Screw Jacks

ball screw jacks

Ball Screw Jacks

The ball screw jacks can be employed for lifting, pulling, moving, and aligning any load with perfect synchronism, which is difficult to obtain by other handling devices. The ball screw jacks are suitable for high services as well as for very rapid, quick, and precise positioning. As compared to trapezoidal screw jacks, it presents transmission reversibility: it is, therefore, advisable to provide brakes, blocking, or contrast torques to avoid a direction reversal. Screw jacks can be applied singularly or in groups connected adequately with shafts, joints, and bevel gearboxes.

As one of the screw jacks manufacturers, suppliers, and exporters of mechanical products, We offer screw jacks and many other products. Please get in touch with us for details.

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As a professional ball screw jack manufacturer with more than ten years of production experience and thousands of application experience in the field, we guarantee the reliability, quality, and service.

The ball screw jacks can be employed for lifting, pulling, moving, and aligning any load with perfect synchronism, which is difficult to obtain by other handling devices. The ball screw jacks are suitable for high services as well as for very rapid, quick, and precise positioning. As compared to trapezoidal screw jacks, it presents transmission reversibility: it is, therefore, advisable to provide brakes, blocking, or contrast torques to avoid a direction reversal. Screw jacks can be applied singularly or in groups connected adequately with shafts, joints, and bevel gearboxes.

  • Travel lengths built to specification
  • Ball screw jack in stainless steel materials is available.
  • Upright or inverted, screw translating or nut rotating
  • Screw end options: top plate, clevis, plain end, thread end
  • Three jack configurations: translating, rotating, and keyed
  • It can use individually or in multiple arrangements.
  • Not self-locking; it requires a brake motor to hold the position.

Ball Screw Jack Mechanism Specification

Model LMB010 LMB025 LMB050 LMB100 LMB150 LMB200 LMB300 LMB500 LMB750 LMB1000
Maximum Load (KN) 9.8 24.5 49 98 147 196 294 490 600 810
Outer Diameter of screw (mm) 20 25 40 50 55 65 80 100 125 160
 Root Diameter of screw (mm) 17.5 21.133 34.91 44.91 44.91 57.91 72.466 87 110 142
Screw Pitch (mm) 4 8 10 10 16 16 16 25 25 32
Gear Ratio H 5 6 6 8 8 8 10.67 10.67 10.67 12
L 20 24 24 24 24 24 32 32 32 36
Efficiency H 0.61 0.62 0.64 0.63 0.63 0.62 0.56 0.6 55 55
L 0.34 0.35 0.39 0.43 0.43 0.42 0.34 0.38 35 35
Permissible max. Power ( KW ) H 0.54 1.3 2.2 3.6 4 5.5 8.9 13.3 14.5 21.5
L 0.27 0.63 1 1.9 2.1 2.8 4.1 6.5 7.5 9.5
No-load Torque(N·m) 0.29 0.62 1.37 1.96 2.65 3.92 9.81 19.6 27 38
Keeping Torque(N·m) H 1.27 4.31 10.78 19.6 39.2 51 68.6 140.1 175 260
L 0.26 0.91 2.4 5.8 11.8 15 19.5 41.2 52 70
Permissible torque of input

shaft (N·m)*

 19.6 49 153.9 292 292 292 735 1372 1764 2450
Required torque of input

shaft at max. Load (N.m)

 H 2.8 9 21.5 39.1 77 104.5 169.6 317.5 435 663
L 1.4 4.3 9.6 20.4 39.6 54.2 98.5 177.9 242 365
Screw travel length (mm)

per turn of worm shaft

 H 1 1.66 1.67 1.25 2.5 1.25 1.88 2.25 2.34 2.67
L 0.25 0.42 0.42 0.42 0.83 0.42 0.63 0.75 0.78 0.89
Permissible max. Input

(rpm) when max. load

 H 1500 1400 1000 890 500 500 500 400 310 300
L 1500 1400 1000 890 500 500 400 350 295 240
Screw torque when max. Load (N·m) 8.7 34.7 86.7 208.2 416.3 555.1 1040.9 2081.7 2514 4586

Primary Type of Ball Screw Jack

XL ball screw jacks use high-efficiency TBI ball screws, suitable for higher-duty circles and higher-speed applications. It requires less input torque to move the load when compared with machine screw jacks.

There are two main types of ball screw jacks, screw translating and nut traveling. The transacting ball jack uses a ball screw traveling into or out of the gearbox. The ball screw protrudes from the gearbox to lift the load. For the nut traveling ball screw jack (also call rotating screw jack), The ball screw shaft remains stationary. The lifting nut moves along the ball screw shaft to lift the load.

We can also produce screw jacks with an anti-rotation feature(also called keyed screw jack), which can prevent its lifting screw from drag turning.

Upright Screw Transiting Inverted Screw Translating Inverted Nut Travelling Upright Nut Travelling

Best Materials

Raw materials decide the screw jack’s overall quality. At XL, we use the best materials to guarantee the performance & lifetime of the ball screw jack mechanism you purchased.
  • Housing: Ductile iron housings. Compared with gray cast iron, it has higher plasticity and toughness, better mechanical properties, and its comprehensive properties are close to steel.
  • Worm gear: ZQAl9-4  or ZCuSn10Pb1, high hardness, excellent wear resistance, not prone to seizure, good casting performance, and cutting performance.
  • Worm shaft: 20CrMnTi, Surface carburizing and hardening treatment has good workability, small processing deformation, and good fatigue resistance.
  • Lifting Screw: C45, GCr15 or 316, 304. This series, it uses TBI brand ball screws.
  • Bearings: Tapered or ball thrust bearings, anti-friction, and provide rugged reliability.
  • Grease lubrication. Offers easy maintenance.

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 etc., which makes sure 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

Projects We Worked

XL ball screw jack and systems have been trusted in countless applications for over 10 years.  They are widely used in Packing, factory automation, food and beverage, transportation, machining and manufacturing, military and aerospace, etc.

Each customer has a unique requirement, we can tailor an optimum solution to best suit your application. Let our highly experienced engineers help with your project.

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