PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

7178-1Bearing,ball,duplex

Kaydon Corporation Dba Kaydon Corp · NSN 3110-00-175-2549 · FSC 3110 · No Item Name Available
Verified by PartsTable
NSN 3110-00-175-2549 — this item is cataloged by the U.S. Government under National Stock Number 3110-00-175-2549. Primary manufacturer part number: 7178-1.
Features
  • Bearing,ball,duplex — FSC 3110
  • Special Test Features: SPECIAL QUALITY CONTROL TESTING
  • Style Designator: COUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING
  • Material: STEEL OUTER RING
  • Special Test Features: SPECIAL QUALITY CONTROL TESTING
  • Material: STEEL INNER RING
  • Test Data Document: 81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
  • Bearing Preload Rating: 50.0 POUNDS NOMINAL LBS
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Outer Ring construction
General Description

The Bearing,ball,duplex, cataloged under National Stock Number 3110-00-175-2549, is classified within Federal Supply Class 3110 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Kaydon Corporation Dba Kaydon Corp. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3110-00-175-2549
Primary Part Number7178-1
Item NameBearing,ball,duplex
FSC / FSG3110 / 31 — No Item Name Available
ManufacturerKaydon Corporation Dba Kaydon Corp
StatusACTIVE
Special Test FeaturesSPECIAL QUALITY CONTROL TESTING
Style DesignatorCOUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING
MaterialSTEEL OUTER RING
Special Test FeaturesSPECIAL QUALITY CONTROL TESTING
MaterialSTEEL INNER RING
Test Data Document81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Bearing Preload Rating50.0 POUNDS NOMINAL LBS
Surface FinishGROUND
Load DirectionANGULAR
Bearing Preload Rating50.0 POUNDS NOMINAL LBS
Overall Outside Diameter7.1238 INCHES MINIMUM AND 7.1250 INCHES MAXIMUM IN
MaterialSTEEL INNER RING
Retainer Fabrication MethodPRESSED
Bore Diameter6.4990 INCHES MINIMUM AND 6.5000 INCHES MAXIMUM IN
MaterialSTEEL BALL
Load DirectionANGULAR
Style DesignatorCOUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING
MaterialSTEEL CORROSION RESISTING RETAINER
Test Data Document81349-MIL-P-23199 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5340-00-795-548971781 INTERCHANGEABLE
Seat,helical Compression Spring
Triumph Engine Control Systems Llc
5331-01-205-980571781 INTERCHANGEABLE
O-Ring
Eaton Corporation Dba Eaton Inoac Div Eaton
5310-01-238-0644990C178-H01 INTERCHANGEABLE
Nut,self-Locking,clinch
Northrop Grumman Systems Corporation Dba Electronic Systems
5999-01-591-8895717820-1 INTERCHANGEABLE
Strip,shorting
Raytheon Company Dba Raytheon
7025-01-644-9571717820-1 INTERCHANGEABLE
Disk Drive Unit
Miltope Corporation
Cross-Reference Index
Part NumberManufacturer
7178-1 Kaydon Corporation Dba Kaydon Corp (USA)
7178201 Kaydon Corporation Dba Kaydon Corp (USA)
Related Parts
5340-00-795-5489INTERCHANGEABLE
SEAT,HELICAL COMPRESSION SPRING
71781
5331-01-205-9805INTERCHANGEABLE
O-RING
71781
5310-01-238-0644INTERCHANGEABLE
NUT,SELF-LOCKING,CLINCH
990C178-H01
5999-01-591-8895INTERCHANGEABLE
STRIP,SHORTING
717820-1
7025-01-644-9571INTERCHANGEABLE
DISK DRIVE UNIT
717820-1

Frequently Asked Questions

What is NSN 3110-00-175-2549?

NSN 3110-00-175-2549 is a Bearing,ball,duplex, manufactured by Kaydon Corporation Dba Kaydon Corp, classified under FSC 3110 (No Item Name Available). Status: active.

What are the part numbers for NSN 3110-00-175-2549?

NSN 3110-00-175-2549 has 2 cross-referenced part numbers: 7178-1 (Kaydon Corporation Dba Kaydon Corp), 7178201 (Kaydon Corporation Dba Kaydon Corp).

What NSN replaces 3110-00-175-2549?

There are 5 known substitutes for 3110-00-175-2549: 5340-00-795-5489, 5331-01-205-9805, 5310-01-238-0644 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 7178-1?

Key specifications for 7178-1: Special Test Features: SPECIAL QUALITY CONTROL TESTING; Style Designator: COUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING; Material: STEEL OUTER RING; Special Test Features: SPECIAL QUALITY CONTROL TESTING. 22 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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