Ball Screws
The ball screw is a motion transmitting element for machine tools and various machine components, which converts rotary motion into rectilinear motion with high efficiency, high accuracy, load capacity, rigidity and long life.
The selection, installation and operation of the right type, power and size variants requires great care.
Production drawings can be based on
The selection, installation and operation of the right type, power and size variants requires great care.
Production drawings can be based on
- customer drawings
- Sketches and design data
- supplied samples
Manufactured ball screw types
The size charts show our standard types and sizes.
In case of custom requirement, please contact us.
General characteristics of Szimikron ball screws
Accuracy classes
3 / DIN 69051, ISO 3408
Direction of thread
Left / Right
Material quality
spindle:
100Cr6, induction hardened
nut:
16MnCr5 (BC3), case hardened
Thread surface
hardened, ground
HRC 60 ยฑ 2
Technical solutions
thread profile: pointed arch, ground
ball recirculation: internal, per thread
preload: adjustable, mechanical
wiper: polymer
DESIGN AID
If the characteristic load data and the dynamic base load “C” of the ball spindle are known, the calculation can be done using the following formulas:
- Nominal life duration in number of rotations:
L=(\frac{C}{F_m})^3ยท10^6
[turnaround]ย ย where:
Fm = average axial load [N]
C = dynamic base load [N]
- Nominal life duration in hours:
L_h=\frac{L}{n_mยท60}
[Nm]ย ย where:
L = lifetime duration [turnaround]
nm = average RPM [min-1]
nm = average RPM [min-1]
(Note: L h lifetime refers to the ball screw. The machine life in hours = L h โ X , where: X is the ratio of the machine and ball spindle start-up times)
Average RPM and average axial load calculation
With the variable speed and variable axial load force that characterise the use of a ball screw, the operating cycle of the ball screw must be broken down into a few typical working phases. The values nm and Fm of the above formulas must be calculated from the speeds and axial forces characteristic of the typical working phases
With the variable speed and variable axial load force that characterise the use of a ball screw, the operating cycle of the ball screw must be broken down into a few typical working phases. The values nm and Fm of the above formulas must be calculated from the speeds and axial forces characteristic of the typical working phases
- Average RPM:
n_m=
\frac{q_1}{100} ยท n_1 +
\frac{q_2}{100} ยท n_2 + … +
\frac{q_n}{100} ยท n_n
[min-1]
where:
ni = rpm of the i-th phase [min-1]
qi = time rate of the i-th phase [%]
qi = time rate of the i-th phase [%]
- Average axial load:
F_m=
\sqrt[3]
{F^3_1 ยท
\frac{n_1}{n_m} ยท
\frac{q_1}{100} +
F^3_2 ยท
\frac{n_2}{n_m} ยท
\frac{q_2}{100} + … +
F^3_n ยท
\frac{n_n}{n_m} ยท
\frac{q_n}{100}
}
[N]
where:
F i = axial load of the i-th phase [N]
n i = RPM of the i-th phase [min-1]
n m = average RPM [min-1]
q i = time rate of the i-th phase [%]
If the ball screwโs characteristic load datas
ni โฆ
Fi โฆ
qi โฆ
and the
Lh planned lifetime in hours are known according to the formulas above, then the required dynamic base load is calculated with the formula below:
C=F_m ยท \sqrt[3]
{\frac{L}{10^6}}
[N]ย ย where:
L=Lh ยท nm ยท 60 lifetime [turnaround]
(Fm; n m values according to the formulas above)
(Fm; n m values according to the formulas above)
- Driving torque – for conversion of rotary motion into linear motion
M_ta=\frac{FยทP}{2000 ยท \pi ยท ฮท}
[Nm]ย ย where:
F = operating load [N]
P = pitch [mm]
ฮท = efficiency (~0,9)
P = pitch [mm]
ฮท = efficiency (~0,9)
- Drive performance
P_a=\frac{M_{ta} ยท n}{9550}
[kW]ย ย where:
M ta =drive torque [Nm]
n = RPM [min -1]
n = RPM [min -1]
USER GUIDE
Ball screws require precise and rigid installation. Both the parallelism deviation between the spindle and the guide rail and the deviation of the nut mounting inclination must be kept within minimum tolerances.
The ball screw endings are designed according to drawings provided by customers. The ISO 3408 EU standard shall be used as a guide for the specification of tolerances on shape and positioning corresponding to the accuracy class.
Ball screws can be lubricated with basically the same lubricants as rolling bearings, but the lubricant consumption is higher. The lubricant can be oil or grease. Oil lubrication allows higher speed because the it heats up less, than grease lubrication.
For grease lubrication, re-lubrication every 6 months or so after the running-in cycle is sufficient.
