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Design

High speed series, with smaller rolling element, HS bearings are able to withstand higher rotating speed than the standard design.

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Inner and outer rings
  • Standard bearing steel with content of carbon and chromium was selected and hardended to withstand the intense pressure between rolling element and bearing rings.
  • Carbonitriding on both inner and outer rings is a basic hardening process for many TPI bearings. Through this special heat treament, hardness on the raceway surface is increased; which reduce wear accordingly.
  • Ultra-clean steel is available in some of TPI's product series now, higher wear-resistance is obtained accordingly. Since contact fatigue is often caused by hard non-metallic inclusions, bearings nowadays require exceptional levels of cleanliness.
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Rolling element
  • High precision steel balls ensure TPI's angular contact ball bearings have the best precision and stability. This also reflects in bearing performance under high speed rotation.
  • Ceramic balls is an additional option, when it comes to severe operating conditions. Extreme high speed rotation, heavy-duty applications and high heat generation while operating are some stiuations that ceramic balls can definitely help.
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Cage

With the highly engineered arrangement of cages, remarkable characteristics were achieved.

  • T1 cage, desinged for the requirement of high RPM and stable temperature rise.
  • T2 cage, desinged for low noise level, however, the temperature rise in high RPM is relatively high.
  • T3 cage, improvement of T2 cage, it's not only applicable to high RPM operation but also remain low noise level under low RPM.
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Non-contact seal
Seal

Non-contact seal, provide a general protection for the bearings. It cannot prevent liquid contamination from getting into the bearings. Torque and limiting speeds are same as the open type.

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Grease

TPI cooperates with the best grease manufacturers in the world which allows us to suggest and apply the best lubricating selection for our customer.

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Life

Bearing life is usually expressed as the number of hours an individual bearing will operate before material fatigue develops on either the raceways or the rolling element. The usual life rating for industrial applications is called “L10” life. The L10 life is the number of hours which that 90% of bearings will survive; or, conversely, 10% of bearings will have failed in the L10 number of service hours.

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Preload / Rigidity

System rigidity, one of the main factors of productivity and accuracy when it comes to machine tools and other precision applications. By preloading the bearings, it becomes extremely rigid and the magnitude of elastic deformation becomes neglectable.

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Arrangement

Angular contact ball bearings in duplex arrangements vary in combintations of two, three or four, in accordance to user's required specifications.
Back-to-back duplex (DB) arrangement and face-to-face duplex (DF) arrangement can both sustain radial and axial loads in both directions. The wider distance between the effective load centers of the DB arrangement allows larger moment loads to be handled.

Designation

The designation indicates the form, size, precision, internal structure, etc. of the bearing, and it's shown as below:

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Ball material 5S1-  Si3N4 (Ceramic ball)
Blank SUJ2 (Steel ball)
Bearing type 7 Single-row angular contact ball bearing
HS  High speed angular contact ball bearing
BT  High speed angular contact thrust ball bearing
Diameter symbol 9
0
2
3
Bore number 6 - 26 below number 03
00: 10mm
01: 12mm
02: 15mm
03: 17mm
above number 04
bore number x5 mm
Contact angle 15°
CE1  18°
AD  25°
30°
40°
Blank 60°
Cage symbol T1  Phenolic machined cage
T2  Engineering plastic molded cage
T3  Engineering plastic molded cage
Bearing arrangement DB  Back to back arrangement
DF  Face to face arrangement
DT  Tandem arrangement
DBT  Tandem and back to back (triple-row)
DTBT  Tandem and back to back (quad-row)
Flush grinding Flush ground type
Blank Without flush ground
Preload GL  Light preload
GN  Normal preload
GM  Medium preload
GH  Heavy preload
GXX  Special preload
Accuracy P5  JIS standard class 5
P4  JIS standard class 4
P4X  JIS standard class 4, Special bore and outside diameter tolerance
P42  JIS standard class 4 (dimensional)、 JIS standard class 2 (running accuracy)
P2  JIS standard class 2
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