What should you do in the event of unwanted axial clearance?
With our dryspin® lead screw nuts we can offer various different materials to suit a wide range of applications and design requirements. Using the igus® online tools will help identify the correct lead screw nut in the wide range of materials, sizes, pitches and styles.
A choice of 7 standard materials for the range of lead screw nut products with the ability to produce custom and bespoke designs igus® leadscrew nuts give the best possible solution to any application.
- High wear resistance
- Silent operation
- Lubrication and maintenance-free
Would you like more information about dryspin® lead screw nuts or do you need an individual consultation? Our experts will be happy to get in touch with you.
Contact an expert
Zero-backlash lead screw nut
► For a lifetime of minimal axial backlash► Ideal for precise positioning and
infeed movements
► More information
Buy now!
Low-clearance lead screw nut
► Ensure consistent axialand radial pretension
► Very smooth running
► More information
Buy now!
AB lead screw nut
► Pretension by means of a spring load meter► Significant reduction in self-excited
oscillations and vibrations
► More information
Buy now!
Pre-load lead screw nuts
► Maximum positioning accuracy► Ideally suited for small gradients
► Cost-effective alternative to zero backlash nut
► More information
To the online shop
What is axial clearance anyway?
Axial clearance can be used to describe the lost motion, the "dead travel", on the lead screw as a result of the gap between the lead screw and the lead screw nut. The term clearance is also often associated with it, but the correct technical term is axial clearance. It is therefore the movement of the lead screw nut in the axial direction without movement of the lead screw. Lead screw units require a minimum clearance to maintain their function. If the axial clearance is too small, the torque required to move the lead screw nut will also increase. In addition to the axial clearance caused by the manufacturing tolerances, application-specific influences must also be taken into account. In addition to thermal and hygroscopic environmental influences, the minimum clearance to be considered in the application must also take into account the friction heat generated by the application. This plays a decisive role in connection with the expansion behaviour of the polymer material used. As the axial clearance in the system can change with temperature fluctuations.What options does the igus product range offer in this case?
To reduce the unwanted axial clearance, in addition to the correct choice of material, a preload mechanism has proven to be an effective measure. There are four variants with pretension for our dryspin® high helix thread and trapezoidal threads: zero backlash, low clearance, preload and AB lead screw nut. Here you will find all the advantages and assembly instructions for our clearance-reduced lead screw nuts.For applications with high loads, high temperatures or in heavily polluted environments, a standard lead screw nut should always be used. The reason for this is that all three principles are cancelled out by too high loads. For this reason, the maximum static axial loads are specified separately for each lead screw nut model.
Information
One of the most precise solutions is the ZB lead screw nut. It consists of several components and adjusts itself to the service life. It is particularly suitable for lead screw drives with high helix threads for quick adjustment of small loads. The clearance-free principle ensures minimal clearance over the entire service life. Ideal for precise positioning and feed movements in medical, laboratory and printing technology as well as in the broad areas of bio-sciences.The lead screw nut consists of a support nut, an adjusting ring with torsion spring, a friction disc and the axial element. With the help of the torsion spring, the preload is brought into the lead screw system.
► Life-long minimum axial backlash
► Precise positioning and infeed movements
► In dryspin® and drylin® high helix thread
► Flange lead screw nut
► Thread direction: RH
► Material: iglidur® J
Buy now!
Information
Our LC lead screw nuts are all equipped with two elastomer O-rings. The functional principle is similar to the AB lead screw nut. However, with the help of the LC lead screw nut, a reduction in clearance can be achieved in this case. The O-rings apply a circumferential radial preload to the thread system, pressing the flanks of the lead screw nut and the threads of the lead screw. This ensures a constant axial and radial preload of the nut. The high operational smoothness and cost-effective purchase are further advantages of the LC lead screw nut.► Reduced axial clearance due to circumferential radial preload
► High operational smoothness due to reduction of possible vibrations
► Cost-effective alternative to zero-backlash nut
► In dryspin® high helix and trapezoidal thread up to thread diameter 14mm
► Flange lead screw nut
► Direction of thread: RH
► Material: iglidur® J
Buy now!
Information
Noise and vibrations can generally occur with the use of lead screw drives. In particular, long lead screws and long travels can cause self-induced vibrations in the systems.Due to their good sliding properties, lead screw nuts made from the tribologically optimised iglidur® materials tend to develop less noise than conventional plastics or metallic materials, such as bronze or brass.
To reduce noise, in addition to the right choice of material, a preloading mechanism is also an effective measure. In the case of the AB lead screw nut, an elastomer ring applies a force on an insert plate with a matching thread, which is pressed into the threads of the lead screw. It is important that this preload is not present over the entire length and not all around. This ensures low axial clearance in only a small range. The functional principle of this lead screw nut differs significantly from that of the zero-backlash lead screw nut.
► Reduction of noise and vibrations
► For trapezoidal threads up to thread diameter of 24mm
► Cylindrical and flange lead screw nuts
► Thread direction: RH and LH
► Material: iglidur® J and iglidur® R
Buy now!
Information
The new pre-load lead screw nut convinces with minimal axial clearance and highest positioning accuracy. It is the cost-effective alternative to the zero backlash and ideally suited for small pitches. This is the proven pre-load principle from SHT-PL. Typical applications include 3D printers.► For high helix threads up to a thread diameter of 6.35mm
► Cylindrical lead screw nut with flange
► Thread direction: right-hand thread
► Material: iglidur® J
To the online shop
Technical data
Thread | [N] | (with spring) from [Nm] | Part number |
|---|---|---|---|
| Ds6.35x2.54 | DST-JFRM-PL-0001-DS6.35X2.54 | ||
| DDST-JFRM-PL-0001-DS6.35X5.08 | |||
| DST-JFRM-PL-0001-DS6.35X6.35 |
To the dryspin lead screw technology overview page
Find everything you need here
Discover our dryspin lead screw technology, reduce time spent on design, and optimise your procurement process.► Online shop
► Configurators
► Information
► Application examples
To the overview page
Order online:
To the online shop
Configure online:
Go to the configurators
Send a request:
Go to contact request
