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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 1/2 in

Shaft Size Type

 N/A Imperial

Full Timken Part Number

 N/A QACW18A308SB QACW18A308SC QACW18A308SEB QACW18A308SEC QACW18A308SEM QACW18A308SEN QACW18A308SEO QACW18A308SET QACW18A308SM QACW18A308SN QACW18A308SO QACW18A308ST

Locking Style

 N/A Single Concentric

Housing Construction

 N/A Piloted Flange Cartridge

UPC Code

 N/A 0883450037501 0883450037518 0883450037532 0883450037549 0883450037556 0883450037563 0883450037570 0883450037587 0883450193931 0883450194099 0883450271103 0883450271264

Other Dimensions

Dimension BC

 N/A 8.63 in219.2 mm

Dimension B Exp

 N/A 2.54 in64.5 mm

Dimension B Fix

 N/A 2.46 in62.5 mm

Dimension C

 N/A 5.13 in130.3 mm

Dimension D

 N/A 7.13 in181.1 mm

Dimension E

 N/A 6.1 in154.9 mm

Dimension F

 N/A 10.2500 in260.4 mm

Dimension G

 N/A 7.38 in187.3 mm

Dimension H

 N/A 0.88 in22.4 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 4.42 in112.3 mm

Dimension L Fix

 N/A 4.34 in110.2 mm

Dimension M

 N/A 2.59 in65.8 mm

Dimension N

 N/A 1.88 in47.8 mm

Dimension RA

 N/A 0.3 in7.6 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