Airframe Ball Bearing

NSN: 3110-01-251-0029 | Model: MIL-B-7949

A cylindrical item in which the inner or outer ring turns upon ro (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.

NSN Properties and Flags

NATO Stock Number

3110-01-251-0029

DEMIL

Bore Diameter

Between 2.3120 inches and 2.3130 inches

Overall Outside Diameter

Between 3.0615 inches and 3.0625 inches

Lubrication Material

Lubricant

Outer Ring Width

Between 0.3700 inches and 0.3750 inches

Inner Ring Width

Between 0.4325 inches and 0.4375 inches

Retainer Fabrication Method

Pressed

Seal Quantity

Bearing Seal Type

Contact

Load Direction

Radial

Internal Fit-up Designation

Standard

Features Provided

Extra light duty series

Standard Tolerance Designation

Afbma standard tolerance for airframe ball bearings

Functional Description

Radial torque tube type control

Lubrication Material Specification

E8081 mfr ref single material response

Material

Steel comp e52100 retainer

Material Specification

Ams 3652 assn standard single material response seal or ams 3666 assn standard single material response seal

Surface Treatment

Cadmium all external/exposed metal surfaces

Surface Treatment Specification

Qq-p-416, type 1, class 2 federal specification single treatment response all external/exposed metal surfaces

Style Designator

Single row inner ring extended both sides

Specification Data

81349-mil-b-7949 government specification

Departure From Cited Document

As modified by lubrication

Pricing and Availability

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ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
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HAZMAT Certified
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NSN 3110-01-251-0029 Datasheet

Supply Class (FSC):

Unmounted Antifriction Bearings

Cross Reference:

MIL-B-7949
KP37BE8081
KP37BE8081

Cage Codes:

Military Specifications (CAGE 81349)
Industrial Tectonics Bearings (CAGE 06144)
Timken Company, The (CAGE 21335)

Schedule B & Trade:

Schedule B: 8482105068 (NAICS 332991)

Ball bearings, nesoi
SITC: 74610

Ball bearings
End Use: 21180

Industrial machines, other

Identification:

HMIC

N - Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

PMIC

U - Precious metal content is unknown

CRITL

- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Questions & Answers:
What are the historical prices recorded for this stock number?
No pre-dated pricing for this NSN could be found.
Does NSN 3110-01-251-0029 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Canada
What is the NIIN of NSN 3110-01-251-0029?
012510029 or 01-251-0029
Does NSN 3110-01-251-0029 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 3110-01-251-0029?
No solicitations for this NSN.
When was this national stock number assigned to the federal catalog?
Mar 11, 1987