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438-432D — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

438-432D: BEARING,ROLLER,TAPERED.

The BEARING,ROLLER,TAPERED is a the manufacturer tape media or drive component used in enterprise backup, archival, and disaster recovery environments. Key specifications include material: STEEL COMP E52100 SEPARATOR SLUG, cup_width: 2.0000 INCHES NOMINAL IN, bore_diameter: 1.7500 INCHES MINIMUM AND 1.7505 INCHES MAXIMUM IN, overall_width: 2.4376 INCHES MINIMUM AND 2.4536 INCHES MAXIMUM IN, standout_width: 0.2188 INCHES NOMINAL IN, special_features: WITH CONE SPACER,OIL HOLE AND GROOVE IN CUP,BENCH LATERAL 0.0040 IN. IN.

This part is cataloged in the U.S. Government catalog under NSN 3110-01-006-9118, 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
438-432D
NSN: 3110-01-006-9118
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 60038 — THE TIMKEN CORPORATION (USA)
SPECIFICATIONS
materialSTEEL COMP E52100 SEPARATOR SLUG
cup_width2.0000 INCHES NOMINAL IN
bore_diameter1.7500 INCHES MINIMUM AND 1.7505 INCHES MAXIMUM IN
overall_width2.4376 INCHES MINIMUM AND 2.4536 INCHES MAXIMUM IN
standout_width0.2188 INCHES NOMINAL IN
special_featuresWITH CONE SPACER,OIL HOLE AND GROOVE IN CUP,BENCH LATERAL 0.0040 IN. IN
style_designatorSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES
cone_corner_radius0.1400 INCHES NOMINAL IN
backface_corner_radius0.0300 INCHES NOMINAL IN
overall_outside_diameter3.7500 INCHES MINIMUM AND 3.7510 INCHES MAXIMUM IN
retainer_fabrication_methodPRESSED
standard_tolerance_designationAFBMA CLASS 2
NSN3110-01-006-9118
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 438-432D · 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
•
RETAINER FABRICATION METHOD: PRESSED
•
CUP WIDTH: 2.0000 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, DOUBLE CUP, SINGLE CONES
•
OVERALL OUTSIDE DIAMETER: 3.7500 INCHES MINIMUM AND 3.7510 INCHES MAXIMUM IN
•
BACKFACE CORNER RADIUS: 0.0300 INCHES NOMINAL IN
•
CONE CORNER RADIUS: 0.1400 INCHES NOMINAL IN
•
STANDOUT WIDTH: 0.2188 INCHES NOMINAL IN
TYPICAL APPLICATIONS
  • Long-term data archival and compliance retention
  • Offsite backup and disaster recovery
  • Air-gapped ransomware protection
  • Cold storage tier for infrequently accessed data
TECHNICAL CHARACTERISTICS
RETAINER FABRICATION METHODPRESSED
CUP WIDTH2.0000 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, DOUBLE CUP, SINGLE CONES
OVERALL WIDTH2.4376 INCHES MINIMUM AND 2.4536 INCHES MAXIMUM IN
OVERALL OUTSIDE DIAMETER3.7500 INCHES MINIMUM AND 3.7510 INCHES MAXIMUM IN
BACKFACE CORNER RADIUS0.0300 INCHES NOMINAL IN
CONE CORNER RADIUS0.1400 INCHES NOMINAL IN
STANDOUT WIDTH0.2188 INCHES NOMINAL IN
SPECIAL FEATURESWITH CONE SPACER,OIL HOLE AND GROOVE IN CUP,BENCH LATERAL 0.0040 IN. IN
STANDARD TOLERANCE DESIGNATIONAFBMA CLASS 2
OTHER ITEMS IN FSC 3110 — Bearings, Antifriction, Unmounted
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
3110-00-001-1937 3110-00-001-1938 3110-00-001-4661 3110-00-001-4662 3110-00-001-4689 3110-00-001-4722
SUBSTITUTES & CROSS-REFERENCES 1
3021420-7Reference document
Same NSN cross-reference
Reference document — Vendor item drawing 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 438-432D?
438-432D is a BEARING,ROLLER,TAPERED.
What parts can replace 438-432D?
There is 1 known substitute for 438-432D: 3021420-7. Substitute compatibility should be verified for your specific system.
What is the NSN for 438-432D?
438-432D is cataloged in the U.S. Government catalog under NSN 3110-01-006-9118. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
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.