Catalog – Components - Allied Automation, Inc.

Design ConsiderationsLoad CapacitiesRated Load CapacityThe dynamic load capacity of a LINTECH TRCAcarriage assembly is based upon having the loadforces centered on the carriage and the combineddynamic load capacity values of the SLBO or DLBOlinear bearings used. The rated values are based on aL 10 life of 2 million inches of travel (or 50 km) andwith the load forces applied downward onto the carriageassembly.Load Centered on CarriageFLoadLoadAFor a given carriage assembly, as the load force decreases,the life of the carriage assembly will increaseexponentially. The life of a carriage assembly, usedin an application, can be determined by reviewing theload considerations found on pages A-7 to A-10.Rated Moment LoadsWhen using a LINTECH TRCA carriage assemblyin an application, a moment load exists when the loadcenter of gravity is located away from the center ofthe carriage assembly. The life of a carriage assemblyis determined by the heaviest loaded linear bearing.Follow the steps below to determine if a specificTRCA carriage assembly will operate sufficiently in agiven application.Step 1: Calculate the forces acting on each of theindividual bearings for a given configuration andTRCA carriage assembly by using the equations onpage A-15.Step 2: Compare the calculated values with the rateddynamic load capacity values for the SLBO or DLBOlinear bearings used on the TRCA carriage assembly.Make sure the calculated values are below the ratedvalues. Note: If the calculated forces are acting onthe open end of a linear bearing, reduce the rateddynamic load capacity of that bearing by as shown onthe Polar Charts found on page A-10.Step 3: Follow the information on pages A-7 throughA-10 to determine the theoretical travel life of theselected carriage assembly in inches (or km) of travel.M RM PLoadLoadFLoad Center away from Carriage CenterM RLoadLoadLoadM RM PLoadLoadM YLoadLINTECH ®Positioning ComponentsA-13