Annular Ball Bearing

Model / MPN: A3990/61757 | NSN: 3110-01-235-2874

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.

Product Details

NATO Stock Number

3110-01-235-2874

Sold in multiples of

DEMIL

Overall Width

0.2500 inches

Bore Diameter

4.4998 inches

Overall Outside Diameter

5.0003 inches

Surface Finish

Ground

Retainer Fabrication Method

Pressed

Load Direction

Radial

Bore Shape

Straight

Internal Fit-up Designation

Standard

Standard Tolerance Designation

Abec no.1

Functional Description

Combination of radial, trust and movement loading

Material

Copper alloy 260 retainer

Material

Steel comp e52100 ball

Material

Steel comp e52100 inner ring

Material

Steel comp e52100 outer ring

Material Specification

Astm a295 assn standard single material response ball or 66 federal standard single material response ball

Material Specification

Astm a295 assn standard single material response outer ring or 66 federal standard single material response outer ring

Material Specification

Astm a295 assn standard single material response inner ring or 66 federal standard single material response inner ring

Material Specification

Sae ca260 assn standard single material response retainer or qq-b-613 federal specification single material response retainer

Style Designator

40a 4 point ball contact, solid inner and outer rings, non-separable

A3990 Series Parts

Pricing and Availability

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ISO 9001:2015 + AS9120B
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A3990/61757 Cross Reference

NA045XPO
NA045XPO
ARS997