B7208AC2RZHQ1P4GB Spindle Bearing

B7208AC2RZHQ1P4GB Spindle Bearing

B7208AC2RZHQ1P4GB Spindle Bearing
  • B7208AC2RZHQ1P4GB Spindle Bearing
  • Bearing:B7208AC2RZHQ1P4GB
  • ID:40mm
  • OD:80mm
  • B:18mm
  • Inner/Outer Ring Material:SUJ2 Equiv.
  • Contact Angle:25°
  • Ball:Si3N4 Ceramic ball
  • Speed Oil:27000
  • Cage:Bakelite/nylon
  • r:1.1
  • Weight:0.35KG
  • Application:Spindle
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Part   NumberB7208AC2RZHQ1P4GB
For Load   DirectionCombined Radial   and Thrust
Single Row/Double RowSingle
Seal TypeSealed
Precision RatingP4   (ABEC-7) P5 (ABEC-5)
Contact Angle25
DuplexDB   (back-to-back arrangement)
DF (face-to-face arrangement)
DT (tandem arrangement)
Bore Dia (d)40 mm
Bore Dia Tolerance-0.006mm   to 0
Outer Dia (D)80 mm
Outer Dia Tolerance-0.007mm   to 0
Width (B)18 mm
Width Tolerance-0.12mm   to 0
Ring MaterialSUJ2
Ball MaterialCeraimc Ball Si3N4
Cage MaterialTYN   (ball guided polyamide resin cage)

TR   (outer ring guided polyamide resin cage)
Dynamic Load Rating (Cr) (KN)21.6
Static Load Rating (Cor) (KN)15.9
Axial Load (KN)10.6
Max Speed (Grease) (RPM)21300
Max Speed (Oil) (RPM) 32500
PreloadEL   (extra light preload)

L   (light preload)

M   (medium preload)

H   (heavy preload)

CP   (special preload)

CA   (special axial clearance)
Shaft Mount TypePress   Fit
Temperature Range-40   to 120 ºC
Weight (grams)0.35KG

spindle bearings

spindle bearings

spindle bearings

Spindle ball bearings are single-row angular contact ball bearings with a contact angle of 15° or 25° that can support load on one side. In respect of their design, their running accuracy and the materials used, they are optimised for highest speed and great bearing capacity.

Open spindle ball bearings

Standard version with large balls for optimum utilization of the bearing interior and solid retainer for high bearing capacity.

The outer ring has one shoulder only. The increased height of the snap feature prevents bearing collapse.

Solid retainer guided on outer ring with low cross-section, particularly well suited for oil injection lubrication.

Closed spindle ball bearings

The non-contact shields do not cause any additional friction torque

The standard shields made of Viton with metal stiffener offer excellent temperature and media resistance

Very narrow sealing gap for high dust protection

Recommended for grease lubrication, increases the longer service life

Same outer dimensions as open spindle bearings

This design requires often smaller balls, resulting in a lower bearing capacity but higher axial stiffness and speed limit (usually signified by an index letter after the basic type in the part number).

Also available without closure as high-speed version