CNC Machinist Training Course Curriculum Classes

Core Machining Classes

• Shop safety: Personal protective equipment, machine guarding, safe operating procedures and hazard awareness.
• Applied shop mathematics: Fractions, decimals, unit conversions, geometry and basic trigonometry.
• Blueprint reading: Drawing views, dimensions, tolerances, symbols, surface-finish requirements and introductory geometric dimensioning and tolerancing.
• Precision measurement: Proper use of calipers, micrometers, indicators, gauges and other inspection equipment.
• Materials and cutting tools: Common metals, material properties, tool selection, speeds and feeds, coolants and tool wear.

Manual Machining

Many programs teach manual machining before or alongside CNC operation. Manual work helps students understand cutting forces, workholding, machine movement and the sequence required to produce a finished part.

• Engine-lathe setup and operation
• Manual milling-machine setup and operation
• Drilling, boring, reaming and tapping
• Bench work, layout and deburring
• Workholding, indicating and part alignment

CNC Operation and Setup

CNC laboratory classes should progress beyond simply loading parts and pressing cycle start. Students should learn how to prepare a machine, establish reference positions and verify a job safely.

• CNC mill and lathe controls
• Machine startup and shutdown procedures
• Tool loading and tool-length or geometry offsets
• Work offsets and coordinate systems
• Vises, chucks, fixtures and other workholding methods
• Program prove-out, single-block operation and dry runs
• Tool changes, in-process inspection and offset adjustments
• Basic troubleshooting of alarms and dimensional problems

CNC Programming

Programming instruction commonly begins with manually written programs so students understand how machine commands control movement. Topics may include:

• Program structure and sequence numbers
• G-codes and M-codes
• Absolute and incremental positioning
• Linear and circular interpolation
• Spindle speeds and feed rates
• Tool and work offsets
• Cutter compensation and tool-length compensation
• Drilling cycles, subprograms and program editing

More advanced courses may introduce CAD/CAM software, toolpath creation, post-processing and program simulation. The specific software and machine controls vary by school.

Inspection and Process Planning

A machinist must be able to confirm that a part meets its drawing requirements. Training should include inspection planning, recording measurements, recognizing process variation and correcting dimensions without creating scrap.

Students may also learn how to select stock, plan an order of operations, choose cutting tools, calculate setup requirements and document the manufacturing process.

What to Look for in a Program

• Regular access to functioning manual and CNC machines
• Hands-on projects that require setup, machining and inspection
• Instruction on both CNC mills and lathes
• Training with equipment and controls used by nearby employers
• Experienced instructors with practical machining backgrounds
• Opportunities for internships, apprenticeships or employer contact
• A clear explanation of program length, costs and completion requirements

Course titles differ between schools, so compare the actual learning outcomes rather than relying on the program name alone. A strong curriculum should prepare students to read a print, plan a job, set up equipment, operate it safely and inspect the finished part.