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Screw Jacks,Gearboxes,Actuators,Lifting Systems Manufacturers

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JTW-Series Machine Screw Jacks

Machine Screw Jack is used wherever fixed to controlled lifting, lowering, tilting, and slewing movements are required in an safe and reliable operation. Machine screw jacks offer precise positioning, uniform lifting speeds and capacity up to 100 tons. Standard model configurations include upright or inverted units with translating or rotating lifting screws. End configurations include top plate, plain, threaded, and clevis ends. This machine screw jack has low cost and large stock.

JTW-Series Machine Screw Jacks Key Features

1. With 10 sizes, lifting capacities from 1 ton to 100 ton as Standard
2. Translating and Rotating Screw configurations, Anti-rotation (keyed) design option.
3. Two Gear ratios and single screw leads as standard. Customized double screw leads.
4. The machine screw jacks can be connected together in systems so that multiple units can be operated and controlled together. 





JTW-Series Machine Screw Jacks Specifications
Model JTW-1T JTW-2.5T JTW-5T JTW-10T JTW-15T JTW-20T JTW-25T JTW-35T JTW-50T JTW-100T
Max. lifting force (ton) 1 2.5 5 10 15 20 25 35 50 100
Max. pulling force (ton) 1 2.5 5 9.9 13.5 16.5 25 35 50 100
Lifting screw sizes Tr (mm) 24x4 30x6 40x7 58x12 58x12 65x12 90x16 100x20 120x20 160x23
Gear ratio (H) 1/6 1/6 1/6 1/8 1/8 1/8 3/32 3/32 3/32 1/12
Lifting screw travel (mm), per turn of input shaft (H) 0.67 1 1.167 1.5 1.5 1.5 1.5 1.875 1.875 1.92
Efficiency % (H) 21 23 21 20.5 20.5 19.5 16 18 15 13
Gear ratio (L) 1/24 1/24 1/24 1/24 1/24 1/24 1/32 1/32 1/32 1/36
Lifting screw travel (mm), per turn of input shaft (L) 0.17 0.25 0.29 0.5 0.5 0.5 0.5 0.625 0.625 0.639
Efficiency % (L) 13 11 11.5 13 13 12.8 9 11 11 10
Idling torque (N.m) 0.29 0.62 1.4 2 2.6 3.9 9.8 16.5 19.6 39.2
Max. length of lifting screw (mm), when max. tensile force 1200 1500 2000 2500 2500 3000 3500 4000 5500 6500
Max. permissible power (kw) 0.25 0.55 1.1 2.6 2.6 3.7 4.8 6 7.5 15
Lubricant (kg) 0.05 0.1 0.25 0.5 0.5 0.75 1.1 1.9 2.2 2.5
Weight without stroke (kg) 4 7.3 16.2 25 25 36 70.5 87 420 1010
Weight of screw (kg), per 100 mm stroke 0.3 0.45 0.82 1.67 1.67 2.15 4.15 5.2 7.45 13.6
Remarks:
1. H: high ratio, L: low ratio
2. Max. allowable power is under the conditions that ambient temperature 20 degree C, duty cycle 20%h and input speed 1500rpm.
3. Efficiency is under grease lubrication.
4. Self-locking under static conditions, without vibration loads.

Lifting Force Gear Ratio Lifting Screw Diam. Lifting Screw Pitch Download
1 ton6:1, 24:124 mm4 mmDOWNLOAD
2.5 ton6:1, 24:130 mm6 mmDOWNLOAD
5 ton6:1, 24:140 mm7 mmDOWNLOAD
10 ton8:1, 24:158 mm12 mmDOWNLOAD
15 ton8:1, 24:158 mm12 mmDOWNLOAD
20 ton8:1, 24:165 mm12 mmDOWNLOAD
25 ton32:3, 32:190 mm16 mmDOWNLOAD
35 ton32:3, 32:1100 mm20 mmDOWNLOAD
50 ton32:3, 32:1120 mm20 mmDOWNLOAD
100 ton12:1, 36:1160 mm23 mmDOWNLOAD