Screw Jack

Polimak Group Industrial Production Industry INC. 1232. Sok No: 25-27 Ostim ANKARA

www.polimak.comTel: +90312 3540976

Faks: +90312 3850394

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Screw Jack

Polimak A.Ş. has been producing industrial systems and equipment, offering its clients engineeringservices with 40 years of experience.

Our screw jacks and powertrain products offer the best solution for of rectilinear work. Withcapacities ranging from 5KN to 1500kN our products promise you the solutions you seek. Our goalis to present you the most convenient design, the fastest and the most correct solution while meetingthe required need for the balance of performance, life and cost of the product. We have a wide rangeof application. We provide services from mechanical and automotive to hardwood and defenseindustry, and on.

Screw jacks are used in lifting of any load, pulling of a piece, arrangement of working space ofmachinery, and in many rectilinear work. Screw jacks are known as lineer motor, linear actuator,mechanical jack. To decide on the best product and fulfil all of your needs go check our screw jackcatalogs and fill purchase order from our website.

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Working principle of screw jacks

V-Travelling Ball Screw Type

Main components of screw jacks are; trapezoidal lifting screw,worm screw, worm gear and gear housing. Worm screw is rotatedmanually or by motor. Worm gear is rotated by worm screw. Thelifting screw moves through the rotating worm gear. If free loadconnected to screw jack, screw will rotate circularly and move upande down. If it is constantly load, screw will move vertical wayslinearly. The linear motion speed of lifting screw depends onthread size and rotation ratio of worm gears.

Travelling Ball Screw Type

K-Travelling Ball Wedge Screw Type

Main components of screw jacks are; trapezoidal lifting screw,worm screw, worm gear and gear housing. Worm screw is rotatedmanually or by motor. Worm gear is rotated by worm screw. Thelifting screw moves through the rotating worm gear. In order toprevent/block screw's rotation, wedge should be opened to screw.By this way, the screw can just move vertically. Screw connectiontype's importance will be put away. The linear motion speed oflifting screw depends on thread size and rotation ratio of wormgears.

Travelling Ball Wedge Screw Type

T-Travelling Ball Nut Type

Main components of screw jacks are; trapezoidal lifting screw,worm screw, lifting nut and gear housing. Worm screw is rotatedmanually or by motor. With the rotation of the gear, the screw thatis inside the screw jack only makes its rotation about its axis. Theflange, which is produced from the bronze material on the screwshaft moves linearly upwards or downwards. One of the purposesof using such systems is the lack of ducting or storage for themovement of the screw used in the screw type and screw typecockp. Although screw jack doesn't lift down from bottom. Thelinear motion speed of lifting screw depends on thread size androtation ratio of worm gears.

Travelling Ball Nut Type

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Screw Jack Order Code

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Load Capacity Table

Attention:

Manual or optional working speed of screw jacks is chosen according to the table above. As forscrew jacks that will be used for motors or reductors, the progress pace, X and Y type, will bedetermined by our company according to the selected features.

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Dimension Table

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Type of Spindle Heads

V-Travelling ball screw and K-Travelling ball wedge screw version type

0-Type (Plain Head)

The standard is like thetable.

1-Type (Rod-Type Head)

The standard is like thetable.

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2-Type (Flange Plate)

T -Travelling ball nut version

3-Type

PG5T models version type

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PG15T,PG20T....PG500T models version type

4-The special design nut and flange connection types

Specially designed nuts and flange connection types and modelsare designed according to company requirements.

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Equipment TypeA-Type

V and K types of screw jacks does not have protectedbellow and cover pipe.

B-Type

V and K types of screw jack have protected bellow. Used toprotect aganist external factors (water, dust, etc.). Bellowlength should be equal to screw stroke length.

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C-Type

V and K types of screw jack have cover pipe. Used to protectaganist external factors (water, dust, etc.). Cover pipe lengthshould be equal to secrew stroke length.

D-Type

V and K types of screw jacks have protected bellow andcover pipe. Used to protect aganist external factors (water,dust, etc.). Protected bellow and cover pipe length should beequal to secrew stroke length.

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E-Type

• Pivot Mounting

• Special Design Equipments

Special design equipments are designed according tocompany requirements.

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Load Graphs

Load capacity of screw jacks depends on length of screw shaft. Load capacity changes according to screwshaft length and installation methods. Installation methods named with Euler 1, Euler 2, and Euler 3. Samegraphics valid for travelling screw and travelling nut.

Euler 1

Screw jack housing fixed to the base. Trapezoidal end (ornut) lifting the load freely

Euler 2

Gear housing assembled by pin or joint. Trapezoidal end(or nut) assembled by pin or joint, and it is collinear tothe motion

Euler 3

Screw jack housing fixed to the base. Trapezoidal end (ornut) assembled by pin or joint, and it is collinear tomotion

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Permissible Capacity Value

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Installation Positions

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Installation Examples

The motorized or reducible screwed jack is designed so that motor and shaft connectioncan be made in both directions. The choice of gear unit type, motor type andinterconnection shaft types (according) to the load and materials to be lifted is determinedby our company. The choice of X and Y type is determined by our company according tothe requested pace and according to the specifications stated in the order form and thebest efficiency and also performance is ensured.

In our assembly examples, we have diagrams of how screwed jack shaft connections,motor and reducer connections are implemented.

In our practical examples, you can have an idea of where and how your screwed screwjacks are used in everyday life. You can also find out about screwed jack installation andequipment. You can also obtain information about installment and equipment of screwjacks.

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Installation Examples

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Installation Examples

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Application Examples

RADAR APPLICATION

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Application Examples

STAGE LIFTING APPLICATION

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Application Examples

BENDING ROLLER APPLICATION

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Application Examples

LOAD LIFTING SYSTEM APPLICATION

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Application Examples

LOAD LIFTING SYSTEM APPLICATION

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Application Examples

TRIAXIAL LOAD LIFTING SYSTEM APPLICATION

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Application Examples

DAM SHUTTER APPLICATION

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Application Examples

PLATFORM LIFTING APPLICATION

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Application Examples

SOLAR ENERGYPANELS LIFTING APPLICATION

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Application Examples

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