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Unit of Measure

Key Dimensions

Engineering Group

 N/A Mounted Bearing

Bearing Number

 N/A 22220

Shaft Size

 N/A 3 11/16 in

Shaft Size Type

 N/A Imperial

Full Timken Part Number

 N/A QAPR20A311SB QAPR20A311SC QAPR20A311SEB QAPR20A311SEC QAPR20A311SEM QAPR20A311SEN QAPR20A311SEO QAPR20A311SET QAPR20A311SM QAPR20A311SN QAPR20A311SO QAPR20A311ST

Locking Style

 N/A Single Concentric

Housing Construction

 N/A Four-Bolt Pillow Block

Other Dimensions

Dimension A

 N/A 4.25 in108 mm

Dimension B

 N/A 8.78 in223 mm

Dimension C

 N/A 6 in152.4 mm

Dimension D Min

 N/A 10.88 in276.4 mm

Dimension D Max

 N/A 13.38 in339.9 mm

Dimension E

 N/A 2.25 in57.2 mm

Dimension F

 N/A 14.88 in378 mm

Dimension G

 N/A 4.31 in109.5 mm

Dimension H

 N/A 1.4 in35.6 mm

Dimension J (Bolt Size)

 N/A 0.75 in20 mm

Dimension KA

 N/A 1.63 in41.4 mm

Dimension L

 N/A 5.13 in130.3 mm

Dimension M

 N/A 2.97 in75.4 mm

Dimension RA

 N/A 0.36 in9.1 mm

Dimension SA

 N/A 4.59 in116.7 mm

Radial and Thrust Factors

C0 - Static Load

 N/A 113000 lbf502000 N

C - Dynamic Load (Basic)

 N/A 97700 lbf435000 N

e - Geometry Factor

 N/A 0.24

Y1 - Geometry Factor

 N/A 2.85

Y2 - Geometry Factor

 N/A 4.24

Engineering Seal Speed

Oil Lubrication - M/N Seal

 N/A 1200 rpm

Oil Lubrication - T Seal

 N/A 2000 rpm

Oil Lubrication - B/C/O Seal

 N/A 900 rpm

Grease Lubrication - M/N Seal

 N/A 1200 rpm

Grease Lubrication - T Seal

 N/A 1600 rpm

Grease Lubrication - B/C/O Seal

 N/A 900 rpm

Engineering Bearing Attributes

Float

 N/A 0.083 in2.108 mm

Shaft Tolerance

 N/A 0.0030 in0.076 mm

Engineering Internal Radial Clearance

Eng Internal Radial Clearance - Min

 N/A 0.0030

Eng Internal Radial Clearance - Max

 N/A 0.0047

Pre Install Clearance Min

 N/A 0.0030 in0.075 mm

Pre Install Clearance Max

 N/A 0.0047 in0.120 mm