Thread

Select the body, click a cylinder (an outer thread) or a hole (an inner one), set the pitch, the length, the profile angle and the profile depth, press Enter.

An M30×3.5 thread over 40 mm: a real cut profile, not a drawn spiral.
An M30×3.5 thread over 40 mm: a real cut profile, not a drawn spiral.

The thread is real, not a symbol

A true helical surface is built: it is visible in a section, it goes into STEP and STL, and a pair can be checked for screwing together. The price is triangles and rebuild time — which is why threads are usually added last.

What is set

  • Pitch — the distance between turns.
  • Length — how far the thread runs along the cylinder.
  • Profile angle — 60° for a metric thread, other values for trapezoidal and the rest.
  • Profile depth — how deep it cuts.

A hint

Too much depth on a small diameter cuts the core away: the program refuses to build it, and rightly so — such a thread does not exist.

The auger is the same command, another button

The Auger button in the bar builds a helical flight on a shaft — the kind that is welded on, not a groove that is cut out. Hence the difference: a thread REMOVES material, an auger ADDS it.

You set the outer diameter, the pitch, the length, the thickness of the flight and the edge fillet — all at the geometry.

The outer diameter must be larger than the shaft: a flight that does not stand out of the shaft adds nothing, and the program says so instead of building emptiness.

That is how conveyors, extruders and feed screws are made.

Push face →