Contact Information

Send inquires to: info@geardcon.com 

Steps for Running the Bolt Thread Identifier

1. Bring a photo into the app for processing.

1a.  Load a photo of your bolt from the Photos Library.

1b. Or, Snap a photo from inside the app.

2. Calibrate (Cal) the photo.

     2a. Tap on a point in the photo.  This could be on a ruler you have placed in the image or on the top of the bolt.

     2b. Tap on a second point.  This could be another point on the ruler or the bottom of the bolt.  You must know the distance between this point and the 1st.

     2c. Repeat tapping pairs as needed for accuracy.

2d. Select the measurement scale and increment using the Distance Scale selector button.

     2e. Enter the distance between the points.  This is the -/+ buttons.

2f. Enter the bolt type if you know it.

    2e. Go < Back.

3. The app will automatically find the bolt in the image and measure the thread pitch.

3a. A list of candidate pitches and confidence percentages will be displayed.  The best match will have the highest %.

3b. If unsuccessful, reposition the bolt or the camera and Snap again.

3c. Or if you are using a photo from the library, zoom in with Photos Edit and Load again.

3d. Repeat the Cal process for the new image.

4. Review extra  information in the Data section.

5. Save the tagged photo to the Photos Library.

Tips For A Successful Measurement

• Clean grease, rust, etc. from the thread.

• Place 1 bolt under the camera at a time.

• Remove clutter from the field of view.

• Use a high zoom factor if your camera supports it.  2X or 3X is best.

• Position the camera so the bolt fills the crosshairs.

• Or for long bolts, position the camera so the thread fills the crosshairs.

• Avoid lighting that causes shadows or glare.

• The photogrammetric calibration of the image is very important.  Two good methods to perform the calibration is to place a ruler in the photo at the same height as the top of the thread or use the length of the bolt or the length of the thread.

• Verify the auto-generated red box surrounds most of the thread, and it lays exactly over the thread edges.  An inaccurate box indicates that the AI has failed which may cause a bad measurement.

Bolts that Can Be Identified

The app can identify all common SAE-UNC (coarse), SAE-UNF (fine), and metric bolt threads.  The complete list follows:

SAE COARSE 1-8

SAE FINE   1-12

SAE FINE   1-14

SAE COARSE 3/4-10

SAE FINE   3/4-16

SAE COARSE 5/8-11

SAE FINE   5/8-18

SAE COARSE 9/16-12

SAE FINE   9/16-18

SAE COARSE 1/2-13

SAE FINE   1/2-20

SAE COARSE 7/16-14

SAE FINE   7/16-20

SAE COARSE 3/8-16

SAE FINE   3/8-24

SAE COARSE 5/16-18

SAE FINE   5/16-24

SAE COARSE 1/4-20

SAE FINE   1/4-28

SAE COARSE #10-24

SAE FINE   #10-32

SAE COARSE #8-32

SAE COARSE #6-32

SAE FINE   #6-40

M 24-3.00

M 24-2.00

M 20-2.50

M 20-1.50

M 16-2.00

M 16-1.50

M 14-2.00

M 14-1.50

M 12-1.75

M 12-1.50

M 12-1.25

M 10-1.50

M 10-1.25

M 10-1.00

M 8-1.25

M 8-1.00

M 7-1.00

M 6-1.00

M 5-0.80

M 4-0.70

M 3-0.50

Demos