TWF4S561

View detailed technical data, stock status, and sourcing information for: TWF4S561
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Federal Supply Group

Bearings

Federal Supply Classification

3110 Unmounted Antifriction Bearings

National Stock Number

3110-00-978-1371

Item Name Code

00041

Assigment Date

01/01/1962 (64 years ago)

0.3700 inches minimum and 0.3750 inches maximum inner ring width, 3.4997 inches minimum and 3.5000 inches maximum overall outside diameter, 0.3120 inches nominal outer ring width, 2 shield quantity, 2.8122 inches minimum and 2.8125 inches maximum bore diameter

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Bore Diameter: 2.8122 inches minimum and 2.8125 inches maximum
Overall Outside Diameter: 3.4997 inches minimum and 3.5000 inches maximum
Outer Ring Width: 0.3120 inches nominal
Inner Ring Width: 0.3700 inches minimum and 0.3750 inches maximum
Shield Quantity: 2
Load Direction: radial
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
Lubrication Material: grease
Lubrication Material Document And Classification: mil-g-23827 mil spec single material response
Material: steel ball
Material: steel inner ring
Material: steel outer ring
Material: steel shield
Style Designator: single row inner ring extended both sides

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
203-004-0001	Airframe Ball Bearing
TWF45-56-1	Airframe Ball Bearing
TWF4S561	Airframe Ball Bearing

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

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 64 years ago, on Mon, Jan 1, 1962