ISO 1050-1975 PDF
Name in English:
St ISO 1050-1975
Name in Russian:
Ст ISO 1050-1975
Original standard ISO 1050-1975 in PDF full version. Additional info + preview on request
Full title and description
ISO 1050:1975 — Continuous mechanical handling equipment for loose bulk materials — Screw conveyors. This International Standard specifies the recommended values of the main dimensions of elements of screw conveyors used for continuous handling of loose bulk materials and is available in PDF form as the 1975 first edition.
Abstract
Defines recommended (preferred) dimensional values for screw conveyor components (screw flights, shafts, troughs, pitches and clearances) to promote interchangeability and common design practice for continuous mechanical handling equipment for loose bulk materials. The document is brief (two pages) and derives from the earlier ISO Recommendation R 1050 (1969).
General information
- Status: Published — International Standard (confirmed in ISO systematic review, most recently confirmed in 2025; remains current).
- Publication date: October 1975 (first edition — 15 October 1975 as published).
- Publisher: International Organization for Standardization (ISO).
- ICS / categories: 53.040.10 (continuous mechanical handling equipment for loose bulk materials).
- Edition / version: Edition 1 (ISO 1050:1975).
- Number of pages: 2.
Scope
This standard lays down recommended (preferred) dimensional values for the main components of screw conveyors used for continuous handling of loose bulk materials. Its purpose is to harmonize principal sizes — such as screw diameter and pitch, trough dimensions and mounting clearances — to aid designers and manufacturers in specifying and producing compatible components. It is a dimensional/recommendation standard rather than a test or performance specification.
Key topics and requirements
- Recommended main dimensions for screw conveyor elements (screw flights, shaft diameters, pitches and trough sizes).
- Preferred series of sizes to promote interchangeability between manufacturers.
- Applicability limited to continuous mechanical handling of loose bulk materials (not a safety or performance test method).
- Successor of ISO Recommendation R 1050-1969 (technically identical transformation into an International Standard).
Typical use and users
Used by mechanical engineers, conveyor and bulk-handling equipment designers, manufacturers of screw conveyors and components, procurement specialists specifying conveyor equipment, and standards librarians. It is typically consulted when selecting standard screw sizes or designing trough and shaft interfaces to match commonly accepted dimensions.
Related standards
Other ISO standards covering continuous mechanical handling equipment and related conveyor types (e.g., standards on vibrating conveyors and other bulk-handling devices) are contextually related; ISO 1050 replaced ISO Recommendation R 1050-1969. See the ISO catalogue listings for related conveyor standards developed under ISO/TC 101.
Keywords
screw conveyor; bulk materials handling; conveyor dimensions; screw flight; pitch; trough size; ISO 1050; continuous mechanical handling equipment.
FAQ
Q: What is this standard?
A: ISO 1050:1975 is an International Standard that gives recommended dimensional values for screw conveyors used in continuous handling of loose bulk materials.
Q: What does it cover?
A: It covers the preferred/main dimensions of screw conveyor elements (screw diameters, pitches, trough dimensions and related clearances) to promote harmonized sizes and interchangeability of parts; it is not a performance or safety test standard.
Q: Who typically uses it?
A: Mechanical and design engineers, conveyor manufacturers, procurement and maintenance teams involved with bulk material handling systems, and standards administrators.
Q: Is it current or superseded?
A: As published in October 1975 (Edition 1), ISO 1050:1975 remains a published International Standard; ISO records show the standard was reviewed and confirmed in ISO's systematic review process (most recently confirmed in 2025), so the 1975 edition remains current.
Q: Is it part of a series?
A: It is part of the body of ISO work on continuous mechanical handling equipment developed under ISO/TC 101 and is the transformed successor to ISO Recommendation R 1050-1969; other conveyor-related ISO documents cover vibrating conveyors, feeders and other bulk-handling equipment.
Q: What are the key keywords?
A: Screw conveyor, bulk materials, conveyor dimensions, screw flight, pitch, trough, ISO 1050.