What should you do in the event of unwanted axial clearance?

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
 

Yellow = Axial clearance

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
 

Yellow = Axial clearance

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
 

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