

Sealmaster NP-25 Mounted Cast Iron Two Bolt Pillow Block Ball Bearing Steel, Black Oxided - Setscrew Lock
- Regular price
- $383.00
- Sale price
- $383.00
- Regular price
-
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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 Width (in) | 2.13 in |
Overall Length (in) | 7.25 in |
Overall Height (in) | 3.94 in |
Base Width (in) | 2.13 in |
Bolt Size (in) | 1/2 in |
Bore Diameter (in) | 1.5625 in |
Base to Center Height (in) | 2.13 in |
Foot Height (in) | 0.69 in |
Length Through Bore (in) | 1.938 in |
Bolt Spacing Max (in) | 6.06 in |
Bolt Spacing Min (in) | 5.44 in |
Centerline to Outermost Bearing Face (in) | 1.188 in |
Technical Specifications
Housing Base | Solid |
Rolling Element | Ball Bearing |
Bore Shape | Straight |
Housing Construction | One Piece |
Misalignment Type | Static Only |
Housing Color | Black |
Outer Ring Land Profile | Standard |
Cage Material | PPS - Polyphenylene Sulfide |
Housing Type | Pillow Block, Two Bolt |
Seal Type | Felt Labyrinth Seal |
Housing Style | Pillow Block |
Ability to Relubricate | Yes |
Setscrew Torque (in-lbs) | 125-165 in/lbs |
Inner Race Heat Treat Method | Zone-Hardened |
Vibration Frequency Outer Ring Defect | 0.0673 cps |
Bearing Insert Finish | Black Oxide |
Bearing Insert Material | 52100 Bearing Steel |
Static Load Rating (lb) | 5,139 lb |
Size Code | 2-111 |
Maximum Speed (RPM) | 4150 rpm |
Misalignment Capability | ±2.0° Misalignment - Static Only |
Shaft Locking Type | Set Screw |
Base Length (in) | 7.50 in |
Bearing Type | Standard Duty |
Lubricant | Lithium Complex NLGI 2 Grease |
Housing Coating | Powder Coated |
End Cap Available | No |
Cage Type | Land Riding Retainer |
Vibration Frequency Inner Ring Defect | 0.0994 cps |
Dynamic Load Rating (lb) | 7,901 lb |
Vibration Frequency Roller Spin | 0.0417 cps |
Fixed vs. Expansion | Fixed |
Inner Ring Outside Diameter (in) | 2.063 in |
Insert | 2-19 |
Radial Clearance | Standard |
Housing Material | Cast Iron |
Max Operating Temperature (F) | 220 °F |
Vibration Frequency Fundamental Train | 0.0067 cps |
Grease Fitting Thread Size | 1/4-28 |
General Specifications
UPC | 662461001660 |
Weight | 5.80 LB |
Packaged Length | 4.63 IN |
Packaged Width | 2.31 IN |
Packaged Height | 7.50 IN |
HTC | 8483.20.8040 |
Country of Origin | United States of America |
Manuals
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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.