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  4. AISI 304 Stainless Steel Ball Bearings

Features

  • Higher corrosion resistance than AISI 440C stainless steel ball bearings
  • Non-magnetic*1
  • Difference in properties by the material used
AISI 304 AISI 440C SAE 52100
　Specic Gravity － 7.937.87.8
　Tensile Strength N/mm2 520 ～ 600 1900 ～ 2000 1680
　Elongation ％ 45 ～ 60－ －
　Elastic Modulus N/mm2193000203000212000
　Hardness HV170700740
HRC 3.060.161.8
　Magnetism－ Non magnetic*1 Magnetic Magnetic

Note: The properties listed in the table are typical values.
*1 AISI 304 stainless steel may be magnetized depending on the processing method used.

Specification

Inner and Outer RingsAISI 304
Ball*1AISI 304
RetainerAISI 304
ShieldAISI 304
Seal*2Nitrile rubber (NBR）
Lubricant*3Heat resistant grease
Precision GradeSee ”Dimensions”

Special bearings are also available in quick delivery with the specications below:

*1 Ceramic balls (Silicon nitride Si3N4)
*2 Fluorine rubber seal
*3 Heat- and chemical-resistant uorine grease and other special greases

Applications

LCD and semiconductor manufacturing equipment, metal plating equipment, other equipment used in environments where the bearings come into contact with acid or alkaline chemicals.

Precautions

AISI 304 stainless steel is not appropriate for use under heavy load or at medium to high rotation where AISI 440C stainless steel is usable, because it can not be hardened by heat treatment.

AISI 304 Stainless Steel Ball Bearing
Basic Part No. d D B r
(min)		 Allowable Radial Load Allowable Rotation
Boundary Dimension Tole-
rance 		Boundary Dimension Tole-
rance 		Boundary Dimension Tole-
rance
mm mm mm mm N rpm
6S 696B6+0.050
0		150-0.02550-0.120 0.2602300
6S 626B*61960.31302100
6S 698B*8190-0.03060.31132100
6S 608B*82270.31652000
6S 628B82480.31682000
6S 6800B101950.31052200
6S 6900B102260.31352000
6S 6000B102680.32301800
6S 6200B103090.62551600
6S 6300B10350-0.035110.64051400
6S 6801B12210-0.03050.3951900
6S 6901B122880.31451800
6S 6001B122880.32551600
6S 6201B12320-0.035100.63401500
6S 6802B15240-0.03050.31051600
6S 6902B122880.32151500
6S 6002B15320-0.03590.32801400
6S 6202B1535110.63831300
6S 6903B17300-0.03070.32301300
6S 6003B17350-0.035100.33001200
6S 6203B1740120.64781100
6S 6804B203270.32001200
6S 6904B122880.33201100
6S 6004B2042120.64701000
6S 6204B2047141.0643930
6S 6805B253770.32151000
6S 6905B254290.3350940
6S 6005B2547120.6503890
6S 6205B25520-0.040151.0700820
6S 6006B3055131.0663750
6S 6206B3062161.0975690
6S 6007B3562141.0800650
6S 6207B3572171.11288590
6S 6008B4068151.0838590
6S 6208B4080181.11450530

Note: Allowable radial load and rotations are provided for reference only.
* OPEN & ZZ types only.

Corrosion Resistance

Chemicals Condition Temperature AISI 304 Stainless Steel Ball Bearings
Chlorinedry≦30ºC/86ºF○
wet×
Methylene Chloridedry○
wet○
Ammonium Chloride50% solution△
Sodium Chloridesaturation100ºC/212ºF○
Lithium Chloridesaturationboiling point○
Sulfuric Acidsolution up to 50%60ºC/140ºF○
95% to 100% solution149ºC/301ºF○
Sulfurous Acid Gasdry×
wet○
Nitric Acid0.5% to 40% solutionboiling point○
40% to 95% solution70ºC/158ºF○
Acetic Acidsolution up to 100%boiling point○
Citric Acidsolution up to 100%≦30ºC/86ºF○
solution up to 15%65ºC/149ºF△
Phosphoric Acid≦65%≦30ºC/86ºF○
Ethanol （Ethyl Alcohol）≦30ºC/86ºF○
Cresol （Cresylic Acid）dry○
Chlorine Gasdry≦30ºC/86ºF○
Seawater△
Caustic Soda10% solution○
Ammonium Sulfate50.4% solution120ºC/248ºF○
Carbon Tetrachloridedry△

* ○not effected 　　△slightly effected　×effected


Note: This comparison list is provided as general guidance for the users. The performance level of corrosion resistance varies, depending upon the conditions of each application.
※ The performance values on this catalog are not guaranteed and the specifications may change without prior notice for improved performance.