What the thread found

• Binding in a telescoping center post can result from the inner sleeve friction mechanism becoming sticky and may be resolved with silicone-based lubricant applied to both ends of the tube
• Out-of-round tubing, even by minimal tolerances, causes binding during extension and contraction of telescoping posts
• Over-tightening external clamps such as docking rings, monitor brackets, and gimbals can deform aluminum posts and create binding
• Dents in the post material will cause binding during telescoping motion
• Debris and lack of maintenance contribute to binding in moving parts of Steadicam rigs
• Aluminum posts are more prone to out-of-roundness than carbon fiber posts unless centerless ground during manufacturing
• Loosening the monitor bracket and docking ring tension can sometimes improve but not fully resolve binding caused by post geometry issues

Depends on

• The solution involving silicone spray application was specific to one user's experience with an internal sleeve tension mechanism
• Post age and manufacturing history affect the likelihood and type of binding issues
• The distinction between outer and inner post deformation requires partial disassembly to diagnose
• Rental equipment may have accumulated debris and damage not present in personally maintained rigs

Parts

Monitor Bracket, Docking Ring

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