mos.directory

Navy Rating · Engineering

MR Machinery Repairman

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

Browse Navy

Overview

A Machinery Repairman operates machine tools to manufacture replacement parts for engines, propulsion systems, auxiliary systems, and other equipment. Machinery Repairmen use computer numerically controlled machines, computer aided design, lathes, mills, grinders, saws, drill presses, portable machinery, hand tools, and measuring instruments.

Minimum ASVAB: VE+AR+MK+AS 205 or VE+AR+MK+MC 205

ASVAB policy: Not policy-reviewed · coverage unknown · as of 2026-10-18

Program scope has not been reviewed.

Policy applicability and coverage of the program's score routes have not been reviewed. Shown-route arithmetic is not an eligibility decision.

Source: milpersman-1306-618-rating-list-2026-04 (source date 2026-04). Policy applicability has not been established.

See if you would hit this score: free ASVAB practice test

Core Skills

  • Replacement-part fabrication for propulsion and auxiliary systems
  • CNC machining and computer-aided design
  • Portable machining and measurement outside the shop

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

Machinists

MR experience manufacturing replacement parts with lathes, milling machines, boring mills, and grinders directly overlaps civilian machining work.

How to prepare: Prepare a non-sensitive work-sample portfolio showing a replacement part, the machining operations used, and measurements of the finished part.

What the civilian work involves
  • Machine parts to specifications, using machine tools, such as lathes, milling machines, shapers, or grinders.
  • Calculate dimensions or tolerances, using instruments, such as micrometers or vernier calipers.
  • Measure, examine, or test completed units to check for defects and ensure conformance to specifications, using precision instruments, such as micrometers.
Civilian tools and software (examples)
  • Autodesk AutoCAD

Computer Numerically Controlled Tool Operators

MR use of CNC machines to manufacture replacement parts transfers directly to computer-controlled production machining.

How to prepare: Arrange hands-on practice with the CNC controller used by target employers, covering workpiece setup, tooling changes, and finished-part measurement.

What the civilian work involves
  • Set up and operate computer-controlled machines or robots to perform one or more machine functions on metal or plastic workpieces.
  • Mount, install, align, and secure tools, attachments, fixtures, and workpieces on machines, using hand tools and precision measuring instruments.
  • Measure dimensions of finished workpieces to ensure conformance to specifications, using precision measuring instruments, templates, and fixtures.
Civilian tools and software (examples)
  • Autodesk AutoCAD

Tool and Die Makers

MR replacement-part fabrication, CAD use, and conventional and CNC machining provide a foundation for making specialized tooling.

How to prepare: Complete a supervised tooling project that includes fitting and assembling a jig or die, building beyond the replacement-part machining documented for MR.

What the civilian work involves
  • Study blueprints, sketches, models, or specifications to plan sequences of operations for fabricating tools, dies, or assemblies.
  • Fit and assemble parts to make, repair, or modify dies, jigs, gauges, and tools, using machine tools, hand tools, or welders.
  • Verify dimensions, alignments, and clearances of finished parts for conformance to specifications, using measuring instruments such as calipers, gauge blocks, micrometers, or dial indicators.
Civilian tools and software (examples)
  • Autodesk AutoCAD

Notes & Sources

Evidence for this guidance (4 documents)
  1. NAVPERS 18068F Vol I (NEOCS, Jan 2026 edition): MACHINERY REPAIRMAN (MR)

    [1] Rating chapter "SCOPE OF RATING"; cached text line 53985; NAVPERS 18068F Vol I, 2026-01 edition

    Supports: Replacement-part fabrication for propulsion and auxiliary systems, CNC machining and computer-aided design, Portable machining and measurement outside the shop, Machinists (O*NET 51-4041.00), Computer Numerically Controlled Tool Operators (O*NET 51-9161.00), Tool and Die Makers (O*NET 51-4111.00)

  2. O*NET: Machinists

    [2] O*NET 30.3 occupational data

    Supports: Machinists (O*NET 51-4041.00)

  3. O*NET: Computer Numerically Controlled Tool Operators

    [3] O*NET 30.3 occupational data

    Supports: Computer Numerically Controlled Tool Operators (O*NET 51-9161.00)

  4. O*NET: Tool and Die Makers

    [4] O*NET 30.3 occupational data

    Supports: Tool and Die Makers (O*NET 51-4111.00)

Defense contractor jobs for MR

Predecessor codes

Historical codes with documented links to MR. Each history page explains the change.

MM(SRO)Machinist's Mate (SR) (Outside Machinists)MMSMachinist's Mate (S) (Shop Machinist's)

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

Report an error on this page