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Technical Data Sheet
PartsTable / COMPONENT / A40770-1
A40770-1 ✓ Verified by PartsTable
— · TAPERED BEARING
WHAT YOU NEED TO KNOW
Cup and cone sold separately — confirm both needed Timken series numbers indicate dimensions
Cup and cone NOT sold as set — verify order
PRODUCT OVERVIEW

The BEARING,BALL,ANNULAR is a the manufacturer industrial component. Key specifications include material: STEEL COMP 440C OVERALL, bore_shape: STRAIGHT, flange_width: 0.0300 INCHES MINIMUM AND 0.0310 INCHES MAXIMUM IN, bore_diameter: 0.1860 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN, load_direction: RADIAL, surface_finish: GROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-856-5603, 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
A40770-1
NSN: 3110-00-856-5603
FSC: 3110
CAGE: 42498 — DAR ELECTRONICS INC DBA NATIONAL RADIO CO (USA)
SPECIFICATIONS
materialSTEEL COMP 440C OVERALL
bore_shapeSTRAIGHT
flange_width0.0300 INCHES MINIMUM AND 0.0310 INCHES MAXIMUM IN
bore_diameter0.1860 INCHES MINIMUM AND 0.1875 INCHES MAXIMUM IN
load_directionRADIAL
surface_finishGROUND
shield_quantity2
inner_ring_width0.1561 INCHES MINIMUM AND 0.1562 INCHES MAXIMUM IN
outer_ring_width0.1249 INCHES MINIMUM AND 0.1250 INCHES MAXIMUM IN
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
internal_clearance0.0002 INCHES MINIMUM RADIAL AND 0.0005 INCHES MAXIMUM RADIAL IN
lubrication_materialOIL
NSN3110-00-856-5603
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: A40770-1 · 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
•
MATERIAL: STEEL COMP 440C OVERALL
•
OUTER RING OUTSIDE DIAMETER: 0.3735 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
•
FLANGE WIDTH: 0.0300 INCHES MINIMUM AND 0.0310 INCHES MAXIMUM IN
•
STANDARD TOLERANCE DESIGNATION: ABEC NO.7
•
FLANGE OUTSIDE DIAMETER: 0.4219 INCHES MINIMUM AND 0.4220 INCHES MAXIMUM IN
•
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATION: MIL-L-6085 MIL SPEC SINGLE MATERIAL RESPONSE
•
LUBRICATION MATERIAL: OIL
•
INTERNAL CLEARANCE: 0.0002 INCHES MINIMUM RADIAL AND 0.0005 INCHES MAXIMUM RADIAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL COMP 440C OVERALL
OUTER RING OUTSIDE DIAMETER0.3735 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
FLANGE WIDTH0.0300 INCHES MINIMUM AND 0.0310 INCHES MAXIMUM IN
STANDARD TOLERANCE DESIGNATIONABEC NO.7
FLANGE OUTSIDE DIAMETER0.4219 INCHES MINIMUM AND 0.4220 INCHES MAXIMUM IN
LUBRICATION MATERIAL DOCUMENT AND CLASSIFICATIONMIL-L-6085 MIL SPEC SINGLE MATERIAL RESPONSE
LUBRICATION MATERIALOIL
INTERNAL CLEARANCE0.0002 INCHES MINIMUM RADIAL AND 0.0005 INCHES MAXIMUM RADIAL IN
SHIELD QUANTITY2
RETAINER FABRICATION METHODPRESSED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
0S6316FCHHE3P2501Interchangeable
interchangeable cross-reference
interchangeable
SFR1665PPEEK25-7Interchangeable
interchangeable cross-reference
interchangeable
SFRW166SW3-011Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A40770-1?
A40770-1 is a BEARING,BALL,ANNULAR.
What parts can replace A40770-1?
There are 3 known substitutes for A40770-1: 0S6316FCHHE3P2501, SFR1665PPEEK25-7, SFRW166SW3-011. Substitute compatibility should be verified for your specific system.
What is the NSN for A40770-1?
A40770-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-856-5603. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026