Page 57 - TBIS_15194-2019_(EN)_3nd

TBIS 15194:2019

4.3.6.7.3 Test method for Stage 1

Unless the handlebar and stem are permanently connected, e.g. by welding or
brazing, align the grips of portion of the handlebar in a plane perpendicular to the
stem axis (see Figure 12a)) 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, 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 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

handlebar stem as shown in Figure 17a). The forces are given in Table 9. The
maximum test frequency shall be maintained as specified in 4.3.1.5.

Where EPAC manufacturer fits bar-ends, fit the bar-ends to the handlebar according
to the 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 18a).
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 Figure 18b).

If the handlebar meets the requirement of 4.3.6.7.2, remove any bar-ends and
conduct Stage 2 of the test with the assembly in the same mountings.

4.3.6.7.4 Test method for Stage 2

Apply fully-reversed forces of F7 at a position 50 mm from the free end each side of
the handlebar for 100 000 cycles, with the forces at each end of the handlebar being

in phase with each other and parallel to the axis of the handlebar stem as shown in
Figure 17b). The maximum test frequency shall be maintained as specified in 4.3.1.5.

Table 9 — Forces on handlebars and bar-ends

Stage 1 Forces, F6 220 N

Stage 2
Forces, F7 280 N

第 49 頁共 162 頁