# SealMaster MST-23C 703221 Take-Up Bearing Unit 1-7/16" Bore Set Screw Lock Cast Iron Wide-Slot Take-Up - MROSupply.com

***SealMaster MST-23C 703221 is a 1-7/16" bore take-up bearing unit with a cast iron wide-slot housing. The 52100 bearing steel insert is black oxide coated and secured with a set screw lock. A single-lip contact seal retains grease and excludes contaminants. This Gold Line unit is pre-lubricated for general industrial conveyor and tensioning applications.***



## Product details:

- Catalog number: 703221
- SKU: 2253961
- Price: ***$300.36*** Each
- Quantity: This product has a minimum order quantity of 10.
This is the minimum order quantity available when purchasing this product.
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [SealMaster](https://www.mrosupply.com/brands/sealmaster/)
- Category: 
    - [Take-Up Bearing Units](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/take-up-bearings/take-up-bearing-units/)
    - [Take-Up Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/take-up-bearings/)
    - [Mounted Ball Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/)
    - [Mounted Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 6.200 lb
- UPC: 662461020418
- Technicall support: contact supplier for technical support on 800-626-2120


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


## Product attributes;

  
- Ability to Relubricate: Yes
  

  
- Adjusting Screw Clearance Hole Diameter (in): 1.13
  

  
- Adjusting Screw Square Nut Seat Height (in): 1.94
  

  
- Base to Center Height (in): 3.5
  

  
- Bearing Insert Finish: Black Oxide
  

  
- Bearing Insert Material: 52100 Bearing Steel
  

  
- Bearing Type: Medium Duty
  

  
- Bore Diameter (in): 1.4375
  

  
- Bore Shape: Straight
  

  
- Cage Material: PPS - Polyphenylene Sulfide
  

  
- Cage Type: Land Riding Retainer
  

  
- Carriage Bolt Size (in): 3/4
  

  
- Centerline to Outermost Bearing Face (in): 1.188
  

  
- Dynamic Load Rating (lb): 7340
  

  
- End Cap: No
  

  
- Fixed vs. Expansion: Fixed
  

  
- Grease Fitting Thread Size: 1/4-28
  

  
- Height: 7.5
  

  
- Housing: Take-Up Block, Wide Slot
  

  
- Housing Coating: Powder Coated
  

  
- Housing Color: Black
  

  
- Housing Construction: One Piece
  

  
- Housing Material: Cast Iron
  

  
- Housing Style: Take-Up Block
  

  
- Inner Race Heat Treat Method: Zone-Hardened
  

  
- Inner Ring OD (in): 2.063
  

  
- Insert: 3-17C
  

  
- Length: 4.63
  

  
- Length Through Bore (in): 1.938
  

  
- Lubricant: Lithium Complex NLGI 2 Grease
  

  
- Max Operating Temperature (F): 220
  

  
- Maximum Speed (RPM): 4150
  

  
- Misalignment Capability: ±2.0° Misalignment - Static Only
  

  
- Misalignment Type: Static Only
  

  
- Outer Ring Land Profile: Standard
  

  
- Overall Height (in): 4.5
  

  
- Overall Length (in): 5.69
  

  
- Overall Width (in): 2.13
  

  
- Radial Clearance: Standard
  

  
- Rolling element: Ball Bearing
  

  
- Seal: Single Lip Contact Seal
  

  
- Series: MST
  

  
- Setscrew Torque (in-lbs): 125-165
  

  
- Shaft Locking Type: Set Screw
  

  
- Size Code: 2-19
  

  
- Slot Spacing (in): 4
  

  
- Slot Width (in): 0.688
  

  
- Static Load Rating (lb): 4467
  

  
- Vibration Frequency Fundamental Train: 0.007
  

  
- Vibration Frequency Inner Ring Defect: 0.091
  

  
- Vibration Frequency Outer Ring Defect: 0.059
  

  
- Vibration Frequency Roller Spin: 0.038
  

  
- Width: 2.31
  
## Product documents / software:

- [Catalog Page](https://documents.mrosupply.com/product_documents/MS/MST-310/MCC12004E_G74.pdf)
- [Drawing](https://documents.mrosupply.com/product_documents/MS/MST-310/MST.gif)
- [3D Drawing IGES](https://documents.mrosupply.com/product_documents/MS/MST-23C/regalpts_beloit_PTS-MST-23C-DEFAULT_8cKbeSO.IGS)

## Product's reviews:
- Excelent - excelent
- Drum bearing - Very easy to order, arrived very quickly, We will be ordering more items from here in the future.
- Response - Very knowledgeable sales rep. Excellent delivery time. Very important when supply chains are challenging.
- Solutions - Fast service, and excellent competitive price.




## 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.