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NTN MU1309UM is a heavy-industrial cylindrical roller bearing with a 45 mm straight bore. It features a non-separable design with an inner ring having two ribs and an outer ring with one rib, plus a retaining ring. The machined brass cage provides durability in high-load applications such as gearboxes and mill housings.
MODEL MU1309UM
$256.72 Each
Prices are subject to change
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Returnable:No
B (in)
1.7717
Bore Type
Round
Bore type
Round
C (in)
3.3902
Cage material
None
Configuration
One
D (in)
3.9370
Dynamic Load Rating
26500 lbf
Dynamic load rating
26500 lbf
Enclosure
Open
F (in)
2.5248
H (in)
3.2079
Material
Hardened alloy steel
Oil Hole
w/o Oil Hole
Oil hole
w/o Oil Hole
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
R (in)
0.0598
r (in)
0.0598
Radial Internal Clearance
CN
Radial internal clearance
CN
Static Load Rating
31000 lbf
Static load rating
31000 lbf
Tolerance
ISO class 0 (RBEC 1)
Type
Cylindrical Roller Bearing
U (Plain Rings)
2.2008 in
V (Rib Rings)
2.3307 in
W
0.9843 in
X (Plain Rings)
3.5591 in
Z (Rib Rings)
3.3898 in
Technical Specifications
Type | Cylindrical Roller Bearing |
Bore Type | Round |
Material | Hardened Alloy Steel |
Cage Material | None |
Configuration | One |
Tolerance | ISO Class 0 (RBEC 1) |
Oil Hole | w/o Oil Hole |
Radial Internal Clearance | CN |
Static Load Rating | 31000 lbf137000 N137.00 kN |
Dynamic Load Rating | 26500 lbf118000 N118.00 kN |
Enclosure | Open |
Weight | 2.167 lb0.983 kg |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
B | 1.7717 in45.000 mm |
D | 3.9370 in100.000 mm |
W | 0.9843 in25.000 mm |
C | 3.3902 in86.110 mm |
F | 2.5248 in64.130 mm |
H | 3.2079 in81.480 mm |
R | 0.0598 in1.520 mm |
U (Plain Rings) | 2.2008 in55.900 mm |
V (Rib Rings) | 2.3307 in59.200 mm |
X (Plain Rings) | 3.5591 in90.400 mm |
Z (Rib Rings) | 3.3898 in86.100 mm |
r | 0.0598 in1.520 mm |
How 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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