Overview
ISO 11497:1998 specifies requirements and test methods for the binding mounting area of telemark skis, bindings and retention devices. The standard is intended to optimize compatibility of the functional unit “ski - binding - retention device - boot” by defining dimensional, strength and surface requirements and by prescribing test procedures (pull‑out and stripping) to verify performance.
Key topics and technical requirements
- Mounting point: Manufacturers must mark the mounting point visibly on the ski (left side and/or top surface).
- Binding mounting area dimensions:
- Length: 110 mm forward and 300 mm rearward from the mounting point.
- Width: minimum 44 mm, symmetrical about the ski centreline.
- Center-to-center screw distances:
- Maximum (for ISO 7794 Ø6.3 mm screws): 36 mm perpendicular to centreline.
- Minimum: 26 mm longitudinal, 21 mm in other directions.
- Surface profile tolerances:
- Transverse deviations allowed only as a constant curve across width; no step within the central 44 mm.
- Longitudinal straightness tolerance: max 5 mm when base is on a flat surface.
- Material and hole requirements:
- Available drill hole depth in mounting area: 9.5 mm.
- Standard drill hole diameter: 3.6 mm H12 (manufacturer may specify alternative and must mark ski if different).
- Binding screw shaft penetration after mounting: (8.5 ± 0.5) mm.
- Mounting plate hole/countersink diameter: ≤ 7 mm; countersink penetration into top surface ≤ 0.6 mm.
- Strength requirements:
- Screw retention strength: minimum 2 200 N for two screws (quasi‑static load).
- Stripping resistance: minimum 5 N·m.
- Test methods:
- Pull‑out (tensile) tests at 5 mm/min using specified pull‑out fixture; sample size: three pairs of skis at 23 ± 5 °C.
- Stripping (torque) tests using a drill jig and friction plate per the standard.
Applications and users
ISO 11497:1998 is practical for:
- Ski manufacturers designing telemark skis and specifying mounting areas.
- Binding and retention device manufacturers ensuring hole patterns, screw selection and plate design meet compatibility and penetration requirements.
- Testing laboratories and certification bodies performing pull‑out and stripping tests to validate safety and durability.
- Product designers, R&D teams and quality assurance professionals assessing mechanical integrity of ski‑binding interfaces.
Using ISO 11497 improves safety, interoperability and consistency across telemark ski systems and supports regulatory and market acceptance.
Related standards
Normative references within ISO 11497 include: ISO 2632-1:1985, ISO 6289:1985, ISO 6506:1981, ISO 7794:1991, and ISO 10228:1991, which address roughness, ski terminology, hardness testing and binding screw specifications used in the test methods.