Overview
ISO 9119:1990 specifies requirements and test methods for the binding mounting area of cross-country skis. It defines the area on the ski where parts of toe-clip bindings (in accordance with ISO 6960) may be mounted, sets dimensional and surface requirements, and describes mechanical tests to verify screw retention and stripping resistance. Alpine skis are explicitly excluded.
Key topics and technical requirements
- Scope and compatibility
- Applies to cross-country skis with binding attachment by screws (and other fasteners where noted). Ensures compatibility between skis and toe-clip bindings meeting ISO 6960.
- Designated mounting area
- The ski manufacturer must mark a mounting point (MP) or use the ski balance point (BP) if no mark exists.
- Two nominal ski-length groups are covered: ~1300–1750 mm and ~1750–2200 mm, with different minimum area dimensions for each group.
- Dimensional limits
- Minimum width of the binding mounting area: 33 mm.
- Minimum mark line length perpendicular to ski axis: 30 mm.
- Where a mounting scale is used, extend the area 40 mm rearward and 70 mm forward beyond the scale limits.
- Minimum drill hole diameter for tests: 3.6 mm H12 (or as recommended by the ski manufacturer).
- Thickness and hole depths
- Minimum drill/penetration depths are specified by ski length group to ensure adequate screw engagement (test drill depths and values are given in the standard).
- Strength and failure criteria
- Screw retention strength is verified in a quasistatic tensile test (loading rate 5 mm/min ±20%) using a self-aligning test fixture.
- Minimum stripping resistance of the ski thread: 3.5 N·m.
- Test screws and attachment elements must comply with ISO 10228 and related test-screw provisions.
- Test procedure and reporting
- Sampling: at least three pairs of skis; data published from at least ten measurements where indicated.
- Test report must identify the ski, test machine, test locations, results and any deviations from the standard.
Practical applications - who uses this standard
- Ski manufacturers: to design and mark the binding mounting area and locate internal reinforcements.
- Binding designers and suppliers: to ensure interface compatibility (screw positions, diameters, depths) with compliant skis.
- Test laboratories and quality assurance teams: to perform retention and stripping tests during production control or certification.
- Importers/retailers and standards bodies: for verifying declared compliance and product safety.
Related standards
- ISO 6960 - Cross-country ski bindings with three pins (interface/dimensions)
- ISO 6289 - Skis: terms and definitions
- ISO 10228 - Cross-country skis: test screws
- ISO 7794 / ISO 7795 - Ski binding screws: requirements and test methods
Keywords: ISO 9119:1990, cross-country skis, binding mounting area, screw retention strength, stripping resistance, test methods, binding compatibility.
