L-Loc Spline Shaft Clamping Feature For years spline shaft profile distortion and fretting were a major problem for hydraulic pump manufacturers. Now Lovejoy offers a simple solution: L-Loc. It is well known that normal manufacturing tolerances between the spline shaft and its mating spline coupling hub create unavoidable play. This play permits minor movements between the components. Compounding this tolerance related movement is misalignment and the hammering forces during power transmission. Eventually spline profile distortion occurs even with shafts and hubs of high quality hardened steel. When spline distortion and wear occur a decrease in pump efficiency results and abnormal stresses are placed on seals, bearings and other ngine/pump components. Equipment operation may become sluggish; horsepower and fuel are wasted. Premature maintenance or even failure of the shaft or other components may result. It appeared that the only way to eliminate spline distortion and wear was to eliminate the backlash and clearance related to mating tolerances and assembly misalignment, however, this became expensive, time consuming and was for the most part unsuccessful. The solution is the L-Loc. The Torsional coupling with the L-Loc spline-clamping hub can dampen harmful torsional vibrations, compensate for assembly misalignments and dramatically inhibit spline profile distortion. This unique design is remarkably simple but effective. The design of L-Loc consists of a unique slot that is placed slightly above and parallel to the spline bore. Two set screws are fitted perpendicularly into this slot. As the set screws are torqued, the spline shaft is “wrapped” with a clamping force around it’s entire profile. The hub becomes firmly locked around the spline shaft and the set screws never touch the spline profile. No dents, no gouges, no burrs, no hammering on and off “shrink fits” occur. The hub and shaft are absolutely free from play; a single assembly. By loosening the set screw, the clamping force is removed. TORSIONAL COUPLINGS L-LOC SPLINE SHAFT CLAMPING FEATURE 6 L-Loc Benefits 1 ) Eliminates premature spline shaft maintenance or replacement 2 ) Reduces stress on equipment components 3 ) Quick assembly and removal 4 ) Maintains equipment efficiency 5 ) Reduces equipment noise #DriveLineHarmony www.jbj.co.uk/torsional-couplings.html
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