01 part1 02 parts of a lathe
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The document describes the main parts of a lathe, including the headstock, carriage, lathe bed, tailstock, cross slide, feed shaft, lead screw, chuck, toolpost, tool holders, and cutting tools. The headstock holds the spindle and gears. The carriage moves the cutting tool along the lathe bed. The lathe bed is made of cast iron and guides the carriage and tailstock.
01 part1 02 parts of a lathe
- 1. Parts of a Lathe S.Gunabalan Associate Professor Mechanical Engineering Department Bharathiyar College of Engineering & Technology Karaikal - 609 609. e-Mail : gunabalans@yahoo.com
- 2. Parts of a Lathe
- 3. Headstock Holds lathe spindle and gears Chuck is fitted to spindle Spindle is hollow for long bars
- 4. Carriage Moves the cutting tool along bed between tailstock and headstock
- 5. Carriage 4-Way Tool Post. Mounts up to four cutting tools at a time and rotates to index each of them to the workpiece as needed. Compound Rest Hand wheel. Moves the tool relative to the workpiece at the set angle. The attached indirect graduated dial has 0.001" (0.02mm) increments, with one full revolution equaling 0.100" (2.54mm) of travel. Carriage Handwheel Moves the carriage longitudinally along the bedway. The attached graduated dial has 0.020“ increments with one full revolution equaling 0.100" of travel.
- 6. Carriage Carriage Lock. Secures the carriage in place on the bedway for additional rigidity when the carriage should not move during the operation. Saddle. Supports the cross slide, compound rest, and tool post over the bedway.
- 7. Carriage Compound Rest Angle Scale. Displays the angle of the compound rest left or right from the spindle center line in increments of one degree. Feed Selection Lever. Selects either the carriage or cross slide for power feed operations. When in the neutral (middle) position, power feed is disabled. This lever works in conjunction with the feed knob.
- 8. Carriage Thread Chasing Dial Assembly. Displays the correct position to engage the half nut when inch threading. Half Nut Lever. Engages/disengages the half nut with the longitudinal lead screw for threading operations
- 9. Carriage Feed Knob. When tightened, engages either the carriage or cross slide for power feeding. Conversely, when loosened, disengages power feed. If the feed selection lever is in the neutral position or the half-nut is engaged, the feed knob has no effect. Half Nut Lever. Engages/disengages the half nut with the longitudinal lead screw for threading operations
- 10. Carriage Feed Knob. When tightened, engages either the carriage or cross slide for power feeding. Conversely, when loosened, disengages power feed. If the feed selection lever is in the neutral position or the half-nut is engaged, the feed knob has no effect. Cross Slide Handwheel. Moves the cross slide toward or away from the spindle centerline.
- 11. Cross Slide Handwheel. Moves the cross slide toward or away from the spindle centerline. Compound Rest Angle Scale. Displays the angle of the compound rest left or right from the spindle centerline in increments of one degree. Compound Rest Hand wheel. Moves the tool relative to the workpiece at the set angle.
- 12. LATHE BED Made from Gray Cast Iron Accurately machined slideways Slideways guide carriage & tailstock Headstock on upper end of the lathe bed
- 13. Lathe parts • Tailstock Can be moved along slideways Can be clamped in any location Inside tapered to hold drill chuck
- 14. Lathe parts • Cross Slide Fitted on the Saddle Moves cutting tool at right angles to lathe bed
- 15. Lathe parts • Feed shaft Used to move the Carriage automatically • Lead screw Used when screw cutting on the lathe
- 16. Lathe Parts • Three Jaw Chuck Self centring Holds round and hexagonal work 3 jaws are connected Jaws are stamped 1,2 & 3 and fitted in order Chuck key used to open
- 17. Lathe parts • Toolpost Fitted on top slide and carries the cutting tool or the cutting tool holder Can adjust the height on some types Can carry 4 different tool holders
- 18. Lathe parts • Tool holders Used for holding cutting tool bits Available in Right hand, left hand and straight
- 19. • Cutting Tools Can be High Speed Steel held in tool holders Can be also Ceramic (Tungsten carbide) bits held directly in toolpost