149 Machine Tools I

1. centre (Am. center) lathe

1. headstock with gear control (geared headstock)

2. reduction drive lever

2. lever for normal and coarse threads

3. speed change lever

4. leadscrew reverse-gear lever

5. change-gear box

3. feed gearbox (Norton tumbler gear)

4. levers for changing the feed and thread pitch

10. feed gear lever (tumbler lever)

11. switch lever for right or left hand action of main spindle

12. lathe foot (footpiece)

13. leadscrew handwheel for traversing of saddle (longitudinal movement of saddle)

14. tumbler reverse lever

15. feed screw

16. apron (saddle apron, carriage apron)

17. lever for longitudinal and transverse motion

18. drop (dropping) worm (feed trip feed tripping device) for engaging feed mechanisms

19. lever for engaging half nut of leadscrew (lever for clasp nut engagement)

20. lathe spindle

21. tool post

22. top slide (tool slide, tool rest)

23. cross slide

24. bed slide

25. coolant supply pipe

26. tailstock centre (Am. center)

27. barrel (tailstock barrel)

28. tailstock barrel clamp lever

29. tailstock

30. tailstock barrel adjusting handwheel

31. lathe bed

32. leadscrew

33. feed shaft

34. reverse shaft for right and left hand motion and engaging and disengaging

35. four-jaw chuck (four-jaw independent chuck)

36. gripping jaw

37. three-jaw chuck (three-jaw self- centring, self-centering, chuck)

38. turret lathe

39. cross slide

40. turret

41. combination toolholder (multiple turning head)

42. top slide

43. star wheel

44. coolant tray for collecting coolant and swarf

45-53 lathe tools

45. tool bit holder (clamp tip tool) for adjustable cutting tips

46. adjustable cutting tip (clamp tip) of cemented carbide or oxide ceramic

47. shapes of adjustable oxide ceramic tips

48. lathe tool with cemented carbide cutting edge

49. tool shank

50. brazed cemented carbide cutting tip (cutting edge)

51. internal facing tool (boring tool) for corner work

52. general-purpose lathe tool

53. parting (parting - off) tool

54. lathe carrier

55. driving (driver) plate 56-72 measuring instruments

56. plug gauge (Am. gage)

57. 'GO' gauging (Am. gaging) member (end)

58. 'NOT GO' gauging (Am. gaging) member (end)

59. calliper (caliper, snap) gauge (Am. gage)

60. 'GO'side

61. 'NOT GO' side

62. micrometer

63. measuring scale

64. graduated thimble

65. frame

66. spindle (screwed spindle)

67. vernier calliper (caliper) gauge (Am. gage)

68. depth gauge (Am. gage) attachment rule

69. vernier scale

70. outside jaws

71. inside jaws

72. vernier depth gauge (Am. gage)