216 GD-4 Overview The Power of Torsional Dampening Lovejoy is pleased to be able to provide quality grid couplings covering a large number of industry standard sizes and lengths. The Lovejoy grid style coupling has proven itself in performance and popularity over a wide range of applications. Lovejoy’s grid style coupling design has demonstrated its ability to dampen vibration by as much as 30% and can cushion shock loads that could cause damage to both the driving and driven equipment. The tapered grid spring design absorbs impact energy by spreading the energy out over the full length of the grid spring thus reducing the magnitude of the torque spikes. The Lovejoy design uses a curved hub tooth profile which creates a progressive contact with the flexible grid spring as the application torque increases. This feature provides a more effective and efficient transmission of power in properly aligned couplings. Lovejoy’s versatile design of industry standard hubs and grid springs for both horizontal and vertical cover styles allow Lovejoy couplings to be interchangeable with other industry standard grid couplings and components. Proper grid coupling installation and maintenance can add to a longer coupling life. Grid spring replacement is simple and can be performed at a fraction of the cost and time of a complete coupling. Features ■■High tensile, shot-peened alloy steel grid springs and precision machined hubs ensure superior coupling performance and long life. ■■Lovejoy’s grid couplings with tapered grids are designed to be interchangeable with other industry standard grid couplings with both horizontal and vertical grid covers. ■■Lovejoy grid couplings are designed for ease of installation and maintenance reducing labor and downtime costs. ■■The torsional flexibility and resilience of Lovejoy grid couplings helps reduce vibration and cushions shock and impact loads. ■■Cover fasteners can be provided in either Inch or Metric sizes. ■■Excellent for use in applications where the equipment is close coupled or spaced apart requiring a spacer style coupling arrangement. ■■Stock spacer designs are available or requests for custom spacer lengths can be addressed by Lovejoy engineering. Horizontal Split Cover Design ■■Ideal for limited space ■■Allows easy access to the grid spring ■■Well suited for reversing applications ■■Lightweight die-cast aluminum grid cover Vertical Split Cover Design ■■Ideal for higher operating speeds ■■Allows easy access to the grid spring ■■Cover is manufactured from stamped steel for strength Full Spacer Design – Horizontal Cover ■■Drop-out design ideal for pump applications and servicing ■■Stock sizes 1020 thru 1090 ■■Lightweight die-cast aluminum grid cover Half Spacer Design – Horizontal Cover ■■Offers additional BSE dimensions ■■Lightweight die-cast aluminum grid cover JW JIS CJ SF MC G HP GD D T SP UJ VSD R SLD ED JW JIS CJ SF MC G HP GD D T SP UJ VSD R SLD ED WARNING You must refer to page GD-2 (page 214) for Important Safety Instructions and Precautions for the selection and use of these products. Failure to follow the instructions and precautions could lead to severe injury or death. www.jbj.co.uk/gridcouplings.html
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