stiffness
1. Ability of a material or part to resist elastic deflection. 2. The rate of stress with respect to strain; the greater the stress require…
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Glossary Terms
straight oil
Cutting fluid that contains no water. Produced from mineral, vegetable, marine or petroleum oils, or combinations of these oils.
straight-cut system
NC system wherein tools move at either 45° or 90° angles to the coordinate axes. Used in turning shoulders or milling rectangular shapes; n…
strain
Measure of the relative change in the size or shape of a body. Linear strain is the change per unit length of a linear dimension. True stra…
lathe bit (lathe tool)
Cutting tool for lathes and other turning machines. Normally a single-point cutting tool, square in cross section and ground to a shape sui…
lathe turning
Machining operation in which a workpiece is rotated, while a cutting tool removes material, either externally or internally.
lay
Direction of the predominant surface pattern, which is determined by the production method. See flows; roughness; waviness.
layout
Use of scribers, ink and prick punches to create a part outline that machinists use to visually check part shape during machining of protot…
lead angle
Angle between the side-cutting edge and the projected side of the tool shank or holder, which leads the cutting tool into the workpiece.
lean manufacturing
Companywide culture of continuous improvement, waste reduction and minimal inventory as practiced by individuals in every aspect of the bus…
linear motor
Functionally the same as a rotary motor in a machine tool, a linear motor can be thought of as a standard permanent-magnet, rotary-style mo…
lip angle
Included angle between a cutter’s tooth and relieved land.