BS 3800-1:1990

Foreword
Committees responsible
Code of practice
0. Introduction
1. Scope
2. General considerations
2.0 Definition
2.1 Definitions relating to geometrical checks
2.2 Testing methods and use of checking instruments
2.3 Tolerances
3. Preliminary checking operations
3.1 Installation and levelling of the machine before
     testing
3.2 Condition of the machine before testing
4. Practical tests
4.1 Testing
4.2 Checking of workpieces in practical tests
4.3 Importance of practical tests
5. Geometrical checks
5.1 General
5.2 Straightness
5.3 Flatness
5.4 Parallelism, equidistance and coincidence
5.5 Squareness
5.6 Rotation
6. Special checks
6.1 Division
6.2 Determination of the rectilinear deviations of
     screw driven components
6.3 Angular play
6.4 Repeatability of devices with angular indexing,
     e.g. turrets
6.5 Intersection of axes
6.6 Digital readout devices (DRO)
6.7 Circularity
6.8 Cylindricity
6.9 Consistency of machined diameters
Appendices
A. Equipment for testing the accuracy of machine tools
B. Corresponding clause numbers in BS 3800: 1964 and
     BS 3800: Part 1: 1990
Tables
1. Tolerances on straightness of working faces
2. Tolerances on mandrels
3. Mandrels between centres
4. Dimensions of mandrels
5. Corresponding clause numbers in BS 3800: 1964 and
    BS 3800: Part 1: 1990
Figures
1. Defects of form
2. Tolerance of positioning
3. Trajectory
4. Trajectory of a point on a moving part
5. Local deviation
6. Measuring run-out
7. Axes
8. Straightness of a line
9. Dimensional deviations
10. Vertical plane measurement
11. Horizontal plane measurement
12. Taut wire and microscope
13. Alignment telescope
14. Lasers
15. Angular deviations
16. Plot of results of angular deviations
17. Precision level method
18. Autocollimator
19. Use of laser interferometer for angle measurement
20. Tolerance zones
21. Measuring straightness
22. Supporting devices for vee surfaces
23. Supporting devices for vertical surfaces
24. Slant bed configuration
25. Angular deviation about axes
26. Checking flatness
27. 'Bridge' type application of level
28. Checking flatness by means of precision level
29. Angular deviation measurement
30. Circular checking
31. Sweep optical square
32. Measurement of surface flatness
33. Checking flatness by laser interferometry
34. Measuring parallelism
35. Method of rocking of dial gauge
36. Auxiliary block
37. Use of square
38. Checking parallelism of axis to plane
39. Checking parallelism of an axis to intersection
    of two planes
40. Use of mounting block and precision level
41. Use of mounting block and dial gauge
42. Use of dial gauge and special support
43. Use of level on special support
44. Dial gauge in spindle nose
45. Measuring instrument attached to moving element
46. Angle level attachment
47. Adaptor square
48. Parallelism of trajectory to an axis
49. Parallelism of two trajectories
50. Measuring equidistance
51. Pivoting axis measurement
52. Measuring coincidence (alignment)
53. Mounting rig
54. Graph
55. Measuring squareness
56. Cylindrical square method
57. Checking two axes at 90 deg to each other
58. Checking an axis of rotation
59. Checking a fixed axis
60. Checking an axis at 90 deg to the intersection of
    two planes
61. Checking an axis of rotation
62. Use of square
63. Use of dial gauge
64. Checking perpendicularity
65. Checking trajectory of a point at 90 deg to an axis
66. Checking two trajectories perpendicular to each other
67. Alignment telescope or laser measurement system
68. Eccentricity
69. Radial throw
70. Checking run-out
71. Test mandrel mounted in bore
72. Periodic axial slip
73. Axial slip measurement
74. Use of flat contact
75. Use of ball contact
76. Application of force along machine axis
77. Camming
78. Camming due to axis misalignment
79. Measurement of camming
80. Graphical representation of errors
81. Determination of local error
82. Successive errors of division
83. Determination of total error
84. Intersection of axes
85. Checking digital readout
86. Checking digital readout using laser
87. Circularity tolerance zone
88. Rotating pickup (circularity measuring machine)
89. Rotating table (circularity measuring machine)
90. Use of coordinate measurement
91. Projected profile
92. Vee block method (circularity measuring machine)
93. Cylindricity tolerance zone
94. Coordinate measurement of cylindricity
95. Rotating pickup (cylindricity measuring machine)
96. Rotating table (cylindricity measuring machine)
97. Vee block method (cylindricity measuring machine)
98. Test piece for consistency of diameter
99. Use of bench comparator
100. Micrometer method
101. Bow shaped straightedge
102. I-section straightedge
103. Position of handling slots
104. Square
105. Cylindrical square
106. Cylindrical square 'X' section
107. Open form block square
108. Solid form block square
109. Adjustable spirit level
110. Electronic level
111. Dial gauge plunger type
112. Dial gauge level type
113. Cartridge head gauge
114. Lever head gauge
115. Typical steel or cast-iron plate
116. Typical granite plate
117. Surface plate supporting feet positions
118. Test mandrels
119. Mandrel for use between centres
120. Mandrels: metric dimensions
121. Correct set-up for minimization of deadpath error
122. Measurement of cosine error
123. Measurement of Abbe
124. Schematic layout of alignment laser
125. Sweep optical square
126. 'LURD' principle
127. Microscope with taut wire
128. Autocollimator
129. Alignment telescope mounted on a horizontal base
130. Checking straightness by measuring displacements
     from the line of sight
131. View of cross-wires target and micrometer dials

Geometrical and practical test methods. Definitions, use of checking instruments, explanation of tolerances, describes preliminary checking operations and accuracy of the instruments required. BS 4656 deals with acceptance tests on particular types of machine tools.