drylin® - trapezoidal leadscrew nuts - Assembly instruction

drylin® lead screw nuts must be secured against twisting and axial sway.

Leadscrew nuts with flange

A maximum tightening torque of 2,5 Nm applies to M6 mounting screws on flanged nuts. We recommend the securing of the mounting screws via a third medium (e.g. liquid screw locking). The use of metallic press-fit sleeves is recommended for higher tightening torques.

Cylindrical lead screw nuts

The outside diameter of the cylindrical lead screw nuts has h9 tolerance. We therefore recommend a positive fit, e.g. by employing keyways for a secure lock. When low forces are involved, field experience has also demonstrated that screw connections will work. Gluing lead screw nuts is principally not recommended. However, if lead screw nuts are nevertheless intended for gluing, suitable tests need to be performed under all circumstances.

Zero-backlash lead screw nut assembly

1. Support nut
2. Locking ring with torsion spring
3. Friction disc
4. Axial element

Using the torsion spring (2.), thread the locking ring approx. half-way onto the support nut (1.) and secure the spring tab in the bore.

Thread the locking ring to the end of the support nut to tension the torsion spring.

Position the friction disc (3.) and the axial element (4.) flush against the locking ring. Ensure that the locking ring does not rotate.

Press together the support nut (1.) and the axial element (4.) and thread the lead screw through the nut. Pre-tension the locking ring while doing so.