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20970-1 — Technical Data Sheet

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LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD · 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 LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD industrial component. Key specifications include MATERIAL: STEEL INNER RING, BORE SHAPE: STRAIGHT, BORE DIAMETER: 0.2500 INCHES NOMINAL IN, OVERALL WIDTH: 0.1970 INCHES NOMINAL 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 3110-00-155-9618, 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
20970-1
NSN: 3110-00-155-9618
FSC: 3110
CAGE: 56232 — LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD (USA)
SPECIFICATIONS
MATERIALSTEEL INNER RING
BORE SHAPESTRAIGHT
BORE DIAMETER0.2500 INCHES NOMINAL IN
OVERALL WIDTH0.1970 INCHES NOMINAL IN
LOAD DIRECTIONRADIAL
SURFACE FINISHGROUND
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
OVERALL OUTSIDE DIAMETER0.6250 INCHES NOMINAL IN
INTERNAL FIT-UP DESIGNATIONSTANDARD
STANDARD TOLERANCE DESIGNATIONABEC NO.1
NSN3110-00-155-9618
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 20970-1 · LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD ⚠ 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 SHAPE: STRAIGHT
•
MATERIAL: STEEL BALL
•
STYLE DESIGNATOR: NON-LOADING GROOVE, NON-SEPARABLE
•
BORE DIAMETER: 0.2500 INCHES NOMINAL IN
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
LOAD DIRECTION: RADIAL
•
OVERALL OUTSIDE DIAMETER: 0.6250 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
BORE SHAPESTRAIGHT
MATERIALSTEEL BALL
STYLE DESIGNATORNON-LOADING GROOVE, NON-SEPARABLE
MATERIALSTEEL OUTER RING
BORE DIAMETER0.2500 INCHES NOMINAL IN
INTERNAL FIT-UP DESIGNATIONSTANDARD
LOAD DIRECTIONRADIAL
OVERALL OUTSIDE DIAMETER0.6250 INCHES NOMINAL IN
OVERALL WIDTH0.1970 INCHES NOMINAL IN
MATERIALSTEEL INNER RING
VERIFIED SUBSTITUTES & CROSS-REFERENCES 31
JT9312CInterchangeable
interchangeable cross-reference
interchangeable
106516Interchangeable
interchangeable cross-reference
interchangeable
RDCL1525-1Interchangeable
interchangeable cross-reference
interchangeable
7771940P330Interchangeable
interchangeable cross-reference
interchangeable
JD1N056S254UAInterchangeable
interchangeable cross-reference
interchangeable
173260Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20970-1?
20970-1 is a BEARING,BALL,ANNULAR manufactured by LOCKHEED MARTIN CORPORATION DIV RMS - MITCHEL FIELD.
What parts can replace 20970-1?
There are 31 known substitutes for 20970-1: JT9312C, 106516, RDCL1525-1 and 28 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20970-1?
20970-1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-155-9618. 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: September 2026