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657979 — BEARING,BALL,AIRFRAME

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

657979: BEARING,BALL,AIRFRAME.

The BEARING,BALL,AIRFRAME is a the manufacturer industrial component. Key specifications include material: RUBBER SYNTHETIC SEAL, bore_diameter: 1.5620 INCHES MINIMUM AND 1.5625 INCHES MAXIMUM IN, inner_ring_width: 0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN, outer_ring_width: 0.2450 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN, special_features: 0.0008 TO 0.0015 RADIAL PLAY, style_designator: SINGLE ROW INNER RING EXTENDED BOTH SIDES. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-391-2170, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
657979
NSN: 3110-01-391-2170
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 82577 — RAYTHEON COMPANY DBA RAYTHEON (USA)
SPECIFICATIONS
materialRUBBER SYNTHETIC SEAL
bore_diameter1.5620 INCHES MINIMUM AND 1.5625 INCHES MAXIMUM IN
seal_quantity2
inner_ring_width0.2760 INCHES MINIMUM AND 0.2810 INCHES MAXIMUM IN
outer_ring_width0.2450 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
special_features0.0008 TO 0.0015 RADIAL PLAY
style_designatorSINGLE ROW INNER RING EXTENDED BOTH SIDES
overall_outside_diameter1.9995 INCHES MINIMUM AND 2.0000 INCHES MAXIMUM IN
NSN3110-01-391-2170
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 657979 · OEM ⚠ VERIFY BEFORE ORDERING Cup and cone sold separately — verify you are ordering BOTH parts or the correct component. Always replace cup and cone together — mismatched wear = premature failure ✓ BROKER TIP Taper angle determines axial load capacity. Steeper angle = higher axial load rating. Timken series numbers indicate dimensions — cross-reference carefully PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
OUTER RING WIDTH: 0.2450 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: SINGLE ROW INNER RING EXTENDED BOTH SIDES
•
OVERALL OUTSIDE DIAMETER: 1.9995 INCHES MINIMUM AND 2.0000 INCHES MAXIMUM IN
•
SEAL QUANTITY: 2
•
BORE DIAMETER: 1.5620 INCHES MINIMUM AND 1.5625 INCHES MAXIMUM IN
•
MATERIAL: RUBBER SYNTHETIC SEAL
TECHNICAL CHARACTERISTICS
OUTER RING WIDTH0.2450 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
STYLE DESIGNATORSINGLE ROW INNER RING EXTENDED BOTH SIDES
OVERALL OUTSIDE DIAMETER1.9995 INCHES MINIMUM AND 2.0000 INCHES MAXIMUM IN
SPECIAL FEATURES0.0008 TO 0.0015 RADIAL PLAY
SEAL QUANTITY2
BORE DIAMETER1.5620 INCHES MINIMUM AND 1.5625 INCHES MAXIMUM IN
MATERIALRUBBER SYNTHETIC SEAL
MATERIALSTEEL COMP E52100 OUTER RING
MATERIALSTEEL COMP 440C BALL
MATERIALSTEEL COMP E52100 INNER RING
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES 1
WRI543005EEFD602FA3P815LY308K3Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 657979?
657979 is a BEARING,BALL,AIRFRAME.
What parts can replace 657979?
There is 1 known substitute for 657979: WRI543005EEFD602FA3P815LY308K3. Substitute compatibility should be verified for your specific system.
What is the NSN for 657979?
657979 is cataloged in the U.S. Government catalog under NSN 3110-01-391-2170. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.