KR4-CNB Self-Aligning Plain Bearing

Comprehensive specifications and application details for: KR4-CNB Self-Aligning Plain Bearing.

Summary

Explore detailed summary information for bearing: KR4-CNB. Includes NSN, classification group, and identification codes to support sourcing, compliance, and accurate part tracking.

Part Number: KR4-CNB
Federal Supply Classification: 3120 Unmounted Plain Bearings
(NSN) National Stock Number: 3120-00-851-5704
Item Name Code: 13208
Federal Item Identification Guide: A045A0
Assigment Date: 01/16/1967

A detachable assembly in or on which a journal, gudgeon, pivot, or the like moves. It is used to carry a load and to reduce sliding friction. It does not employ rolling elements. The item consists of a bored precision ground ball (or spherical plain bearing) around which an outer ring is fitted. The assembly may be either separable or nonseparable. Excludes:bearing, plain, rod end and bearing, plain, spherical.

28.0 rockwell c nominal outer race member hardness rating, 369a7951-7,02731 mfr ref single material response race liner material document and classification, 58.0 rockwell c nominal inner member hardness rating, 0.3410 inches minimum and 0.3430 inches maximum inner member width, 0.2495 inches minimum and 0.2500 inches maximum bore diameter

Datasheet

Below are the comprehensive technical specifications for bearing: 3120-00-851-5704 . Find dimensions, materials, tolerances, performance characteristics, etc.

Bore Diameter: 0.2495 inches minimum and 0.2500 inches maximum
Hardness Rating: 58.0 rockwell c nominal inner member
Hardness Rating: 28.0 rockwell c nominal outer race member
Inner Member Width: 0.3410 inches minimum and 0.3430 inches maximum
Material Document And Classification: 369a7951-7,02731 mfr ref single material response race liner
Material Document And Classification: fed-std 66 fed std single material response inner member
Material Document And Classification: fed-std 66 fed std single material response outer race member
Material: plastic tetrafluoroethylene race liner
Material: steel inner member
Material: steel outer race member
Outer Member Outside Diameter: 0.6557 inches minimum and 0.6562 inches maximum
Outer Member Width: 0.2450 inches minimum and 0.2550 inches maximum
Special Features: 12 deg self-alignment in either direction
Static Radial Load Rating: 7200 pounds
Style Designator: with insert and/or liner
Surface Treatment Document And Classification: 369a7951-7,02731 mfr ref single treatment response inner member
Surface Treatment: chromium inner member

Replaces

The NSN 3120-00-851-5704 is used in place of the following discontinued or alternate items:

NSN	Name	Date
3120-00-686-5933	No Name Available	10/01/1979
3120-00-904-6998	No Name Available	05/01/1977

Frequently Asked Questions

Find quick answers to common questions about bearing: KR4-CNB. Explore technical specifications, installation tips, maintenance guidelines, regulatory requirements, and troubleshooting advice.

What is the FSCG of the NSN 3120-00-851-5704?: The FSCG of the NSN 3120-00-851-5704 is 3120

Does the NSN 3120-00-851-5704 have a Schedule B code assigned?: Yes, the Schedule B code is 8482300040

Does NSN 3120-00-851-5704 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 3120-00-851-5704 contain precious materials?: Item does not contain precious metal.

Does NSN 3120-00-851-5704 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.