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JTM-Series Worm Screw Jacks

Mechanical worm gear screw jack with trapezoidal lifting screw available with translating lifting screw or lifting nut. As a leader in the manufacture of mechanical screw jacks, and with various of power transmission products in the field, we guarantee quality, reliability, performance and value. Tasks that worm gear screw jacks handle well will vary: lifting, lowering, tipping or moving. But in every case, industry requirements and the power parameters demand a powerful, reliable and complete worm gear screw jack system, easy to adapt to the specific application.

JTM-Series Worm Screw Jacks
 Key Features
1. With 10 sizes, lifting capacities from 10 kN, 25 kN, 50 kN, 100 kN, 150 kN, 200 kN, 300 kN, 500 kN, 750 kN, and 1000 kN.
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 worm screw jacks can be connected together in systems so that multiple units can be operated and controlled together. 



JTM-Series Worm Screw Jacks Specifications
Model JTM10 JTM25 JTM50 JTM100 JTM150 JTM200 JTM300 JTM500 JTM750 JTM1000
Max. lifting force (KN) 9.8
(1t)
24.5
(2.5t)
49
(5t)
98
(10t)
147
(15t)
196
(20t)
294
(30t)
490
(50t)
735
(75t)
980
(100t)
Lifting screw sizes Tr (mm) 20x4 26x5 40x8 50x10 55x10 65x12 85x16 120x16 130x16 150x20
Gear ratio (H) 1/5 1/6 1/6 1/8 1/8 1/8 10-2/3:1 10-2/3:1 10-2/3:1 12
Lifting screw travel (mm), per turn of input shaft (H) 0.8 0.83 1.33 1.25 1.25 1.5 1.5 1.5 1.5 1.67
Efficiency % (H) 21 21 22 22 20 20 19 15 13 13
Gear ratio (L) 1/20 1/24 1/24 1/24 1/24 1/24 32:1 32:1 32:1 36:1
Lifting screw travel (mm), per turn of input shaft (L) 0.2 0.21 0.33 0.42 0.42 0.5 0.5 0.5 0.5 0.56
Efficiency % (L) 12 12 14 15 14 13 11 10 8 8
Idling torque (N.m) 0.29 0.62 1.4 2 2.6 3.9 9.8 19.6 29.4 39.2
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
10 KN5:1, 20:120 mm4 mmDOWNLOAD
25 KN6:1, 24:126 mm5 mmDOWNLOAD
50 KN6:1, 24:140 mm8 mmDOWNLOAD
100 KN8:1, 24:150 mm10 mmDOWNLOAD
150 KN8:1, 24:155 mm10 mmDOWNLOAD
200 KN8:1, 24:165 mm12 mmDOWNLOAD