- Spherical Roller Bearings[7]
- Wood Router[7]
- Other Bearings[8]
- Pillow Block Bearings[10]
- Deep Groove Ball Bearings[10]
- Ball Screws[7]
- Self-aligning Ball Bearings[7]
- Needle Bearings[10]
- Angular Contact Ball Bearings[7]
- Thrust Ball Bearings[7]
- Special Bearings[4]
- Sliding Bearings[3]
- Rod End Bearings[7]
- Taper Roller Bearings[7]
- Other Roller Bearings[1]
- Other Ball Bearings[1]
- Cylindrical Roller Bearings[10]
- Other Machine Tools Accessories[1]
- Linear Bearings[6]
- Linear Guides[7]
- Thrust Roller Bearings[1]
- Engine Parts[1]
- Electronic & Instrument Enclosures[5]
- Contact Person : Mr. Zhang Houcai
- Company Name : Jinan Dunmu Electrical And Mechanical Co., Ltd.
- Tel : 86-0531-88638467
- Fax : 86-0531-88638467
- Address : Shandong,Jinan,Flyover District of Jinan City, Shandong Province, Alexandra Road, a layer of 198 A, Room 105
- Country/Region : China
- Zip : 250031
supply SFU2020 single ball screw made in china
SFU2020 single ball screw made in China
All the above sizes available.
Ball screws are used in aircraft and missiles to move control surfaces, especially for electric fly by wire. They are also used in machine tools, robots and precision assembly equipment. High precision ball screws are used in steppers for semiconductor manufacturing.
In contrast to conventional leadscrews, ballscrews tend to be rather bulky, due to the need to have a mechanism to re-circulate the balls.
To maintain their inherent accuracy and ensure long life, great care is needed to avoid contamination with dirt and abrasive particles. This may be achieved by using rubber or leather bellows to completely or partially enclose the working surfaces. Another solution is to use a positive pressure of filtered air when they are used in a semi-sealed or open enclosure.
While reducing friction, ball screws can operate with some preload, effectively eliminating backlash (slop) between input (rotation) and output (linear motion). This feature is essential when they are used in computer-controlled motion-control systems, e.g. CNC machine tools and high precision motion applications (e.g. wire bonding).
Depending upon their lead angle, ball screws can be back-driven due to their low internal friction (i.e. the screw shaft can be driven linearly to rotate the ball nut). They are usually undesirable for hand-fed machine tools, as the stiffness of a servo motor is required to keep the cutter from grabbing the work and self feeding, that is, where the cutter and workpiece exceed the optimum feedrate and effectively jam or crash together, ruining the cutter and workpiece. Cost is also a major factor as Acme screws are cheaper to manufacture.
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supply SFU2020 single ball screw made in china
