Product Description
fill high-volume and low-volume orders.Section 5 Specialty Products & ServicesSlewing Ring Bearings Catalog 390 Corporation Issue11Remanufacturing Program's bearing repair program is designed to provide thebest service options available - no matter the brand or sizeof bearing. Bearings are assessed for remanufacture from 10inches to 240 inches in outside diameter (OD).In this program optimized solutions are provided throughour experienced sales team, international presence, andprocess capability. The process begins with the serviceengineering team partnering with the customer'smaintenance or service groups to analyze the bearing.
Bearing Failure Warning Signs
Perhaps the most difficult task is determining if and when abearing needs to be serviced. This determination requiresmuch more than a quick visual inspection. Below are a fewsigns to look for when inspecting bearings that may needto be repaired:
The bearing is nearing its suggested life expectancy.
The bearing has exceeded an operating temperature of 200° F (93° C).
The bearing has been exposed to excessive vibration.
The bearing experienced a sudden drop or gain in
lubrication.
The bearing has a missing or torn seal.
The bearing exhibits excessive rotational resistance.
The structure has excessive movement or rocking
during operation.
The mating structure and hardware is damaged, e.g.
cracked, broken, distorted, or even missing.
The bearing exhibits limited rotation, uncharacteristic
vibrations, or noise.
Visible damage to gear or bearing
Paying attention to these details during regularmaintenance checks can help you determine whether abearing needs maintenance before it causes unnecessarydowntime and expense. Careful observation is the first stepin creating a program that monitors your bearings andsurroundingoperations.
WARNING:
Proper maintenance and handlingpractices are critical. Failure to followinstallation, maintenance, and operating instructionscan result in equipment failure, creating a risk of bodilyinjury or death.To provide the correct repair solution to the damagedbearing, the cause and extent of the damage must beunderstood. Environmental issues, such as ingress ofcontamination and water into the bearing, are the commoncauses of premature bearing failure. Following are typicalcauses of damage found on bearings and precautions thatcan be taken to prolong life.
Improper Handling:
Cage deformation and nicks or gouges can result fromimproper installation, handling or removal.
Precautions:
Use proper handling practices along withthe correct handling, mounting and disassembly tools.
Inadequate Lubrication:
Scoring of components or severe bearing deformationcan result from inadequate or incorrect lubrication.
Precautions: Inspect and replace the lubricant at the
manufacturer's recommended interval or as needed,whichever occurs first. If necessary, change or improve
lubricant.
Corrosion and Etching:
Exposure to moisture can lead to etching, pitting,
then rusting of bearing components. Spalling mayresult from bearings that operate after such damage.
Precautions: Check seals regularly, ensure propersealing and store bearings properly.
Electric Current:
Passage of electric current while a bearing is rotatingmay cause fluting or grooving. Improper electricrounding while a bearing is stationary can create smallburns.
Precautions: Shunt the current around the bearing withthe proper earth connection before welding.
Section 5 Specialty Products & Services
Corporation Issue 11 Slewing Ring Bearings Catalog 390Remanufacturing Program
Foreign Material:
Abrasions, bruising and grooving can result from
abrasive particle contamination and debris.
Precautions: Remove the debris, change the lubricant,
and check/replace the seals.
Misalignment:
Geometric stress concentration and spalling can resultfrom misalignment, deflections or heavy loading.
Precautions: Machine the bearing seats and shouldersaccurately. Check accuracy of shaft and housing seats,
ensure proper shaft/housing alignment and confirm orreduce operating forces.
Overloading:
Improper use for the intended application can lead tooverload conditions accelerating wear.
Precautions: Utilize the equipment for the intendedapplication within the load limits definedService Options
The initial analysis covers the cleaning, verification ofinternal clearances, disassembly, and inspection of thebearing assembly. The engineering team then assesses thedamage and provides a quotation based on the mostappropriate remanufacturing type to restore the bearing toull operation. The three repair classifications are:
Class A Repair
To ensure correct geometry and alignment, bearingassemblies require machining of rolling element pathwaysand the surfaces that interface with the mounting structurefor correct installation. Oversize rolling elements are usedto restore the desired internal clearance or preload and newspacers and seals are fitted.
Audited Supplier 
){kind=link}