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NSK Europe Ltd.
Bearing Doctor

Bearing Doctor

Product catalog summary

Introduction
NSK, a prominent manufacturer of rolling bearings, highlights the significance of proper handling and maintenance to prevent premature bearing failure. The document identifies causes of failure such as poor lubrication and improper handling, emphasizing regular inspections to prolong bearing life.

Bearing Handling & Maintenance
Precautions for Handling: Bearings should be handled carefully to prevent damage, ensuring a clean environment, using appropriate tools, and protecting against corrosion.
Mounting: Proper mounting is essential for optimal performance, involving cleaning parts, checking dimensions, and ensuring correct lubrication.
Check the Operation: Post-mounting operational tests are crucial to confirm proper installation, with regular inspections to determine lubricant replenishment and replacement intervals.

Bearing Performance Factors
Bearing Noise: Noise detection instruments can identify unusual sounds indicating potential damage.
Bearing Vibration: Vibration analysis helps identify irregularities, using a frequency spectrum analyzer to measure vibration magnitude and frequency.
Bearing Temperature: Monitoring temperature is vital for assessing operating conditions.

Bearing Inspection
Regular inspections during machine maintenance are crucial, including checking raceway conditions to decide on reuse or replacement.

Bearing Damage and Countermeasures
The document details types of bearing damage such as flaking, peeling, scoring, and smearing, along with causes and countermeasures. For instance, flaking is often due to fatigue, while peeling can result from poor lubrication.

Appendix: Bearing Diagnostic Chart
A diagnostic chart is provided to help identify and address specific bearing issues.

Temperature Management
Bearings typically stabilize in temperature 1-2 hours after operation begins, influenced by load, speed, and heat transfer. Rapid temperature increases may indicate insufficient lubrication or improper mounting, requiring immediate action.

Effects of Lubrication
Lubrication reduces friction and wear, extends fatigue life, dissipates heat, and prevents rust. Grease is simpler but less effective at high speeds and temperatures, while oil provides better cooling for high-speed applications.

Lubrication Selection
Grease lubrication involves selecting suitable grease based on conditions, while oil lubrication offers methods like oil bath and circulating oil. Oil viscosity should match operating temperature, with specific recommendations for different bearing types.

Lubricant Replenishment and Replacement
Grease requires periodic replenishment, with intervals adjusted based on temperature and load. Oil replacement intervals depend on operating conditions, with more frequent changes needed at higher temperatures.

Running Traces and Applied Loads
Running traces indicate loading conditions and can diagnose issues like misalignment or unexpected loads, aiding in identifying damage causes.

Conclusion
Proper lubrication and regular maintenance are crucial for bearing longevity, with guidelines provided for selecting and maintaining lubrication, as well as diagnosing and addressing issues.

Types of Bearing Damage
The document provides detailed analysis of damage types, symptoms, causes, and countermeasures, including flaking, peeling, scoring, smearing, fractures, cracks, cage damage, denting, pitting, wear, and fretting.

False Brinelling, Creep, and Seizure
False brinelling involves hollow spots due to vibration, with countermeasures including securing the shaft and reducing vibration. Creep involves slipping at fitting surfaces, with solutions like checking interference and applying adhesive. Seizure results from overheating, with recommendations for improving lubrication and sealing mechanisms.

Electrical Corrosion, Rust, and Mounting Flaws
Electrical corrosion is caused by current passing through bearings, with preventive measures including circuit design and insulation. Rust and corrosion result from water entry, with countermeasures like improved sealing and storage. Mounting flaws involve scratches during mounting, with solutions like using appropriate tools.

Appendix
A diagnostic chart summarizes common bearing damages, their locations, causes, and remarks, providing a quick reference for troubleshooting.

Contact Information
The document concludes with contact details for NSK sales offices across Europe.

Catalog excerpts

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:6.00pt "Microsoft Sans Serif", sans-serif; } .font1 { font:7.00pt "Microsoft Sans Serif", sans-serif; } .font2 { font:11.00pt "Microsoft Sans Serif", sans-serif; } .font3 { font:20.00pt "Microsoft Sans Serif", sans-serif; } Partnership based on trust -and trust based on quality Total Quality by NSK: The synergies of our global network of NSK Technology Centres. Just one example of how we meet our requirements for high quality. NSK is one of the leading companies with a long tradition in patent applications for machine...

