ISO 9980-2012 pdf free download

ISO 9980-2012 pdf free download.Belt drives — Grooved pulleys for V-belts
(system based on effective width) — Geometrical inspection of grooves
Transmissions par courroles — Poulies a gorges pour courroles trapézoidales (système base sur Ia largeur effective) — Contrôle géométrique des gorges.
The groove profile shall be checked using a limit gauge shown diagrammatically in Figure 2 or Figure 7.
A gauge for each of the standard angles applicable to each groove section in the corresponding International Standard is required.
The limit gauges shall be marked with the groove section and the groove angle.
3.2.2 InspectIon of grooves for sIngle V-belts The limit gauge is shown in Figure 2.
The a end of the limit gauge is used to check the minimum value of the groove angle. The gauge shall come into contact with the groove at the lower corners (see Figure 3) or be in contact uniformly along the sidewalls. The end of the limit gauge is used to check the maximum value of the groove angle, the effective width, the groove depth and the sidewall bevel depth. th2, in the same operation.
The groove angle, the effective width, the groove depth and the sidewall bevel depth. th2, comply with specifications if the corners of the gauge at width, w, contact the straight sidewalls of the groove (see Figure 4). The groove angle is too great if only the lower corners of the aax end of the gauge are in contact with the groove.
The effective width is too small or the sidewall bevel depth, th2, too great if the top corners of the gauge at width, w, lie above the straight sidewalls of the groove (see Figure 5).
The groove depth is too small if the gauge touches the bottom of the groove (see Figure 6).
3.2.3 Inspection of grooves for joined V-belts The limits gauge Is shown In Figure 7.
The a end of the limit gauge is used to check the minimum value of the groove angle. The gauge shall come into contact with the groove angle. The gauge shall come into contact with the groove at the lower corners (see Figure 3) or uniformly along the sidewalls.
The end of the limit gauge is used to check the maximum value of the groove angle, the effective width, the groove depth, the sidewall bevel depth, i2, and the groove land height, *, in the same operation.
The groove angle, the effective width, the groove land height, the sidewall bevel depth and the groove depth comply with specifications if the corners of the gauge at width, w, come into contact with the straight sidewalls of the groove (see Figure 8).
The groove angle is too great it only the lower corner of the ax end of the gauge comes into contact with the groove.
The groove land height, th1, is too great if the shoulder of the gauge comes into contact with the groove land without the gauge being seated firmly in the groove (see Figure 9).ISO 9980-2012 pdf free download.