CHESTER Craftsman, Instruction Manual

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Characteristics of Tool Material
For efficient cutting a tool must have the following properties
:
Hot Hardness
This means the ability to retain its hardness at high temperatures. All cutting operations
generate heat, which will affect the tools hardness and eventually its ability to cut.
Strength and Resistance to Shock
At the start of a cut the first bite of the tool into the work results in considerable shock
loading on the tool. It must obviously be strong enough to withstand it.
Low Coefficient of Friction
The tool rubbing against the work piece and the chip rubbing on the top face of the tool produce heat,
which must be kept to a minimum.
Chester UK Craftsman Lathe
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