ISO 5610-8:2014

Overview

ISO 5610-8:2014 - "Tool holders with rectangular shank for indexable inserts - Part 8: Style K" defines the geometry, designation and basic requirements for rectangular-shank tool holders, style K. Style K holders feature an offset shank and a cutting edge angle κ = 75° optimized for end cutting and turning operations. The standard covers holders intended for indexable inserts (typically hardmetal/carbide or other cutting materials) mounted by clamping.

Key topics

• Scope and purpose: Specifies dimensions and design rules for style K tool holders used with rhombic (C) and square (S) indexable inserts for turning.
• Geometry and dimensions: Detailed dimensional tables for common insert shapes and sizes (height, width, cutting-edge length, etc.). Symbols and measurement rules cross-reference ISO 5610-1.
• Cutting-edge angle & shank: Defines offset shank geometry and the 75° cutting edge angle for end cutting.
• Corner radius and insert lengths: Gives recommended corner radii for common cutting-edge lengths; nominal radii and inch conversion values are provided.
• Material requirement: Tool holder material should be steel with tensile strength of at least 1 200 N/mm².
• Mounting and clamping: Standard mounting types are specified in the dimension tables; other mounting types permitted by agreement but must be designated per ISO 5608.
• Designation system: Prescribes a concise designation format (e.g., Tool holder ISO 5610-8 - SCKCR 1010 E06) combining mounting type, insert shape, style, clearance, hand, and dimensional codes.
• Delivery & marking: Holders are supplied complete with clamping device but without inserts; marking must include the letter symbol and manufacturer’s name/trademark; packaging should reference ISO 5610-8:2014.
• Tolerances and measurement: Tolerances for key dimensions are specified with measurement using master insert and master shim where applicable.

Applications and users

ISO 5610-8 is used by:

• CNC tooling designers and toolhouse engineers specifying tool holders for turning and end-cutting.
• Cutting-tool and insert manufacturers ensuring compatibility with standardized holders.
• Machine shops and production engineers selecting holders for carbide/indexable-insert turning operations.
• Procurement and quality departments that require unambiguous product designation and interchangeability.

Practical uses include designing, specifying and ordering standardized rectangular-shank tool holders (style K) for turning, facing and end-cutting tasks to ensure interchangeability across suppliers.

Related standards

• ISO 5610-1:2014 - General survey and dimension determination
• ISO 5608:2012 - Designation for turning tool holders and cartridges
• ISO/TS 13399-2 and -3 - Cutting tool data representation
• ISO 883, ISO 3364, ISO 6987 - Indexable insert dimension standards

Keywords: ISO 5610-8, tool holders, rectangular shank, indexable inserts, style K, 75° cutting edge, turning operations, clamping, carbide inserts.