Overview
SIST ISO 5670:1995 specifies the interchangeability dimensions and test pressure requirements for hydraulic single-acting telescopic tipping cylinders used in agricultural trailers. Applicable to 25 MPa (250 bar) series, it covers three main types of cylinders-Types 1, 2, and 3-to standardize dimensional characteristics and facilitate the selection, replacement, and manufacturing of these critical components for agricultural tipper trailers. By harmonizing these measurements, ISO 5670 helps reduce complexity in sourcing and replenishing hydraulic cylinders, promoting international consistency and efficiency in agricultural machinery design.
Key Topics
- Single-Acting Telescopic Tipping Cylinders: Focuses on hydraulic cylinders that provide linear extension for tipping mechanisms using a powered stroke, with extension occurring in single or successive stages.
- Interchangeability Dimensions: Prescribes fixed dimensional ranges for lengths, diameters, mounting points, and attachment features to ensure geometric compatibility between different manufacturers' components.
- Types of Cylinders:
- Type 1: Two-stage construction.
- Types 2 and 3: Two- or three-stage construction, with further sub classifications based on attachment methods and geometrical configuration.
- Test Pressure and Service Conditions:
- Service pressure fixed at 25 MPa (250 bar) for all types.
- Cylinders must withstand a test pressure defined by the standard.
- Dimensional Requirements: Details specific measurements for:
- Closed length
- Cylinder head clearance
- Mounting dimensions
- Piston rod diameter
- Pivot pin dimensions
- Oil Feed Orifice: Specifies dimensions compatible with standard pipe threads (G 3/8 per ISO 228-1 or M18 x 1.5 per ISO 965/2 and ISO 6149).
Applications
SIST ISO 5670:1995 finds practical use in the following areas:
- Agricultural Trailer Manufacturers: Enables standardized design for the hydraulic systems of tippers, ensuring parts are interchangeable and facilitating global distribution.
- Hydraulic Cylinder Suppliers: Assists component manufacturers in producing compatible cylinders that meet the demands of different trailer models and brands.
- Farm Equipment Maintenance: Simplifies spare parts inventory and replacement procedures, minimizing equipment downtime for end users.
- Engineering and Design: Streamlines the design process for new agricultural trailers by providing a clear framework for selecting and integrating hydraulic tipping systems.
- Procurement and Supply Chain: Supports efficient global supply chain management by enabling cross-brand compatibility and reducing the need for unique, custom-fabricated cylinders.
Related Standards
When implementing or referencing SIST ISO 5670:1995, additional relevant standards to consider include:
- ISO 228-1: Pipe threads where pressure-tight joints are not made on the threads-Designation, dimensions, and tolerances.
- ISO 965-2: General purpose metric screw threads-Limits of sizes for general purpose bolts and nuts.
- ISO 3320: Fluid power systems and components-Cylinder bores and piston rod diameters (metric series).
- ISO 6149: Fluid power systems and components-Metric ports-Dimensions and design.
Practical Value
The adoption of SIST ISO 5670:1995 delivers several benefits, including:
- Reduced Replacement Costs: Interchangeability ensures reduced need for custom parts.
- Streamlined Manufacturing: Manufacturers can focus on a limited range of cylinder types and dimensions, improving efficiency and inventory control.
- Improved Equipment Longevity: Ready availability of standard, tested hydraulic cylinders extends the operational life of agricultural tippers.
- International Compatibility: A common standard simplifies global trade and collaboration across agricultural equipment markets.
Using SIST ISO 5670:1995 as a reference promotes best practices in the agricultural machinery industry, ensuring safety, reliability, and cost-effectiveness in hydraulic tipping systems for agricultural trailers.