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Trapezoidal Screws and Leadscrews

We manufacture your individual leadscrews based on your technical drawing. Trapezoidal screws convert circular movement into linear movement. A cross-section of this kind of thread corresponds to an isosceles trapezoid with an angle of 15°. This results in a flank angle of 30°.

We manufacture:

  • Single-start and multi-start ISO trapezoidal screws according to DIN 103
  • Flat metric trapezoidal screws according to DIN 380
  • Rounded trapezoidal screws according to DIN 30295
  • Your ACME trapezoidal screw according to ANSI / ASME B1.5-1977
  • Stub ACME or flat trapezoidal leadscrews according to ANSI / ASME B1.8-1977

We are also able to manufacture any trapezoidal threads or your individual leadscrew according to any other international standard required, including petroleum industry standards. We can normally construct trapezoidal screws up to 7,500 mm in length in one piece. If you require a leadscrew longer than 7,500 mm, we can supply them by combining multiple individually manufactured sections. The longest leadscrew we manufactured was over 20m long.

Trapezoidal threads

Trapezoidal Screws at Work

A trapezoidal thread is a moving drive thread and has to endure a high friction rate. This usually means the threaded part of the screw is self-locking and therefore has the advantage that it does not have to be secured separately in a resting position. Trapezoidal screws are used in various ways, and can be used:

  • as feedscrews in laboratory and life sciences equipment
  • as lifting screws or power screws in heavy lifting applications often combined with a load and safety nut
  • as leadscrews for the transmission of motion and power in machine tools
  • for exerting heavy force: e.g. in mechanical presses
  • for conveying and squeezing materials: e.g. in screw conveyors, injection moulding machines or screw pumps
  • for linear motion applications, with slower rotational speeds and heavy load requirements
  • as leadscrews for bidirectional motion loads
  • as multi-start trapezoidal screw to transform smaller radial movements into large axial movements

Your Tailor Made Trapezoidal Screw

In addition to standard trapezoidal threads and matching trapezoidal thread nuts, we also manufacture special threads with measurements that deviate from standard sizes. These come ready to install with the corresponding nuts, and including all the necessary milling and turning operations, as well as quenching and surface treatments. If you need a trapezoidal screw with multi-start threads, this is also possible, with 2, 3, 4, 30 starts or any number of starts your application requires. This differentiates us from other leadscrew manufacturers – we focus on your individual needs.

Trapezoidal screw threads

Technical Information on Trapezoidal Threads

Here are the nominal dimensions for various thread profiles and the nominal dimensions for the metric ISO trapezoidal threads according to DIN 103. You will also find a sample technical drawing depicting one of our trapezoidal threads:

Trapezoidal Threaded Spindles »Download PDF
Multi-start metric trapezoidal threads »Download PDF
Trapezoidal Threads - Trapezoidal Screw Threads

How to Get Your Custom-made Trapezoidal Screw

Just give us the specifications you want – that’s really all we need! As a leadscrew manufacturer, we have specialized in the production of highly individual designs. You can leave the technical conversion of your vision into an actual finished product to us. Simply send us a technical drawing or rough sketch with some dimensions and we will do the rest.