Following the parameters and sequence below:
- nominal diameter: 40 mm
- thread pitch: 20 mm, right
- ball size: 7,144 mm
- thread length: 1040 mm
- total length: 1280 mm
- nut: 4-4 threads, flanged and cylindrical double nut
- wiper: both ends
- accuracy class: class 3
Ball screws in stock
For more information, please contact us
Termรฉk kรณd Product code | Termรฉk adatok Product specs | Mennyisรฉg (db) Quantity (pc) |
|---|---|---|
92-949 | Golyรณsorsรณ 25x05R 540/1000(AFV-AZV)/3 | 3 |
99-131 | Golyรณsorsรณ 25x10R 346,5/456,5 (AFVA)/2 | 1 |
99-576 | Golyรณsorsรณ 32x05R 327/487 (AFV-AZV)/3
| 1 |
92-960 | Golyรณsorsรณ 32x05R 570/952(AFV-AZV)/3 | 1 |
92-905 | Golyรณsorsรณ 32x05R 595/798(AFV-AZV)/3 | 1 |
92-915 | Golyรณsorsรณ 32x05R 625/832(ZNV-ZNV)/5 | 3 |
93-157 | Golyรณsorsรณ 32x05R 874/1000(AZNA)/4 | 1 |
92-961 | Golyรณsorsรณ 32x10R 1115/1700(AFV-AZV)/3 | 1 |
92-962 | Golyรณsorsรณ 32x10R 1615/2200(AFV-AZV)/3 | 1 |
93-911 | Golyรณsorsรณ 32x10R 384/537(AFV-AZV)/3 | 1 |
92-262 | Golyรณsorsรณ 32x10R 403/602(AFV-AZV)/3 | 3 |
99-206 | Golyรณsorsรณ 32x10R 565/1163,5 (AFV-AZV)/3 | 2 |
99-205 | Golyรณsorsรณ 32x10R 643/783 (AFV-AZV)/3 | 2 |
99-204 | Golyรณsorsรณ 32x10R 765/955 (AFV-AZV)/3 | 1 |
93-416 | Golyรณsorsรณ 32x10R 803/931(AFA)/3 | 3 |
93-300 | Golyรณsorsรณ 32x15R 364,5/488,5(AFV-AZV)/3 | 2 |
97-624 | Golyรณsorsรณ 32x20R 708/947(AFV-AZV)/3 | 1 |
93-374 | Golyรณsorsรณ 32x20R 869/1087(AFV-AZV)/2 | 2 |
92-741 | Golyรณsorsรณ 38x10R 660/701(AZNV-AZNV)/3 | 1 |
92-740 | Golyรณsorsรณ 38x10R 730,5/772(AZNV-AZNV)/3 | 1 |
92-742 | Golyรณsorsรณ 38x10R 935/1100(AZNV-AZNV)/3 | 1 |
93-184 | Golyรณsorsรณ 38x15R 828/1097(AFV-AZV)/4 | 2 |
97-630 | Golyรณsorsรณ 40x10R 593,5/847(AFV-AZV)/3 | 1 |
99-126 | Golyรณsorsรณ 40x10R 833/1110 (AFV-AZV)/6 | 1 |
93-928 | Golyรณsorsรณ 40x10R 880/1090(AFV-AZV)/3 | 2 |
92-490 | Golyรณsorsรณ 40x15R 1020/1326(AFV-AZV)/4 | 2 |
92-488 | Golyรณsorsรณ 40x15R 925/1130(AFV-AZV)/4 | 5 |
97-571 | Golyรณsorsรณ 40x20R 1073/1300(AFVA)/4 | 2 |
97-174 | Golyรณsorsรณ 40x20R 1234/1514(AFVA)/4 | 1 |
93-943 | Golyรณsorsรณ 40x25R 1132/1295(AFVA)/3 | 1 |
97-306 | Golyรณsorsรณ 40x25R 1138/1347(AFVA)/3 | 4 |
93-877 | Golyรณsorsรณ 41x08R 645/813(AFV-AZV)/5 | 2 |
94-866 | Golyรณsorsรณ 42x16R 885/1418(AFV-AZV)/3 | 1 |
93-161 | Golyรณsorsรณ 50x06L 765/963(FV-ZV)/4 | 1 |
93-047 | Golyรณsorsรณ 50x10R 1394/2412(AFV-AZV)/4 | 1 |
99-829 | Golyรณsorsรณ 50x10R 1710/1974(AFV-AZV)/4 | 2 |
97-058 | Golyรณsorsรณ 50x10R 1842/2092(AFVA)/5 | 1 |
99-828 | Golyรณsorsรณ 50x10R 1910/2269(AFV-AZV)/4 | 2 |
94-853 | Golyรณsorsรณ 50x10R 545/693(AFVA)/6 | 1 |
92-497 | Golyรณsorsรณ 50x10R 835/1120(AFV-AZV)/4 | 1 |
94-610 | Golyรณsorsรณ 50x15R 1082/1273(AFV-AZV)/4 | 2 |
92-489 | Golyรณsorsรณ 50x15R 1165/1425(AFV-AZV)/4 | 7 |
97-779 | Golyรณsorsรณ 50x16R1120/1381 (AFV-AZV)/4 | 1 |
97-255 | Golyรณsorsรณ 50x20R 1234/1514(AFVA)/4 | 3 |
93-515 | Golyรณsorsรณ 50x30R 1130/1282(AFV-AZV)/3 | 1 |
93-898 | Golyรณsorsรณ 50x30R 1130/1282(AFV-AZV)/4 | 1 |
94-520 | Golyรณsorsรณ 50x30R 1490/1838(AFVA)/3 | 1 |
93-542 | Golyรณsorsรณ 50x30R 873/1025(AFV-AZV)/2 | 2 |
97-634 | Golyรณsorsรณ 63x10R 2310/2575(AFV-AZV)/5 | 1 |
94-807 | Golyรณsorsรณ 63x10R 457/700(AFV-AZV)/6 | 1 |
92-498 | Golyรณsorsรณ 63x10R 840/1125(AFV-AZV)/5 | 1 |
93-001 | Golyรณsorsรณ 63x10R 845/1142(AFV-AZV)/5 | 2 |
93-449 | Golyรณsorsรณ 63x10R 894/1152(AFV-AZV)/5 | 1 |
93-473 | Golyรณsorsรณ 80x10R 1025/1304 (AFV-AZV)/6 | 1 |
92-495 | Golyรณsorsรณ 80x10R 910/1189(AFV-AZV)/5 | 1 |
