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Bearing Type:

Bearing Mounting Configuration:

Bearing / Housing Features:

Shaft Size:

Overall Height from Mounting Surface:

Housing:

Bearing:

Shaft Securing Method:

Relubricatable?

Self-lubricating?

Help with Flange Mounted Bearings specifications:

Bearing Design
   Bearing Type:       
   Your choices are...         
   Ball Bearing
Mounted Bearings 2 Bolt Flanges with Stainless Steel Shaft ProtectorsCourtesy of Poly Hi Solidur - Power Transmission Products
 
     Rolling element is a ball.  Ball bearings are used to provide smooth, low friction motion in rotary applications.  Construction consists of an inner and outer ring, balls, and usually a cage or ball separator. 
   Needle Roller Bearing       Rolling element is a needle roller.  Needle roller bearings are designed for radial load applications where a low profile is desired. 
   Plain Bearing
2 Bolt Flange Block BearingCourtesy of Poly Hi Solidur - Power Transmission Products
 
     Bushings / sleeve bearings, also called journal or plain bearings, are used to constrain, guide, or reduce friction in rotary or linear applications.  They work by means of sliding action as opposed to the rolling action used by ball, roller and needle bearings.  As in all bearings, proper lubrication is required to reduce wear and friction.  Terms such as fluid film, self-lubricated, hydrostatic, and hydrodynamic are commonly designations for plain bearings. 
   Roller Bearing       Rolling element is a roller.  Roller bearings are used to provide smooth, low friction motion in rotary applications.  Construction consists of an inner and outer ring, rollers, and usually a cage or roller separator.  The principal types of roller bearings are cylindrical, spherical, and tapered.  The most common type of flange mounted roller bearing is a spherical roller bearing, which is a self-aligning, double row, combination radial and thrust bearing.  
   Other       Other unlisted, specialized, or proprietary bearing type. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Bearing Mounting Configuration:       
   Your choices are...         
   2-Bolt
2 Mounting Bolt Holes (drawing)Courtesy of GlobalSpec, Inc.
 
     2-bolt flanged bearings have a diamond shaped flange with 2 mounting holes. 
   3-Bolt
3 Mounting Bolt Holes (drawing)Courtesy of GlobalSpec, Inc.
 
     Most 3-bolt flanged bearings have a circular mounting flange with three, equally spaced mounting holes.  Other hole configurations, such as an offset pattern, are also available. 
   4-Bolt
4 Mounting Bolt Holes (drawing)Courtesy of GlobalSpec, Inc.
 
     4-bolt flanged bearings have a square or round mounting flange with four mounting holes. 
   Other       Other, unlisted, or proprietary hole configuration. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Bearing / Housing Features       
   Your choices are...         
   Offset Hole Pattern       Hole pattern is offset from the bearing centerline, as opposed to radially symmetrical around the axis of the bearing. 
   Spherical / Self-aligning       Bearing is a spherical plain, spherical roller, or a self-aligning ball bearing.  These bearings allow for minor shaft / bearing misalignments. 
   Split Bearing       Bearing housing and/or bearing is split into two pieces and bolted together. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Bearing Dimensions
   Shaft Size:       The maximum diameter of the shaft or the bore diameter of the bearing. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
   Overall Height from Mounting Surface:
2 Mounting Bolt Holes - showing dimensions from front and side view (drawing)Courtesy of GlobalSpec, Inc.
 
     Overall height above mounting surface. Dimension "H" in the image to the left. 
   Search Logic:      User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
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Material
   Housing:       
   Your choices are...         
   Cast Iron       The term "cast iron" refers not to a single material, but to a family of materials whose major constituent is iron, with important trace amounts of carbon and silicon. Cast irons are natural composite materials whose properties are determined by their microstructures - the stable and metastable phases formed during solidification or subsequent heat treatment. The major microstructural constituents of cast irons are: the chemical and morphological forms taken by carbon, and the continuous metal matrix in which the carbon and/or carbide are dispersed. 
   Plastic
Mounted Bearing 4 Bolt Flanges with Polymer InsertsCourtesy of Poly Hi Solidur - Power Transmission Products
 
