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NTN HMK1225 is a drawn cup needle roller bearing with a 12 mm bore. This open-type bearing features a steel cage and a steel construction. The HMK series is designed for heavy-duty applications requiring high load capacity in a compact radial cross-section.
MODEL HMK1225
$6.16 Each
Prices are subject to change
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Select Quantity
Typically Ships in: 1 day
Returnable:No
Bearing Type
Needle Roller Bearing
Bore Type
Round
Bore type
Round
C (in)
0.9843
Cage Material
Steel
Cage material
Steel
Configuration
One
D (in)
0.7480
Dynamic Load Rating
3450 lbf
Dynamic load rating
3450 lbf
Enclosure
Open
Fw
0.4724 in
I.D.
12 mm
Limiting Speed - Grease
13000 RPM
Limiting speed - grease
13000 RPM
Limiting Speed - Oil
20000 RPM
Limiting speed - oil
20000 RPM
Material
Steel
O.D.
19 mm
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
Precision
ISO class 0
Radial Internal Clearance
CN
Radial internal clearance
CN
Static Load Rating
4200 lbf
Static load rating
4200 lbf
Type
Drawn Cup Needle Roller Bearing
Technical Specifications
| Type | Drawn Cup Needle Roller Bearing |
|---|---|
| Bore Type | Round |
| Material | Steel |
| Cage Material | Steel |
| Limiting Speed - Oil | 20000 RPM |
| Limiting Speed - Grease | 13000 RPM |
| Bearing Type | Needle Roller Bearing |
| Configuration | One |
| Enclosure | Open |
| Radial Internal Clearance | CN |
| Precision | ISO Class 0 |
| Oil Hole | w/o Oil Hole |
| Static Load Rating | 4200 lbf18600 N18.60 kN |
| Dynamic Load Rating | 3450 lbf15300 N15.30 kN |
| Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
| Fw | 0.4724 in12.000 mm |
|---|---|
| D | 0.7480 in19.000 mm |
| C | 0.9843 in25.000 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.