ISO 2586:1985

Overview

ISO 2586:1985 - "Shell end mills with plain bore and tenon drive - Metric series" is an international standard that defines the dimensional and interchangeability requirements for metric-series shell end mills with a plain bore and tenon drive. Published as the second edition in 1985, it applies specifically to solid steel cutters intended to fit cutter arbors manufactured to ISO 240. The document gives dimensions and tolerances in millimetres and addresses key features needed to ensure mechanical compatibility and safe mounting.

Key topics and technical requirements

• Scope: Applies to metric-series shell end mills with a plain bore and tenon drive, limited to solid cutters in steel. Other cutter types (solid with inserted blades, brazed tips, or indexable inserts) are excluded and covered by future standards.
• Interchangeability: Specifies dimensional compatibility for mounting on cutter arbors/mandrels per ISO 240 to ensure interchangeability across manufacturers.
• Dimensions and tolerances: Provides dimensions and tolerances in millimetres for tenon seating and bores. (The second edition updated tolerances from the first edition.)
• Tenon seating: Tenon seatings must conform to the metric series specified in ISO 240.
• Teeth geometry: Notes that these cutters have helicoidal teeth and are produced with right- or left-hand helix orientation.
• Optional features: Allows an optional 0.5 mm backing-off on the rear face where applicable.
• Standardization process: Prepared by ISO/TC 29 (Small tools), ensuring alignment with related milling cutter standards.

Applications

ISO 2586:1985 is practically valuable for:

• Tool designers and manufacturers who need to produce shell end mills that reliably fit standard cutter arbors.
• Tooling suppliers and distributors ensuring products meet international interchangeability requirements.
• Machine shops and contract manufacturers selecting end mills that will properly mount on existing arbors and mandrels.
• Procurement and quality engineers verifying dimensional conformity and supplier compliance.
• CNC programmers and maintenance staff who require assurance of correct mounting and tool orientation (right/left helix) for milling operations.

Using ISO 2586:1985 reduces the risk of mismatched tooling, improves spare-part compatibility, and simplifies tooling logistics across international supply chains.

Related standards

• ISO 240 - Cutter arbors / mandrels - interchangeability dimensions (tenon seating reference).
• ISO 523 - Recommended range of outside diameters for milling cutters (diameter range reference).
• ISO 2700 - Milling cutters with tenon drive - interchangeability dimensions with cutter arbors.
• Other standards cover cutters with brazed tips, inserted blades or indexable inserts.

Keywords: ISO 2586:1985, shell end mills, plain bore, tenon drive, metric series, milling cutters, interchangeability, ISO 240, cutter arbors, dimensions, tolerances.