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Technical Basics
Basic design
Rondo screws are a true alternative to conventional trapezoidal screws. They deliver outstanding efficiency and quiet running due to their round thread profile.Made of steel, the lead screws are combined with plastic flange nuts (outer dimensions equal those of standard
Speedy flange nuts).
Materials
Screw- stainless: steel X20Cr13 (stainless) material N° 1.4021
- other materials on request
Nut
-standard: EX100 white
-other materials on request
Temperature range
EX100 nuts: –40 to +60 °CNut design
One standard nut design has been defined:
Of course, any other application-specific nut designs can be supplied on request including injection-molded solutions.
Lead accuracy
Standard- G9 = ≤ 0,1 mm/300 mm (according to DIN 69051)
On request
- other lead accuracies
Duty cycle
Load rates, lubrication notice and basic calculation with load factor fL are based on a duty cycle of 10 % for a Rondo made of standard materials.Factory length
In general, Eichenberger screws are available as threaded rods, approx. 3 m long. Upon request, lengths up to 6 m are available, depending on diameter and supply market situation.Lead screw ends
Speedy lead screws are cut to the desired length without special machining (standard).Upon request, a so-called standard screw end journal with three turned bearing seats (see figure) is available.
Dimensions are as per customer specifications.
Handling
Rondo screws are precision parts (non-hardened) and must be protected from shock, dirt or moisture when transported or stored. Please do not unpack until ready for use.Please check for cleanness when mounting the lead screw unit. Dirt or foreign matter on the thread may cause exces-sive wear.
Please consult lubrication recommenda-tion before mounting or operating Speedy lead screws.
Radial- und Momentenbelastungen
Im Betrieb auf die Mutter einwirkende Radial- oder Momentenbelastungen führen zu einer Überbelastung einzelner Kontaktflächen, was die Lebensdauer der Spindeleinheit massiv beeinträchtigt. Es ist daher auf einen fachgerechten Einbau der Spindeleinheit und die Einhaltung aller relevanten Form- und Lagetoleranzen zu achten.Lubrication
In some cases, a single lubrication with grease or oil is sufficient. However, any lubrication cycle depends on the application environment.Bronze nuts have to be lubricated regularly.
Lubricant used by manufacturer:
- Klüber Microlube GBU Y 131.
