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Technical Data Sheet
PartsTable / COMPONENT / B70163
B70163 ✓ 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 OVERALL, bore_shape: STRAIGHT, bore_diameter: 3.2982 INCHES MINIMUM AND 3.2990 INCHES MAXIMUM IN, load_direction: RADIAL, surface_finish: GROUND, inner_ring_width: 0.4450 INCHES MINIMUM AND 0.4490 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-157-2028, 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
B70163
NSN: 3110-00-157-2028
FSC: 3110
CAGE: 88551 — MCA RECORDS INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
bore_shapeSTRAIGHT
bore_diameter3.2982 INCHES MINIMUM AND 3.2990 INCHES MAXIMUM IN
load_directionRADIAL
surface_finishGROUND
inner_ring_width0.4450 INCHES MINIMUM AND 0.4490 INCHES MAXIMUM IN
outer_ring_width0.3440 INCHES NOMINAL IN
special_featuresINNER RING AND FLUSH SIDE OF OUTER RING CHAMFERED 0.0300 IN. TO 0.0400 IN. BY 45 DEG,SHOULDER SIDE O OUTER RING CHAMFERED 0.0200 IN. BY 45 DEG IN
style_designatorCOUNTERBORED OUTER RING, NON-SEPARABLE
overall_outside_diameter4.0442 INCHES MINIMUM AND 4.0450 INCHES MAXIMUM IN
internal_fit-up_designationSTANDARD
NSN3110-00-157-2028
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: B70163 · 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
•
BORE DIAMETER: 3.2982 INCHES MINIMUM AND 3.2990 INCHES MAXIMUM IN
•
OUTER RING WIDTH: 0.3440 INCHES NOMINAL IN
•
BORE SHAPE: STRAIGHT
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
STYLE DESIGNATOR: COUNTERBORED OUTER RING, NON-SEPARABLE
•
MATERIAL: STEEL OVERALL
•
OVERALL OUTSIDE DIAMETER: 4.0442 INCHES MINIMUM AND 4.0450 INCHES MAXIMUM IN
•
INNER RING WIDTH: 0.4450 INCHES MINIMUM AND 0.4490 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER3.2982 INCHES MINIMUM AND 3.2990 INCHES MAXIMUM IN
OUTER RING WIDTH0.3440 INCHES NOMINAL IN
BORE SHAPESTRAIGHT
INTERNAL FIT-UP DESIGNATIONSTANDARD
STYLE DESIGNATORCOUNTERBORED OUTER RING, NON-SEPARABLE
MATERIALSTEEL OVERALL
OVERALL OUTSIDE DIAMETER4.0442 INCHES MINIMUM AND 4.0450 INCHES MAXIMUM IN
INNER RING WIDTH0.4450 INCHES MINIMUM AND 0.4490 INCHES MAXIMUM IN
SPECIAL FEATURESINNER RING AND FLUSH SIDE OF OUTER RING CHAMFERED 0.0300 IN. TO 0.0400 IN. BY 45 DEG,SHOULDER SIDE O OUTER RING CHAMFERED 0.0200 IN. BY 45 DEG IN
LOAD DIRECTIONRADIAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 16
100644Interchangeable
interchangeable cross-reference
interchangeable
13658Interchangeable
interchangeable cross-reference
interchangeable
920012-63Interchangeable
interchangeable cross-reference
interchangeable
10291Interchangeable
interchangeable cross-reference
interchangeable
EYZP831Interchangeable
interchangeable cross-reference
interchangeable
704202-109Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B70163?
B70163 is a BEARING,BALL,ANNULAR.
What parts can replace B70163?
There are 16 known substitutes for B70163: 100644, 13658, 920012-63 and 13 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B70163?
B70163 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-157-2028. 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