Correntes de rolos: quais são os indicadores de desgaste?

Roller chains: what are the wear indicators?

roller chains signs of wear

Roller chains, as a method of transmitting mechanical energy, and like any mechanical system, are subject to wear over time and with continuous use. Wear depends on several factors, including whether the chain is properly lubricated and the amount of load, among other things.

So how do you know if a roller chain is showing significant wear and what is excessive wear? The best indicator of wear is chain stretch, which actually indicates how much wear has occurred on the chain pins and rollers.

Roller chains eventually wear out enough to require replacement. A typical benchmark for this is 1.5 to 2% (12,180 in/ft to 12,240 in/ft) stretch. Chains can operate until they reach 3% elongation, but at that point they are at greater risk of suboptimal performance. For example, as chains wear over time, the pitch increases, making them more flexible and flexible, which can add instability in the form of slack in the system.

The chain wear indicator tells users whether the chain is ok (not stretched), if it is partially stretched but still usable (0.7%), or if the chain needs to be replaced (1.5%).

A simple and effective way to measure chain wear is to use a chain wear indicator.

Basically, it is a type of tool that measures chain wear depending on the gap between two rollers. The way to use it is to insert the tool (the chain wear indicator or gauge) into the space between two rollers. But first you will need to know the ANSI size of the string you are using to get a correct reading.

If the tool stops at ANSI size and does not slip, the chain can still be used. If, however, the tool goes past this point and goes to the next larger size, this is a sign that the roller chain has stretched beyond its normal level and needs to be replaced.

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