Annular Ball Bearing

Model / MPN: 559391 | NSN: 3110-00-271-0208

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

3110-00-271-0208

Sold in multiples of

DEMIL

Bore Diameter

Between 1.2500 inches and 1.2505 inches

Overall Outside Diameter

Between 2.8340 inches and 2.8346 inches

Lubrication Material

Grease

Outer Ring Width

0.9375 inches

Inner Ring Width

Between 1.6830 inches and 1.6880 inches

Surface Finish

Ground

Seal Quantity

Bearing Seal Type

Labyrinth

Load Direction

Radial

Bore Shape

Straight

Internal Fit-up Designation

Standard

Features Provided

Snap ring-groove mounting and mounting groove

Lubrication Material

Grease

Lubrication Material Specification

Armva 781, fscm 77988 mfr ref single material response

Material

Steel ball

Material

Wool seal

Material

Steel inner ring

Material

Steel outer ring

Material

Steel retainer

Style Designator

Single row ball, not self-aligning, inner ring extends both sides, with setscrew in inner ring, grease groove and snap ring on outer ring

55939 Series Parts

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

Certified Quality Assurance

ISO 9001:2015 + AS9120B
Counterfeit Parts Prevention
100% Product Inspections
7 Year Record Retention
On Time Delivery
HAZMAT Certified
Worldwide Shipping

559391 Cross Reference

ER20
559391
ER2
ER20
ER20