EN 14766:2005 - 64_e_stf - Baltik vairas

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EN 14766:2005 (E)NOTE See also 4.10.2.4.9.3.2 Tyre-clearance test4.9.3.2.1 RequirementWhen tested by the method described in 4.9.3.2.2, the tyre shall not contact the crown of the fork.4.9.3.2.2 Test methodWith a wheel and tyre assembly fitted to the fork, apply a force of 2 800 N to the wheel in a direction towards thefork-crown and parallel to the axis of the fork stem. Maintain this force for 1 min.NOTE See also 4.10.2.4.9.3.3 Tensile test4.9.3.3.1 RequirementWhen tested by the method described in 4.9.3.3.2, there shall be no detachment or loosening of any parts of theassembly, and the tubular, telescopic components of any fork-leg shall not separate under the test force.4.9.3.3.2 Test methodMount the fork-stem securely in a suitable rigid mount, keeping any clamping forces away from the fork-crown, andapply a tensile force of 2 300 N distributed equally between the two drop-outs in a direction parallel to the axis ofthe fork-stem and in a direction away from the fork-crown. Maintain this force for 1 min.NOTE See also 4.10.2.4.9.4 Front fork – Static bending test4.9.4.1 RequirementWhen tested by the method described in 4.9.4.2, there shall be no fractures or visible cracks in any part of the fork,and the permanent set, measured as the displacement of the axis of the wheel-axle or simulated axle in relation tothe axis of the fork-stem, shall not exceed 5 mm for rigid forks or 10 mm for suspension-forks.4.9.4.2 Test methodMount the fork in a fixture representative of the head-tube and gripped in the normal head-bearings and fit aloading-attachment and swivel on an axle located in the axle-slots of the blades (see Figure 33). Locate adeflection measuring device under the loading-attachment in order to measure deflection and permanent set of thefork perpendicular to the stem axis and in the plane of the wheel.Apply a static, pre-loading force of 100 N to the roller perpendicular to the stem axis, against the direction of travel,and in the plane of the wheel. Remove and repeat this loading until a consistent deflection reading is obtained.Adjust the deflection measuring device to zero.Increase the static force to 1 500 N and maintain this force for 1 min, then reduce the force to 100 N and record anypermanent set.54
EN 14766:2005 (E)Key1 Loading-attachment to swivel on axle2 Deflection measuring device3 Rigid mount incorporating head bearings4.9.5 Front fork – rearward impact testFigure 33 — Front fork – static bending test (typical arrangement)4.9.5.1 Crown/stem joint assembled by welding or brazing4.9.5.1.1 RequirementWhen tested by the method described in 4.9.5.1.2, there shall be no fractures or visible cracks in any part of thefork, and the permanent set, measured as the displacement of the axis of the wheel-axle or simulated axle inrelation to the axis of the fork-stem, shall not exceed 45 mm.If the fork is used in the frame and fork assembly impact (falling-mass) test, 4.8.2, there is no need to perform thistest.55
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EN 14766:2005 - 64_e_stf - Baltik vairas

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