Colin J. Rafferty
Machinist, Computer Numerical Control Milling
Dayton, OH · (937) 555 0141 · name@example.com · linkedin.com/in/colinjrafferty
Key Qualifications
EXPERIENCE
Five years of computer numerical control milling in contract manufacturing
SETTINGS
Contract machine shop with 30 machines and about 70 employees
SPECIALTIES
Three and four axis milling, fixture design, Mastercam programming, tight tolerance titanium work
SYSTEMS
Haas and Okuma controls, Mastercam, SolidWorks, Zeiss Calypso coordinate measuring, ProShop
LICENSURE
National Institute for Metalworking Skills, four credentials in milling, measurement and job planning
EDUCATION
Associate of Applied Science in Precision Machining, Miami Valley Technical College
Executive Summary
Computer numerical control machinist with five years at a contract manufacturer that machines about 1,200 part numbers a year for hydraulic, defense and industrial customers. Sets up and runs three and four axis vertical mills from the print and the model, writes and edits programs in Mastercam and at the Haas control, and holds tolerances to plus or minus 0.0005 inch on titanium and stainless work. Holds four National Institute for Metalworking Skills credentials.
Signature Achievements
- Sets up and runs about 250 jobs a year across three vertical mills with a scrap rate of 0.4 percent and no customer rejection in two years.
- Cut cycle time on a titanium valve body from 84 minutes to 51 by reprogramming the roughing in Mastercam with high efficiency toolpaths.
- Designed a four station tombstone fixture that took a bracket family from single part setups to 16 parts a load.
- Reduced average setup time from 55 minutes to 32 by building a setup sheet with photographs and offsets for every repeat job.
- Earned National Institute for Metalworking Skills credentials in milling operations, milling programming, measurement and job planning.
- Passed the shop's tight tolerance qualification for plus or minus 0.0005 inch work in the first year.
Professional Experience
Computer Numerical Control Machinist
Great Miami Precision Manufacturing, Dayton, OH August 2022 to present
Contract manufacturer with 30 machines; sets up and runs three vertical mills on first shift for hydraulic and defense parts
- Set up vises, fixtures and tool libraries from the setup sheet, touch off tools and prove out new programs.
- Write and edit programs in Mastercam and at the Haas and Okuma controls for three and four axis work.
- Machine titanium, stainless, aluminum and tool steel to tolerances of plus or minus 0.0005 inch.
- Inspect first pieces and in process parts with micrometers, bore gauges and the coordinate measuring machine.
- Design and build fixtures in SolidWorks for repeat jobs and document them in ProShop.
Machinist Apprentice
Stillwater Machine and Tool, Troy, OH June 2021 to August 2022
Registered apprenticeship at a 25 person job shop
- Ran manual mills and lathes, surface grinders and a computer numerical control mill under a journeyman.
- Learned setup, offsets, tool selection and inspection on production jobs.
- Completed related instruction in blueprint reading, geometric dimensioning and tolerancing and shop math.
Certifications and Training
National Institute for Metalworking Skills, Computer Numerical Control Milling Operations and Milling Programming Setup and Operations credentials
National Institute for Metalworking Skills, Measurement, Materials and Safety, and Job Planning, Benchwork and Layout credentials
Occupational Safety and Health Administration 10 hour general industry card, completed 2021
Education
Associate of Applied Science in Precision Machining, Miami Valley Technical College, Dayton, 2022
Core Skills
Four axis milling · Mastercam programming · Fixture design · Titanium machining · Tight tolerance work · Coordinate measuring machine inspection · Setup sheet documentation · Geometric dimensioning and tolerancing · Tool library management · High efficiency toolpaths