Needle roller bearing MIL-B-3990

Manufacturer Specification

Brand
MILITARY SPECIFICATIONS
Bore Diameter
Between 0.4993 inches and 0.5000 inches
Overall Outside Diameter
Between 1.3115 inches and 1.3135 inches
Lubrication Material
Grease
Outer Ring Width
Between 0.4850 inches and 0.5000 inches
Inner Ring Width
Between 0.6150 inches and 0.6250 inches
Crown Radius
10.0000 inches
Surface Finish
Ground
Seal Quantity
2
Bearing Seal Type
Contact
Alignment Type
Self-aligning
Self-alignment Location
External
Features Provided
Lubrication hole and lubrication groove
Lubrication Material Specification
Mil-g-81322 military specification single material response
Material Specification
L-p-392 federal specification 1st material response seal or l-p-410, type 6/6 federal specification 2nd material response seal
Surface Treatment Specification
Qq-c-320 federal specification single treatment response outer ring
Surface Treatment Specification
Qq-p-416, type 1, class 2 federal specification 1st treatment response inner ring or mil-c-13924 military specification 2nd treatment response inner ring
Surface Treatment Specification
Qq-p-416, type 1, class 2 federal specification 1st treatment response retaining plate or mil-c-13924 military specification 2nd treatment response retaining plate
Style Designator
Track roller
NSN
3110-01-256-9277
Description
Bearing,roller,needle

Product Details

Steel comp e50100 retaining plate or steel comp e51100 retaining plate or steel comp e52100 retaining plate or steel comp 4615 retaining plate or steel comp 4617 retaining plate or steel comp 4620 retaining plate material, cadmium retaining plate or oxide retaining plate surface treatment.

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last updated on 04/19/2024