The Principles of Scientific Management
Forfatter: Frederick Winslow Taylor
År: 1919
Forlag: Harper & Brothers Publishers
Sted: New York and London
Sider: 144
UDK: 658.01 Tay
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108 THE PRINCIPLES OF SCIENTIFIC MANAGEMENT
(C) The thickness of the shaving, or, the thick-
ness of the spiral strip or band of metal which is to
be removed by the tool. The proportion is as 1 with
thickness of shaving A of an inch to 3| with thick-
ness of shaving A of an inch.
(D) The shape or contour of the cutting edge of
the tool. The proportion is as 1 in a thread tool
to 6 in a broad-nosed cutting tool.
(E) Whether a copious stream of water or other
cooling medium is used on the tool. The proportion
is as 1 for tool running dry to 1.41 for tool cooled
by a copious stream of water.
(F) The depth of the cut. The proportion is as
1 with 4-inch depth of cut to 1.36 with 4-inch depth
of cut.
(G) The duration of the cut, i.e., the time which
a tool must last under pressure of the shaving without
being reground. The proportion is as 1 when tool
is to be ground every 11 hours to 1.20 when tool
is to be ground every 20 minutes.
(H) The lip and clearance angles of the tool.
The proportion is as 1 with lip angle of 68 degrees
to 1.023 with lip angle of 61 degrees.
(J) The elasticity of the work and of the tool on
account of producing chatter. The proportion is
as 1 with tool chattering to 1.15 with tool running
smoothly.
(K) The diameter of the casting or forging which
is being cut.
(L) The pressure of the chip or shaving upon the
cutting surface of the tool.