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2025From a Facebook group: Steadicam operators group

Rubber-band suspension arm with adjustable anchor points: first impressions versus spring-based and competing band designs.

DisputedParticipants disagreed and reached no conclusion. Read the findings as positions, not as an answer.

What the thread found

  • The arm bones are drilled with holes to allow repositioning of band anchor points, enabling tuning of arm behavior.
  • The prototype had overly stiff elbow pads; the manufacturer incorporated operator feedback to soften them.
  • After several weeks on a feature film, operators reported significantly softer end stops at top and bottom and a much greater boom range compared to a GPI PRO Arm, though band tuning takes longer than hex-key adjustment and requires habituation.
  • Compared to the NB Arm, the rubber-band arm exhibits similar mass and principle, different band characteristics and parallelogram geometry, slightly lower weight, and subjectively slightly better iso-elastic feel.
  • Participants debated whether the design represents independent development or adaptation of the NB Arm principle.

Depends on

  • Comparison baseline is operator experience with GPI PRO Arm and NB Arm
  • Assessment based on several weeks of production use, not long-term durability data

Gear in this thread

NB Stabilizer Armcatalog

Same gear or parts

  1. 2026Rocket Arm (elastic band arm) versus traditional spring arms like the G70x: performance, weight, build, and design dispute.DisputedFacebookThe Steadicam Group
  2. 2025Removing the post tensioner from an NB-Arm to replicate PRO-Arm feel for operators switching models.FacebookThe Steadicam Group
  3. 2022Arm section lengths (pivot-center to pivot-center) in PRO, Tiffen, Xarm, and NB models: whether larger boom range derives from longer sections or wider opening angles.FacebookThe Steadicam Group
  4. 2021Comparison of Steadicam arms for use with Arri Alexa EV and Cinema Products 509 sledGeneral Discussion
Original thread on Facebook (group members only)Ask about this threadThe answer cites the archive