Product
Ball screws for low speed and precise positioning
Ball screws for low speed and precise positioning
These ball screws are used in applications in which high accuracy and low speed of positioning are required. They are suitable especially for precise machine tools.
The shaft thread is generally ground. These ball screws are only available with double preloaded nuts AP+A, or A+A. The ball screws are offered in IT1 precision class and for their maximum thread length the following formula should be kept: Lz = 20×Do. The load capacities of these ball screws are reduced to 70% of the load capacity of standard ball screws due to the reduction of the number of balls in the nuts.
The main advantages of these ball screws are their high accuracy and smooth run. Furthermore their high flexibility allows the production of ball screws exactly according to the customer’s needs.
For this type of ball screws the following nut types are available:
Characteristics:
These ball screws do not have a separate technical parameter table and are delivered as customized solutions with respect to the limitations mentioned above.
Example of designation: K40x5 – 4+4/AP+A PP/2 (ball screw with diameter 40 mm, with pitch 5 mm, 4 working threads, preloaded
double nut AP+A, precise positioning design, flange type 2)
Ball screws for low speed and precise positioning : www.ks-kurim.cz/en/ball-screws/ball-screws-for-low-speed-and-precise-positioning/
These ball screws are used in applications in which high accuracy and low speed of positioning are required. They are suitable especially for precise machine tools.
The shaft thread is generally ground. These ball screws are only available with double preloaded nuts AP+A, or A+A. The ball screws are offered in IT1 precision class and for their maximum thread length the following formula should be kept: Lz = 20×Do. The load capacities of these ball screws are reduced to 70% of the load capacity of standard ball screws due to the reduction of the number of balls in the nuts.
The main advantages of these ball screws are their high accuracy and smooth run. Furthermore their high flexibility allows the production of ball screws exactly according to the customer’s needs.
For this type of ball screws the following nut types are available:
- Double preloaded nuts
Characteristics:
- Precise ground positioning screws with IT1 precision class
- Standard geometric and working accuracy according to DIN ISO 3408
- Reduced tolerance of Tp values (usually by 10 to 15% compared to the standard)
- Delivered with customized preload
- Diameters from 20 to 80 mm
- Recommended pitches 5 and 10 mm, thread lengths to 20×Do
- Precision class IT1
- Do×n = 80,000, efficiency 94–97% (according to thread pitch and lubricant)
- Minimum strength of the shaft material Rm= 650MPa, functional surfaces of the shaft and nut hardened to 58-60HRC
- Working temperature -20 to +60°C (according to lubricant type)
- Lubricants with increased resistance to unstable high pressure are recommended
- Precise machine tools – grinding machines, EDM and laser machines
These ball screws do not have a separate technical parameter table and are delivered as customized solutions with respect to the limitations mentioned above.
Example of designation: K40x5 – 4+4/AP+A PP/2 (ball screw with diameter 40 mm, with pitch 5 mm, 4 working threads, preloaded
double nut AP+A, precise positioning design, flange type 2)
Ball screws for low speed and precise positioning : www.ks-kurim.cz/en/ball-screws/ball-screws-for-low-speed-and-precise-positioning/
Price of the Product
Price not indicated
