Class XL 60 Case shafts are used with our rigid linear motion system. Regardless of the overall shaft length, diameter varies no more than .0005 inch depending on size. The roundness tolerance is .0002 inch and each Class XL shaft maintains a surface finish of 4-10 rms. We use only Series A self adjustable ball bushing bearings to provide high precision movement and increase load capacity and travel life. All Selectorized machine guide rods for weight stacks are industrial chromed to eliminate flaking and nickel plate bleed through.
Industrial chrome outlasts typical decorative chroming.
Pulleys Sonic welded pulleys are used on all pulley applications. All pulleys are cycle tested for over one million revolutions with 475 lb. of weight. All pulleys pass at a test weight of a 2000 lb. vertical load bearing test. All cables are nylon coated and tested to 2000 lbs. Weight Stacks Solid steel stacks are used on all selectorized strength machines.