ISO 26622-2:2008

Overview - ISO 26622-2:2008 (Modular taper interface with ball track system)

ISO 26622-2:2008 specifies the dimensions and designation of tapered receivers for the modular taper interface with ball track system used for automatic and manual tool exchange on machine tools (e.g., lathes, drilling machines, milling machines and turn/milling centres). The standard defines a range of nominal receiver sizes and the dimensional, tolerance and marking rules that ensure interchangeability and consistent performance of modular taper tool interfaces.

Key topics and technical requirements

• Receiver dimensions and sizes: Dimensional data for nominal sizes 32, 40, 50, 63, 80 and 100 mm are given (see Table 1 in the standard). Dimensions are defined for the tapered receiver geometry and key features.
• Tolerancing: Form, orientation, location and run-out tolerancing follow ISO 1101. Unspecified linear/ angular tolerances follow ISO 2768-1 (class “m”) and geometrical tolerances follow ISO 2768-2 (class “k”).
• Torque transmission: Torque is transmitted by friction, locking elements and keys; clamping system design and force directly affect torque capacity.
• Clamping force guidance (Annex A): Recommended clamping force ranges (kN) by nominal size:
  • Size 32: minimum 9, maximum 18
  • Size 40: minimum 13, maximum 27
  • Size 50: minimum 22, maximum 40
  • Size 63: minimum 36, maximum 58
  • Size 80: minimum 53, maximum 80
  • Size 100: minimum 75, maximum 110
• Material and heat treatment: Manufacturers should select material and heat treatment for strength, wear and toughness. A recommended minimum hardness is 48 HRC; receiver hardness should generally exceed shank hardness.
• Designation: Receivers are designated as: “Modular taper receiver ISO 26622-2 - TS <nominal size>” (example: TS 63).

Practical applications and users

• Who uses this standard:
  • Machine tool builders and spindle manufacturers
  • Tooling suppliers and modular shank manufacturers
  • Production, quality and maintenance engineers specifying quick-change tooling
  • CAD designers and procurement teams ensuring interchangeability
• Where it’s applied:
  • Quick-change tool systems for turning, milling and drilling
  • High-speed rotating tool interfaces and static tooling fixtures
  • Environments requiring precise repeatability, consistent clamping, and predictable torque/stiffness performance

Related standards

• ISO 26622-1 - Part 1: Dimensions and designation of shanks (complements Part 2)
• ISO 1101 - Geometrical tolerancing (GPS)
• ISO 2768-1 / ISO 2768-2 - General tolerances for dimensions and geometrical tolerances

ISO 26622-2:2008 provides the dimensional and designation foundation needed to design, specify and produce robust modular taper receivers with ball track systems for reliable tool exchange and predictable performance across machine tool platforms.