SM Maintenance-Free Axle Assemblies We Offer New Maintenance-Free Axles For All On-Track Equipment. Some of the benefits of them are: Maintenance-Free Axle Bearings Increase Bearing Life And Prevents Over Or Under Greasing.Solid Spacers Between Bearing And Hubs To Prevent Axle Translation Standard.Tight Tolerance Axle Assembly Ensure Correct Fitment Of Axle Components And Improves Life.Internal Manufacturing Of Axles And Components Drastically Reduces Lead-Time Swingmaster Part H-699 Swingmaster Part H-704 & 705 Types of Maintenance-Free Axle assemblies Include:TRIPPCX SPIKERSP2RMAG CRANE Contact Us At (800) 457-1224 To Learn More About Our SM Maintenance-Free Axle Assemblies