Screw Jacks

jtw series machine screw jacks

JTW Series Machine Screw Jacks

JTW Series Machine Screw Jack is a device used to apply a force, push and pull, lift and lower, open and close, or move to a position and hold by mechanically converting rotary motion into linear motion. Due to the classic design, you don’t need to attach any construction elements to the housing. In the absence of vibration load, they have self-locking, and precisely positioned loads will hold loads without back driving, and no need for any brake mechanism or locking system. It can be mounted in any attitude. Generally maintenance-free.

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JTW Series Machine Screw Jack is a device used to apply a force, push and pull, lift and lower, open and close, or move to a position and hold by mechanically converting rotary motion into linear motion. Due to the classic design, you don’t need to attach any construction elements to the housing. In the absence of vibration load, they have self-locking, and precisely positioned loads will hold loads without back driving, and no need for any brake mechanism or locking system. It can be mounted in any attitude. Generally maintenance-free.

JTW-Series Machine Screw Jacks Key Features

* Self-locking machine screw, precise positioning, and uniform speed.

* Available in 10 sizes from JTW-1T to JTW-100T.
* Static load capacity from 1 Ton to 100 Ton.
* Machine screw diameter from 24 mm to 160 mm.
* Standard machine screws maximum length 6000 mm, custom longer stroke.
* Upright or Inverted mounting. Available in tension or compression loads.
* Translating, Keyed for non-rotating and Rotating designs.
* Models JTW-1T to JTW-10T/15T have THREE gear ratios (High, medium, Slow ratio). Models JTW-20T to JTW-100T has TWO gear ratios (High and Slow ratios).
* Standard with 1-start machine screw, custom 2-starts machine screw, offers increased travel speed and requires a brake or external locking device to hold the position.
* Custom-made machine screw diameter, pitch, gear ratios, and worm shaft sizes.
* Machine Screw Ends top plate, clevis end, plain end, threaded end, fork end, rod end.
* Can be operated manually operated or by an electric motor driven.
* Single-unit use or complete jacking system, including gear motors, bevel gearboxes, connecting shafts, and couplings for dual or multiple jack arrangements.
* Custom-made double clevis screw jack, anti-backlash screw jack.
* Can be used as alternatives to hydraulic and pneumatic systems.

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) 24×4 30×6 40×7 58×12 58×12 65×12 90×16 100×20 120×20 160×23
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: slow ratio
2. Max. Allowable power is under the conditions that ambient temperature is 20 degrees C, duty cycle 20%h, and input speed 1500rpm.
3. Efficiency is under grease lubrication.
4. Self-locking under static conditions, without vibration loads.

Trusted QC System

Quality is maintained throughout the ball screw lift manufacturing process, from material selection to mass production and packaging.

Our measuring room is equipped with modern three-dimensional measuring machines, which ensures that all of our products follow industry standards through various inspections and tests.

Housing Testing Worm Shaft Testing Housing Testing
Worm Shaft Testing Worm Wheel Testing Ball Screw Testing

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