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Unit of Measure

Key Dimensions

Engineering Group

 N/A Mounted Bearing

Bearing Number

 N/A 22218

Shaft Size

 N/A 3 1/4 in

Shaft Size Type

 N/A Imperial

Full Timken Part Number

 N/A QAF18A304SB QAF18A304SC QAF18A304SEB QAF18A304SEC QAF18A304SEM QAF18A304SEN QAF18A304SEO QAF18A304SET QAF18A304SM QAF18A304SN QAF18A304SO QAF18A304ST

Locking Style

 N/A Single Concentric

Housing Construction

 N/A Four-Bolt Square Flange

UPC Code

 N/A 0883450326100 0883450326117 0883450326124 0883450326131 0883450326148 0883450326155 0883450326162 0883450326179 0883450326186 0883450326193 0883450326209 0883450326216

Other Dimensions

Dimension BC

 N/A 9.91 in251.7 mm

Dimension C

 N/A 5.13 in130.3 mm

Dimension D

 N/A 7.63 in193.8 mm

Dimension E

 N/A 7 in177.8 mm

Dimension F

 N/A 8.63 in219.2 mm

Dimension H

 N/A 1.31 in33.3 mm

Dimension J (Bolt Size)

 N/A 0.75 in20 mm

Dimension KA

 N/A 1.44 in36.6 mm

Dimension L Exp

 N/A 4.3 in109.2 mm

Dimension L Fix

 N/A 4.22 in107.2 mm

Dimension M

 N/A 2.59 in65.8 mm

Dimension N

 N/A 3.31 in84.1 mm

Dimension RA

 N/A 0.19 in4.8 mm

Dimension SA

 N/A 4.03 in102.4 mm

Radial and Thrust Factors

C0 - Static Load

 N/A 87200 lbf388000 N

C - Dynamic Load (Basic)

 N/A 79700 lbf355000 N

e - Geometry Factor

 N/A 0.23

Y1 - Geometry Factor

 N/A 2.90

Y2 - Geometry Factor

 N/A 4.31

Engineering Seal Speed

Oil Lubrication - M/N Seal

 N/A 1400 rpm

Oil Lubrication - T Seal

 N/A 2400 rpm

Oil Lubrication - B/C/O Seal

 N/A 1000 rpm

Grease Lubrication - M/N Seal

 N/A 1400 rpm

Grease Lubrication - T Seal

 N/A 2000 rpm

Grease Lubrication - B/C/O Seal

 N/A 1000 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 0.0024

Eng Internal Radial Clearance - Max

 N/A 0.0039

Pre Install Clearance Min

 N/A 0.0024 in0.060 mm

Pre Install Clearance Max

 N/A 0.0039 in0.100 mm