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