AISI 630 Stainless Steel Ball Bearings

AISI 630 stainless is excellent in corrosion resistance and can be hardened by heat treatment. AISI 630 stainless steel bearings can offer longer operation life under various corrosive environments with the excellent corrosion resistance and hardness.
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Features

  1. Corrosion resistance superior to AISI 440C stainless steel bearings.
  2. Can be used for heavy-load and high-rotation applications for which AISI 304 stainless steel ball bearings would be unsuitable.
  3. Available for various types of applications with its heat- and chemical-resistant fluorine grease pre-packed as standard lubricant.
  4. Hybrid type with silicon nitride ceramic balls.
  5. Different properties due to the material used.
        AISI 630 AISI 304 AISI 440C
    Specific Gravity 7.8 7.93 7.8
    Tensile Strength N/mm2 1379 520~600 1900~2000
    Elongation 14 45~60
    Elastic Modulus N/mm2 196000 193000 203000
    Hardness HV 434 170 700
    HRC 44.0 3.0 60.1
    Magnetism Magnetic Non magnetic Magnetic

    Note:The properties listed in the table are typical values.
    These values are not always guaranteed.

Product Specifications

●Standard Specifications

Inner and Outer Rings AISI 630
Balls Ceramic Balls(Silicon nitride Si3N4
Retainer AISI 304
Shield AISI 304
Seal*1 Nitrile rubber
Lubricant*2 Fluorine Grease
Precision Grade JIS0

Products with specifications differing from the above are also available:
*1 Also available with fluorine rubber seals.
*2 Other special grease also available.

●Corrosion Resistancea

Material Condition Corrosion Weight Loss(mm/Year)
Sulfuric Acid Hydrochloric Acid Nitric Acid Acetic Acid Phosphoric Acid
5%
35℃/95℉
1%
80℃/176℉
2%
80℃/176℉
0.5%
35℃/95℉
1%
Boiling
66%
Boiling
33%
Boiling
20%
Boiling
70%
Boiling
AISI 630 Aging Heat Treatment 0.1 <0.1 0.2 <0.1 0.9 0.7 1.5 <0.1 3.0
AISI 304 Solution Heat Treatment <0.1 0.6 2.0 0.2 0.4 0.2 <0.1 <0.1 1.0

*Note that results may differ from the data listed, depending on the environment and conditions under which the bearings are used.

Applicatons

LCD and semiconductor manufacturing equipment, film manufacturing equipment, metal plating equipment, other equipment used in acid or alkaline environment.

Precautions

Due to the properties of AISI 630 stainless steel, bearings made of this material are not suitable for applications used under heavy loads or at high rotation that AISI 440C stainless steel ball bearings can carry.