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Screw Jacks,Gearboxes,Actuators,Lifting Systems Manufacturers


25 ton Machine Screw Jacks

25 ton Machine Screw Jacks Key Features
1. Maximum static load 25 Ton.
2. Lifting screw sizes Tr 90x16. Customized stroke length.
3. Translating and Rotating Screw configurations, Anti-rotation (keyed) design option.
4. High ratio 32:3, Low ratio 32:1.
5. The 25 ton Machine Screw Jacks can be connected together in systems so that multiple units can be operated and controlled together.  
6. Manual operation, Electric driven or both together. 

25 ton Machine Screw Jacks Drawing Dimensions

Sample Part Number

JTW-25T - US - 300 - H - II - C - PP
25 ton Machine Screw Jacks Specifications

1. Note: The dark gray figures in the tables indicates operational restrictions due to thermal limits. Selection of screw jacks using these figures should only be carried out in consultation with our engineers. When your selection is made within the areas shaded dark gray, you will need to reduce duty cycle or choose the bigger size screw jack in order to allow effective heat dissipation.
2. Conditions: 20% running time/60 minutes or 30% running time/10 minutes, 20 °C ambient temperature. Maximum allowable input power 4.8kw. 
3. H=high ratio 10.667:1 (1.5mm stroke for one input turn), L=slow ratio 32:1 (0.5mm stroke for one input turn).
4. Nm=input torque required, kW=input power required.
25 ton Machine Screw Jacks Design and Configurations
* US: Upright configurations, translating screw.
* IS: Inverted configurations, translating screw.

UK: Upright configurations, anti-rotation keyed screw.
IK: Inverted configurations, anti-rotation keyed screw.

UR: Upright configurations, rotating screw with lifting nut.
IR: Inverted configurations, rotating screw with lifting nut.
25 ton Machine Screw Jacks Stroke
Example: 300 mm stroke, lifting screw travels 300 mm, then we will make the lifting screw length=stroke+housing height+screw end length. All lifting screws stroke is made following your requirements. Special lifting screws design, please consult us!!
25 ton Machine Screw Jacks Gear Ratios
* H: high gear ratio 3/32, lifting screw travels 1.5mm per turn of input shafts revolution.
* L: low gear ratio 1/32, lifting screw travels 0.5mm per turn of input shafts revolution.
Customized medium speed ratio 1/16, lifting screw travels 1.0mm per turn of input shafts revolution.
25 ton Machine Screw Jacks Lifting Screw End Conditions
Standard lifting screw end conditions such as top plate, clevis end, threaded end, plain end. Can make lifting screw ends following your required. Before ordering, please send us your special design drawing of lifting screw ends.
25 ton Machine Screw Jacks Input Shaft Types and Motor Flange Types
Input Shaft Types
* A: left side shaft.
* B: right side shaft.
* C: both sides shaft (double input shafts).

Motor Flange Types
* M1: left side shaft and right side motor flange.
* M2: right side motor flange.
* M3: right side shaft and left side motor flange.
* M4: left side motor flange.
25 ton Machine Screw Jacks Accessories
Accessories such as protective tube, bellows boots, 3-phase motor, gear reducer, worm gear reducer, motor flange, hand wheel, bevel gearbox, travel limit switches, flexible coupling, connecting shaft, pillow blocks, flange blocks, screw stop nut, jack travelling nut or lifting nut, rod end bearing, safety nut, swivel plate, and trunnion adaptor etc.