Model: MIL-B-17931

Annular Ball Bearing

Properties:

Overall Width

Between 1.8484 inches and 1.8504 inches

Bore Diameter

Between 3.9367 inches and 3.9370 inches

Overall Outside Diameter

Between 8.4643 inches and 8.4646 inches

Lubrication Material

Grease

Surface Finish

Ground

Retainer Fabrication Method

Pressed

Shield Quantity

Load Direction

Radial

Bore Shape

Straight

Internal Fit-up Designation

Tight

Internal Clearance

0.0009 inches radial and 0.0014 inches radial

Criticality Code Justification

Zzzw

Lubrication Material Specification

Mil-g-18709 military specification single material response

Material

Steel

Style Designator

Non-loading groove, non-separable

Nondefinitive Specification/std Data

111 type and 2 class

Departure From Cited Document

Quiet operation tested for submarine use

NSN

3110-00-987-3747

Part Number

MIL-B-17931

Description

Bearing,ball,annular

CAGE

81349

A cylindrical device in which the inner or outer ring turns upon a single or double row of hardened balls which roll easily between the two rings, thus minimizing friction. For items with faces specially ground for duplex mounting see bearing, ball, duplex. Excludes bearing, ball, airframe.

Part MIL-B-17931 NSN 3110-00-987-3747

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

00014

FIIG:

A044A0

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

114820

UFC:

58860

LTL:

77.5

LCL:

77.5

WCC:

742

TCC:

SHC:

ACC:

Trailers/Vehicles

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Schedule B and Export

Schedule B: 8482105028
SITC: 74610
End Use: Industrial machines, other
NAICS: 332991
USDA: 1

Freight Class: Angular contact ball bearings, nesoi