All Brands
- Basic Parame
- Single row taper roller bearings
- Series
- 3978/3920
- Model
- 3978
- Inner ring
- 3920
- Outer ring
- Size(mm)
- 59.530
- d
- 112.712
- D
- 30.162
- T
- Rated load，N
- 129000
- Dynamic load（1）C1
- 0.40
- coefficient（5）e
- 1.49
- Coefficient（5）Y
- -
- Dynamic load（2）C90
- 22900
- Dynamic load（2）Ca90
- 1.45
- Coefficient（5）K
- 191000
- Static load Ca90
- Bearing
- 30.048
- B
- 23.812
- C
- -4.6
- a(3)
- axis
- 1.5
- Maximum shoulder chamfer radius R（4）
- 68.0
- Shoulder diameterda
- 70.0
- Shoulder diameter db
- Bearing housing
- 3.3
- Maximum shoulder chamfer radiusr（4）
- 106.0
- Shoulder diameter Da
- 99.0
- Shoulder diameter Db
- Cage
- 2.20
- Aa
- 1.10
- Ab
- Coefficient
- 75.2
- G1
- 21.3
- G2
- 0.1092
- Cg
- Weight
- 1.32
- kg
