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Unit of Measure

Specifications

Engineering Group

N/A Mounted Bearing

Bearing Number

N/A 22218

Shaft Size

N/A 3.5000 in

Shaft Size Type

N/A Imperial

Full Timken Part Number

N/A QATP18A308SB QATP18A308SC QATP18A308SEB QATP18A308SEC QATP18A308SEM QATP18A308SEN QATP18A308SEO QATP18A308SET QATP18A308SM QATP18A308SN QATP18A308SO QATP18A308ST

Locking Style

N/A Single Concentric

Housing Construction

N/A Top Pull Take-Up

Dimensions

Dimension A1

N/A 4.32 in109.7 mm

Dimension B

N/A 4.09 in103.9 mm

Dimension C

N/A 5.13 in130.2 mm

Dimension D

N/A 9.94 in252.5 mm

Dimension E

N/A 8.41 in213.6 mm

Dimension F

N/A 2.41 in61.3 mm

Dimension G

N/A 3.54 in90 mm

Dimension H

N/A 4.5 in114.3 mm

Dimension J

N/A 2.25 in57.1 mm

Dimension K

N/A 1.44 in36.5 mm

Dimension L

N/A 9.5 in241.3 mm

Dimension M

N/A 2.59 in65.9 mm

Dimension N

N/A 4.37 in110.9 mm

Dimension P

N/A 9 in228.6 mm

Dimension Q

N/A 1.31 in33.3 mm

Dimension RA

N/A 0.34 in8.6 mm

Dimension S

N/A 1.38 in35.1 mm

Dimension TA

N/A 4.03 in102.4 mm

Dimension U

N/A 0.81 in20.6 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 0.08 in2.03 mm

Shaft Tolerance

N/A 0.0030 in0.076 mm

Engineering Internal Radial Clearance

Eng Internal Radial Clearance - Min

N/A 0.0024

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
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