tainetsu

PDF Catalog Download↓

Heat-resistant Stainless Bearings

Heat-resistant bearing, made of AISI 440C stainless steel with heat-resistant fluorine grease.

Features

  1. Operating temperature is up to 482°F, except sealed type.
  2. AISI 440C stainless steel has lower hardness decrease ratio and smaller dimension changes than SAE 52100 bearing steel in high temperature environment.
  3. AISI 440C stainless steel is superior to SAE 52100 bearing steel in oxidation resistance in high temperature environment.
  4. Filling heat-resistant fluorine grease enables lubrication in high temperature environment.

Product Specications

Standard Specifications
Inner and Outer Rings AISI 440C
Balls AISI 440C
Retainer AISI 304
Shield AISI 304
Seal Fluorine rubber*1
Lubricant Heat-resistant fluorine grease
Radial clearance*2 C4

*1 Sealed type available up to 392°F
   Below special specifications are available besides standard specifications.
*2 Special clearance, such as C3 or C5.

Performance

Durability in high temperature environment

tainetsu-zu1-en
*The above performance values are our test results and are not guaranteed values.

Application

Device around furnace, oven, heater, drying equipment, vacuum apparatus and other high temperature area.

Heat-resistant Hybrid Bearings

Longer lifetime, by incorporating ceramic ball,than Heat-resistant Stainless Bearings

Features

  1. Operating temperature is up to 482°F, except sealed type
  2. Hybrid type incorporating ceramic balls into outer and inner rings of AISI 440C stainless steel
  3. Longer grease life, by lower heat generation with ceramic balls
  4. Less running cost by longer lifetime
  5. Items Unit Silicon nitride
    Si3N4
    Stainless steel
    AISI 440C
    Bearing steel
    SAE 52100
    Superiority of ceramic ball
    Density g/cm3 3.2 7.8 7.8 Lowering centrifugal force of balls
    Heat expansion coefficient X10-6/℃ 3.2 10.5 12.5 Small variation of internal clearance by temperature rise
    Hardness HV 1400 700 740 High rigidity against deformation
    Young’s modulus GPa 320 200 210 Reducing friction by high rigidity
    Heat resistance °F 1472 752 356 Maintaining rigidity capacity in high temperature
    Conductivity No Yes Yes Preventing electric corrosion

Product Specications

Standard Specifications
Inner and Outer Rings AISI 440C
Balls Silicon nitride(Si3N4
Retainer AISI 304
Shield AISI 304
Seal Fluorine rubber*1
Lubricant Heat-resistant fluorine grease
Radial clearance C4

*1 Sealed type available up to 392°F

Performance

Durability in high temperature environment

tainetsu-zu2-en
* The above performance values are our test results and are not guaranteed values.

Precautions

Under high temperature environment, radial internal clearance decreases due to difference of materials used for shaft, i.e. linear expansion coefficient, which may interfere with the rotation of the bearing. Please consider the thermal expansion sufficiently and select fitting and material of the shaft. Please contact us for further information.