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Timken QMCW18J303SB is a spherical roller mounted unit with a QMCW cartridge housing and adapter mount locking. This housed unit features a frame size 18 and is designed for imperial shaft applications. The self-aligning spherical roller bearing insert accommodates misalignment and is suitable for heavy-duty industrial environments such as conveyors and processing equipment.
MODEL QMCW18J303SB
$963.20 Each
Prices are subject to change
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Typically Ships in: 1 day
Returnable:No
0.060 mm Shaft Size
3 3/16 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
110.2 mm Dimension R
0.31 in
112.3 mm Dimension L Fix
4.34 in
120.9 mm Dimension B Exp
2.54 in
20 mm Dimension L Exp
4.42 in
219.2 mm Dimension J (Bolt Size)
0.75 in
62.5 mm Dimension BC
8.63 in
64.5 mm Dimension B Fix
2.46 in
7.9 mm Eng Internal Radial Clearance - Max
0.0039 Eng Internal Radial Clearance - Min:0.0024 Engineering group:Mounted Bearing Float:0.083 in
Bearing number
22218 C - Dynamic Load (Basic):79700 lbf 355000 N C0 - Static Load:87200 lbf 388000 N Dimension:4.76 in
Bearing Number
22218
C - Dynamic Load (Basic)
79700 lbf 355000 N
C0 - Static Load
87200 lbf 388000 N
Dimension B Exp
2.54 in 64.5 mm
Dimension B Fix
2.46 in 62.5 mm
Dimension BC
8.63 in 219.2 mm
Dimension C
4.76 in 120.9 mm
Dimension D
7.38 in 187.5 mm
Dimension E
6.1 in 154.9 mm
Dimension F
10.25 in 260.4 mm
Dimension G
7.375 in 187.3 mm
Dimension H
0.88 in 22.4 mm
Dimension J (Bolt Size)
0.75 in 20 mm
Dimension K
1.44 in 36.6 mm
Dimension L Exp
4.42 in 112.3 mm
Dimension L Fix
4.34 in 110.2 mm
Dimension M
2.59 in 65.8 mm
Dimension N
1.88 in 47.8 mm
Dimension R
0.31 in 7.9 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
QMCW18J303SB QMCW18J303SC QMCW18J303SEB QMCW18J303SEC QMCW18J303SEM QMCW18J303SEN QMCW18J303SEO QMCW18J303SET QMCW18J303SM QMCW18J303SN QMCW18J303SO QMCW18J303ST
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
Piloted Flange Cartridge
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 3/16 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 QMCW18J303SB SRB Housed Unit is a high-performance piloted flange bearing designed for demanding applications in various industries. Engineered with precision, this housed unit combines innovative design with robust construction to provide exceptional reliability and efficiency. Built to handle heavy loads and ensure smooth operation, it is an ideal solution for applications requiring durability and performance.
Key Features
- Design: The SRB housed unit features a piloted flange design for easy mounting and alignment in various configurations.
- Material Construction: Made from high-quality steel, ensuring superior strength, resistance to wear, and extended service life.
- Load Capacity: Engineered to support radial loads and axial loads, making it suitable for applications in both horizontal and vertical orientations.
- Sealing Technology: Equipped with advanced sealing systems that protect against contaminants, enhancing operational reliability and reducing maintenance needs.
- Size Specifications: Dimensions optimized for standard installations, providing flexibility in application without compromising performance.
Applications
- Industrial Machinery: Perfect for use in conveyors, manufacturing equipment, and processing systems where robust bearing support is critical.
- Automotive Applications: Suitable for drivetrain components and assembly lines, ensuring smooth operation under heavy loads and dynamic conditions.
- Aerospace Components: Reliable in applications where precision and durability are essential, contributing to overall system efficiency.
Benefits
- Enhanced Reliability: The Timken QMCW18J303SB is designed to minimize downtime, offering reliable performance in critical applications.
- Improved Efficiency: Optimized for reduced friction and wear, leading to lower energy consumption and longer service intervals.
- Versatile Compatibility: Fits seamlessly into existing systems, reducing the need for modifications and ensuring quick installation. --- 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