Unimec TPR 740 Technopolymer Screw Jack
Unimec TPR 740 Technopolymer Screw Jack
Code: TPR 740
Brand: Unimec
Materials
| Material | Normative | Specification | Indications | |
|---|---|---|---|---|
| Worm | 16NiCr4 | EN 10084:2008 | Casehardening alloy steel | Casehardened and ground on teeth and holds |
| Threaded spindle | C45 | EN 10083-2:2006 | Carbon steel | Tr 40x7 (ISO 2901:2016) - Rolled or machined |
| Carter | Technopolymer | Polyarylamide | Made by 2 half-shell | |
| Nut | Technopolymer | Polyarylamide | Glass fiber reinforced | |
| Worn wheel | Technopolymer | Polyarylamide | Glass fiber reinforced |
General features
| Operating temperature [°C] | -20 °C / 50 °C |
|---|---|
| Static load (traction or compression) | 30 kN |
| Dynamic load (traction or compression) | 18 kN |
| Maximum input speed | 1800 rpm |
| Main gearbox weight | 3 kg |
| Trapezoidal screw weight | 9 kg/m |
| Anti-rotation torque at maximum load | 165 Nm |
| Maximum admissible static lateral loads | 300 N |
| Center-to-center diameter | 70 mm |
| Maximum radial load on worm | 600 N |
| Standard working conditions | 25 °C - servizio 10% |
Specific features
| Nominal ratios | |||
|---|---|---|---|
| 1/5 | 1/10 | 1/30 | |
| Real ratio | 1/5 | 1/10 | 1/30 |
| Translation per worm revolution | 1,4 mm | 0,7 mm | 0,23 mm |
| Efficiency | 28 % | 25 % | 18 % |
| Start-up efficiency | 20 % | 18 % | 13 % |
| Maximum linear speed | 2520 | 1260 | 420 |
| Torque at maximum load | 40 Nm | 23 Nm | 11 Nm |
| Worm screw maximum torque | 490 Nm | 128 Nm | 154 Nm |
| Idle torque | 0,65 Nm | 0,45 Nm | 0,35 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]
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]
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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