Conventional Lathe Course

Lesson 1 • Major Components and Their Functions

Identifies every major assembly: headstock, tailstock, carriage, and bed. Understanding each component's role is prerequisite to safe machine operation.

Lesson 2 • Shop Safety Rules and PPE

Establishes mandatory personal protective equipment and behavioral safety rules for the lathe environment. Compliance prevents the most common workshop injuries.

Lesson 3 • History and Types of Lathes

Traces lathe evolution from early pole lathes to modern engine lathes. Establishes context for understanding why conventional lathes remain essential in precision machining.

Lesson 1 • Micrometers and Precision Gauges

Covers outside, inside, and depth micrometers plus telescoping gauges. These instruments provide the resolution needed for close-tolerance turned diameters.

Lesson 2 • Reading Rules, Scales, and Calipers

Introduces steel rules, vernier calipers, and dial calipers for linear measurement. Accurate reading of these tools is the baseline skill for all subsequent machining tasks.

Lesson 3 • Layout Tools and Workpiece Marking

Teaches scribers, surface plates, height gauges, and layout dye application. Accurate layout transfers drawing dimensions directly onto raw stock before cutting.

Lesson 1 • Centers, Drivers, and Mandrels

Explains live centers, dead centers, lathe dogs, and mandrel setups for between-center turning. Between-center work ensures concentricity across multiple setups.

Lesson 2 • Workpiece Alignment and Runout Checking

Uses dial indicators to verify concentricity, face runout, and tailstock alignment. Eliminating runout before cutting is essential for achieving dimensional accuracy.

Lesson 3 • Three-Jaw and Four-Jaw Chuck Operation

Covers mounting, centering, and tightening procedures for both chuck types. The four-jaw chuck enables off-center and irregular workholding beyond the three-jaw's capability.

Lesson 1 • Indexable Insert Systems

Covers insert shapes, grades, coatings, and toolholder styles for indexable carbide systems. Indexable tooling reduces setup time and delivers consistent geometry without regrinding.

Lesson 2 • Tool Height and Positioning

Explains setting tool tip on center height and correct tool overhang. Improper height causes poor finish, chatter, and accelerated tool wear.

Lesson 3 • Grinding and Honing HSS Tools

Demonstrates pedestal grinder technique for shaping and sharpening HSS turning tools. A properly ground tool is the foundation of accurate, efficient lathe operation.

Lesson 4 • Cutting Tool Materials

Compares high-speed steel, carbide, ceramic, and CBN tool materials by hardness and application. Material selection directly affects cutting speed, feed, and surface quality.

Lesson 1 • Facing and Squaring Stock

Demonstrates facing cuts to produce a flat, square end on cylindrical stock. Facing establishes a reference datum for all subsequent length measurements.

Lesson 2 • Straight Turning to Diameter

Covers roughing and finishing passes to turn a workpiece to a specified diameter. Students use the cross-slide graduated collar to control diameter incrementally.

Lesson 3 • Shoulder and Step Turning

Produces square, filleted, and undercut shoulders at precise axial locations. Shoulder accuracy is critical for parts that must seat against mating components.

Lesson 4 • Speeds, Feeds, and Depth of Cut

Calculates spindle RPM from cutting speed and diameter, and selects feed and depth of cut. Correct parameters maximize material removal while protecting tool and workpiece.

Lesson 1 • Reaming for Precision Fit

Explains hand and machine reamer selection, pre-ream allowance, and reaming speed. Reaming produces the surface finish and tolerance required for press and slip fits.

Lesson 2 • Boring Bar Setup and Operation

Introduces boring bars, tool overhang limits, and boring to a target diameter. Boring corrects hole location and achieves tolerances impossible with drilling alone.

Lesson 3 • Center Drilling and Twist Drilling

Covers center drill selection, tailstock drilling technique, and peck drilling for deep holes. Proper center drilling prevents drill wander and ensures hole location accuracy.

Lesson 1 • Taper Terminology and Calculations

Defines taper per foot, taper per inch, included angle, and standard taper systems. Calculation accuracy determines whether a taper fits its mating socket correctly.

Lesson 2 • Compound Rest Taper Turning

Sets the compound rest to half the included angle to produce short, steep tapers. This method is best for internal tapers and angles exceeding the taper attachment range.

Lesson 3 • Tailstock Offset Taper Turning

Offsets the tailstock to produce gradual tapers on long workpieces held between centers. The method suits gentle tapers where the compound rest travel is insufficient.

Lesson 4 • Knurling Operations

Applies straight, diagonal, and diamond knurl patterns using knurling tool holders. Knurling improves grip on handles and provides press-fit interference on shafts.

Lesson 1 • Single-Point External Thread Cutting

Demonstrates grinding a 60-degree threading tool, setting compound to 29.5 degrees, and taking successive infeed passes. Students produce a thread that accepts a standard nut.

Lesson 2 • Lathe Gearbox and Change Gear Setup

Explains quick-change gearbox settings and change gear calculations for desired thread pitch. Correct gear selection synchronizes spindle rotation with carriage travel.

Lesson 3 • Thread Terminology and Standards

Defines pitch, lead, major and minor diameters, thread angle, and fit classes. Mastery of terminology is required to read thread callouts and set up the lathe correctly.

Lesson 4 • Single-Point Internal Thread Cutting

Covers boring to minor diameter, selecting an internal threading bar, and cutting internal threads. Internal threading requires careful tool clearance and frequent measurement.