What the thread found

• The Tiffen Steadicam® M2 Volt gimbal supplied in late 2021 came equipped with a Kaydon bearing in the pan axis that appeared visually identical to the bearing supplied by PRO, making a retrofit unnecessary at that time.
• One operator had the bearing inspected by a technician who confirmed visual similarity, but the bearing's specification (tolerances, preload, and cage material) could not be verified without disassembly.
• The industry assumption is that Tiffen switched from a lower-cost bearing with metal or plastic cage construction to Kaydon bearings after complaints.
• PRO gimbal bearings are proprietary specifications: outer dimensions follow a standard, but tolerances, preload, and cage design are PRO-specific and custom runs are available only in large quantities.
• An older Steadicam® M1 from several years prior also used a Kaydon bearing with a slightly different cage design and functioned well after cleaning and re-greasing.
• A PRO bearing from 2013 that had run dry for seven years rotated more freely than a newer PRO bearing after cleaning and now runs well in an M2.
• Newer Tiffen gimbals exhibit very low friction characteristics, and newer Volt drive units have significantly stiffer belts with simpler tension adjustment.

Depends on

• Whether the M2 bearing is functionally identical or merely visually similar to the PRO specification remains unconfirmed without bearing disassembly.
• Kaydon bearing availability for proprietary specifications depends on production volume.
• Bearing performance depends on assembly grease, preload, and cage material, which may vary between suppliers and production batches.

Gear in this thread

Voltcatalog

Parts

Gimbal Bearing

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