Surface Plate: Difference between revisions
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(Created page with "A surface plate is a precision plate for measuring, layup, and precision tool making. https://en.wikipedia.org/wiki/Surface_plate#Accuracy_and_grade Grades - AA is under 5/1...") |
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A surface plate is a precision plate for measuring, layup, and precision tool making. | A surface plate is a precision plate for measuring, layup, and precision tool making. Granite is a common, inexpensive material for a surface plate. | ||
https://en.wikipedia.org/wiki/Surface_plate#Accuracy_and_grade | https://en.wikipedia.org/wiki/Surface_plate#Accuracy_and_grade | ||
Grades - AA is under 5/100 of a thousandth accuracy per foot. Tool room grade B is 0.0002 (5 micron). | Grades - AA is under 5/100 of a thousandth accuracy per foot. Tool room grade B is 0.0002 (5 micron). | ||
=Comparison= | |||
*Surface grinding - 0.001" per foot flatness (25 micron) [http://precisiongrinding.com/steel-plate-services/grinding/surface-grinding/] | |||
*Precision surface grinder - 1 micron (see [[Air Bearings]]. | |||
*Surface plate - same as precision surface grinder, as the precision surface grinder is based on surface plate | |||
=Sourcing= | =Sourcing= | ||
*Quite affordable for the precision. $116 for grade A, 24x18x3 - [https://www.ebay.com/itm/24-x-18-x-3-GRADE-A-GRANITE-SURFACE-PLATE-4401-2418/232582275777?epid=2079177116&hash=item3626fbe2c1:g:M9sAAOSwzppaIbIq] | *Quite affordable for the precision. $116 for grade A, 24x18x3 - [https://www.ebay.com/itm/24-x-18-x-3-GRADE-A-GRANITE-SURFACE-PLATE-4401-2418/232582275777?epid=2079177116&hash=item3626fbe2c1:g:M9sAAOSwzppaIbIq] | ||
Latest revision as of 15:33, 17 March 2018
A surface plate is a precision plate for measuring, layup, and precision tool making. Granite is a common, inexpensive material for a surface plate.
https://en.wikipedia.org/wiki/Surface_plate#Accuracy_and_grade
Grades - AA is under 5/100 of a thousandth accuracy per foot. Tool room grade B is 0.0002 (5 micron).
Comparison
- Surface grinding - 0.001" per foot flatness (25 micron) [1]
- Precision surface grinder - 1 micron (see Air Bearings.
- Surface plate - same as precision surface grinder, as the precision surface grinder is based on surface plate
Sourcing
- Quite affordable for the precision. $116 for grade A, 24x18x3 - [2]