Machine Screws | Thread Clearance

	Thread Clearance
	Date:


Notes

1. XXX.
2. XXX.
3. XXX.
4. XXX.

Functional Requirements

N		number of threads to remove
Thread Properties
Des			thread designation
d		mm	nominal thread diameter
p		mm	thread pitch

Countersink Method

α		°	countersink angle
h_s		mm	countersink depth
D_s		mm	countersink major diameter
Counterbore Method

h_b		mm	counterbore depth
D_b		mm	minimum counterbore diameter

Directions

These calculators are designed to resemble spreadsheet calculators that can be printed as reports for project recordkeeping. The term project, with regards to these calculators, may refer to an engineered design, homework problem, tutorial problem, hobby design or self-study. The workflow for each calculator is from top to bottom.

Select the number of threads to be removed.
Select the thread designation
Press the calculate button.
Print a report for your project recordkeeping by pressing the print button.

Assumptions

Equations

Depth of Removal
$$h_S = h_b = N \cdot p$$
Countersink Major Diameter
$$D_s = d+2h_s \cdot \tan\left(\frac{\alpha}{2}\right)$$
Counterbore Minimum Diameter
$$D_b = d+\frac{\sqrt{3}}{8p}$$

Background

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