PALAZZANI RAGNO XTJ 32 / C, Operation And Maintenance Manual

Page: 135 / 210

Palazzani
Palazzani Industrie spa
OM 601 pag 18 Cap 6
Check for wear elongation
To control the elongation due to wear is necessary to establish a registration form.
Since probably will not wear the uniform along the entire length, the measure must be
made for features that are appropriately identified. (Break the chain length in 5 sections)
Should be recognized that the original measure serves as a reference for subsequent
ones and should be kept in mind that all subsequent measurements must be made on the
same traits.
After a few measures you can identify which traits are more subject to the phenomenon
of wear, and then subsequent measurements can be restricted only to these traits.
The measurement can be made or slide gauge long enough or line graph. The reference
may be either the head of the pins or the profile of the plate.
The maximum elongation is conservatively set at 2%.
Check wear plates Profile
After identifying the length of chain where this phenomenon is more evident, with a
gauge should be recognized the actual height of the plate eyelet and compared with the
initial one.
They set the limit on the maximum acceptable wear (see Fig. 6.13):
Wear on one side [(H - H1) / H] x 100 < 2%
Wear on two side [(H – H2) / H2] x 100 < 3.5%
Fig. 6.213
The high specific pressures between the plate and pulleys can cause plates, as well as
wear, even consummation of the material on the edge of the plate that can lead to
blocked joints. If you encounter locked joints, the chain must be replaced.