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Filmmaking Dictionary: Number 1 / 1-1/8″ Junior Pin / Receiver
Definition
A junior pin and matching junior receiver form a common mounting connection in film lighting and grip equipment. The nominal pin diameter is 1⅛ inches, often described in equipment specifications as approximately 28 mm.
The pin is the projecting male component; the receiver is the female socket that accepts it. The junior standard is larger than the familiar ⅝-inch baby mounting standard.
Where the Connection Is Used
Junior fittings appear on stands, fixture yokes and grip hardware intended for a range of larger or heavier equipment. A stand may include a junior receiver alone or a combination arrangement that also supports baby-mounted accessories.
The presence of a junior connection does not establish the allowable weight of the whole setup. The stand, fitting, fixture, adapters, extension and mounting orientation each affect whether the arrangement is suitable.
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Junior Versus Baby
- Junior: Nominal 1⅛-inch pin and compatible receiver.
- Baby: Nominal ⅝-inch mounting standard.
- Adapter: A component designed to join particular mounting types.
- Complete support: The full chain from the equipment to its supporting structure.
An adapter changes the connection available; it does not automatically increase the capacity of the smaller or weaker component. Use hardware intended for the job and follow the component manufacturers’ requirements.
Checking the Mount
Confirm that the pin and receiver are compatible and in good condition. The connection must seat as intended, and its securing hardware must operate correctly. A pin that is only partly inserted or a damaged locking mechanism is not fixed by calling the fitting ‘junior’.
The key grip and lighting team also consider the equipment’s centre of gravity, stand arrangement and any required secondary retention. Overhead or unusual mounting needs an appropriate rigging plan; a familiar socket size is not that plan.
Example During Prep
A fixture arrives with a junior mounting pin, but the selected stand has only a baby top. The crew needs a compatible, suitably rated support arrangement. They do not assume that any available adapter makes the combination acceptable.
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Frequently Asked Questions
Does junior always mean a 2K tungsten light?
No. ‘Junior’ can also describe a traditional 2,000-watt fixture. The mounting term refers to hardware geometry, not wattage.
Can I identify a safe load from the pin diameter alone?
No. Check the ratings and instructions for the entire support arrangement.
Related Terms
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