Advantages and features: Taiwan TBI rotary screw RFBY2020, with a diameter of 20mm and a symmetrical nut mounting hole distance of 31mm. The BI ball screw consists of a screw, nut, and ball, making it an ideal product for converting rotary motion into linear motion or vice versa
Advantages and Characteristics:The Taiwan TBI rotary screw RFBY2020 has a diameter of 20mm and a symmetrical nut mounting hole distance of 31mm. The BI ball screw consists of a screw, nut, and ball, and is an ideal product for converting rotary motion into linear motion or vice versa.
RFBY Rotary Ball Spline Size Table
| model |
axle footpath d |
guide Cheng I |
bead footpath Da |
bead circle number |
Support bearing Rating |
Nut size |
ball nut Rating |
Ca (kgf) |
Coa (kgf) |
D |
A |
B |
L |
C |
E |
J |
K |
P |
X |
W |
Y |
θ |
Ca (kgf) |
Coa (kgf) |
RFBY
02020 |
20 |
20 |
3.175 |
1.8x2 |
1066 |
2452 |
0
62
-0.007 |
78 |
0
50
-0.025 |
53.5 |
+0.025
39
0 |
11 |
7 |
34.5 |
70 |
4.5 |
31 |
M5 |
40 |
1387 |
3515 |
Characteristics of TBI ball screw RFBY2020
1. High efficiency: The TBI ball screw RFBY2020 achieves rolling friction between the screw shaft and nut through ball rolling, reducing the driving torque to less than 1/3 compared to sliding screws in the past. That is, the power required to achieve the same motion result is 1/3 of using a rolling screw. Imported TBI screws can achieve a transmission efficiency of 97%.
2. Pre tightening and high rigidity: TBI ball screws can be preloaded, which can cause the axial clearance to reach a negative value, resulting in high rigidity (by applying pre pressure to the ball inside the ball screw, in practical use in mechanical devices, the repulsive force of the ball can enhance the rigidity of the screw), and have a long service life.
3. High lifespan: The nuts of TBI ball screw RFBY2020 have screw hardness of HRC58-62 and ball hardness of HRC62-66, and they are subject to rolling friction. Therefore, with appropriate design, TBI screw can achieve high fatigue and precision lifespan
4. High precision guarantee: TBI ball screws strictly control the temperature and humidity in the factory environment for grinding, assembly, and inspection processes. Due to a sound quality management system, the accuracy is fully guaranteed. Accuracy tolerance: C10, C7, C5, C3, C2, C1- The smaller the number, the higher the accuracy.
5. Can achieve micro and high-speed feed: TBI ball screws do not produce creep phenomena like in sliding screws, so they can achieve correct micro feed; As long as the feed pulse is small enough, TBI ball screw can achieve sub micron level micro feed. Due to the low heat generation of ball screws and the ability to produce large lead screws, high-speed feed can be achieved; Under the premise of ensuring a speed lower than the critical speed of the ball screw, the large lead TBI ball screw can achieve a feed rate of 100m/min or even higher.
The Taiwan TBI rotary screw RFBY2020 has a diameter of 20mm and a symmetrical nut mounting hole distance of 31mm. The BI ball screw consists of a screw, nut, and ball, and is an ideal product for converting rotary motion into linear motion or vice versa.