIT-LOCK 14 locking device can be installed even without a torque wrench. It is important that the flat surface of the inner ring aligns with the flat surface of the outer ring when installation is complete. ® SIT-LOCK 14 Shrink Disc 61
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