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GB520ES30 — BEARING,PLAIN,SELF-ALIGNING

✓ Government record, cited
— · BALL BEARING
PRODUCT OVERVIEW

GB520ES30: BEARING,PLAIN,SELF-ALIGNING.

The BEARING,PLAIN,SELF-ALIGNING is a the manufacturer industrial component. Key specifications include material: STEEL COMP 630 INNER MEMBER, bore_diameter: 1.8745 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN, inner_member_width: 1.4980 INCHES MINIMUM AND 1.5000 INCHES MAXIMUM IN, outer_member_width: 1.0660 INCHES MINIMUM AND 1.0760 INCHES MAXIMUM IN, static_radial_load_rating: 184500 POUNDS LBS, outer_member_outside_diameter: 2.7807 INCHES MINIMUM AND 2.7812 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 3120-01-258-4697, 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
GB520ES30
NSN: 3120-01-258-4697
FSC: 3120 — Bearings, Plain, Unmounted
CAGE: 09455 — RBC TRANSPORT DYNAMICS CORP DIV RBC TRANSPORT DYNAMICS (USA)
SPECIFICATIONS
materialSTEEL COMP 630 INNER MEMBER
bore_diameter1.8745 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN
inner_member_width1.4980 INCHES MINIMUM AND 1.5000 INCHES MAXIMUM IN
outer_member_width1.0660 INCHES MINIMUM AND 1.0760 INCHES MAXIMUM IN
static_radial_load_rating184500 POUNDS LBS
outer_member_outside_diameter2.7807 INCHES MINIMUM AND 2.7812 INCHES MAXIMUM IN
NSN3120-01-258-4697
COMPONENT DIAGRAM
BALL BEARING — SEAL TYPE DETERMINES MAINTENANCE OD: — · BORE: — · WIDTH: — SEAL: Open · PN: GB520ES30 · 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
•
INNER MEMBER WIDTH: 1.4980 INCHES MINIMUM AND 1.5000 INCHES MAXIMUM IN
•
OUTER MEMBER WIDTH: 1.0660 INCHES MINIMUM AND 1.0760 INCHES MAXIMUM IN
•
STATIC RADIAL LOAD RATING: 184500 POUNDS LBS
•
BORE DIAMETER: 1.8745 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 630 OUTER RACE MEMBER
•
OUTER MEMBER OUTSIDE DIAMETER: 2.7807 INCHES MINIMUM AND 2.7812 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS
INNER MEMBER WIDTH1.4980 INCHES MINIMUM AND 1.5000 INCHES MAXIMUM IN
OUTER MEMBER WIDTH1.0660 INCHES MINIMUM AND 1.0760 INCHES MAXIMUM IN
STATIC RADIAL LOAD RATING184500 POUNDS LBS
BORE DIAMETER1.8745 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN
MATERIALSTEEL COMP 630 OUTER RACE MEMBER
MATERIALSTEEL COMP 630 INNER MEMBER
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE AND PLASTIC POLYAMIDE NYLON AND PLASTIC PHENOLIC RACE LINER
OUTER MEMBER OUTSIDE DIAMETER2.7807 INCHES MINIMUM AND 2.7812 INCHES MAXIMUM IN
OTHER ITEMS IN FSC 3120 — Bearings, Plain, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3120-00-001-1288 3120-00-001-1835 3120-00-001-1838 3120-00-001-1928 3120-00-001-1934 3120-00-001-3933 3120-00-001-3937 3120-00-001-3938
SUBSTITUTES & CROSS-REFERENCES 4
KSC122600P-6Reference document
Same NSN cross-reference
Reference document — Secondary reference
03-826-30E-003Reference document
Same NSN cross-reference
Reference document — Secondary reference
ADB30-302Reference document
Same NSN cross-reference
Reference document — Secondary reference
HSP30TL109Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is GB520ES30?
GB520ES30 is a BEARING,PLAIN,SELF-ALIGNING.
What parts can replace GB520ES30?
There are 4 known substitutes for GB520ES30: KSC122600P-6, 03-826-30E-003, ADB30-302 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for GB520ES30?
GB520ES30 is cataloged in the U.S. Government catalog under NSN 3120-01-258-4697. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.