Design guide for components with threads and counterbores
Useful information about the threading and counterboring process, how to properly prepare your files for them, capabilities, and limitations of our process.
Content
Threading
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Threading process >Threading process >
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Preparing your file for threading >Preparing your file for threading >
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Capabilities of the threading process >Capabilities of the threading process >
Counterboring
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Counterboring process >Counterboring process >
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Preparing your file for counterboring >Preparing your file for counterboring >
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Capabilities of the counterboring process >Capabilities of the counterboring process >
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Threading Process
Threading of a sheet metal component involves creating a thread within a circular hole. This is achieved using specialized tools like taps or dies. This process facilitates the secure joining of components through screws or other threaded elements.
> Preparing your file for threading
Properly preparing your files for threading not only optimizes the process but can also significantly accelerate the production time.
Preparation of 2D files with threading
To correctly generate the 2D file intended for producing a flat part with threading, it’s essential to draw the threaded hole as if it were a conventional hole, without including marks or indications about the threading. The diameter of this hole should be correct for creating the thread, known as the “pre-thread hole” (measured according to the thread process capabilities table below). Next, select the threading process, specifying both the Thread Size and Quantity, to ensure precise and efficient manufacturing. You can add comments or documents to provide more information about which holes need threading.
Preparation of 3D files with threading
To correctly generate the 3D file intended for producing a flat or folded part with threading, it’s essential to draw the threaded hole as if it were a conventional hole, without including the 3D thread features. The diameter of this hole should be correct for creating the thread, known as the “pre-thread hole” (measured according to the thread process capabilities table below). Next, select the threading process, specifying both the Thread Size and Quantity, to ensure precise and efficient manufacturing. You can add comments or documents to provide more information about which holes need threading.
> Capabilities of the threading process
At LaserBoost, we utilize the thread tapping method, employing specialized machinery and a specific configuration for each successful threading process.
Our thread production model adheres to the Metric system with standard pitch.
To accurately execute threading on a part with a specific metric measurement, it’s necessary to pre-drill a hole with a precise diameter. Additionally, a recommended minimum material thickness should be taken into consideration. The details of these dimensions are presented in the following table:
Thread Size (Normal Metric)
Thread Size (Normal Metric)
Recommended minimum sheet thickness (mm)
M2
1.60
1.00
M2.5
2.00
1.20
M3
2.50
2.00
M4
3.30
3.00
M5
4.20
3.00
M6
5.00
4.00
M8
6.75
5.00
M10
8.50
6.00
M12
10.20
8.00
For example, to produce 4 M5 metric holes in your part, you should draw those holes in your design with a measurement of ø4.2mm. Select the Threading option, specify M5 in the Thread Type, and enter 4 as the Quantity. We recommend using a material with a minimum thickness of 3mm.
If your pre-thread hole is not correctly sized for the requested metric thread, we will ensure proper dimensioning.
The recommended minimum sheet thickness measurements have been calculated to leave at least 3 complete thread turns. We can perform threading on sheet thicknesses below the indicated minimum measurements if the customer desires.
Counterboring Process
Counterboring is used to create a tapered surface around a circular hole. This allows the head of a countersunk screw to sit flush with the surface, providing a smooth and uniform finish.
> Preparing your file for counterboring
Properly preparing your files for countersinking not only optimizes the process but can also significantly accelerate your production time.
Preparation of 2D files with countersinking
To correctly generate the 2D file intended for producing a flat part with countersinking, you should draw the hole with the smaller diameter in the countersunk shape. Next, select the countersinking process, specifying both its size and quantity, to ensure precise and efficient manufacturing. You can add comments or documents to provide more information about which holes require countersinking.
Preparation of 3D files with countersinking
To correctly generate the 3D file intended for producing a flat or folded part with countersinking, you should draw the hole with the smaller diameter in the countersunk shape. The 3D model should not include the chamfer shape. Next, select the countersinking process, specifying both its size and quantity, to ensure precise and efficient manufacturing. You can add comments or documents to provide more information about which holes require countersinking.
> Capabilities of the counterboring process
At LaserBoost, we perform countersinking using precision CNC machines. Your countersinks will be clean and free of burrs.
We offer various methods for countersinking:
- The Through Countersink mode applies the countersink across the entire material thickness at a 90º angle.
- The Screw Countersink mode (M2, M2.5, M3, etc.) applies the countersink just enough to hide the head of a countersunk screw of the selected size according to the general DIN standard (e.g., DIN 7991 or DIN 965, among others).
- The Custom Countersink mode is done according to the dimensions you need, with a larger diameter (ø) for the chamfer, at a 90º angle.
All countersinks are performed at a 90-degree angle.
Any questions? The technical team at LaserBoost is at your service to assist with your design and validate that your files are correct for placing an order. Contact us at info@laserboost.com.
About User Guides, Tolerances, and Production Capabilities at LaserBoost
It’s possible to correctly manufacture parts that do not meet the capacities announced here. However, the correct outcome of cutting and/or bending is not guaranteed by LaserBoost if the specifications stated on our website are not met. If a design does not meet any of the tolerances, capacities, or limitations announced, it may still be produced by LaserBoost at the customer’s risk. You can validate the proper manufacturability of your design before placing an order by contacting our technical team at info@laserboost.com.
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