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Technical Data Sheet
PartsTable / COMPONENT / M1203
M1203 ✓ 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, body_width: 1.000 INCHES NOMINAL IN, bore_shape: STRAIGHT, body_height: 0.750 INCHES NOMINAL IN, body_length: 1.000 INCHES NOMINAL IN, bore_diameter: 60.00 MILLIMETERS NOMINAL MM. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-5327, 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
M1203
NSN: 3110-00-156-5327
FSC: 3110
CAGE: 61208 — TWIN DISC, INCORPORATED DBA TWIN DISC MID-ATLANTIC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
body_width1.000 INCHES NOMINAL IN
bore_shapeSTRAIGHT
body_height0.750 INCHES NOMINAL IN
body_length1.000 INCHES NOMINAL IN
bore_diameter60.00 MILLIMETERS NOMINAL MM
overall_width1.4375 INCHES NOMINAL IN
inclosure_typeFULLY INCLOSED
load_directionANGULAR
surface_finishGROUND
mounting_methodFLANGE AND UNTHREADED HOLE(S) SINGLE GROUP
frequency_rating60.0 HERTZ NOMINAL SINGLE COMPONENT
NSN3110-00-156-5327
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: M1203 · 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
•
INTERNAL FIT-UP DESIGNATION: STANDARD
•
OVERALL OUTSIDE DIAMETER: 110.00 MILLIMETERS NOMINAL MM
•
DEPARTURE FROM CITED DESIGNATOR: AS MODIFIED BY EXTERNAL MOUNTING METHOD
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: LOADING GROOVE, NON-SEPARABLE
•
FEATURES PROVIDED: SNAP RING-GROOVE MOUNTING AND MOUNTING GROOVE
•
BORE SHAPE: STRAIGHT
TECHNICAL CHARACTERISTICS (FLIS)
INTERNAL FIT-UP DESIGNATIONSTANDARD
INTERNAL FIT-UP DESIGNATIONSTANDARD
OVERALL OUTSIDE DIAMETER110.00 MILLIMETERS NOMINAL MM
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY EXTERNAL MOUNTING METHOD
MATERIALSTEEL OVERALL
STYLE DESIGNATORLOADING GROOVE, NON-SEPARABLE
FEATURES PROVIDEDSNAP RING-GROOVE MOUNTING AND MOUNTING GROOVE
BORE SHAPESTRAIGHT
DEPARTURE FROM CITED DESIGNATORAS MODIFIED BY EXTERNAL MOUNTING METHOD
MATERIALSTEEL OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
45212X1AInterchangeable
interchangeable cross-reference
interchangeable
45212Interchangeable
interchangeable cross-reference
interchangeable
AN8508-6Interchangeable
interchangeable cross-reference
interchangeable
VF-12Interchangeable
interchangeable cross-reference
interchangeable
4245446-001Interchangeable
interchangeable cross-reference
interchangeable
M1203Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M1203?
M1203 is a BEARING,BALL,ANNULAR.
What parts can replace M1203?
There are 10 known substitutes for M1203: 45212X1A, 45212, AN8508-6 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M1203?
M1203 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-5327. 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