Industrial Bearings at Distributors Cost- Limited Supply
Craft Split Bearings for industrial applications
Craft Split Bearings, Cooper Interchange, Split Pillowblock, Cylindrical,
Pillowblock & Split roller Bearings At Discount Prices
The Craft Split Bearing Advantage -- Ease of Replacement.
Click Here for Craft Split Bearings Specifications & Information Chart
Industrial Drives & Electric now has a limited supply being offered at Distributorís Cost
In a heavy industry environment, all bearings eventually fail. It's simply a fact of life given the incredible stresses, punishing usage and operating conditions to which these integral components are subjected. This unfortunate fact is what makes the Craft Split Bearing such an important innovation. True, it's built to last longer than other bearings, split or not. But its greatest benefit comes not just with the ease and flexibility of initial installation, monitoring and maintenance on the bearing, but if there is a failure, the ease of replacement.
The bearing is split down to the shaft so that all components, even the seals, can be easily and quickly replaced. With the split design, replacing a bearing becomes a minor maintenance job as opposed to a major, potentially catastrophic event. That's because it eliminates the need to remove shafts and drive components installed on the shaft, confining the scope of the repair to the bearing itself. Furthermore, in most cases, only the internal bearing components need to be replaced, and this can easily be done without even removing the pedestal.
While the benefits of a split bearing are dramatic, building and designing a reliable one was no easy task. Craft Bearing Company has become an industry leader in bearing design. In fact, Craft has been awarded patents on many innovative features.
Bearing Load Ratings and Life
All calculations to determine the load carrying capacities of the Craft Bearing are based on and in accordance with American Bearing Manufacturers Association (ABMA) and International Organization for Standardization (ISO) standards.
Basic Rating Life
L10, or Basic Rating Life, is defined by the ISO formula, L10 = (CR/PR)p, where:
L10 = Basic Rating Life, in millions of revolutions
CR = Basic Dynamic Load Rating
PR = Dynamic Equivalent Radial Load
P = Exponent of the Life Equation 10/3
L10 is the minimum expected life for 90% of a group of like bearings. Median life, which 50% of the group will complete or exceed, is approximately five times the rating life.
Grease of a #2 consistency with an EP (extreme pressure) additive is the preferred lubricant in most normal applications. All Craft Cartridges have a grease fitting, allowing the lubricant direct access to the rolling surfaces of the bearing. Depending on the application, excessive grease will result in an abnormal rise in bearing temperature. Therefore, Craft Cartridges are also supplied with purging capabilities. This is done by removing the purge plug, located in the lower half of the cartridge, and allowing the grease to seek its own level. Once this is accomplished, the plug is then replaced.
Confirm proper bearing selection has been made. Check shaft journal for roundness and size (as a general guide, +.000" to -.005" on diameter is acceptable). Ensure that the bearing and surrounding work areas are free of dirt and other contaminants.
Assembly (Disassembly is reverse of the following)
1. Dismantle pillow block and clean bearing parts with a government-approved solvent. It is not necessary to remove outer race from cartridge.
2. Apply grease between the o-ring centers before assembling the Triple Labyrinth (TL) seals and move to the outer perimeter of the bearing journal.
3. Position inner race in proper location observing matching marks.
4. Fit the clamping collars at approximately 45 degrees from the inner race joints, insuring that there is an equal gap at inner race joints. Tap down clamping collars with a mallet and tighten the high tensile screws equally, repeating until collars are properly seated.
5. Coat the inner race and roller cage assembly with liberal amounts of grease. Install roller cage assembly, making sure that the cage clips are securely in place.
6. Position seals so that they are in alignment with the grooves of the cartridge. Apply grease to the two grooves that form the outside diameter of the seals. This serves two functions:
To lubricate the running surfaces of the seals and cartridge.
To seal bearing and stop contaminates from working their way through the labyrinth and entering the bearing.
7. At this time, coat the running surface of the outer race with grease. Check cartridge match marks carefully, then assemble cartridge.
8. After cartridge halves are assembled, coat the spherical outside diameter of the cartridge and the bore of the housing with a graphite compound. Introduce the required amount of lubricant into the cartridge assembly.
9. Place the housing base into position, insuring that the bottom of the base is level and supported 100%. Install the housing cap. Rotate the shaft to align the cartridge assembly within the housing. Tighten the housing cap screws.
Note: Before shafting is jacked up, all housing cap bolts should be backed off.
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For more information, contact Industrial Drives & Electric, Inc. at 706-213-6300