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Details and Image
Item#
Type
Model
Type No.
Version No.
Maker
Country
Material
Scale Length
Date
Condition
LAW014
Linear
10-G
Cutting Speed Calculator
1
Lawrence
USA
Boxwood w/white painted surface and printed scales
"10"
©1946
C5
Notes:
"Slide rule for calculating cutting speed in f.p.m for given drill diameter in inches millimeters, or drill size and spindle speed in r.p.m."
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Condition Code
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