Chain drives don’t last forever. If you work with linear motion and power transmission products of any sort, you should watch for weak chains that cling to the sprocket, pull too easily from it, have far too much give, or are simply too slack to be secure.  Before you’ve replaced them, you need to remember to change the sprocket, too—here’s why.

Why You Need to Change the Sprockets

Since the chain drive and sprockets work in tandem with one another, they both must be in the best possible condition. The two components mate up perfectly with each other and are often used in applications involving heavy machinery which can cause premature failure quickly. When these two components are in spec, they will run efficiently, and should be trouble free, assuming they’re lubricated and have proper tension.

When it does come time to replace the chain drive, don’t risk the integrity of the replacement chain by neglecting to swap out the old sprocket at the same time. That’s because the sprocket teeth are likely to be worn at this stage. They can be identified by sharp edges, deep shiny pockets, or heavier wear on one side of the tooth pocket. Replacing both at once is a simple and effective way to avoid unexpected damage or downtime.  A new chain installed on worn sprockets can lose as much as half its service life.

How to Increase the Longevity of Both

One key to maximizing a chain drive is to minimize its exposure to moisture and dirt. Both can compromise the chain’s integrity, causing issues like buildup and blockages that contribute to premature sprocket wear. To protect it and to reduce the likelihood of quicker wear, apply an appropriate lubricating product that’s free of additives to the pin and bushing area of the chain. Next, make certain your chain is tensioned properly.  Chain should not be “piano wire” tight.  Generally, a ¼ -½ slack in most drives is sufficient. Too much or too little tension can make the sprockets wear faster also.  Make sure that you select the right chain size, too; if it’s too small, it may not handle load transfers efficiently and will result in faster deterioration, if its too large, you can have unnecessary repair costs.  For load rating and drive design information consult your Senqcia Maxco, Ltd. catalog or website. www.senqciamaxco.com 

It’s a little more challenging to determine the severity of a worn sprocket. Usually, it becomes most evident when there’s a breakdown. You can extend the life span of the sprockets, however, by checking periodically to assure there is no misalignment present (grooving on one side of tooth) and no binding of the chain in the drive. Visible wear is a clear sign that it’s time for an immediate replacement; it is important that you also change the chain when you notice this to prevent premature breakdown.

For quality replacement  of roller chain drives and sprockets, professionals turn to Industrial Components Sales of Hudson, WI, with offices in Bemidji, MN; Delavan, WI; You’ll find efficient products from Van Zeeland Manufacturing®, a leading industry brand. Offering over 60 years of experience in industrial sales, these professionals will work closely with you to ensure that you find the right solution for your needs. Visit the website to find out more about their range, or call (651) 270-0151 to speak with a representative.