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Calculating Time of a Peck Drilling Cycle on Milling Machine

Calculating Time of a Peck Drilling Cycle on Milling Machine

Calculating Time of a Peck Drilling Cycle on Milling Machine

I am looking for a formula to calculate the time of a peck drilling cycle. I have several deep holes to drill in a job I am quoting. I am looking for a formula that I can enter in these variables: hole depth, peck size, drilling feed rate, Rapid feed rate, clearance amount. This cycle retracts from the hole after every peck, and returns to the "clearance amount" at bottom of hole.

Example of variables:

Hole Depth: 25"
Peck Size: .125"
Drill Feed Rate: 3 Inches Per Minute
Rapid Feed Rate: 150 Inches Per Minute
Clearance Amount: .020"

See attached picture for clarification of cycle.

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