Unimec Trapezoidal Screw Jacks Size 204 TPR Render
Unimec Trapezoidal Screw Jacks Size 204 TPR Render
Code: Trapezoidal Screw Jacks Size 204 TPR
Brand: Unimec
Materials
| Material | Normative | Specification | Indications | |
|---|---|---|---|---|
| Worm | 16NiCr4 | EN 10084:2008 | Casehardening alloy steel | Casehardened and ground on teeth and holds |
| Worn wheel | CuAl10Fe2-GM | EN 1982:2008 | Alluminium bronze | Chill molded |
| Nut | CuAl10Fe2-GM | EN 1982:2008 | Alluminium bronze | Chill molded |
| Threaded spindle | C45 | EN 10083-2:2006 | Carbon steel | Tr 20x4 (ISO 2901:2016) - Rolled or machined |
| Carter | GJL 250 | EN 1561:2011 | Grey cast iron | Completely machined on 6 faces |
| Lubricant | Unimec Mark CA | Calcium based grease | 0,1 kg |
General features
| Operating temperature [°C] | -10 °C / 80 °C |
|---|---|
| Static load (traction or compression) | 20 kN |
| Dynamic load (traction or compression) | 10 kN |
| Maximum input speed | 1800 rpm |
| Main gearbox weight | 6 kg |
| Trapezoidal screw weight | 2,22 kg/m |
| Anti-rotation torque at maximum load | 17 Nm |
| Maximum admissible static lateral loads | 0 N |
| Center-to-center diameter | 30 mm |
| Maximum radial load on worm | 220 N |
| Standard working conditions | 25 °C - servizio 10% |
Specific features
| Nominal ratios | |||
|---|---|---|---|
| 1/5 | 1/10 | 1/30 | |
| Real ratio | 1/4,75 | 1/10,5 | 1/30 |
| Translation per worm revolution | 0,842 mm | 0,38 mm | 0,13 mm |
| Efficiency | 31 % | 28 % | 20 % |
| Start-up efficiency | 22 % | 19 % | 14 % |
| Maximum linear speed | 1440 | 720 | 240 |
| Torque at maximum load | 4,2 Nm | 2,3 Nm | 1,1 Nm |
| Worm screw maximum torque | 54 Nm | 54 Nm | 42 Nm |
| Idle torque | 0,25 Nm | 0,2 Nm | 0,15 Nm |
Euler's law (safety factor =2; dynamic compression load)
Limit Load 1 (red) - 2 (blue) - 3 (green)
C = Load [kN]
L = Overall trapezoidal screw length [mm]
![](\"https://www.unimec.eu/images/MAR-PROD/204/eulero_204.jpg\")
![](\"https://www.unimec.eu/images/MAR-PROD/Eulero/Eulero-1-TPR.jpg\")
![](\"https://www.unimec.eu/images/MAR-PROD/Eulero/Eulero-2-TPR.jpg\")
![](\"https://www.unimec.eu/images/MAR-PROD/Eulero/Eulero-3-TPR.jpg\")
Power curves
The magenta zone indicates a potential heating risk. Working cycles must be carefully analized.
VR = Worm rotational speed [rpm]
VL = Spindle translation speed [mm/min]
P = Requested input power [kW]
![](\"https://www.unimec.eu/images/MAR-PROD/204/204-1_5.jpg\")
![](\"https://www.unimec.eu/images/MAR-PROD/204/204-1_10.jpg\")
![](\"https://www.unimec.eu/images/MAR-PROD/204/204-1_30.jpg\")
Unimec Datasheets
| Country & Language | File Name | Download Link |
 United States (English) |
Unimec-EN_59050.pdf | Download |
 Deutschland (Deutsch) |
Unimec-DE_13807.pdf | Download |
 Italy (Italiano) |
Unimec-IT_75906.pdf | Download |
 中国（简体 |
Unimec-CN_95426.pdf | Download |
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