Drill Point Angle for given Length of Approach Calculator

✖Diameter of drill bit used in Langefors’ Formula for calculating burden.ⓘ Diameter of drill bit [D]			+10% -10%
✖Approach Distance is the minimum distance travelled by the Cutting Tool to reach full Cutter Depth from its first engagement with the Workpiece.ⓘ Approach Distance [A]			+10% -10%

✖Drill Point Angle is the angle measured between the two opposite cutting edges of a Drill Bit at the top of the Flank.ⓘ Drill Point Angle for given Length of Approach [θ]

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Formula

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Drill Point Angle for given Length of Approach

Formula

`"θ" = 2*atan(0.5*"D"/"A")`

Example

`"135°"=2*atan(0.5*"60.3553mm"/"12.5mm")`

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Drill Point Angle for given Length of Approach Solution

STEP 0: Pre-Calculation Summary

Formula Used

Drill Point Angle = 2*atan(0.5*Diameter of drill bit/Approach Distance)
θ = 2*atan(0.5*D/A)
This formula uses 2 Functions, 3 Variables

Functions Used

tan - The tangent of an angle is a trigonometric ratio of the length of the side opposite an angle to the length of the side adjacent to an angle in a right triangle., tan(Angle)
atan - Inverse tan is used to calculate the angle by applying the tangent ratio of the angle, which is the opposite side divided by the adjacent side of the right triangle., atan(Number)

Variables Used

Drill Point Angle - (Measured in Radian) - Drill Point Angle is the angle measured between the two opposite cutting edges of a Drill Bit at the top of the Flank.
Diameter of drill bit - (Measured in Meter) - Diameter of drill bit used in Langefors’ Formula for calculating burden.
Approach Distance - (Measured in Meter) - Approach Distance is the minimum distance travelled by the Cutting Tool to reach full Cutter Depth from its first engagement with the Workpiece.

STEP 1: Convert Input(s) to Base Unit

Diameter of drill bit: 60.3553 Millimeter --> 0.0603553 Meter (Check conversion here)
Approach Distance: 12.5 Millimeter --> 0.0125 Meter (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

θ = 2*atan(0.5*D/A) --> 2*atan(0.5*0.0603553/0.0125)

Evaluating ... ...

θ = 2.35619403258361

STEP 3: Convert Result to Output's Unit

2.35619403258361 Radian -->134.999973780976 Degree (Check conversion here)

FINAL ANSWER

134.999973780976 ≈ 135 Degree <-- Drill Point Angle

(Calculation completed in 00.004 seconds)

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Created by Kumar Siddhant

Indian Institute of Information Technology, Design and Manufacturing (IIITDM), Jabalpur

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< 8 Drilling Operation Calculators

Material Removal Rate during Drilling Operation using Feed

Go Material Removal Rate in Drilling = pi*(Machine Surface Diameter^2)*Feed Rate in Drilling Operation*Rotational Frequency of Tool/4

Material Removal Rate during Drilling Operation when Enlarging Existing Hole

Go Material Removal Rate = pi*((Machine Surface Diameter^2)-(Work Surface Diameter^2))*Feed Speed/4

Diameter of Drill Bit given Length of Approach

Go Diameter of drill bit = 2*Approach Distance/tan((pi/2)-(Drill Point Angle/2))

Material Removal Rate during Drilling Operation

Go Material Removal Rate in Drilling = pi*(Machine Surface Diameter^2)*Feed Speed/4

Machining Time for Drilling Operation

Go Machining Time = Length of Cut/(Feed Rate*Rotational Frequency of Drill-bit)

Length of Cut using Machining Time

Go Length of Cut = Feed Rate*Machining Time*Rotational Frequency of Workpiece

Drill Point Angle for given Length of Approach

Go Drill Point Angle = 2*atan(0.5*Diameter of drill bit/Approach Distance)

Length of Approach for Drilling Operation

Go Approach Distance = 0.5*Diameter of drill bit*cot(Drill Point Angle/2)

Drill Point Angle for given Length of Approach Formula

Drill Point Angle = 2*atan(0.5*Diameter of drill bit/Approach Distance)
θ = 2*atan(0.5*D/A)

which are the Common Drill Point Angles?

The point angle is located on the head of the twist drill. The most used Drill Point Angles are:
1. 90° - for Softer Materials
2. 118° - for Soft to Medium Hard Material
3. 135° - for Harder Materials

How to Calculate Drill Point Angle for given Length of Approach?

Drill Point Angle for given Length of Approach calculator uses Drill Point Angle = 2*atan(0.5*Diameter of drill bit/Approach Distance) to calculate the Drill Point Angle, The Drill Point Angle for given Length of Approach is a method to determine the angle made by the two major cutting edges of a drill bit at its head when the perpendicular height of the tip-cone is known. Drill Point Angle is denoted by θ symbol.

How to calculate Drill Point Angle for given Length of Approach using this online calculator? To use this online calculator for Drill Point Angle for given Length of Approach, enter Diameter of drill bit (D) & Approach Distance (A) and hit the calculate button. Here is how the Drill Point Angle for given Length of Approach calculation can be explained with given input values -> 8114.823 = 2*atan(0.5*0.0603553/0.0125).

FAQ

What is Drill Point Angle for given Length of Approach?

The Drill Point Angle for given Length of Approach is a method to determine the angle made by the two major cutting edges of a drill bit at its head when the perpendicular height of the tip-cone is known and is represented as θ = 2*atan(0.5*D/A) or Drill Point Angle = 2*atan(0.5*Diameter of drill bit/Approach Distance). Diameter of drill bit used in Langefors’ Formula for calculating burden & Approach Distance is the minimum distance travelled by the Cutting Tool to reach full Cutter Depth from its first engagement with the Workpiece.

How to calculate Drill Point Angle for given Length of Approach?

The Drill Point Angle for given Length of Approach is a method to determine the angle made by the two major cutting edges of a drill bit at its head when the perpendicular height of the tip-cone is known is calculated using Drill Point Angle = 2*atan(0.5*Diameter of drill bit/Approach Distance). To calculate Drill Point Angle for given Length of Approach, you need Diameter of drill bit (D) & Approach Distance (A). With our tool, you need to enter the respective value for Diameter of drill bit & Approach Distance and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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