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
Same gear or parts
- 2026Rocket Arm (elastic band arm) versus traditional spring arms like the G70x: performance, weight, build, and design dispute.DisputedFacebookThe Steadicam Group
- 2025Removing the post tensioner from an NB-Arm to replicate PRO-Arm feel for operators switching models.FacebookThe Steadicam Group
- 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
- 2021Comparison of Steadicam arms for use with Arri Alexa EV and Cinema Products 509 sledGeneral Discussion