Catalog – Components - Allied Automation, Inc.

Design ConsiderationsLoad CapacitiesHardness factor - F HThe maximum travel life of a linear bearing is achievedwhen the shaft surface has a hardness value greater than (>)Rockwell 60C. This hardness assures that no shaft groovingor flaking will occur under normal operating conditions.LINTECHSL & SA & TRSAstandard shaftsstainless steel shaftschrome plated shaftsRockwellHardness60-65C50-55C67-72CF Hfactor1.00.521.00When using LINTECH bearings, pillow blocks, or TRCAcarriage assemblies with different shafting and hardnessratings, refer to the Shaft Hardness graph below for thecorrection factor.1.00.9Hardness factor - F HTemperature factor - F TAmbient temperatures over 212 0 F (100 0 C) will fatigue thelinear bearings, or carriage assembly, and will cause a decreasein travel life. LINTECH's linear bearings or carriageassemblies have a maximum operating ambient temperatureof 185 0 F. Therefore these bearings, or carriage assemblies,should never be used in ambient temperatures above 185 0F. Custom linear bearings or carriage assemblies, can beprovided for higher temperature applications.LINTECHLinear BearingsCarriage AssembliesMaximumOperating Temp.185 0 F185 0 FF TfactorWhen using LINTECH's SL shafting, SA, or TRSA shaftassemblies with different linear bearings and temperatureratings, a temperature correction factor may be required ifthe ambient temperature exceeds 212 0 F (100 0 C). Refer tothe Temperature graph below for the correction factor.11AHardness factor - FH0.80.70.60.50.40.30.20.160 50 40 30 20 10Temperature factor - FT1.00.90.80.70.6Temperature factor - F TShaft Hardness (Rockwell C)100 0 C212 0 F120 0 C248 0 F140 0 C284 0 F160 0 C320 0 F180 0 C356 0 F200 0 C392 0 FAmbient TemperatureLINTECH ®Positioning ComponentsA-9