T557

View detailed technical data, stock status, and sourcing information for: T557
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Federal Supply Group

Bearings

Federal Supply Classification

3110 Unmounted Antifriction Bearings

National Stock Number

3110-01-102-1923

Item Name Code

00014

Assigment Date

10/14/1980 (45 years ago)

A tubular shaped item with or without flange(s) designed to reduce friction and carry a kinetic load on the surface(s) parallel to the axis of the bore. It must have a visible or detectable means of lubrication or be self-lubricated. The over all length must exceed 25 percent of the outside diameter or the shortest distance between peripheral flats of the body, except for straight tubular (without flange or shoulder) items having a bearing surface(s) parallel to the axis of the bore only. Includes items which are divided into two or more segments which include 180 degrees (3.141 radians) or less of the bearing periphery. See also bushing, sleeve; spacer, sleeve; and washer (as modified). Excludes:pin, hollow.

0.2700 inches minimum and 0.2720 inches maximum overall width, machined retainer fabrication method, 2.9997 inches minimum and 3.0000 inches maximum overall outside diameter, 2.4997 inches minimum and 2.5000 inches maximum bore diameter, ground surface finish

Product Characteristics

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

Overall Width: 0.2700 inches minimum and 0.2720 inches maximum
Bore Diameter: 2.4997 inches minimum and 2.5000 inches maximum
Overall Outside Diameter: 2.9997 inches minimum and 3.0000 inches maximum
Surface Finish: ground
Retainer Fabrication Method: machined
Shield Quantity: 2
Load Direction: radial
Bore Shape: straight
Internal Clearance: 0.0012 inches minimum radial and 0.0016 inches maximum radial
Standard Tolerance Designation: abec no. 5t
Special Features: 7 to 8 drops of specified lubricant from a no. 27 needle
Lubrication Material: oil
Lubrication Material Document And Classification: mil-l-6085 mil spec single material response
Style Designator: non-loading groove, non-separable

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
3TKLS40-48-CIREF	Annular Ball Bearing
7890770-001	Annular Ball Bearing
SR4880SSZAX2REF	Annular Ball Bearing
T557	Annular Ball Bearing

FAQs

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

What is the FSCG of the NSN 3110-01-102-1923?

The FSCG of the NSN 3110-01-102-1923 is 3110

Does the NSN 3110-01-102-1923 have a Schedule B code assigned?

Yes, the Schedule B code is 8482105028

Does NSN 3110-01-102-1923 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 3110-01-102-1923 contain precious materials?

Precious metal content is unknown

Does NSN 3110-01-102-1923 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 3110-01-102-1923 was assigned to the Federal Catalog?

It was assigned 45 years ago, on Tue, Oct 14, 1980