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Lathe Machine Questions

Cutting speed is defined as the rate at which the workpiece passes the tool on a lathe or milling machine, or the distance traveled by the drill circumference per minute on a drill press. Feed refers to the distance the tool advances per revolution on a lathe or the distance the workpiece moves into the cutter per minute on a milling machine. Formulas for calculating cutting speed and feed involve factors like cutter diameter, revolutions per minute, and chip size.

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374 views1 page

Lathe Machine Questions

Cutting speed is defined as the rate at which the workpiece passes the tool on a lathe or milling machine, or the distance traveled by the drill circumference per minute on a drill press. Feed refers to the distance the tool advances per revolution on a lathe or the distance the workpiece moves into the cutter per minute on a milling machine. Formulas for calculating cutting speed and feed involve factors like cutter diameter, revolutions per minute, and chip size.

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upenderdhull
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Q6: Define the cutting speed and feed for the following.

The Lathe:
Cutting Speed:
Cutting speed is how fast the metal comes into contact with the tool at the cutting
point. On a lathe, it is the rate at which the surface of the job passes the cutting tool.
This takes into account the diameter of the job.
The general formula for a cutting speed is as follows:

Feed:
The feed of a lathe may be defined as the distance the cutting tool advances along
the length of the work for every revolution of the spindle.

Milling Machine:
Cutting Speed:
Cutting speed is how fast the metal comes into contact with the tool at the cutting
point. On a milling machine, it is the rate at which the milling cutter moves past the
stock. This takes into account the diameter of the cutter.
The general formula for a cutting speed is as follows:

Feed:
Milling machine feed may be defined as the distance in inches (or millimeters) per
minute that the work moves into the cutter. It is measured in in./min or mm/min.
The formula to calculate feed for a milling machine is:
Feed = no. of cutter teeth x chip/tooth x cutter r/min
Feed (in./min) = N x CPT x r/min
where,
N = number of teeth in the milling cutter
CPT = chip per tooth for a particular cutter and metal, as given in table
r/min = Revolutions per minute of the milling cutter

Drill Press:
Cutting Speed:
It is the distance that a point on the circumference of a drill will travel in 1 min.
The general formula for a cutting speed is as follows:

where, r/min = Revolutions per minute


D = the diameter of the drill being used

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