

Sealmaster NP-211 Mounted Cast Iron Two Bolt Pillow Block Ball Bearing Steel, Black Oxided - Setscrew Lock
- Regular price
- $689.00
- Sale price
- $689.00
- Regular price
-
Free shipping on orders over $100
Use code at checkout.
Orders placed before 3:00pm (Est) ship same day
Lightning-fast shipping, guaranteed.

Key Features
- Powder coated epoxy cast iron housing with extended inner ring bearings
- Zone hardened inner ring with 120° spacing setscrew locking with diamond faceted setscrews
- Unique land riding retainer design provides superior pocket clearance that allows for 360° grease circulation around the rolling elements resulting in better retained and utilized lubrication.
- Sealmaster® exclusive lock pin and dimple for direct lubrication and anti-rotation
Description
The Sealmaster Mounted Cast Iron Two Bolt Pillow Block Ball Bearing is a robust, ready-to-mount bearing unit designed for reliable performance in normal to medium-duty applications. Featuring a solid one-piece cast iron housing, this pillow block ensures maximum strength and rigidity. The bearing insert, crafted from 52100 bearing steel with a black oxide coating, provides excellent corrosion resistance and durability. It utilizes a setscrew locking collar or Sealmaster’s exclusive Skwezloc® concentric locking collar for secure shaft attachment, minimizing slippage. The unit includes felt seals to protect against contaminants and retain lubrication, with a relubricatable design for extended bearing life. The two-bolt base allows for straightforward installation, supporting radial or radial-and-thrust loads. With a wide range of bore sizes and configurations, this bearing is ideal for applications such as conveyors, industrial machinery, and material handling systems. Sealmaster’s innovative features, like the lock pin and dimple system, enable direct lubrication and prevent outer ring rotation, ensuring optimal performance and reduced maintenance.
Specifications
Dimensions
Overall Height (in) | 5.00 in |
Base Width (in) | 2.38 in |
Overall Width (in) | 2.38 in |
Overall Length (in) | 8.63 in |
Bolt Size (in) | 5/8 in |
Bore Diameter (mm) | 55 mm |
Base to Center Height (in) | 2.5000 in |
Foot Height (in) | 0.75 in |
Length Through Bore (in) | 2.1875 in |
Centerline to Outermost Bearing Face (in) | 1.313 in |
Bolt Spacing Max (in) | 7 in |
Bolt Spacing Min (in) | 6.5 in |
Technical Specifications
Housing Base | Solid |
Rolling Element | Ball Bearing |
Bore Shape | Straight |
Housing Construction | One Piece |
Housing Color | Black |
Outer Ring Land Profile | Standard |
Misalignment Type | Static Only |
Cage Material | PPS - Polyphenylene Sulfide |
Housing Type | Pillow Block, Two Bolt |
Seal Type | Felt Labyrinth Seal |
Housing Style | Pillow Block |
Ability to Relubricate | Yes |
Inner Race Heat Treat Method | Zone-Hardened |
Cage Type | Land Riding Retainer |
Grease Fitting Thread Size | 1/8 NPT |
Static Load Rating (lb) | 6,601 lb |
Bearing Type | Standard Duty |
Housing Coating | Powder Coated |
Fixed vs. Expansion | Fixed |
Vibration Frequency Inner Ring Defect | 0.0987 cps |
Shaft Locking Type | Set Screw |
Insert | 5211 |
Inner Ring Outside Diameter (in) | 2.719 in |
Vibration Frequency Fundamental Train | 0.0068 cps |
Bearing Insert Finish | Black Oxide |
Vibration Frequency Roller Spin | 0.0437 cps |
Housing Material | Cast Iron |
Misalignment Capability | ±2.0° Misalignment - Static Only |
Radial Clearance | Standard |
End Cap Available | No |
Size Code | 2-23 |
Maximum Speed (RPM) | 3250 rpm |
Dynamic Load Rating (lb) | 9,752 lb |
Lubricant | Lithium Complex NLGI 2 Grease |
Bearing Insert Material | 52100 Bearing Steel |
Base Length (in) | 8.63 in |
Max Operating Temperature (F) | 220 °F |
Vibration Frequency Outer Ring Defect | 0.068 cps |
General Specifications
UPC | 662461051825 |
Weight | 9.58 LB |
Packaged Length | 8.88 IN |
Packaged Width | 5.94 IN |
Packaged Height | 2.63 IN |
HTC | 8483.20.8040 |
Country of Origin | United States of America |
Manuals
Check Out These Related Products
Disclaimer: Apollo Industries is not an authorized distributor, reseller, or representative of Regal Rexnord Corporation. All Regal Rexnord Corporation trademarks and product names are the property of their respective owners. We sell genuine Regal Rexnord Corporation products purchased through independent channels.