SFY5050 7.938mm Milled Mute Self Lubricating Heavy Duty Ball Screw
The SFY5050 7.938mm Milled Mute Self Lubricating Heavy Duty Ball Screw from ZLV is a top-tier mechanical component that optimizes and facilitates precision linear movement in various applications. This product is a remarkable combination of advanced technology and robust materials, allowing it to offer a superb performance even in demanding environments.
Specifications
Please refer to the following table for a detailed overview of the SFY5050 Ball Screw’s product parameters:
| Parameters | Specifications |
|---|---|
| Model | SFY5050 |
| Shaft Diameter | 50 mm |
| Lead | 50 mm |
| Steel Ball Diameter | 7.938 mm |
| Nut Size | 90(D) , 135(A) , 20(B) , 117(L) , 112(W) , 92(H) mm |
| Flange Size | 14(X) mm |
| Tapping Hole Size | M6 |
| Load | 7220 Ca |
| Weight (Screw Rod) | 1.58 kg/m |
| Weight (Nut) | 0.3 kg/pcs |
| Unit Price (Screw Rod) | 65 USD/m |
| Unit Price (Nut) | 16 USD/pcs |
Key Features
- Low Friction Loss and High Transmission Efficiency: The SFY5050 Ball Screw has several rolling balls between its screw shaft and nut, which leads to a higher transmission efficiency. This feature significantly reduces the drive torque to less than 1/3 compared to traditional sliding screw pairs, which is beneficial for energy saving.
- High Precision: With the use of world-leading manufacturing equipment, strict controls over temperature and humidity, and robust quality management, the SFY5050 Ball Screw guarantees high precision in its operation.
- High-Speed Feed and Micro Feed: Given that the SFY5050 Ball Screw utilizes ball movement, it exhibits minimal starting torque, eliminating the crawling phenomenon observed in sliding motion. This feature ensures precise micro feeding.
- High Axial Rigidity: The SFY5050 Ball Screw can be applied with preload, leading to higher rigidity. This is achieved by applying pressure to the balls, which enhances the rigidity of the nut section when the ball screw is actually used in a mechanical device.
- Non-Self-Locking and Reversibility: Unlike other mechanical devices, the SFY5050 Ball Screw is non-self-locking, exhibiting reversible transmission characteristics.
Composition and Categories
The ball screw consists of a screw, nut, steel balls, pressure plate, reverser, and dustproof device.
Ball screws can be categorized as:
- Self-lubricating Ball Screw: This type has a removable oil-removal device, reducing the cost of oil change and waste oil disposal.
- Mute Ball Screw: This type uses a special groove ball spacer to suppress noise generated by collisions between balls, offering smoother and quieter operation.
- High-Speed Ball Screw: Characterized by high acceleration, high rigidity, high-speed feed, low vibration, and low noise. It is used in areas like rapid feed in machine tools, high-speed cutting in grinding centers, and high-speed longitudinal cutting centers.
- Heavy-Duty Ball Screw: Able to withstand larger axial loads, suitable for all-electric design machines, air compressors, semiconductor manufacturing devices, and forging manufacturing devices.
Parameters and Formulas
- Nominal Diameter: The outer diameter of the screw. Common specifications are 12, 14, 16, 20, 25, 32, 40, 50, 63, 80, 100, 120 mm.
- Lead: The distance the nut moves linearly for each full rotation of the screw. The lead is associated with the speed of the nut movement and the linear thrust the ball screw can provide.
The formula for speed: v = r * i, where v is the moving speed of the nut (mm/s), r is the rotational speed of the screw (r/s), and i is the lead (mm).
The formula for thrust: F = (2 * π * T * n) / i, where F is the thrust of the screw (N), T is the torque provided by the motor (N·m), n is the transmission efficiency (generally 85%-95% for ball screws), and i is the lead (m).
- Length: The total length and thread length are two concepts for the length. The thread length also includes the total length of the thread and the effective stroke, which is the maximum theoretical length of the nut’s linear movement.
- Nut Form: The nut form includes types such as round flange, single-cut flange, double-cut flange, and no flange. The difference between single and double nuts is that the latter can adjust preload and is approximately double the price and length of the former.
- Accuracy: The accuracy of the ball screw is classified into grades such as P1, P2, P3, P4, P5, P7, P10, and others depending on the region.
