BS EN ISO 4210-5:2014 pdf download

BS EN ISO 4210-5:2014 pdf download.Cycles -Safety requirements for bicycles Part 5: Steering test methods (Iso4210-5:2014).
4.9 Handlebar and stem assembly — Fatigue test
4.9.1 Test method For city and trekking, young adult, and mountain bicycles
4.9.1.1 Test method For stage I
Unless the handlebar and stem are permanently connected. e.g. by welding or brazing, align the grips of pornon of the handlebar in a plane perpendicular to the stem axis Isee Figure 3 a)I and secure the handlebar to the stem according to the manufacturer’s instructions.
Clamp the handlebar stem securely in a fixture to the minimum insertion depth as specified In ISO 4210-2:2014,4.7.3, or in the case of a stem extension which is intended to be clamped to an extended fork steerer, secure the extension using the manufacturer’s recommended tIghtening procedure to an extended fork steerer which Is secured In fixture to the appropriate length.
For handlebars where the manufacturer states that they are not Intended for use with bar ends, apply fully reversed forces of F6 at a position 50 mm from the free end for each side of the handlebar For 100 000 cycles, with the forces at each end of the handlebar being out of phase with each other and parallel to the axis of the fork steerer as shown In Figure 10 a). The forces are given In Table 7. The maximum test Frequency shall be maintained as specified in ISO 4210-3:2014, 4.5.
Whereablcycle manulacturerlitsbarends.flt thebarendstothehandlebaraccordingtothe manufacturer’s tightening instructions but with the bar ends located in a plane perpendicular to the handlebar stem axis and apply the out-of-phase forces to the bar ends, as shown in Figure 8 and Figurella).
Where a handlebar manufacturer specifies that his handlebars are suitable for use with bar ends, conduct the test with the out-of-phase forces applied to simulated bar ends, as shown in Figurei.lb).
lithe handlebar meets the requirement as specified in ISO 4210-2:2014,4.7.7.2, remove any bar ends and conduct stage 2 of the test with the assembly in the same mountings.
4.9.2 Test method For racing bicycles
4.9.2.1 Test method For stage 1
Unless the handlebar and stem are permanently connected. eg. by welding or brazing, align the hand grips orthe equivalent parts ofthe handlebar in a plane perpendicular to the steeringaxis (see Figure 12) and secure the handlebar to the stem according to the manufacturer’s instructions.
Clamp the handlebar stem securely in a fixture to the minimum insertion depth as specified in ISO 4210-2:2014.4.7.3. or in the case of a stem extension which Is intended to be clamped to an extended fork steerer, secure the stem-extension using the manufacturer’s recommended tightening procedure, to an extended fork steerer which is secured in the fixture with the appropriate length projecting.
Attach to the handlebar two suitable devices that reproduce the brake-lever fixtures without either reducing or increasing the local handlebar strength. Each device shall incorporate a pin for connection to a ball joint with its axes located 15 mm from the outer surface of the handlebar, or such greater distance which accurately reproduces the position of the appropriate brake lever pivot (see Figure 12),
Through the ball joints, apply reversed forces ofF6 to the pin of the device on each side of the handlebar for 100 000 cycles, with the forces at each side of the handlebar being out of phase with each other and parallel to the axis of the fork steerer as shown in Figure ha). The forces are given in Tablej. The maximum test frequency shall be maintained as specified in ISO 4210-3:2014. 4.5.
If the assembly meets the requirement as specified in ISO 4210-2:2014,4.7.7.2, conduct stage 2 of the test on the same assembly. In the same mountings.
4.9.2.2 Test method for stage 2
Through the ball joints, apply reversed forces ofF7 to the pin of the device on each side of the handlebar for 100 000 cycles, with the forces at each side of the handlebar being In phase with each other and parallel to the axis of the handlebar stem of the fork steerer, as shown in Figure 13 b). The forces are given in Table 7. The maximum test frequency shall be maintained as specified in ISO 4210-3:2014, 4.5.