What the thread found

• J-brackets flex under load, particularly with heavier camera packages, and flexing increases with longer arm posts and heavier payloads
• Underslung J-bracket installation using an arm post clamp reduces flexing compared to standard mounting by providing a single attachment point rather than two
• Arm posts longer than 12 inches become impractical due to increased flexing, operator discomfort, and potential risk of permanent deformation to the post or damage to arm bearings
• Lightweight arms like the Flyer are not engineered to handle the torque created by heavy cameras on long arm posts and should be used with caution in such configurations
• A 6 to 8 inch J-bracket length is practical for operational use as longer versions interfere with operator hand positioning
• Some arm posts have flexed under full load for extended periods without catastrophic failure, though this does not eliminate the associated risks

Depends on

• Discussion includes anecdotal accounts spanning multiple decades with varying arm models and designs
• Specific collar and adapter solutions mentioned were not confirmed as universally suitable
• The distinction between safe flexing and permanent deformation appears context-dependent on arm model and construction
• Exact specifications vary across manufacturers and time periods discussed

Gear in this thread

G-70catalog

Parts

Arm Post

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