ISO 3639-1981 rus PDF

Full title and description

ISO 3639:1981 — Cinematography — Projection reels/spools 75 to 312 mm diameter for 8 mm Type S motion-picture film — Dimensions and specifications. A Russian-language edition/market listing exists under the designation "Ст ISO 3639-1981 / St ISO 3639-1981 (rus)".

Abstract

This International Standard specifies dimensional and interchangeability requirements for projection reels (spools) for 8 mm Type S motion-picture film covering flange diameters from 75 mm up to 312 mm (with a specific note about the 75 mm Type No. 7). The standard ensures reels are interchangeable on reel‑to‑reel projection equipment and recommends use of ISO 6033 for the size‑7 (75 mm) reel.

General information

• Status: Published (International Standard; action confirmed in ISO systematic reviews).
• Publication date: October 1, 1981 (1981‑10).
• Publisher: International Organization for Standardization (ISO), prepared by ISO/TC 36 Cinematography.
• ICS / categories: 37.060.10 — Motion picture equipment.
• Edition / version: Edition 1 (1981).
• Number of pages: 5 (official ISO publication length).

Key bibliographic and status details above are taken from the ISO bibliographic entry and public standards catalogues.

Scope

The scope covers dimensional requirements and specifications for projection reels/spools intended for 8 mm Type S motion‑picture film with outside flange diameters in the range 75 mm to 312 mm (the 75 mm Type No. 7 is treated specially and is referred to ISO 6033). The standard is intended to assure mechanical interchangeability of reels across projection equipment and to give manufacturers uniform dimensional requirements for spool construction.

Key topics and requirements

• Dimensional specifications for projection reel (spool) outside diameters and flange profiles for 8 mm Type S film (75–312 mm range).
• Interchangeability requirements so reels fit common reel‑to‑reel projection equipment.
• Special treatment/exception for the 75 mm (Type No. 7) reel and cross‑reference to ISO 6033 for size‑7 details.
• Guidance on flange/profile features that affect compatibility and manufacture (material/thickness considerations are noted in the specification).
• Normative references to related cinematography dimensional standards prepared by ISO/TC 36.

Typical use and users

Manufacturers of film projection reels and spools, projector and projector‑accessory manufacturers, film archives and preservation labs, cinematography equipment restorers, museums holding film collections, and technical specifications librarians use ISO 3639:1981 to ensure mechanical compatibility and to guide the manufacture, procurement and conservation of 8 mm Type S projection reels.

Related standards

Standards related to ISO 3639 include ISO 6033 (projection reel size 7 for 8 mm Type S — dimensions and specifications) and other cinematography dimensional standards such as ISO 1793 (reels for 16 mm projectors). The ISO cinematography portfolio contains additional complementary documents on spindles, image area, test films and projection performance.

Keywords

8 mm, Type S, projection reel, spool, flange diameter, reel dimensions, cinematography, ISO 3639, interchangeability, film preservation.

FAQ

Q: What is this standard?

A: ISO 3639:1981 is an international standard specifying dimensions and interchangeability requirements for projection reels/spools used with 8 mm Type S motion‑picture film.

Q: What does it cover?

A: It covers dimensional specifications for reels/spools with outside flange diameters from 75 mm up to 312 mm (the 75 mm Type No. 7 is specially noted and cross‑referenced to ISO 6033), and requirements intended to ensure reels are interchangeable across compatible projection equipment.

Q: Who typically uses it?

A: Reel and projector manufacturers, film archives, restoration specialists, museums, and procurement or standards teams specifying or sourcing 8 mm projection equipment and spools use this standard.

Q: Is it current or superseded?

A: The ISO bibliographic record shows ISO 3639:1981 as published and repeatedly reviewed; the ISO entry indicates the publication was last reviewed/confirmed in 2023 and remains current in the ISO catalogue. Users should consult the ISO catalogue or national standards bodies for the latest status in their territory.

Q: Is it part of a series?

A: It belongs to the suite of ISO cinematography/dimensional standards prepared by ISO/TC 36 and is related to other reel/spool and projection equipment standards (for example ISO 6033 for size‑7 reels and ISO 1793 for 16 mm reels).

Q: What are the key keywords?

A: 8 mm, Type S, projection reels, spools, flange, diameter, interchangeability, ISO 3639.