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Timken QMPR18J304ST is a two-bolt pillow block mounted spherical roller bearing unit. This heavy-duty housed unit features a frame size 18 cast iron housing and a setscrew locking mechanism for shaft attachment. The spherical roller bearing insert provides self-alignment capability for applications with shaft misalignment, such as conveyors, fans, and industrial gearboxes.
MODEL QMPR18J304ST
$899.80 Each
Prices are subject to change
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Typically Ships in: 1 day
Returnable:No
0.060 mm Shaft Size
3 1/4 in Shaft Tolerance:0.0030 in
0.076 mm Shaft size type
Imperial Y1 - Geometry Factor:2.90 Y2 - Geometry Factor:4.31 e - Geometry Factor:0.23
0.100 mm Pre Install Clearance Min
0.0024 in
20 mm Dimension R
0.32 in
235 mm Dimension J (Bolt Size)
0.75 in
285.8 mm Dimension D Min
9.25 in
8.1 mm Eng Internal Radial Clearance - Max
0.0039 Eng Internal Radial Clearance - Min:0.0024 Engineering group:Mounted Bearing Float:0.083 in
95.3 mm Dimension D Max
11.25 in
Bearing number
22218 C - Dynamic Load (Basic):79700 lbf 355000 N C0 - Static Load:87200 lbf 388000 N Dimension:3.75 in
Bearing Number
22218
C - Dynamic Load (Basic)
79700 lbf 355000 N
C0 - Static Load
87200 lbf 388000 N
Dimension A
3.75 in 95.3 mm
Dimension B
7.69 in 195.3 mm
Dimension C
4.76 in 120.9 mm
Dimension D Max
11.25 in 285.8 mm
Dimension D Min
9.25 in 235 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 K
1.44 in 36.6 mm
Dimension L
4.46 in 113.3 mm
Dimension M
2.59 in 65.8 mm
Dimension R
0.32 in 8.1 mm
Dimension S
4.03 in 102.4 mm
Dynamic Load (Basic)
79700 lbf
e - Geometry Factor
0.23
Eng Internal Radial Clearance - Max
0.0039
Eng Internal Radial Clearance - Min
0.0024
Eng Internal Radial ClearancMax
0.0039
Eng Internal Radial ClearancMin
0.0024
Engineering Group
Mounted Bearing
Float
0.083 in 2.108 mm
Full Timken Part Number
QMPR18J304SB QMPR18J304SC QMPR18J304SEB QMPR18J304SEC QMPR18J304SEM QMPR18J304SEN QMPR18J304SEO QMPR18J304SET QMPR18J304SM QMPR18J304SN QMPR18J304SO QMPR18J304ST
Geometry Factor
4.31
Grease Lubrication - B/C/O Seal
1000 rpm
Grease Lubrication - M/N Seal
1400 rpm
Grease Lubrication - T Seal
2000 rpm
Housing Construction
Four-Bolt Pillow Block
Locking Style
Eccentric
Oil Lubrication - B/C/O Seal
1000 rpm
Oil Lubrication - M/N Seal
1400 rpm
Oil Lubrication - T Seal
2400 rpm
Pre Install Clearance Max
0.0039 in 0.100 mm
Pre Install Clearance Min
0.0024 in 0.060 mm
Shaft Size
3 1/4 in
Shaft Size Type
Imperial
Shaft Tolerance
0.0030 in 0.076 mm
Static Load
87200 lbf
Y1 - Geometry Factor
2.90
Y2 - Geometry Factor
4.31
Bearings ## Overview The **Timken QMPR18J304ST SRB Housed Unit** is a high-performance 2-bolt pillow block bearing designed to provide robust support and reliable operation in various industrial applications. Engineered with precision, this housed unit offers a unique combination of durability and adaptability, making it an ideal choice for demanding environments. Its innovative design includes features that enhance its efficiency and longevity, ensuring optimal performance in a range of operational conditions. ## Key Features • **Robust Construction**: Made from high-grade materials to withstand heavy loads and resist wear, ensuring long-lasting durability. • **Precision Engineering**: Designed with precision tolerances to minimize friction and optimize performance, contributing to smoother operations. • **Easy Installation**: The 2-bolt mounting design allows for quick and straightforward installation, reducing downtime during setup. • **Versatile Compatibility**: Suitable for a wide range of applications across various industries, including automotive and industrial machinery. • **Maintenance-Friendly**: Features that facilitate easy maintenance and lubrication, prolonging the life of the bearing and reducing operational costs. ## Applications • **Industrial Machinery**: Ideal for supporting rotating shafts in various types of machinery, including conveyors and mixers. • **Automotive Applications**: Suitable for use in automotive components, where reliability and performance are critical. • **Heavy Equipment**: Designed to handle the rigors of heavy equipment operations, ensuring consistent performance in challenging environments. ## Benefits • **Enhanced Reliability**: The Timken brand is synonymous with quality and reliability, ensuring that your operations run smoothly without unexpected downtime. • **Increased Efficiency**: The precision design minimizes energy losses, contributing to overall operational efficiency and reducing costs. • **Longevity and Durability**: Built to withstand harsh conditions, the QMPR18J304ST ensures a long service life, minimizing the need for replacements. --- *Product information compiled with AI assistance for reference purposes.*
SKU: 5066946
Best company to buy from
I always buy from MRO is a very reliable company to work with
Read moreHow do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.
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SKU: 5066946
Best company to buy from
I always buy from MRO is a very reliable company to work with
Read more