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:20.00pt "Microsoft Sans Serif", sans-serif; } New Bearing Doctor

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:6.00pt "Microsoft Sans Serif", sans-serif; } .font1 { font:7.00pt "Microsoft Sans Serif", sans-serif; } .font2 { font:11.00pt "Microsoft Sans Serif", sans-serif; } .font3 { font:20.00pt "Microsoft Sans Serif", sans-serif; } introduction When a rolling bearing is damaged during machine opration, the entire machine or equipment may seize or malfunction. Since bearings that fail prematurely or unexpectedly cause trouble, it is important to be able to identify and predict failure beforehand, if possible, so that preventive...

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DRILL SERIES [Europe].indd table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:6.00pt "Arial", sans-serif; } .font1 { font:7.00pt "Arial", sans-serif; } .font2 { font:10.00pt "Arial", sans-serif; } .font3 { font:19.00pt "Arial", sans-serif; } Bearing Handling & Maintenance A Prcautions for Handling Since rolling bearings are high prcision machine parts, they must be handled carefully. Even if high quality bearings are used, their expected life and performance cannot be attained if they are used improperly. The main precautions to be observed are as follows: (1) Keep...

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DRILL SERIES [Europe].indd table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:6.00pt "Arial", sans-serif; } .font1 { font:7.00pt "Arial", sans-serif; } .font2 { font:19.00pt "Arial", sans-serif; } Bearing Handling & Maintenance Mounting It is advisable to study the bearing mounting thoroughly since the quality of the bearing mounting influences the bearing's running accuracy, life and performance. It is recommended that the mounting method includes the following steps. > Clean the bearing and surrounding parts. > Check the dimensions and finish conditions of related...

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eurolaser - Lasermaschinen f. die Bearbeitung von Folien und Folientastaturen table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:6.00pt "Arial", sans-serif; } .font1 { font:7.00pt "Arial", sans-serif; } .font2 { font:10.00pt "Arial", sans-serif; } A Table 1 Methods to check opration Machine size Operating procdure Bearing condition checks Small machine Manual operation. Turn the bearing by hand. If no problems are detected, then proceed to operate the machine. > Stick-slip (Debris, cracks, dents) > Uneven rotating torque (Faulty mounting) > Excessive torque (Error...

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eurolaser - Lasermaschinen f. die Bearbeitung von Folien und Folientastaturen table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:7.00pt "Arial", sans-serif; } .font1 { font:11.00pt "Arial", sans-serif; } .font2 { font:19.00pt "Arial", sans-serif; } Bearing Performance Factors Key bearing performance factors during opration are bearing noise, vibration, temprature, and lubricant state. Please refer to Table 2 if any operation irregularities are detected. Bearing Noise During operation, sound d驩tection instruments (stthoscope, NSK Bearing Monitor, etc.) can be used to...

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eurolaser - Lasermaschinen f. die Bearbeitung von Folien und Folientastaturen table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:4.00pt "Arial", sans-serif; } .font1 { font:5.00pt "Arial", sans-serif; } .font2 { font:6.00pt "Arial", sans-serif; } .font3 { font:7.00pt "Arial", sans-serif; } .font4 { font:19.00pt "Arial", sans-serif; } A Table 3 Comparison between grease and oil lubrication Selection of Lubrication Bearing lubrication methods are divided into two main categories: grease lubrication and oil lubrication. A lubrication method is adopted that matches the...

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eurolaser - Lasermaschinen f. die Bearbeitung von Folien und Folientastaturen table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:6.00pt "Arial", sans-serif; } .font1 { font:7.00pt "Arial", sans-serif; } .font2 { font:19.00pt "Arial", sans-serif; } Bearing Performance Factors Replenishment and Replacement of Lubricant (1) Replenishing Interval Even if high-quality grease is used, there is dtrioration of its properties with time; therefore, periodic replenishment is required. Figs. 2 (1) and (2) show the replenishment time intervals for various bearing types running...

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Bearing Doctor

Bearing Doctor

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