N3904025Q4883 Attachment 5 -MT LH padeye prop drawing_3.pdf

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PNSY- Electrical Discharged Machine (EDM) Notching
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N3904025Q4883
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This document is a technical specification for fabricating a Dry MT L&H Padeye Prop #3 for the Portsmouth Naval Shipyard. The specification details the precise requirements for creating four ultra-fine Electrical Discharge Machining (EDM) notches on a carbon steel plate. Each notch is to be 0.250" long, 0.006" wide, and 0.040" deep, with strict tolerances of +/- 0.002" for length and -0.002" for depth. The notches are to be located on the base metal, with Notch #2 positioned approximately 1/16" from the weld toe, and all notches are to be disguised with epoxy. The material will be provided by PNS (Portsmouth Naval Shipyard), and the technical specifications are documented by Scott Webster, a Non-Destructive Testing (NDT) Engineering Technician and Instructor.

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File Type Posted
N3904025Q4883 Attachment 6 -MT LH padeye prop drawing_4.pdf PDF
N3904025Q4883 Request for Quote (RFQ).pdf PDF
N3904025Q4883 Attachment 3- MT LH padeye prop drawing_1.pdf PDF
N3904025Q4883 Attachment 4 -MT LH padeye prop drawing_2.pdf PDF
N3904025Q4883 Attachment 2- OPSEC Encl 2_Redacted.pdf PDF
GFPN3904025Q4883 Attachment 1.pdf PDF

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Dry MT L&H Padeye Prop #3

Scott Webster Code 135T NDT Eng. Tech. / Instructor Portsmouth Naval Shipyard, Kittery Maine Phone: (207)438-4057 Fax: (207)438-6917

Four Ultra-Fine EDM Notches Placed per Sketch Approximate Locations

Notch #1 = .250” long, .006” wide, .040” deep Notch #2 = .250” long, .006” wide, .040” deep Notch #3 = .250” long, .006” wide, .040” deep Notch #4 = .250” long, .006” wide, .040” deep Length Tolerance +/- .002” Depth Tolerance - .002” (Note: Width & Depth Dim.

Width Tolerance - .001 are max allowed) Epoxy Disguise All Notches Material is Carbon Steel PNS will be providing the material

NOTCH #1

View from “A”side of plate

NOTCH #4

NOTCH #3

NOTCH #2 On base metal approximately 1/16” from weld toe

File details come from the government source that posted it. Updated .