The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
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Unit of Measure

Specifications

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 QAACW18A308SB QAACW18A308SC QAACW18A308SEB QAACW18A308SEC QAACW18A308SEM QAACW18A308SEN QAACW18A308SEO QAACW18A308SET QAACW18A308SM QAACW18A308SN QAACW18A308SO QAACW18A308ST

Locking Style

 N/A Double Concentric

Housing Construction

 N/A Piloted Flange Cartridge

UPC Code

 N/A 0883450017909 0883450017916 0883450017930 0883450017947 0883450017954 0883450017961 0883450017978 0883450017985 0883450194259 0883450194433 0883450271424 0883450271608

Dimensions

Dimension BC

 N/A 8.63 in219.2 mm

Dimension C

 N/A 5.125 in130.2 mm

Dimension D

 N/A 7.13 in181.1 mm

Dimension E

 N/A 6.1 in154.9 mm

Dimension B Exp

 N/A 2.54 in64.5 mm

Dimension B Fix

 N/A 2.46 in62.5 mm

Dimension F

 N/A 10-1/4 in260.4 mm

Dimension H

 N/A 0.88 in22.4 mm

Dimension J (Bolt Size)

 N/A 0.75 in20 mm

Dimension M

 N/A 2.59 in65.8 mm

Dimension L Exp

 N/A 4.42 in112.3 mm

Dimension L Fix

 N/A 4.34 in110.2 mm

Dimension RAA

 N/A 0.85 in21.6 mm

Dimension SAA

 N/A 5.19 in131.8 mm

Dimension G

 N/A 7.375 in187.3 mm

Dimension N

 N/A 1.88 in47.8 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 0.060 in0.0024 mm

Pre Install Clearance Max

 N/A 0.100 in0.0039 mm