PartsTable
Technical Data Sheet
B-3138MD4 ✓ 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

CARTRIDGE,AIRCRAFT FIRE EXTINGUI. Key specifications include material: STEEL COMP E51100 OR STEEL COMP E52100 OVERALL, alignment_type: RIGID, overall_height: 18.00 MILLIMETERS NOMINAL MM, surface_finish: GROUND, style_designator: GROOVED RACE SURFACE, bore_smallest_diameter: 50.00 MILLIMETERS NOMINAL MM. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-156-1883, 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
B-3138MD4
NSN: 3110-00-156-1883
FSC: 3110
CAGE: 14541 — COOPER MACHINERY SERVICES LLC (USA)
SPECIFICATIONS
materialSTEEL COMP E51100 OR STEEL COMP E52100 OVERALL
alignment_typeRIGID
overall_height18.00 MILLIMETERS NOMINAL MM
surface_finishGROUND
style_designatorGROOVED RACE SURFACE
bore_smallest_diameter50.00 MILLIMETERS NOMINAL MM
overall_outside_diameter74.00 MILLIMETERS NOMINAL MM
standard_tolerance_designationAFBMA STD TOLERANCE FOR THRUST BEARINGS
material_document_and_classification66 FED STD ALL MATERIAL RESPONSES OVERALL
thrust_directional_capability_designationSINGLE
NSN3110-00-156-1883
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: B-3138MD4 · 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
OVERALL OUTSIDE DIAMETER: 74.00 MILLIMETERS NOMINAL MM
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
STYLE DESIGNATOR: GROOVED RACE SURFACE
SURFACE FINISH: GROUND
BORE SMALLEST DIAMETER: 50.00 MILLIMETERS NOMINAL MM
THRUST DIRECTIONAL CAPABILITY DESIGNATION: SINGLE
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR THRUST BEARINGS
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL OUTSIDE DIAMETER74.00 MILLIMETERS NOMINAL MM
OVERALL HEIGHT18.00 MILLIMETERS NOMINAL MM
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
STYLE DESIGNATORGROOVED RACE SURFACE
SURFACE FINISHGROUND
BORE SMALLEST DIAMETER50.00 MILLIMETERS NOMINAL MM
THRUST DIRECTIONAL CAPABILITY DESIGNATIONSINGLE
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR THRUST BEARINGS
ALIGNMENT TYPERIGID
MATERIALSTEEL COMP E51100 OR STEEL COMP E52100 OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
2910Interchangeable
interchangeable cross-reference
interchangeable
2115Interchangeable
interchangeable cross-reference
interchangeable
3148450-9Interchangeable
interchangeable cross-reference
interchangeable
E241298-2Interchangeable
interchangeable cross-reference
interchangeable
FFH5-100Interchangeable
interchangeable cross-reference
interchangeable
3395Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B-3138MD4?
B-3138MD4 is a CARTRIDGE,AIRCRAFT FIRE EXTINGUI.
What parts can replace B-3138MD4?
There are 23 known substitutes for B-3138MD4: 2910, 2115, 3148450-9 and 20 more. Substitute compatibility should be verified for your specific system.
Is B-3138MD4 still available?
B-3138MD4 is currently cancelled.
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