TWF4S561

Comprehensive specifications and application details for: TWF4S561 Airframe Ball Bearing.

Summary

Explore detailed summary information for bearing: TWF4S561. Includes NSN, classification group, and identification codes to support sourcing, compliance, and accurate part tracking.

Part Number
TWF4S561
Federal Supply Classification
3110 Unmounted Antifriction Bearings
(NSN) National Stock Number
3110-00-978-1371
Item Name Code
00041
Federal Item Identification Guide
A044A0
Assigment Date
01/01/1962

A cylindrical item in which the inner or outer ring turns upon row(s) of hardened ball, bearing which roll on a raceway, thus minimizing friction. These items are characterized by their noncorrosive qualities, lightness of weight, inch dimensions rather than metric, inner rings generally projecting beyond the faces of the outer ring, or a very narrow width inner ring having an outside diameter slightly larger than the bore diameter. Designed primarily for use in aircraft assemblies, such as control systems and surfaces of aircraft. Excludes:bearing,ball,annular.

2.8122 inches minimum and 2.8125 inches maximum bore diameter, grease lubrication material, 0.3700 inches minimum and 0.3750 inches maximum inner ring width, mil-g-23827 mil spec single material response lubrication material document and classification, radial load direction

Datasheet

Below are the comprehensive technical specifications for bearing: 3110-00-978-1371 . Find dimensions, materials, tolerances, performance characteristics, etc.

Bore Diameter
2.8122 inches minimum and 2.8125 inches maximum
Inner Ring Width
0.3700 inches minimum and 0.3750 inches maximum
Load Direction
radial
Lubrication Material Document And Classification
mil-g-23827 mil spec single material response
Lubrication Material
grease
Outer Ring Width
0.3120 inches nominal
Overall Outside Diameter
3.4997 inches minimum and 3.5000 inches maximum
Material
steel ball
Material
steel inner ring
Material
steel outer ring
Material
steel shield
Shield Quantity
2
Special Features
inner ring radial runout 0.0005 in. also outer ring radial runout 0.0006 in. also integral shields are formed by extending the lands of the inner ring also radial clearance 0.0005 in. min. 0.0015 in. max also outer ring fractured at on point also 2 retaining rings on od of outer ring
Style Designator
single row inner ring extended both sides

Frequently Asked Questions

Find quick answers to common questions about bearing: TWF4S561. Explore technical specifications, installation tips, maintenance guidelines, regulatory requirements, and troubleshooting advice.

What is the FSCG of the NSN 3110-00-978-1371?
The FSCG of the NSN 3110-00-978-1371 is 3110
Does the NSN 3110-00-978-1371 have a Schedule B code assigned?
Yes, the Schedule B code is 8482105068
Does NSN 3110-00-978-1371 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 3110-00-978-1371 contain precious materials?
Precious metal content is unknown
Does NSN 3110-00-978-1371 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.
When the NSN 3110-00-978-1371 was assigned to the Federal Catalog?
It was assigned 63 years ago, on Mon, Jan 1, 1962

Price & Availability

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