Precision Lead Screws & Nuts 

Precision Lead Screws (commonly called Power Screws or Translation Screws) are designed for high-precision actuation. Lead Screws use helical threads to translate rotary motion into linear movement. These mechanisms are used within a wide range of appliances, including printers, lathes, CNC machines and robotics.

Accu supply a large selection of thread types for Lead Screws and Nuts, with ACME and trapezoidal tooth profiles. A selection of Lead Screw Nuts is also manufactured, including flanged and unflanged varieties, and are available with and without anti-backlash capabilities.

Imperial ACME Lead Screws and Nuts

ACME Imperial Lead Screws are one of the most commonly used forms of Lead Screw. These screws feature a trapezoid-shaped tooth, with a tooth angle of 29°. ACME Lead Screws have a more acute tooth angle than Trapezoidal Lead Screws, which results in greater efficiency, but slightly decreased load-bearing capabilities.

Metric Trapezoidal Lead Screws and Nuts

Accu's Trapezoidal Metric Lead Screws feature a trapezoidal tooth profile, and a tooth angle of 30°. Trapezoidal Lead Screws have a similar tooth shape, but a shallower tooth angle than ACME Lead Screws, which creates stronger teeth with greater load-bearing capabilities.

What are the advantages of using Lead Screws?

Accu Lead Screws have a number of key advantages over alternative power transmission methods:

Ultra-High Precision

Accu's High Precision Lead Screws can be precisely operated to achieve lead accuracies of up to 0.0001mm/mm. This highly accurate linear motion makes Lead Screws ideal for applications where precision is critical.

Large Load-Carrying Capacity

Lead Screws are capable of supporting very large axial loads. This capability is further enhanced by using Lead Screws which feature multiple thread starts.

Large Mechanical Advantage

Due to their unique design, Lead Screws are able to exert high levels of torque with relatively little breakaway torque. 

Compact and Simple Design

Lead Screw mechanisms have only a small number of essential components, and take up very little space within an assembly, this makes them simple to design and install, and means that they can be utilised in environments where space is limited.

High Efficiency Options

Although Lead Screws often sacrifice efficiency for their many mechanical advantages, Accu offers a large selection of Lead Screw components which are specially designed to enhance efficiency. Accu's ACME Lead Screws and Nuts section includes a selection of Self-Lubricating Turcite X ACME Lead Screw Nuts, which can greatly increases the running efficiency of a Lead Screw mechanism. Self-Lubricating TFE Coatings are also available on ACME Lead Screws.