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FXB630 Flange Facing and Grooving Machine
59
APPENDIX B
SURFACE METROLOGY
First profile graphs of roughness texture were produced over fifty years ago by a German Engineer,
Gustav Schmalz. His graphs allowed differential magnification of vertical and horizontal axes so that a
visual assessment of surface could be made.
These profile graphs did not provide the direct indications of magnitude required by workshops. Of the
usual ways of measuring a wave from the deepest individual roughness depth of surface (R Max) was
too dependent on extremes e.g. dirt or scratches.
Conventional statistical terms like RMS present instrumental difficulties: The compromise is to use Ra
previously known as C.L.A. (Centre Line Average) which can be determined on a purely geometrical
basis and easily measured on an electrical instrument.
Ra
This is the arithmetic mean of the departure of the profile of the surface from the mean line.
Summary of Contents for SILK FXB630
Page 45: ...FXB630 Flange Facing and Grooving Machine 44 Fig 24 FXB630 mast and power cap assembly ...
Page 48: ...FXB630 Flange Facing and Grooving Machine 47 Fig 25 Surfacing arm assembly ...
Page 50: ...FXB630 Flange Facing and Grooving Machine 49 Fig 26 Gearbox assembly ...
Page 53: ...FXB630 Flange Facing and Grooving Machine 52 Fig 27 Base assembly ...
Page 55: ...FXB630 Flange Facing and Grooving Machine 54 Fig 28 Toolpost assembly ...
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Page 59: ...FXB630 Flange Facing and Grooving Machine 58 TOOLS FOR V GROOVE PLUNGE MACHINING ...
Page 63: ...FXB630 Flange Facing and Grooving Machine 62 APPENDIX C V GROOVE MEASUREMENT ...
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Page 65: ...FXB630 Flange Facing and Grooving Machine 64 APPENDIX D AIR MOTOR MANUFACTURERS INFORMATION ...
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