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Bearing is a sophisticated mechanical support components, TIMKEN bearings bearing the user earnestly hope that mounted on a host to scheduled use period are not damaged and to maintain its dynamic performance, but is sometimes not objective facts of expectations, sudden bearing failure accident would cause significant loss to the user. Bearing failure analysis through a large number of studies have shown that short-lived or premature loss of precision of the bearing, either due to material defects or improper manufacturing, but was due in considerable measure did not strictly follow the bearing requirements, maintenance, or is inappropriate or actual load over thin-walled bearing selection load rating of the bearing itself caused non-normal bearing damage.
Cracking spalling occurs due to the bearing TIMKEN bearing under cycle load, contact fatigue damage of surface can occur very easily, so in order to improve the bearing service life, must have a high level of contact fatigue strength of bearing steel.
Hardness is one of the important quality of bearing quality, on the contact fatigue strength, abrasion resistance, has had a direct impact in the elastic limit. Hardness of thin-walled bearing steel under used to achieve HRC61~65, can the contact fatigue of bearing high strength and abrasion resistance properties.
A． Insufficient lubrication of bearings:
Lubrication inadequate or improper lubricants may leads to component abrasion or TIMKEN bearing deformation
Preventive measures: improvement of lubrication system, timed properly to supplement or replace lubricants
B． Irregular operation of bearings:
Bearing cage of installation, operation or demolition may cause deformation or defect
Precaution: with the appropriate operation, installation and removal tools, and using TIMKEN bearings.
C． Bearing rust and corrosion:
Exposure to water may cause the bearing component corrosion and rust. Corroded bearings after injury while at work may cause spalling
Precautions: check seal on a regular basis, to ensure a good seal effect, the correct storage of bearings
D． Bearing currents:
Bearings powered may cause occur when you rotate notch or nicks. TIMKEN bearing at rest, improperly grounded electrical operation will cause a slight burn
Precautions: for parts before welding bearing through appropriate grounding connection to reduce or prevent current through bearing
E． Bearing external materials:
Wear particle contamination and debris penetrated may lead to the TIMKEN bearing face wear, scratches and dents
Preventive measures: clear intrusion into particles and debris, replace the lubricant, check the seal system
F． Eccentric bearing:
Eccentric, inclined or large loads could cause geometric stress concentration, or peeling surface
Precautions: use precise machining of bearing seats and abutments
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NJ2305ET NSK | 25 | 25 | 24 |
| NJ2304ET NSK | 20 | 20 | 21 |