Tapping
Tapping creates internal threads in a hole to allow attachment of threaded fasteners.
While the principle is simple, achieving a reliable joint in sheet metal or technical plastics requires
following several criteria: choice of thread type, engagement depth, minimum
distances between holes, and matching material thickness to thread depth.
Holes are machined at the same time as the profile, either by laser or CNC router, and threads are
made in a subsequent step.
Our application automatically filters available thread sizes according to material,
thickness and required clearances relative to other elements.
Thread Engagement
Thread engagement represents the percentage of screw threads that properly mesh with
the tapped hole threads. To ensure required mechanical strength, tension and
shear factors must be considered according to application. Adequate engagement ensures forces are
distributed evenly across multiple threads, avoiding stress concentration.
Thread Pitch and Standards
Thread pitch indicates the number of threads in a given space. We support three systems:
- SAE: Format ½-20 (½" diameter, 20 threads/inch)
- Metric: Format M10-1.5 (10 mm diameter, 1.5 mm between threads)
- ANSI: Format 10-32 (standardized size 10, 32 threads/inch)
Coarse vs Fine Thread
Coarse threads have a wider pitch (fewer threads per inch), while fine threads
have a reduced pitch (more threads). Coarse threads are more common and more resistant to
stripping. Fine threads offer a more precise fit but require greater engagement
depth and are more sensitive to galling during high-speed tightening.
For thin sheets or when direct tapping is impractical, use a self-clinching nut
or other type of insert from the hardware section. Tapped parts may have a slight
cutting oil film around holes. All threads are right-hand, made perpendicular, through full thickness.