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Type | Sliding Screw Transmission | Rolling Screw Transmission | Static Pressure Screw Transmission |
Characteristic | 1. High friction resistance and low transmission efficiency (normally 30%-60%). 2. Simple structure and convenient processing. 3. Easy to self-locking. 4. Stable operation, but creep may occur at low speed or fine-tuning. 5. The thread has lateral clearance, and there is an empty stroke in the reverse direction, and the positioning precision and axial rigidity are poor (the anti-backlash mechanism can improve the positioning precision). 6. Wear is relatively faster than rolling friction. | 1. Low friction resistance and high transmission efficiency (normally above 90%) 2. Complex structure, difficult to manufacture 3. With transmission reversibility (can turn rotary motion into Linear Motion). In order to prevent the screw pair reversing after being loaded, should provide an anti-reversal mechanism 4. Stable operation, no vibration when starting, no crawling at low speed 5. Adjust the nut and screw pre-tightening to obtain high positioning precision (5μm/300mm) and repeat positioning precision (1-2μm), and can improve axial rigidity 6. Long working life, not easy to break down 7. Poor impact resistance | 1. Low friction resistance, high transmission efficiency (up to 99%) 2. Complex nut structure 3. With transmission reversibility, anti-reversal mechanism should be set if necessary 4. Stable operation, no crawling phenomenon 5. No idle stroke in the reverse direction, high positioning accuracy, and high axial rigidity 6. Low wear and long working life 7. Need a set of oil supply system with stable pressure, constant temperature and high filtration requirements |
Application Example | Feed of metal cutting machine; Drive screw of indexing mechanism; Force transmission screw of friction press and jack | Metal cutting machine tools (especially machining centers, CNC machine tools, precision machine tools); Test Machinery; Drive screw and adjustment screw of the instrument; Force transmission screw for lifting mechanism and steering mechanism of automobile and tractor; Transmission screw and force transmission screw of automatic control system of aircraft, missile, ship, railway, etc. | Feed of precision machine tools and drive screw of indexing mechanism |
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