How to Choose the Tonnage of Screw Jack Correctly

How to Choose the Tonnage of Screw Jack Correctly
 The main principle of screw jack is all integral steel casting. Heat treatment and forging technology are adopted for each component, which makes the structure more compact. The rational swing of the rocker can drive the rotation of gears and gear shafts, promote the rotation of screw, and promote the rise or fall of  lifting drum, so as to make the weight rise or fall.           
 The helical Jack rotates with the combined force of gear and gear shaft, and the lifting drum is stable to ensure the safe rise or fall of heavy objects.
 Screw Jack seems simple, but in use, if the tonnage selection is incorrect, it may cause damage to heavy objects and jacks, and the safety of personnel will be threatened. The most important thing to pay attention to is personnel safety, so It is particularly important for people to choose the tonnage of screw jack reasonably when purchasing and operating.           
 1.  Description of the tonnage of screw jack:           
 (1)  3.2 to 10 tons: suitable for goods with small lifting volume or light weight, usually mainly automobile maintenance, low safety index, simple and convenient operation.           
 (2)  From 16 tons to 50 tons: 16 tons, 20 tons, 25 tons, 32 tons and 50 tons. These specifications are used by many people. They are often used in the replacement of axle linings and the installation and support of bridge structures. They are mostly purchased in large quantities and are popular with consumers. They are  the best sellers.           
 (3)  From 100 tons to 380 tons: 100 tons, 200 tons, 320 tons and 380 tons. These specifications are large tonnages and are mostly purchased in small batches. They are often used in bridge construction because of their heavy bearing  capacity.           
 2.  How to choose the right tonnage?           
 (1)  When we understand the description of the tonnage of the screw jack, we can reasonably choose the tonnage of the screw jack according to the goods we want  to lift.           
 (2)  When purchasing, if there are requirements for lifting height and tonnage, you can contact the manufacturer to select the right product for you. When operating, we must be familiar with the matters needing attention and the method of use. We should not operate at will. Remember that safety always comes first.
 3.  Maintenance:
 (1)  It is necessary to add lubricating oil regularly to the rocker of screw jack to keep ratchets, gears and lifting drums moving flexibly and reliably and lifting freely.           
 (2)  Planar bearings should always be lubricated. Usually, the base should be removed and lubricated once a year. Before disassembly, the fastening screw at the lower part of the shell should be rotated. After disassembly, it is necessary to ensure that the parts are not contaminated with dust, and that dust is not brought into the housing cavity.           
 (3)  The friction surface between the groove of the lifting drum and the shell key sheath must be regularly injected with lubricating oil to ensure that the lifting drum rises and falls lightly and smoothly.