Aerospace / Military
Aerospace Series General Aviation Rod Ends Spherical Bearings Mil Spec Series Rod Ends Spherical Bearings Bushings Approved Part Numbers
Commercial / Industrial
Rod End Bearings Inch Rod Ends Metric Rod Ends Spherical Bearings Inch Spherical Bearings Metric Spherical Bearings
Technical Resources
Terms and Definitions Articles Technical Data FAQs Key Term Translation Custom Engineered Products
Online Catalog
Engineers power search our entire catalog of bearing and bushings, with access to every attribute and technical specification possible. View our online catalog...
Request Information
 
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 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

Other 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