Line Conventions
This line consists of a repeating dashed line.
What is a hidden line?
This end mill has 90 degree flute spacing.
What is a 4-flute end mill?
This milling technique in which the teeth of a cutting tool advance into the work in the same direction as the feed. Also called down-milling.
What is climb milling?
This machining constant is used in machining.
What is 3.82?
ft represents this.
What is chip load?
This line consists of a repeating short, long, short, long pattern.
What is a center line?
This end mill has 120 degree flute spacing.
What is a 3-flute end mill?
This milling operation in which the work is fed into the rotation of the cutter. Also called up-milling.
What is conventional milling?
This represents "R" in RPM.
What is revolution(s)?
Calculate the following feed rate:
SFM = 200 | Dia. = 0.25"
ft = 0.005" | nt = 3
What is 46 IPM?
This line has an arrow on it pointing to a drawing attribute.
What is a leader line?
This cutting tool is used to machine a large profile on the face of a part.
What is a shell mill?
This type of milling machine in which the cutter is normally perpendicular (at a right angle) to the worktable. On many vertical milling machines, the spindle can be tilted to perform angular cutting operations.
What is a vertical milling machine?
Calculate the following RPM.
SFM = 400; Dia. = 1/4"
What is 6,112 RPM?
Calculate the following feed rate:
SFM = 900 | Dia. = 0.3125"
ft = 0.004" | nt = 2
What is 88 IPM?
This line details the overall perimeter of an object.
What is an object line?
This type of end mill is used to remove much material, similar in fashion to creating a rough draft for an English assignment.
What is a roughing end mill?
The rate at which work moves into the cutter or the cutter moves into the work.
What is feed rate?
Calculate the following RPM.
SFM = 1000; R = 1/4"
What is 7,640 RPM?
This refers to RPM in feed rate.
What is "N"?
This line has precedence over a hidden line.
What is an object line?
This device is used to hold and drive cutters on metalworking and other industrial machines.
What is an arbor?
In reference to milling machines, the distance, measured in feet or meters, that a point (tooth) on the cutter’s circumference will move in one minute. In reference to lathes, the distance the work moves past the cutting tool, expressed in feet per minute (fpm) or meters per minute (mpm). Measuring is done on the circumference of the work. In reference to drilling machines, it is the speed at which the cutting tool rotates.
What is cutting speed?
This forward slash represents what regarding rates.
What is "per"?
This is the feed rate formula.
What is fm = ft x nt x N