PartsTable
Technical Data Sheet
MS21231-6 ✓ Verified by PartsTable
· BALL BEARING
WHAT YOU NEED TO KNOW
2RS = sealed for life, ZZ = shielded re-greaseable ABEC grade: higher = tighter tolerance
ABEC-1 standard, ABEC-7+ for precision spindles
PRODUCT OVERVIEW

The BEARING,PLAIN,SELF-ALIGNING is a the manufacturer industrial component. Key specifications include material: PLASTIC POLYTETRAFLUOROETHYLENE RACE LINER, bore_diameter: 0.3745 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN, hardness_rating: 28.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM OUTER RACE MEMBER, style_designator: WITH INSERT AND/OR LINER, inner_member_width: 0.4980 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN, outer_member_width: 0.4010 INCHES MINIMUM AND 0.4110 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3120-01-041-6462, 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
MS21231-6
NSN: 3120-01-041-6462
FSC: 3120
CAGE: 96906 — MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
materialPLASTIC POLYTETRAFLUOROETHYLENE RACE LINER
bore_diameter0.3745 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
hardness_rating28.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM OUTER RACE MEMBER
style_designatorWITH INSERT AND/OR LINER
inner_member_width0.4980 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN
outer_member_width0.4010 INCHES MINIMUM AND 0.4110 INCHES MAXIMUM IN
static_radial_load_rating13700 POUNDS LBS
outer_member_outside_diameter0.8120 INCHES MINIMUM AND 0.8125 INCHES MAXIMUM IN
NSN3120-01-041-6462
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: MS21231-6 · OEM ⚠ VERIFY BEFORE ORDERING ABEC grade: higher = tighter tolerance = higher cost. ABEC-1 is standard, ABEC-7+ for precision spindles. Open, shielded (ZZ), and sealed (2RS) versions have different max RPM ratings ✓ BROKER TIP 2RS = sealed for life (no maintenance). ZZ = shielded, re-greaseable. Open = must lubricate on install. Common interchange: 6205-2RS = 6205-2RSR = 6205-DDU (same bearing, different suffix) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
BORE DIAMETER: 0.3745 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
HARDNESS RATING: 28.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM OUTER RACE MEMBER
STYLE DESIGNATOR: WITH INSERT AND/OR LINER
MATERIAL: STEEL COMP 440C INNER MEMBER
OUTER MEMBER OUTSIDE DIAMETER: 0.8120 INCHES MINIMUM AND 0.8125 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
BORE DIAMETER0.3745 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
HARDNESS RATING28.0 ROCKWELL C MINIMUM AND 37.0 ROCKWELL C MAXIMUM OUTER RACE MEMBER
STYLE DESIGNATORWITH INSERT AND/OR LINER
MATERIALSTEEL COMP 440C INNER MEMBER
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE RACE LINER
HARDNESS RATING55.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM INNER MEMBER
OUTER MEMBER OUTSIDE DIAMETER0.8120 INCHES MINIMUM AND 0.8125 INCHES MAXIMUM IN
MATERIALSTEEL COMP 630 OUTER RACE MEMBER
STATIC RADIAL LOAD RATING13700 POUNDS LBS
OUTER MEMBER WIDTH0.4010 INCHES MINIMUM AND 0.4110 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 26
KR4-CWBInterchangeable
interchangeable cross-reference
interchangeable
MS21231-4Interchangeable
interchangeable cross-reference
interchangeable
AS14102Interchangeable
interchangeable cross-reference
interchangeable
KR-7CWBInterchangeable
interchangeable cross-reference
interchangeable
MS14102-7Interchangeable
interchangeable cross-reference
interchangeable
3120PL0685683Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS21231-6?
MS21231-6 is a BEARING,PLAIN,SELF-ALIGNING.
What parts can replace MS21231-6?
There are 26 known substitutes for MS21231-6: KR4-CWB, MS21231-4, AS14102 and 23 more. Substitute compatibility should be verified for your specific system.
Is MS21231-6 still available?
MS21231-6 is currently cancelled.
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