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National Stock Number:
3120-00-253-6078
Federal Supply Class:
3120
National Item Identification Number:
002536078
Description:
BEARING,WASHER,THRUST
Detail:
An item of any peripheral shape usually having one flat or spherical surface and a centrally located hole. It is designed for applications involving moving (kinetic) loads. Except for items fabricated from bearing quality synthetic (plastic) or composed of multilayer material, one bearing surface must either have a specific surface finish designation of 32 microinch (0.8 micrometre) or less, arithmetical average (aa) (arithmetic mean deviation) or one of the following conditions: be lapped or ground; have visible or detectable means of lubrication; grooves, indentations; or self-lubrication. The thickness must not exceed 25 percent of the outside diameter of the shortest distance between peripheral flats (when thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance). Excludes straight, tubular (without flange) items having a bearing surface(s) parallel to the axis of the bore only. See also WASHER, FLAT and SPACER, SLEEVE.
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Manufacturer Information:
| 10159039 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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Techincal Specification:
| MATERIAL | STEEL COMP 1018 OR | | STEEL COMP 1074 OVERALL | | HARDNESS RATING | 58.0 ROCKWELL C MINIMUM AND | | 62.0 ROCKWELL C MAXIMUM OVERALL | | STYLE DESIGNATOR | ROUND | | OUTSIDE DIAMETER | 1.9070 INCHES MINIMUM AND | | 1.9270 INCHES MAXIMUM | | CORNER SHAPE | SQUARE ALL CORNERS | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | OVERALL THICKNESS | 0.0920 INCHES MINIMUM AND | | 0.0950 INCHES MAXIMUM | | CENTER HOLE SHAPE STYLE | ROUND | | DIAMETER | 1.2520 INCHES MINIMUM AND | | 1.2620 INCHES MAXIMUM | | SURFACE FINISH | 20.0 MICROINCHES INTERNAL SURFACES | | 20.0 MICROINCHES LEFT SIDE | | FEATURES PROVIDED | CASEHARDENED | | SPECIAL FEATURES | MATERIAL AISI 1018 SILICON KILLED 0.015 MIN 0.030 MAX SILICON,MATERIAL AISI 1074 MOD BY INCREASE OF MAX MANGANESE CONTENT FROM 0.80 PCT TO 0.90 PCT,OPTIONAL MATERIAL AISI 1074 MAY BE THROUGH HARDENED |
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