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MS27645-4AG — BEARING,BALL,AIRFRAME

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

MS27645-4AG: BEARING,BALL,AIRFRAME.

The BEARING,BALL,AIRFRAME is a the manufacturer industrial component. Key specifications include bore_diameter: 0.2500 INCHES NOMINAL0.2500 INCHES NOMINAL IN, seal_quantity: 22, alignment_type: SELF-ALIGNINGSELF-ALIGNING, load_direction: RADIALRADIAL, inner_ring_width: 0.2810 INCHES NOMINAL0.2810 INCHES NOMINAL IN, outer_ring_width: 0.2190 INCHES NOMINAL0.2190 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 3110-01-356-8991, 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
MS27645-4AG
NSN: 3110-01-356-8991
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
bore_diameter0.2500 INCHES NOMINAL0.2500 INCHES NOMINAL IN
seal_quantity22
alignment_typeSELF-ALIGNINGSELF-ALIGNING
load_directionRADIALRADIAL
inner_ring_width0.2810 INCHES NOMINAL0.2810 INCHES NOMINAL IN
outer_ring_width0.2190 INCHES NOMINAL0.2190 INCHES NOMINAL IN
style_designatorSINGLE ROW SELF ALIGNING SINGLE ROW INNER RING EXTENDED BOTH SIDESSINGLE ROW SELF ALIGNING SINGLE ROW INNER RING EXTENDED BOTH SIDES
bearing_seal_typeCONTACTCONTACT
lubrication_materialGREASEGREASE
self-alignment_locationINTERNALINTERNAL
overall_outside_diameter0.7500 INCHES NOMINAL0.7500 INCHES NOMINAL IN
standard_tolerance_designationAFBMA STD TOLERANCE FOR AIRFRAME BALL BEARINGSAFBMA STD TOLERANCE FOR AIRFRAME BALL BEARINGS
NSN3110-01-356-8991
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: MS27645-4AG · 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
•
BEARING SEAL TYPE: CONTACTCONTACT
•
LUBRICATION MATERIAL: GREASEGREASE
•
OUTER RING WIDTH: 0.2190 INCHES NOMINAL0.2190 INCHES NOMINAL IN
•
STYLE DESIGNATOR: SINGLE ROW SELF ALIGNING SINGLE ROW INNER RING EXTENDED BOTH SIDESSINGLE ROW SELF ALIGNING SINGLE ROW INNER RING EXTENDED BOTH SIDES
•
OVERALL OUTSIDE DIAMETER: 0.7500 INCHES NOMINAL0.7500 INCHES NOMINAL IN
•
LOAD DIRECTION: RADIALRADIAL
•
ALIGNMENT TYPE: SELF-ALIGNINGSELF-ALIGNING
TECHNICAL CHARACTERISTICS
BEARING SEAL TYPECONTACTCONTACT
LUBRICATION MATERIALGREASEGREASE
OUTER RING WIDTH0.2190 INCHES NOMINAL0.2190 INCHES NOMINAL IN
STYLE DESIGNATORSINGLE ROW SELF ALIGNING SINGLE ROW INNER RING EXTENDED BOTH SIDESSINGLE ROW SELF ALIGNING SINGLE ROW INNER RING EXTENDED BOTH SIDES
OVERALL OUTSIDE DIAMETER0.7500 INCHES NOMINAL0.7500 INCHES NOMINAL IN
LOAD DIRECTIONRADIALRADIAL
ALIGNMENT TYPESELF-ALIGNINGSELF-ALIGNING
SPECIAL FEATURES80 PCT. FULL OF MIL-G-23827,AXIAL PLAY 0.025 IN. MAX,HEAT TREAT RINGS AND BALLS TO ROCKWELL C 60 TO 66 AND STABLIZED FOR OPERATION AT 250 DEG.F,8 DEG SELF-ALIGNING IN EITHER DIRECTION80 PCT. FULL OF MIL-G-23827,AXIAL PLAY 0.025 IN. MAX,HEAT TREAT RINGS AND BALLS TO ROCKWELL C 60 TO 66 AND STABLIZED FOR OPERATION AT 250 DEG.F,8 DEG SELF-ALIGNING IN EITHER DIRECTION IN
SEAL QUANTITY22
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR AIRFRAME BALL BEARINGSAFBMA STD TOLERANCE FOR AIRFRAME BALL BEARINGS
SUBSTITUTES & CROSS-REFERENCES 2
AS27645Reference document
Same NSN cross-reference
Reference document — Secondary reference
AS27645-4AGReference document
Same NSN cross-reference
Reference document — Design control — primary reference
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 MS27645-4AG?
MS27645-4AG is a BEARING,BALL,AIRFRAME.
What parts can replace MS27645-4AG?
There are 2 known substitutes for MS27645-4AG: AS27645, AS27645-4AG. Substitute compatibility should be verified for your specific system.
What is the NSN for MS27645-4AG?
MS27645-4AG is cataloged in the U.S. Government catalog under NSN 3110-01-356-8991. This indicates validated use in U.S. government and defense supply chains.
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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.