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74545A — BEARING,ROLLER,TAPERED

✓ Government record, cited
— · TAPERED BEARING
PRODUCT OVERVIEW

74545A: 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 overall_width: 6.140 INCHES NOMINAL IN, overall_height: 3.850 INCHES NOMINAL IN, overall_length: 8.280 INCHES NOMINAL IN, scale_accuracy: 0.008% OF FULL SCALE OR BETTER, environmental_attribute_code: BAROMETERS & HYGROMETERS - CONSUMER PRODUCTS - NON-MERCURY ALTERNATIVE, part_name_assigned_by_controlling_agency: STANDARD BAROMETER. This part is cataloged in the U.S.

Government catalog under NSN 3110-00-100-5793, 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
74545A
NSN: 3110-00-100-5793
NIINs: 001005793, 015534279
FSC: 3110 — Bearings, Antifriction, Unmounted
CAGE: 28265 — HERCULES ENGINE CO INC (USA)
SPECIFICATIONS
overall_width6.140 INCHES NOMINAL IN
overall_height3.850 INCHES NOMINAL IN
overall_length8.280 INCHES NOMINAL IN
scale_accuracy0.008% OF FULL SCALE OR BETTER
environmental_attribute_codeBAROMETERS & HYGROMETERS - CONSUMER PRODUCTS - NON-MERCURY ALTERNATIVE
part_name_assigned_by_controlling_agencySTANDARD BAROMETER
NSN3110-00-100-5793
COMPONENT DIAGRAM
TAPERED ROLLER BEARING — CUP & CONE ASSEMBLY CAGE CUP BORE CONE OD: — · BORE: — · WIDTH: — Single Row · PN: 74545A · 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
•
CUP OUTSIDE DIAMETER: 1.5745 INCHES NOMINAL IN
•
FLANGE OUTSIDE DIAMETER: 1.6995 INCHES NOMINAL IN
•
CUP WIDTH: 0.3750 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STRAIGHT BORE, FLANGED CUP, NORMAL ANGLE
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-624 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-624 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-624 FED SPEC 3RD MATERIAL RESPONSE OR 66 FED STD 4TH MATERIAL RESPONSE CONE
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
CUP OUTSIDE DIAMETER1.5745 INCHES NOMINAL IN
FLANGE OUTSIDE DIAMETER1.6995 INCHES NOMINAL IN
CUP WIDTH0.3750 INCHES NOMINAL IN
STYLE DESIGNATORSTRAIGHT BORE, FLANGED CUP, NORMAL ANGLE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-624 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-624 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-624 FED SPEC 3RD MATERIAL RESPONSE OR 66 FED STD 4TH MATERIAL RESPONSE CONE
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-624 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-624 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-624 FED SPEC 3RD MATERIAL RESPONSE OR 66 FED STD 4TH MATERIAL RESPONSE CUP
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-624 FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-624 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-624 FED SPEC 3RD MATERIAL RESPONSE OR 66 FED STD 4TH MATERIAL RESPONSE ROLLER
OVERALL WIDTH0.4730 INCHES NOMINAL IN
BACKFACE CORNER RADIUS0.0460 INCHES NOMINAL IN
CONE CORNER RADIUS0.0400 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 7
AP10699Reference document
Same NSN cross-reference
Reference document — Secondary reference
B2010-19PC332Reference document
Same NSN cross-reference
Reference document — Secondary reference
3853PC18Reference document
Same NSN cross-reference
Reference document — Secondary reference
A6075ANDA6157BReference document
Same NSN cross-reference
Reference document — Secondary reference
4359PC9Reference document
Same NSN cross-reference
Reference document — Secondary reference
3156PC18Reference 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 74545A?
74545A is a BEARING,ROLLER,TAPERED.
What parts can replace 74545A?
There are 7 known substitutes for 74545A: AP10699, B2010-19PC332, 3853PC18 and 4 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 74545A?
74545A is cataloged in the U.S. Government catalog under NSN 3110-00-100-5793. 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.