Calculating the depth to feed a center drill, spot drill, or countersink to machine a specific chamfer diameter on the face of a part is one of those recurring time-wasters that every programmer and machinist is familiar with.
The Drill Depth Calculator turns this into a few seconds' work.
It can also tell you how deep to send a twist drill to machine a full-diameter hole of a specific depth.
Standard shop practice for estimating the length of a drill point is to multiply the drill diameter by a constant, the value of which depends upon the included angle of the drill point. This practice is based on the notion of a perfectly sharp point, which doesn't actually exist with twist drills. It works well enough for through holes or when tolerances are loose, but could use a little help in some situations.
The Drill Depth Calculator offers more accurate calculations by allowing for the width of the chisel point on the end of the drill, which is calculated as a percentage of the drill diameter.
The Drill Depth Calculator turns this into a few seconds' work.
It can also tell you how deep to send a twist drill to machine a full-diameter hole of a specific depth.
Standard shop practice for estimating the length of a drill point is to multiply the drill diameter by a constant, the value of which depends upon the included angle of the drill point. This practice is based on the notion of a perfectly sharp point, which doesn't actually exist with twist drills. It works well enough for through holes or when tolerances are loose, but could use a little help in some situations.
The Drill Depth Calculator offers more accurate calculations by allowing for the width of the chisel point on the end of the drill, which is calculated as a percentage of the drill diameter.
The Drill Depth Calculator
Center Drill Display
Countersink Display
ME Machining Software
Tools for Metalworking Professionals
Created by
Michael Rainey
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