Lead Screws

Lead Screw Thread Forms

Lead Screw, Trapezoidal Thread, Machine Screw

Conventional Lead Screws are available in many different thread forms, including Trapezoidal, ACME, Square, Coarse, Diamond, Buttress, Sharp, Knuckle and many more

Our expertise allows us to offer the best solution for each customer’s application requirements whether using standard or special designs. By offering the options of Whirled Screw Thread, Rolled Screw Thread and Ground Screw Thread.

Key Features

Multi start threads with 1, 2, 3, up to 50 threads
Variable pitch threads
Screw lengths from 0.01m up to 20m
Screw diameters from 10mm to 300mm
Internal screw threads up to 2000mm long
Customer specific thread profiles, including non-standard flank angles
End machining of the lead screw to suit your exact needs
Standard, tempered and special materials
Heat treatments up to 8m in length
Surface coatings and treatments
Large variety of material grades available including stainless steel
Small volume prototype batches and high volume production available

Thread Forms

Trapezoidal Threads

Take advantage of the screws regularly used in Power Jacks own machine screw jacks and linear actuators. Our range of trapezoidal lead screws is available in our own industrial standard or to German standards DIN 103 and DIN 380 for flat, metric trapezoidal threads and DIN 30295 for rounded trapezoidal threads. We also offer trapezoidal thread forms to other international standards such as ACME and Stub ACME and those to petroleum industry standards. Single or multi start screw threads are available.

Sharp Threads

For self-locking threads generally used in fastening systems we offer a wide range of single-start and multi-start ISO-metric sharp threads for V-threads to German standard DIN 13 or UNC, UNF and Whitworth standards.

Buttress Threads

Buttress threads (saw thread or breech-lock thread from) designed for extremely high single direction axial loads for applications such as presses, lifting systems and chucks for turning & milling centres. The range includes single-start and multi-start ISO-metric buttress threads according to German standards DIN 513, DIN 20401, DIN 2781 and DIN 6063. Other international standards available on request.

Knuckle Threads

The round shape of our knuckle threads makes them insensitive to dirt and damage. Suitable for applications like railway carriage brakes & clutches, large valves and gates. This range of threads includes single-start and multistart ISO-metric and imperial knuckle threads to the German standards DIN 405, DIN 15403 and DIN 20400.