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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 3/4 in

Shaft Size Type

 N/A Imperial

Full Timken Part Number

 N/A QATU20A312SB QATU20A312SC QATU20A312SEB QATU20A312SEC QATU20A312SEM QATU20A312SEN QATU20A312SEO QATU20A312SET QATU20A312SM QATU20A312SN QATU20A312SO QATU20A312ST

Locking Style

 N/A Single Concentric

Housing Construction

 N/A Top Pull Take-Up

Other Dimensions

Dimension A1

 N/A 4.76 in121 mm

Dimension B

 N/A 4.63 in117.6 mm

Dimension C

 N/A 6 in152.4 mm

Dimension D

 N/A 11.38 in289.1 mm

Dimension E

 N/A 9.25 in234.9 mm

Dimension F

 N/A 2.5 in63.5 mm

Dimension G

 N/A 3.13 in79.5 mm

Dimension H

 N/A 5.5 in139.7 mm

Dimension J

 N/A 2.31 in58.7 mm

Dimension K

 N/A 1.63 in41.3 mm

Dimension L

 N/A 11 in279.4 mm

Dimension M

 N/A 2.97 in75.4 mm

Dimension N

 N/A 4.97 in126.1 mm

Dimension P

 N/A 10.5 in266.7 mm

Dimension Q

 N/A 1.31 in33.3 mm

Dimension RA

 N/A 0.37 in9.4 mm

Dimension S

 N/A 1.38 in35.1 mm

Dimension TA

 N/A 4.59 in116.7 mm

Dimension U

 N/A 0.81 in20.6 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 0.08 in2.03 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