Overview
ISO 10887:1999 specifies the dimensional characteristics and concentricity tolerance requirements for key type three-jaw drill chucks with either taper-bore or internal (inch) thread mounts. The standard defines three classes of chucks - Heavy (H), Medium (M) and Light (L) - and sets basic dimensions and designation, marking and testing rules for both chucks and their chuck keys.
Keywords: ISO 10887:1999, key type three-jaw drill chucks, drill chuck specification, concentricity tolerance, chuck keys, taper mount, internal thread mount
Key topics
- Scope and classes: Defines three use classes (H, M, L) to cover heavy machine tools, light industrial and DIY/portable tools.
- Mount types: Covers both taper mount (Morse or Jacobs tapers) and internal screw-thread (inch) mount types.
- Dimensional specifications: Provides overall dimensions and capacities for various chuck sizes and their keys.
- Concentricity tolerances: Specifies how to test accuracy using a test mandrel and Full Indicator Movement (FIM) at prescribed distances for different capacities and classes.
- Chuck keys: Defines three key types (tee, 90° bend, welded) with size tables and application classes.
- Designation rules: Standardized naming format for chucks (e.g., “Keyed chuck ISO 10887 - T - B12 - 6,5H”) and keys (e.g., “Chuck key ISO 10887 - T1 - N4”).
- Marking requirements: Permanent identification of manufacturer, capacity range and mount type on both chucks and keys.
Applications
- Manufacturers of drill chucks and chuck keys use ISO 10887 to design and produce parts that meet international interchangeability and performance expectations.
- Machine tool builders and toolroom managers use the standard to specify chucks for lathes, drill presses and portable drills.
- Purchasing and quality departments reference the standard for acceptance testing (concentricity FIM) and for verifying correct designation and marking of delivered chucks.
- Technical documentation, catalogs and procurement specifications benefit from the standardized designation and marking rules to reduce errors and ensure compatibility.
Who uses this standard
- Chuck and key manufacturers
- Machine tool OEMs and retrofitters
- Quality assurance and metrology labs
- Procurement specialists and maintenance engineers
Related standards
Normative references cited in ISO 10887 include:
ISO 10887:1999 helps ensure safe, accurate and interchangeable three-jaw drill chuck systems across industrial and consumer tool applications.