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Technical Data Sheet
PartsTable / COMPONENT / GB66
GB66 ✓ 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,ROLLER,NEEDLE is a the manufacturer industrial component. Key specifications include bore_diameter: 0.3750 INCHES NOMINAL IN, overall_width: 0.3750 INCHES NOMINAL IN, alignment_type: RIGID, style_designator: NON-SEPARABLE, OPEN END, DRAWN SHELL, overall_outside_diameter: 0.5625 INCHES NOMINAL IN, standard_tolerance_designation: AFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-112-5879, 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
GB66
NSN: 3110-00-112-5879
FSC: 3110
CAGE: 60380 — TIMKEN AEROSPACE, INC DBA TORRINGTON PRODUCT (USA)
SPECIFICATIONS
bore_diameter0.3750 INCHES NOMINAL IN
overall_width0.3750 INCHES NOMINAL IN
alignment_typeRIGID
style_designatorNON-SEPARABLE, OPEN END, DRAWN SHELL
overall_outside_diameter0.5625 INCHES NOMINAL IN
standard_tolerance_designationAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
NSN3110-00-112-5879
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: GB66 · 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
•
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
•
BORE DIAMETER: 0.3750 INCHES NOMINAL IN
•
ALIGNMENT TYPE: RIGID
•
OVERALL OUTSIDE DIAMETER: 0.5625 INCHES NOMINAL IN
•
STYLE DESIGNATOR: NON-SEPARABLE, OPEN END, DRAWN SHELL
TECHNICAL CHARACTERISTICS (FLIS)
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
OVERALL WIDTH0.3750 INCHES NOMINAL IN
BORE DIAMETER0.3750 INCHES NOMINAL IN
ALIGNMENT TYPERIGID
OVERALL OUTSIDE DIAMETER0.5625 INCHES NOMINAL IN
STYLE DESIGNATORNON-SEPARABLE, OPEN END, DRAWN SHELL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
12HD45Interchangeable
interchangeable cross-reference
interchangeable
BN793Interchangeable
interchangeable cross-reference
interchangeable
121-0037Interchangeable
interchangeable cross-reference
interchangeable
BX59Interchangeable
interchangeable cross-reference
interchangeable
90500Interchangeable
interchangeable cross-reference
interchangeable
419366-17Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is GB66?
GB66 is a BEARING,ROLLER,NEEDLE.
What parts can replace GB66?
There are 9 known substitutes for GB66: 12HD45, BN793, 121-0037 and 6 more. Substitute compatibility should be verified for your specific system.
Is GB66 still available?
GB66 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026