7221A
Type

Machine tool spindle bearings

Model:7221A
Thickness(mm):36
Inner diameter d:105
Outer diameter D:190

Detailed information

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Dimensions
  • d105
  • D190
  • B36
  • r Minimum2.1
  • r 1 (Minimum)1.1
Load rating (N)
  • Cr157000
  • Cor142000
Load rating {kgf}
  • Cr16000
  • Cor14400
Limit speed(1)(rpm)
  • Grease lubrication3800
  • Oil lubrication5000
Action point position (mm)
  • a60.6
Installation size (mm)
  • d a (Minimum)117
  • Da (Maximum)178
  • r a (Maximum)2
Bearing code(2)
  • Single column7221A
  • DB7221DB
  • DF7221DF
  • DT7221DT
Rated load (paired double type) (N)
  • Cr254000
  • Cor283000
Rated load (paired double type) {kgf}
  • Cr25900
  • Cor28900
Paired Duplex Limit speed(1) (rpm)
  • Grease lubrication3000
  • Oil lubrication4000
Paired Duplex Action point distance a0(mm)
  • Back-to-back configuration121.2
  • Face-to-face configuration49.2
Paired Duplex Installation size(mm)
  • db(3) (Minimum)112
  • Db (Maximum)183
  • rb(3) (Maximum)1
Coefficientfo
  • Coefficientfo15.0
weight(kg)
  • (Refer to)3.84

List of Similar Bearing Models