PartsTable
Technical Data Sheet
B138 ✓ 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: 0.2497 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN, overall_width: 0.1910 INCHES MINIMUM AND 0.1960 INCHES MAXIMUM IN, alignment_type: RIGID, special_features: MATERIAL, 52100 CHROME STEEL;SHIELDED,SINGLE ROW,FLANGED, style_designator: NON-LOADING GROOVE, NON-SEPARABLE, end_item_identification: W.S. DARLEY AND CO.

LMD-PTO PUMP. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-227-2716, 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
B138
NSN: 3110-00-227-2716
FSC: 3110
CAGE: 60380 — TIMKEN AEROSPACE, INC DBA TORRINGTON PRODUCT (USA)
SPECIFICATIONS
bore_diameter0.2497 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM IN
overall_width0.1910 INCHES MINIMUM AND 0.1960 INCHES MAXIMUM IN
alignment_typeRIGID
special_featuresMATERIAL, 52100 CHROME STEEL;SHIELDED,SINGLE ROW,FLANGED
style_designatorNON-LOADING GROOVE, NON-SEPARABLE
end_item_identificationW.S. DARLEY AND CO. LMD-PTO PUMP
media_for_which_designedWATER, FRESH SINGLE RESPONSE
overall_outside_diameter0.6880 INCHES MINIMUM AND 0.6950 INCHES MAXIMUM IN
standard_tolerance_designationABEC NO.1
general_characteristics_item_description1.000 HEX BRASS; 1.875 IN. LG IN
lubrication_material_document_and_classificationMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
NSN3110-00-227-2716
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: B138 · 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: 1.0625 INCHES NOMINAL IN
STYLE DESIGNATOR: NON-SEPARABLE, OPEN END, DRAWN SHELL
STANDARD TOLERANCE DESIGNATION: AFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
BORE DIAMETER: 0.8125 INCHES NOMINAL IN
ALIGNMENT TYPE: RIGID
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL OUTSIDE DIAMETER1.0625 INCHES NOMINAL IN
STYLE DESIGNATORNON-SEPARABLE, OPEN END, DRAWN SHELL
STANDARD TOLERANCE DESIGNATIONAFBMA STD TOLERANCE FOR INDUSTRIAL NEEDLE BEARINGS
OVERALL WIDTH0.5000 INCHES NOMINAL IN
BORE DIAMETER0.8125 INCHES NOMINAL IN
ALIGNMENT TYPERIGID
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
0604387Interchangeable
interchangeable cross-reference
interchangeable
43312Interchangeable
interchangeable cross-reference
interchangeable
9A43312Interchangeable
interchangeable cross-reference
interchangeable
B-138-OHInterchangeable
interchangeable cross-reference
interchangeable
3110009021659Interchangeable
interchangeable cross-reference
interchangeable
7365074Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B138?
B138 is a BEARING,ROLLER,NEEDLE.
What parts can replace B138?
There are 14 known substitutes for B138: 0604387, 43312, 9A43312 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B138?
B138 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3110-00-227-2716. This indicates validated use in U.S. government and defense supply chains.
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