dryspin pre-loaded LC lead screw nut made of iglidur J | Thread: DST thread | RH

Clearance and vibration-reducing lead screw nuts

What is axial clearance and how can it be prevented?
Axial clearance describes 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 this, but the correct technical term is axial clearance. You can find more information on reducing axial clearance here.

Low Clearance:
Our LC lead screw nuts are all equipped with two elastomer O-rings. The functional principle is similar to that of the AB lead screw nut. However, in this case, clearance reduction can be achieved with the help of the LC lead screw nut. The O-rings apply a circumferential radial pre-tension to the thread system, which presses the lead screw nut flanks and the thread pitches of the lead screw. This ensures constant axial and radial pre-tension of the nut. The high degree of smooth operation and cost-effective acquisition are further advantages of the LC lead screw nut.

► Reduced axial clearance due to circumferential radial pre-tension
► High degree of smooth operation due to the reduction of possible vibrations
► Cost-effective alternative to the zero-backlash nut

► Available in dryspin® high helix and trapezoidal threads up to a thread diameter of 14mm
► Flange lead screw nut
► Thread direction: RH
► Material: iglidur® J

What other possibilities does the igus product range offer?
In addition to selecting the right material, a pre-tension mechanism has proven to be an effective measure for reducing undesirable axial clearance. There are three versions with pre-tension for our dryspin® high helix and trapezoidal threads: zero-backlash, low-clearance and AB lead screw nut.

^{Important note: A standard lead screw nut should always be used in applications with high load, high temperatures or in heavily contaminated environments. The reason for this is that the effect of all three principles is cancelled out by excessive load. For this reason, the maximum static axial loads are specified separately for each lead screw nut version.}