ISO 5611-8:2015

Overview

ISO 5611-8:2015 specifies requirements for cartridges, type A, style S, designed to hold indexable inserts with a cutting-edge angle κr = 45° (end cutting). The standard covers cartridges with hole(s) for fastening screw(s) and is focused on components used primarily for internal turning. Cartridges are intended for inserts made of hard metal, ceramic or other cutting materials.

Key topics and technical requirements

• Scope and purpose: Defines geometry, designation, material and marking rules for type A, style S cartridges used with indexable inserts.
• Cutting-edge geometry: Style S corresponds to a cutting-edge angle of 45° for end cutting (κr = 45°).
• Dimensions: Detailed dimensional tables specify heights (h) and related parameters for many standard sizes (h = 6, 8, 10, 12, 16, 20, 25 mm, etc.). Manufacturers must observe the numerical dimensions even if pictorial representations vary.
• Methods of holding: Letter symbols identify clamping method:
  • S - screw clamping through hole
  • C - top clamping (for certain clearances)
  • P - hole clamping
• Corner radius (r): Table of allowed corner radii for inserts and corresponding cartridge dimensions; nominal radii examples include 0.4 mm, 0.8 mm and 1.2 mm (converted inch equivalents are provided in the standard).
• Material: Cartridges shall be made of steel with a tensile strength of at least 1 200 N/mm².
• Adjusting screw: Optional adjustment screw to set the cartridge position in the f dimension (manufacturer’s option).
• Extent of delivery & marking: Cartridges must be supplied with complete clamping devices and adjusting screws; marking must include letter symbol and manufacturer name/trademark. Packaging shall reference the general ISO 5611 number.

Practical applications and who uses this standard

ISO 5611-8:2015 is used by:

• Tool and cartridge manufacturers to design, produce and certify compatible cartridges for indexable inserts.
• Machine tool builders specifying internal turning tool systems.
• Production engineers and CAM programmers selecting tooling for internal turning operations.
• Procurement, quality and compliance teams ensuring interchangeability and conformity across suppliers. Practical benefits include improved interchangeability of cartridges and inserts, clearer designation codes (example: Cartridge ISO 5611–8 – STSCR 12CA – 16), and reduced tooling errors in internal turning operations.

Related standards

• ISO 5611-1 - General survey and dimension determination
• Other parts of ISO 5611 (Parts 1–12) covering different cartridge styles
• ISO 5608 - Designation for turning and copying tool holders and cartridges
• ISO 1832 - Designation for indexable inserts

Keywords: ISO 5611-8:2015, cartridges type A, indexable inserts, style S, cutting edge 45°, internal turning, tool holders, insert clamping, ISO tooling standards.