Learn/Drafting/Solid Modeling Tools
Thread
TUpdated v2.3.6At a glance
- 40+ standard thread series: UNC, UNF, Metric, ACME, NPT, and more
- Auto-matches series and pitch to the cylinder diameter you click
- Fit classes: 1A, 2A, 3A — right or left hand
- Cosmetic mode (annotation metadata) or Modeled mode (helical cut geometry)
The Thread tool (T) applies threads to any cylindrical face — a bolt shank, a bored hole, or a
turned feature. Click a cylinder and JetCad3 reads its diameter and suggests matching sizes from the
selected series automatically.
Cosmetic vs modeled
Cosmetic threads attach the thread spec to the face as metadata: fast, light, and what you want for drawings and documentation. Modeled threads cut real helical geometry into the part — built on exact helical surfaces, a typical bolt or tapped hole computes in well under a second and produces a clean, valid solid you can export or 3D print.
Standards
- UNC, UNF, and the full inch series with 1A/2A/3A fit classes
- Metric coarse and fine
- ACME and other trapezoidal forms
- NPT tapered pipe threads — modeled on the correct cone angle, 1/8-27 through 2-11.5
- Optional rounded crest form for modeled threads
- Right-hand or left-hand, on external or internal faces
Tips
- Pick the series first, then click the face — the size list narrows to diameters near the cylinder.
- Threads live in the feature history like everything else: edit the feature to change series, size, fit, or handedness later, and downstream features rebuild.