# NTN HMK1225 Drawn Cup Needle Roller Bearing - 12 mm Bore, Open, Steel Cage - MROSupply.com

***NTN HMK1225 drawn cup needle roller bearing with 12 mm bore, open design, and steel cage. Heavy-duty HMK series for high load capacity in a compact radial cross-section. Suitable for applications requiring a thin-walled bearing with high stiffness.***



## Product details:

- Catalog number: HMK1225
- SKU: 285104
- Price: ***$6.16*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [Full Complement Needle Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/needle-roller-bearings/full-complement-needle-roller-bearings/)
    - [Needle Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/needle-roller-bearings/)
    - [Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 0.051 lb


## Product images:
- https://static.mrosupply.com/images/noimage.webp


## Product attributes;

  
- 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
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/44/5044706/1238_S_OLLt6lh.png)
- [Drawing](https://documents.mrosupply.com/product_documents/HM/HMK2525/1238_S_eX7BklM.png)






## FAQ:

- 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.