Unit One Vocab I-N Flashcards
Inclined Surface
A flat surface slanting in one direction. It will appear as an edge in one principle view, distorted in others.
Included Angle
The angle formed between one side and another, always less than 180 degrees
Isometric Drawing
A 3D pictorial drawing that has its horizontal surfaces drawn on 30 degree axis from horizontal.
Jig
A device designed to hold a part to be machined. Also positions and guides the cutting tool.
Key
A metal bar or wedge used to be secure gears or pulleys to a shaft and prevent rotary motion between two pieces.
Keyseat
An axially located grove in a shaft that positions the key.
Keyway
An axially located groove in a hub that positions the key.
Lap
To produce a surface finish by use of a soft metal impregnated with a fine abrasive powder.
Least Material Condition
When a feature contains the minimum amount of material “LMC” (max hole diameter and min shaft diameter)
Limits
The maximum and minimum permissible dimension. Arrived at by applying tolerances to basic dimension.
Linear Dimension
A dimension measured in a straight line.
Maximum Material Condition
When a feature contains the amount of material (min hole diameter and max shaft diameter) “MMC”
Neck
An external groove cut in a cylindrical piece at a change in diameter, usually where another part is to fit against a shoulder.
Nominal Size
A term used for the purpose of general identification.
Nonferrous
Metals that do not contain iron, such as brass, bronze and aluminum.
