R55721 Thrust Washer Bearing

Comprehensive specifications and application details for: R55721 Thrust Washer Bearing.

Summary

Explore detailed summary information for bearing: R55721. Includes NSN, classification group, and identification codes to support sourcing, compliance, and accurate part tracking.

Part Number: R55721
Federal Supply Classification: 3120 Unmounted Plain Bearings
(NSN) National Stock Number: 3120-01-258-0897
Item Name Code: 13211
Federal Item Identification Guide: A045A0
Assigment Date: 06/27/1987

An item of any peripheral shape usually having one flat or spherical surface and a centrally located hole. It is designed for applications involving moving (kinetic) loads. Except for items fabricated from bearing quality synthetic (plastic) or composed of multilayer material, one bearing surface must either have a specific surface finish designation of 32 microinch (0.8 micrometre) or less, arithmetical average (aa) (arithmetic mean deviation) or one of the following conditions: be lapped or ground; have visible or detectable means of lubrication; grooves, indentations; or self-lubrication. The thickness must not exceed 25 percent of the outside diameter of the shortest distance between peripheral flats (when thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance). Excludes:straight, tubular (without flange) items having a bearing surface(s) parallel to the axis of the bore only. See also washer, flat and spacer, sleeve.

8 center hole keyway quantity, round w/keyways center hole shape style, square all corners corner shape, 45.0 rockwell c minimum and 50.0 rockwell c maximum overall hardness rating, rectangular cross-sectional shape style

Datasheet

Below are the comprehensive technical specifications for bearing: 3120-01-258-0897 . Find dimensions, materials, tolerances, performance characteristics, etc.

Center Hole Keyway Quantity: 8
Center Hole Shape Style: round w/keyways
Corner Shape: square all corners
Cross-Sectional Shape Style: rectangular
Hardness Rating: 45.0 rockwell c minimum and 50.0 rockwell c maximum overall
Keyway Quantity: 8
Keyway Radius: 0.0300 inches minimum and 0.0500 inches maximum
Major Diameter: 1.9010 inches minimum and 1.9050 inches maximum
Outside Diameter: 2.2800 inches nominal
Overall Thickness: 0.1630 inches minimum and 0.1670 inches maximum
Material Document And Classification: sae assn std single material response overall
Material: steel comp 1552 overall
Minor Diameter: 1.7550 inches minimum and 1.7650 inches maximum
Washer Keyway Depth: 0.0100 inches minimum and 0.0300 inches maximum
Style Designator: round w/keyways
Surface Condition: ground

Frequently Asked Questions

Find quick answers to common questions about bearing: R55721. Explore technical specifications, installation tips, maintenance guidelines, regulatory requirements, and troubleshooting advice.

What is the FSCG of the NSN 3120-01-258-0897?: The FSCG of the NSN 3120-01-258-0897 is 3120

Does the NSN 3120-01-258-0897 have a Schedule B code assigned?: Yes, the Schedule B code is 8482105008

Does NSN 3120-01-258-0897 require demilitarization?: Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 3120-01-258-0897 contain precious materials?: Item does not contain precious metal.

Does NSN 3120-01-258-0897 contain hazardous materials?: Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.