PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

311SW1Bearing,ball,annular

Skf Usa Inc. · NSN 3110-00-155-9546 · FSC 3110 · No Item Name Available
Verified by PartsTable
NSN 3110-00-155-9546 — this item is cataloged by the U.S. Government under National Stock Number 3110-00-155-9546. Primary manufacturer part number: 311SW1.
Features
  • Bearing,ball,annular — FSC 3110
  • Standard Tolerance Designation: ABEC NO.1
  • Bore Shape: STRAIGHT
  • Style Designator: NON-LOADING GROOVE, NON-SEPARABLE
  • Material: STEEL BALL
  • Material: STEEL INNER RING
  • Material: STEEL OUTER RING
  • Bore Diameter: 55.00 MILLIMETERS NOMINAL MM
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Ball construction
General Description

The Bearing,ball,annular, cataloged under National Stock Number 3110-00-155-9546, is classified within Federal Supply Class 3110 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Skf Usa Inc.. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3110-00-155-9546
Primary Part Number311SW1
Item NameBearing,ball,annular
FSC / FSG3110 / 31 — No Item Name Available
ManufacturerSkf Usa Inc.
StatusACTIVE
Standard Tolerance DesignationABEC NO.1
Bore ShapeSTRAIGHT
Style DesignatorNON-LOADING GROOVE, NON-SEPARABLE
MaterialSTEEL BALL
MaterialSTEEL INNER RING
MaterialSTEEL OUTER RING
Bore Diameter55.00 MILLIMETERS NOMINAL MM
Surface FinishGROUND
Load DirectionRADIAL
Outer Ring Width29.00 MILLIMETERS NOMINAL MM
Inner Ring Width1.9375 INCHES NOMINAL IN
Overall Outside Diameter120.00 MILLIMETERS NOMINAL MM
Internal Fit-Up DesignationSTANDARD
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3110-00-151-811417A4086ITEM1 INTERCHANGEABLE
Bearing,ball,annular
Westinghouse Electric Corp
5975-00-152-1144 INTERCHANGEABLE
Box Connector,electrical
5360-00-209-9947 INTERCHANGEABLE
Spring,helical,extension
5950-00-228-2578 INTERCHANGEABLE
Transformer,radio Frequency
5325-00-432-8531402601 INTERCHANGEABLE
Grommet,nonmetallic
Sabreliner Corp
3110-00-555-55702251193 INTERCHANGEABLE
Bearing,ball,annular
Fairbanks Morse, Llc
3020-00-678-3663372683LAPC4611 INTERCHANGEABLE
Chain,roller
Naval Ship Systems Command
2520-00-737-2450 INTERCHANGEABLE
Packing
6685-00-739-8447 INTERCHANGEABLE
Indicator,temperature,electrical
6685-00-981-7812939262R91 INTERCHANGEABLE
Indicator,temperature,electrical
Cnh Industrial America Llc Dba Cnh America
Cross-Reference Index
Part NumberManufacturer
311SW1 PRIMARY Skf Usa Inc. (USA)
I72311 Skf Usa Inc. (USA)
4611 General Motors Corp Delco Moraine Ndh Div (USA)
311W Federal-Mogul Corp Government Sales Dept (USA)
6311WIRCE1TX9 Nsk Corp Bearing Div (USA)
4611 General Motors Corp (USA)
Related Parts
3110-00-151-8114INTERCHANGEABLE
BEARING,BALL,ANNULAR
17A4086ITEM1
5975-00-152-1144INTERCHANGEABLE
BOX CONNECTOR,ELECTRICAL
5360-00-209-9947INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
5950-00-228-2578INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
5325-00-432-8531INTERCHANGEABLE
GROMMET,NONMETALLIC
402601
3110-00-555-5570INTERCHANGEABLE
BEARING,BALL,ANNULAR
2251193
3020-00-678-3663INTERCHANGEABLE
CHAIN,ROLLER
372683LAPC4611
2520-00-737-2450INTERCHANGEABLE
PACKING
6685-00-739-8447INTERCHANGEABLE
INDICATOR,TEMPERATURE,ELECTRICAL
6685-00-981-7812INTERCHANGEABLE
INDICATOR,TEMPERATURE,ELECTRICAL
939262R91
6210-01-074-7952INTERCHANGEABLE
AIMING DEVICE
4611
5905-01-149-9343INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND,INDUCT

Frequently Asked Questions

What is NSN 3110-00-155-9546?

NSN 3110-00-155-9546 is a Bearing,ball,annular, manufactured by Skf Usa Inc., classified under FSC 3110 (No Item Name Available). Status: active.

What are the part numbers for NSN 3110-00-155-9546?

NSN 3110-00-155-9546 has 6 cross-referenced part numbers: 311SW1 (Skf Usa Inc.), I72311 (Skf Usa Inc.), 4611 (General Motors Corp Delco Moraine Ndh Div), 311W (Federal-Mogul Corp Government Sales Dept), 6311WIRCE1TX9 (Nsk Corp Bearing Div) and 1 more.

What NSN replaces 3110-00-155-9546?

There are 12 known substitutes for 3110-00-155-9546: 3110-00-151-8114, 5975-00-152-1144, 5360-00-209-9947 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 311SW1?

Key specifications for 311SW1: Standard Tolerance Designation: ABEC NO.1; Bore Shape: STRAIGHT; Style Designator: NON-LOADING GROOVE, NON-SEPARABLE; Material: STEEL BALL. 13 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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