Clearance Hole Calculator

Calculate Clearance Hole (CH)



Formula

The formula to calculate the clearance hole (CH) is:

\[ CH = \frac{DF + DH}{2} \]

Where:

What is Clearance Hole?

A clearance hole is the hole that allows a fastener to pass through without threading into the material. It is calculated based on the diameters of the fastener and its head.

Example

For example, if the diameter of the fastener (DF) is 0.5 inches and the diameter of the fastener head (DH) is 0.75 inches, the clearance hole (CH) can be calculated as follows:

\[ CH = \frac{0.5 + 0.75}{2} = \frac{1.25}{2} = 0.625 \text{ inches} \]

So, the clearance hole for these values is 0.625 inches.

Extended information about "Clearance-Hole-Calculator"

Bolt Hole Clearance Calculator

Definition: Calculate the clearance needed for a bolt hole.

Formula: \( D_c = D_b + C \)

Example: \( D_c = 10 + 1 \)

Hole to Hole Clearance

Definition: Calculate the clearance between two holes.

Formula: \( C_h = D_1 + D_2 + C \)

Example: \( C_h = 5 + 5 + 2 \)

Standard Clearance Hole Size

Definition: Determine the standard size for a clearance hole.

Formula: \( D_c = D_b + C \)

Example: \( D_c = 8 + 1.5 \)

Clearance Hole Chart Metric

Definition: Use a chart to determine the clearance hole size for metric bolts.

Formula: \( D_c = D_b + C \)

Example: \( D_c = 12 + 2 \)