Link-Belt Centrik-Lok CL/Rex 6000 Series Shurlok: Shaft grip when the going gets tough

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Article Tags:
6000-Series
bearings
Centrik-Lok
Link-Belt
Shurlok
Whether it’s a log handler, log deck, de-barker, gang saw, edger, chipper, vibratory screen, or stump grinder, bearing shaft grip is critical to avoiding downtime and equipment damage. Shaft grip reliability boils down to three factors: shaft condition, shaft size and the shaft mounting device.
 
Shaft condition does not have to be perfect (a gouge here and there isn’t a problem), but the shaft should be clean and smooth, meaning no raised material. 
 
Shaft size is critical, especially in applications that involve high speeds (gang saw, edger, planer), high vibration (vibratory screen, stump grinder, chipper), or high load or shock (log handler, log deck, de-barker).  In a perfect world, shaft sizes would be nominal to -.0005 to maximize performance capability for all shaft mounting styles. Unfortunately, doing so can be costly.
 
That said, not all shaft mounting styles are created equal. Let’s compare the most common styles: set screw or set collar, eccentric collar, clamp locking and tapered adapter. 
 
Set screw, set collar and eccentric collar styles are effective for applications that see consistently low to moderate load with little or no vibration.  Clamp locking styles, such as the Link-Belt Centrik-Lok CL for mounted ball bearings and the Rex 6000 Series Shurlok tapered adapter for spherical roller bearings, provide the ultimate in shaft gripping capability. 
 
What’s great about both these styles is they accommodate commercial shafting tolerances which can run as much as .006 undersize based on diameter.  Commercial shafting is much less expensive than turned, ground and polished.
 
In addition, both styles provide maximum performance by yielding a shaft mount with no shaft damage, almost no vibration, maximum grip force and the best running accuracy.
 
Above all, theses styles provide industry-leading shaft grip power. The Link-Belt Centrik-Lok CL utilizes an eight-slit inner ring, two-piece collar, and two hefty socket head cap screws to clamp the bearing to the shaft. This results in an average 20% more grip force than other ball bearing clamp locking devices, and it’s easy to install and remove.
 
The Rex 6000 Series Shurlok tapered adapter utilizes a large-threaded nut which attached to a mating thread on the inner ring along with the tapered adapter sleeve.  This lock-nut-to-inner-ring connection not only provides easy installation, but more importantly, it provides for easy removal from the shaft.  And it’s long-tapered adapter sleeve provides extremely high grip force.
 
The 6000 Series, with all its components, provides one of the most forgiving mounting styles available, along with unmatched performance, ease of installation and removal and maximum uptime. All these factors contribute to lower operating costs.  So, for those tough applications (gang saw, edger, planer, vibratory screen, stump grinder, chipper, log handler, log deck, de-barker) you’ll maximize your uptime by using premium shaft locking devices like the Link-Belt Centrik-Lok CL or the Rex 6000 Series Shurlok.

Mark Czubak

Mark Czubak is a Principal Engineer with the Rexnord Bearing business. He has spent nearly 40 years with Rexnord where he has managed all facets of engineering, including application, design and manufacturing, giving him a cradle to grave knowledge of mounted roller bearings. With this experience, Mark shares his passion and knowledge through bearing training, application assistance and installation. “Bearings are overlooked for the more expensive components of the system, but a bearing failure can cause just as much downtime as any other component so choose your bearings wisely, and save time and money.”