ISO 8945:1989

Overview - ISO 8945:1989 (Rotary cultivator blades - Fixing dimensions)

ISO 8945:1989 is an international standard that defines the fixing dimensions for rotary cultivator blades used in agricultural tillage equipment. It applies specifically to blades that have two fixing holes, and it sets the required arrangement, dimensions and tolerances for four blade types. Dimensions are given in millimetres and illustrated in the standard’s figure and table (figure 1 and table 1).

Keywords: ISO 8945, rotary cultivator blades, fixing dimensions, cultivator blade dimensions, agricultural machinery standards.

Key topics and technical requirements

• Scope and applicability

  • Covers agricultural rotary cultivator blades with two fixing holes.
  • Specifies four distinct blade types (Types 1–4) and their fixing arrangements.

• Fixing hole arrangement

  • The positional relationship and layout of the two fixing holes are defined graphically (figure 1 in the standard).

• Dimensional data and tolerances

  • Table 1 in ISO 8945 lists the precise dimensions and manufacturing tolerances for each blade type.
  • All dimensions are expressed in millimetres to ensure consistent manufacture and interchangeability.

• Standardization intent

  • Ensures consistent hole sizes, spacing and tolerances so blades from different manufacturers are compatible with common rotary cultivator hubs and flanges.

Applications and practical value

• Manufacturing and design
  • Use ISO 8945 as a reference for designing blade blanks, drilling fixtures and production drawings to meet accepted interchangeability requirements.
• Aftermarket and spare parts
  • Enables aftermarket suppliers and OEMs to produce replacement blades that fit existing cultivator equipment without custom modification.
• Procurement and quality control
  • Procurement teams can specify compliance with ISO 8945 in purchase orders to ensure dimensional conformity.
  • Quality inspectors use the standard’s tolerances for acceptance testing and incoming inspection.
• CAD and reverse engineering
  • Designers creating CAD models or reverse-engineering cultivator components can rely on the standard dimensions to produce compatible parts.

Who should use this standard

• Agricultural machinery manufacturers and OEMs
• Component and spare‑parts suppliers
• Design and mechanical engineers working on tillage equipment
• Quality assurance and inspection teams
• Procurement specialists specifying cultivator blades

Related standards

ISO 8945 was prepared by ISO/TC 23 (Tractors and machinery for agriculture and forestry). Related documents would include other ISO standards covering agricultural machinery dimensions, blade materials, performance and safety-consult ISO/TC 23 catalogs for complementary standards.

For precise dimensions, tolerances and the figure/table illustrations, refer to the official ISO 8945:1989 publication.