     Any of numerous organic, synthetic, or processed materials that are mostly thermoplastic or thermosetting polymers of high molecular weight and that can be made into objects, films, or filaments.  Common plastic materials include Acetal, Nylon / Polyamide and PTFE / Teflon. Nylon Nylon, comprising several grades of polyamides, is a general-purpose material in wide use; it is tough and resistant and has good pressure ratings. PTFE PTFE (polytetrafluoroethylene) is an insoluble compound that exhibits a high degree of chemical resistance and a low coefficient of friction. It is sometimes marketed in proprietary classes of materials such as Teflon®, a registered trademark of DuPont Dow Elastomers. Acetal Acetal polymers are semi-crystalline. They offer excellent inherent lubricity, fatigue resistance, and chemical resistance. Acetals suffer from outgassing problems at elevated temperatures, and are brittle at low temperatures. Glass filled, and added lubrication grades are available, flame-retardant grades are not. Brand names include Celcon® (Hoechst Celanese), Delrin® (Dupont), Thermocomp® (LNP), Ultraform® (BASF), and Acetron® (DSM Polymers). 
   Pressed Steel
Steel Mounted 3 & 4 Bolt FlangesCourtesy of Poly Hi Solidur - Power Transmission Products
 
     The bearing is made of pressed steel, a low carbon steel, which has been pressed rather than machined. 
   Stainless Steel       Stainless steel is chemical and corrosion resistant and can have relatively high-pressure ratings. 
   Other       Unlisted, unspecified, or proprietary material. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Bearing:       
   Your choices are...         
   Steel
Mounted Bearing 2 Bolt Flanges with Stainless Steel Shaft ProtectorsCourtesy of Poly Hi Solidur - Power Transmission Products
 
     A commercial iron that contains carbon in any amount up to about 1.7 percent as an essential alloying constituent. It is malleable when under suitable conditions, and is distinguished from cast iron by its malleability and lower carbon content.   Bearings are usually made of a high carbon steel, such as 52100. 
   Steel - Stainless       Stainless steel is chemical and corrosion resistant and can have relatively high pressure ratings. 
   Bronze - Sintered       Sintered bronze is a porous material that can be impregnated with oil, graphite or PTFE. Not suitable for heavily loaded applications but useful where lubrication is inconvenient. 
   Graphite - Metal Alloy       Bearing surface is an alloy manufactured from molten graphite and metal.  This material is self-lubricating. 
   Iron - Sintered         
   Plastic
Mounted Bearing 2 Bolt Flange with Polymer InsertsCourtesy of Poly Hi Solidur - Power Transmission Products
 
     Any of numerous organic, synthetic, or processed materials that are mostly thermoplastic or thermosetting polymers of high molecular weight and that can be made into objects, films, or filaments.  Common plastic materials include Acetal, Nylon / Polyamide and PTFE / Teflon. Nylon Nylon, comprising several grades of polyamides, is a general-purpose material in wide use; it is tough and resistant and has good pressure ratings. PTFE PTFE (polytetrafluoroethylene) is an insoluble compound that exhibits a high degree of chemical resistance and a low coefficient of friction. It is sometimes marketed in proprietary classes of materials such as Teflon®, a registered trademark of DuPont Dow Elastomers. Acetal Acetal polymers are semi-crystalline. They offer excellent inherent lubricity, fatigue resistance, and chemical resistance. Acetals suffer from outgassing problems at elevated temperatures, and are brittle at low temperatures. Glass filled, and added lubrication grades are available, flame-retardant grades are not. Brand names include Celcon® (Hoechst Celanese), Delrin® (Dupont), Thermocomp® (LNP), Ultraform® (BASF), and Acetron® (DSM Polymers). 
   Other       Unlisted, unspecified, or proprietary material. 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Shaft Securing Method
   Shaft Securing Method       
   Your choices are...         
   None       Bearing has no provisions for securing to a shaft. 
   Setscrew       Bearing has setscrews for securing the inner ring to a shaft. 
   Locking Collar       Bearing has a locknut for securing the inner ring to a shaft. 
   Other         
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Lubrication
   Relubricatable       Bearing can be relubricated, usually by means of a grease fitting mounted on the housing. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Self-lubricating       Bearing is constructed of a material such as oil-impregnated bronze, or graphite / metal alloy that does not require external lubrication. 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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