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Double Concentric Four-Bolt Pillow Block
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All Product Types
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ENGINEERED BEARINGS
>
Mounted Bearings
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Mounted Solid-Block Spherical Roller Bearings
>
Double Concentric Solid-Block Mounted Bearings
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Double Concentric Four-Bolt Pillow Block
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Part Number QAAPR18A304S
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Part Number QAAPR18A304S, Double Concentric Four-Bolt Pillow Block
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Unit of Measure:
Imperial
Metric
Both
Specifications
·
Dimensions
·
Radial and Thrust Factors
·
Engineering Seal Speed
·
Engineering Bearing Attributes
·
Engineering Internal Radial Clearance
Specifications
Engineering Group
Mounted Bearing
Bearing Number
22218
Shaft Size
3 1/4
in
Shaft Size Type
Imperial
Full Timken Part Number
QAAPR18A304SB
QAAPR18A304SC
QAAPR18A304SEB
QAAPR18A304SEC
QAAPR18A304SEM
QAAPR18A304SEN
QAAPR18A304SEO
QAAPR18A304SET
QAAPR18A304SM
QAAPR18A304SN
QAAPR18A304SO
QAAPR18A304ST
Locking Style
Double Concentric
Housing Construction
Four-Bolt Pillow Block
UPC Code
0883450322256
0883450322263
0883450322270
0883450322287
0883450322294
0883450322300
0883450322317
0883450322324
0883450322331
0883450322348
0883450322355
0883450322362
Dimensions
Dimension A
3.75
in
95.3
mm
Dimension B
7.69
in
195.3
mm
Dimension C
5.13
in
130.3
mm
Dimension D Min
9.25
in
235
mm
Dimension D Max
11.25
in
285.8
mm
Dimension E
2.38
in
60.5
mm
Dimension F
13.63
in
346.2
mm
Dimension G
3.75
in
95.3
mm
Dimension H
1.56
in
39.6
mm
Dimension J (Bolt Size)
0.75
in
20
mm
Dimension L
4.47
in
113.5
mm
Dimension M
2.59
in
65.8
mm
Dimension RAA
0.84
in
21.3
mm
Dimension SAA
5.18
in
131.6
mm
Radial and Thrust Factors
C0 - Static Load
87200
lbf
388000
N
C - Dynamic Load (Basic)
79700
lbf
355000
N
e - Geometry Factor
0.23
Y1 - Geometry Factor
2.90
Y2 - Geometry Factor
4.31
Engineering Seal Speed
Oil Lubrication - M/N Seal
1400
rpm
Oil Lubrication - T Seal
2400
rpm
Oil Lubrication - B/C/O Seal
1000
rpm
Grease Lubrication - M/N Seal
1400
rpm
Grease Lubrication - T Seal
2000
rpm
Grease Lubrication - B/C/O Seal
1000
rpm
Engineering Bearing Attributes
Float
0.083
in
2.108
mm
Shaft Tolerance
0.0030
in
0.076
mm
Engineering Internal Radial Clearance
Eng Internal Radial Clearance - Min
0.0024
Eng Internal Radial Clearance - Max
0.0039
Pre Install Clearance Min
0.0024
in
0.060
mm
Pre Install Clearance Max
0.0039
in
0.100
mm
VIEW CAD DRAWING
·
3D
·
2D Front View
·
2D Left View
·
2D Sales Drawing
DOWNLOADS
Bearing Life Calculation Tool
Eng Seal Temperatures
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The Timken Company. ©
The Timken Company.
©
The Timken Company.