We have added an additional line to the razor marking instructions for the MOUNT on the CXC CLOSSLOC nut, as shown by the red arrow in the picture above.
When the shaft rotates rapidly counterclockwise, CXC CROSSLOC nuts are at increased risk of loosening and pulling the sleeve. For safety, ensure the setscrew is tightened firmly before use. The factory has not tightened it fully to avoid obstructing the shaft during installation.
https://www.brg2k.co.za/turning-the-tide-coc-bearings-enhance-performance-in-the-paper-pulp-sector/
The rusted black oxide nuts were replaced with zinc-nickel plated ones, which are highly resistant to rust.
Although IP69K certification is typically conducted with bearings at rest, the following case demonstrates that waterproofing remains highly effective even during operation. The following report uses part of an internal report from a certain beverage factory dated June 2024.
April 2021: Due to conveyor replacement work associated with the installation of a foreign object inspection machine, the bearings in the affected area were changed to stainless steel bearing units from Company A, considering the impact of water spray, etc.
Company A’s stainless steel square flange unit, inner diameter 40 mm, with cover and NBR rubber plate between the unit and conveyor frame.
July 2021: The conveyor drive shaft stopped due to bearing failure. The failure was thought to be caused by a large amount of water entering the bearings. Although the use of corrosion-resistant stainless steel bearing units from Company A was anticipated, they failed in about four months. Downtime: approximately 200 minutes.
Restored with the same product from Company A.
Estimated Cause: Water from spraying and moisture from the conveyor scattered, and foam or hot water from equipment cleaning reached the bearings, causing moisture to penetrate inside. This likely led to grease degradation and oil film breakdown. The removed bearings were completely locked up.
Discussions with Company A did not yield effective countermeasures.
January 2022: Replaced with COC’s Saniline Series OCSF208.
The bearings from Company A removed at this time were dry, with a gritty feeling when turned by hand.
May 2024: After more than 18 months of use, no failures have occurred. Inspections using a stethoscope during idle operation showed no abnormalities.
Supplementary results from actual tests:
In October 2022, the seals were removed from a COC Saniline Series bearing after approximately 10 months of use for inspection.
The outer slinger was removed, and the grease sealed between the seals remained intact, with no water ingress.
The inner seal was also removed, and no water contamination was found, with a sufficient amount of grease still present inside the bearing.
Evaluation:
Compared to Company A’s stainless steel bearing units, which showed signs of failure or broke down after 4-5 months, the current bearings have lasted almost five times longer. The inspection results after about 10 months of use were also favorable.
With excellent waterproofing, these bearings have proven durable in harsh environments, making them highly effective as a preventive measure against recurrence. The superiority of COC’s bearings has been confirmed, and they are now being gradually applied to other conveyors as well.
Summary of Benefits:
1. Reduced downtime: Assuming continued use of Company A’s bearings, the risk of failure would persist around every four months. After switching to COC bearings, there have been no failures for over two years.
2. Reduced labor hours: Bearing replacement required 3 people x 3 hours. Performing this task three times a year (every 4 months) would have taken 27 hours, which has been saved.
3. Reduced unplanned repair costs: Fewer repairs also lower the risk of work-related injuries.
PROBLEM
One of the leading producers of frac sand was having issues with bearing life on their baghouse, combustion, and nuisance fans due to contamination and installation challenges.
SOLUTION
The customer installed two CX4SAF22-315L COC bearings with innovative CROSSLOC adaptor mount systems, extending bearing life by four times. CROSSLOC provides maximum grip force through 360-degree clamping along the length of the sleeve, which eliminates vibration.
KEY PERFORMANCE FEATURES
• Ease of installation: Each COC bearing comes with a QR code that provides all necessary details for installation and maintenance.
• No need to use feeler gauges to set bearing clearances.
• CROSSLOC mount eliminates set screw shaft scoring.
KEY TAKEAWAYS
In most cases, bearings never meet their intended L10 life due to contamination, misalignment, lubrication or poor installation. COC has taken each of these variables into consideration and addressed them in our innovative design.
CONCLUSION
COC spherical roller bearings utilize innovative technology that combats common pitfalls in bearing instrallation, maintainence and repair. Using advances in design, COC provides a superior alternative for today’s maintenance workforce.
A total of 113,777 visitors attended FOOMA JAPAN over the course of four days this year. We demonstrated high-pressure water washing for Clean-In-Place (CIP).
The newly updated printed catalog of SRB is now available.
All pictures have been updated to feature silver nuts and collars.