The Four Shaft Attachment Methods June 1, 2016 by Webmaster, PTI proudly offers all four insert types for mounted ball bearings: Setscrew Locking, Eccentric Locking Collar, Concentric Clamp Collar and Tapered Adapter Sleeve. Understanding the features of each and the differences between them will help ensure you’re using the best shaft attachment method for your application. SETSCREW LOCKING How it works: Two screws are tightened to clamp the bearing onto the shaft. The contact between the bearing and the shaft is concentrated on the opposite side of the setscrews. This is the most popular mounting method. Note: Setscrews can cause significant fretting corrosion, making removal very difficult after years of operation. ECCENTRIC LOCKING COLLAR How it works: As the collar is twisted into place, it locks the bearing to the shaft. The contact of the bearing is slightly more distributed than the setscrew locking method. Note: These are unidirectional and are not intended for reversing loads. Like the setscrew method, the eccentric locking collar can cause significant fretting corrosion, making removal very difficult after years of operation. CONCENTRIC CLAMP COLLAR How it works: Tangs on the extended inner ring of the bearing lock down when the collar is twisted into place. The contact of the bearing is evenly distributed within a small area around the shaft. Note: This is a good method to use to minimize vibration. TAPERED ADAPTER SLEEVE How it works: This bearing has a tapered adapter, a locking washer, and a locking nut. As the locking nut is tightened with a spanner wrench, the adapter is drawn through the bearing and tightened to the shaft. The contact of the bearing is evenly distributed around the shaft. Note: This bearing has the highest purchase price and will take the longest to install, but allows for minimal shaft damage and highest possible speeds with the least amount of vibration. Click here for a video detailing the installation process and proper bearing maintenance. * * * About PTI: Upon opening in 1994, PTI has specialized in serving the growing niche market of Metric products. As demand has increased over the years, so has our product offering. Today, our customers enjoy a huge offering of both Metric and Inch-based products for the Industrial Power Transmission Industry. Want to learn more about PTI? Click here to view our company overview video. Check out other videos, information and more at www.ptintl.com.