We never sell your data to third parties
Image for Illustration purposes only. Actual product may vary
Timken QMPX18J307SEM is a spherical roller mounted unit (SRB housed unit) with a two-bolt pillow block mount (QMPX). This frame size 18 unit is designed for an imperial shaft and features SEM locking. It is a heavy-duty mounted bearing suitable for applications with high radial loads and misalignment, such as conveyors, fans, and industrial gearboxes.
MODEL QMPX18J307SEM
$1,038.25 Each
Prices are subject to change
FREE SHIPPING ON ORDERS OVER $100
Select Quantity
Typically Ships in: 1 day
Returnable:No
0.060 mm Shaft Size
3 7/16 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
101.6 mm Dimension D Max
12.19 in
20 mm Dimension R
0.32 in
274.6 mm Dimension J (Bolt Size)
0.75 in
309.6 mm Dimension D Min
10.81 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
Bearing number
22218 C - Dynamic Load (Basic):79700 lbf 355000 N C0 - Static Load:87200 lbf 388000 N Dimension:4 in
Bearing Number
22218
C - Dynamic Load (Basic)
79700 lbf 355000 N
C0 - Static Load
87200 lbf 388000 N
Dimension A
4 in 101.6 mm
Dimension B
7.92 in 201.2 mm
Dimension C
4.76 in 120.9 mm
Dimension D Max
12.19 in 309.6 mm
Dimension D Min
10.81 in 274.6 mm
Dimension E
3 in 76.2 mm
Dimension F
15 in 381 mm
Dimension G
4.75 in 120.7 mm
Dimension H
1.5 in 38.1 mm
Dimension J (Bolt Size)
0.75 in 20 mm
Dimension K
1.44 in 36.6 mm
Dimension L
4.96 in 126 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
QMPX18J307SB QMPX18J307SC QMPX18J307SEB QMPX18J307SEC QMPX18J307SEM QMPX18J307SEN QMPX18J307SEO QMPX18J307SET QMPX18J307SM QMPX18J307SN QMPX18J307SO QMPX18J307ST
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 7/16 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 QMPX18J307SEM SRB Housed Unit** is an advanced 2-bolt pillow block bearing designed for optimal performance and reliability in a variety of industrial applications. This housed unit is engineered to support rotating shafts, providing excellent load-bearing capabilities while minimizing maintenance requirements. With Timken's reputation for quality and precision, this bearing is an ideal choice for enhancing the efficiency of your machinery. ## Key Features • **Design**: The QMPX18J307SEM features a robust 2-bolt pillow block design that simplifies mounting and alignment, ensuring reliable operation in demanding environments. • **Material Construction**: Constructed from high-quality steel, this bearing unit is designed to withstand harsh conditions, providing exceptional durability and corrosion resistance. • **Load Capacity**: Designed to handle radial loads and moderate axial loads, this unit supports a wide range of applications with a load rating that ensures longevity and performance. • **Seal Type**: Equipped with high-performance seals, it effectively prevents contamination from dust and moisture, enhancing the bearing's operational lifespan. • **Interchangeability**: The QMPX18J307SEM is compatible with standard mounting dimensions, allowing easy integration into existing setups. ## Applications • **Industrial Machinery**: Suitable for use in conveyors, fans, and other rotating equipment within manufacturing environments. • **Agricultural Equipment**: Ideal for applications in tractors and other agricultural machinery that require robust and reliable bearing solutions. • **Material Handling**: Perfect for equipment such as pallet jacks and forklifts, where dependable load support is essential. • **Compatibility**: Designed to fit seamlessly with other standard components in the Timken product line, facilitating easy upgrades and replacements. ## Benefits • **Enhanced Reliability**: The superior design and materials ensure minimal wear and tear, reducing the need for frequent replacements and maintenance. • **Operational Efficiency**: By providing smooth and stable performance, this bearing unit contributes to the overall efficiency of your machinery, leading to increased productivity. • **Versatile Use**: The QMPX18J307SEM is versatile enough to be used across various industries, making it a valuable addition to any equipment lineup. • **Cost-Effective**: The durability and efficiency of this bearing unit lead to lower operational costs over time, making it a sound investment for businesses. --- *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.
SKU: 5066946
Best company to buy from
I always buy from MRO is a very reliable company to work with
Read more