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Spyraflo PB1-500-B SAE-840 Oil Impregnated Bronze Bearing Pillow Block, 2 Bolt Holes, 0.50" Bore Diameter, Aluminum, Inch

4.8 out of 5 stars 6 customer reviews

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Specifications for this item
Brand Name Spyraflo
Part Number PB1-500-B
UPC 872871003967
Material Type SAE-840 Bronze in an aluminum housing
System of Measurement Inch
Bore Diameter 1/2  inches
Bore Diameter Tolerance 0.5010 inches / 0.5017  inches
Flange Type Pillow-Block
Flange Center to Center Length 1-3/4  inches
Flange Overall Height 1-1/8  inches
Flange Hole Size 0.28  inches
Flange Overall Length 2-1/4  inches
Flange Outside Diameter 5/8  inches
Flange Thickness 1/4  inches
Overall Height 1-1/8  inches
Overall Length 2-1/4  inches
Thickness 5/8  inches
Overall Width 5/8  inches
Max Rotational Speed 7640  RPM
Static Load Capacity 315  pounds
Dynamic Load Capacity 220  pounds
EAN 0872871003967
Load Capacity 220  pounds
Number of Items 1
UNSPSC Code 31171511

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Product Features

  • Two-bolt housing with sleeve bearing insert for ready-to-mount installation
  • Sintered aluminum housing for high strength-to-weight ratio and corrosion resistance
  • 25 percent oil volume of SAE-840 bronze bearing helps ensure long bearing life
  • Narrow profile allows installation where guided shafts are close together
  • Permanently sealed and lubricated one-piece housing helps extend service life

Product Description

This Spyraflo pillow block bearing has an aluminum housing and an oil-impregnated bronze bearing insert with a 0.500-inch bore diameter. It is suitable for supporting shafts that carry radial loads, such as in material handling. The one-piece sintered aluminum bearing housing is lightweight and corrosion resistant, has a flat square foot to help accurately align the housing, and has two bolt holes. The Society of American Engineers SAE-840 bronze sleeve bearing insert is oil impregnated, containing 25 percent oil volume within the porous structure of the insert to provide a film of lubricant between the bearing and shaft and help ensure long life. This bearing allows self-realignment of up to 5 degrees and compensates for static and dynamic alignment errors, it has an operating temperature range of -20 to 200 degrees F, and it is permanently sealed and lubricated to help extend service life. This sleeve bearing pillow block is suitable for use in material handling applications, such as conveyors.

Mounted bearings combine a bearing mounted inside a housing unit. The bearing housing replaces the need for a casting or weldment to position the bearing securely for reliable operation, and its design determines the type of insert bearing. Insert bearings use rolling elements (ball, cylindrical, spherical, barrel, needle, spindled, or tapered) to maintain the separation between moving parts to reduce rotational friction, and to support radial and axial loads. Available in a variety of materials and mounting configurations, mounted bearings can be one- or two-piece, they can have an extended inner ring and locking device, and they can have seals and end caps that retain lubrication and protect the working parts of the bearing from environmental debris. Mounted bearings support shafts in a variety of mounting configurations (flange block, hanger, pillow block, and take-up block), and are used in a range of applications from light duty shaft guidance on conveyors to road building equipment and crushers.

Spyraflo manufactures bearings and bearing accessories. The company, founded in 1961 and headquartered in Peachtree City, GA, meets International Organization for Standardization (ISO) standard 9001:2008.


Product Details

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  • Shipping Weight: 0.2 ounces
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B003DZ0SEM
  • Average Customer Review: 4.8 out of 5 stars  See all reviews (6 customer reviews)
  • Amazon Best Sellers Rank: #223,234 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
  • Product Warranty: For warranty information about this product, please click here

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Verified Purchase
I am using these bearings in a 2 1/2 inch scale model of a 2 axle railroad side dump car. The car can carry either a person or a load of dirt weighing around 200 lbs. At scale speeds, they seem to work fine and don't generate much heat.
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Verified Purchase
This is a good solid pillow block. The bearing rides smooth and allows for rotation for centering. One slight problem was thr actual bearings are not precision and fitting is required.
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Verified Purchase
These are a very nice product. Work great for my projects and don't interfere with magnetic fields. Would recommend to others.
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