As practice shows, home-made parts for cars and other do-it-yourself devices are in many ways not inferior to factory-assembled ones, and in some cases even surpass them.
Dear reader, today we want to take you through the design of a homemade press made from a jack. As practice shows, its assembly at home can guarantee its owner reliability and a long time of trouble-free operation.
What is the frame for the press made of?
The first thing you need to understand is that for such a tool as a jack, all components must be made of high-quality and durable material, otherwise injury cannot be avoided while working with it.
The base of the press must be rectangular in shape and have a frame in the shape of the letter “P”. According to all the laws of physics, it is precisely this design that will be able to influence the counterweight to compression and concentrate the main load in one place.
An important detail in all the work is the return mechanism, which looks like the most ordinary spring, so do not lose sight of it.
It is worth noting that those motorists who have a jack press radically make their job of repairing their car easier. This device can press out almost any metal part.
Mounting a vice on a workbench
I wasn't happy with the thickness of my workbench top so I fabricated and screwed a 50x100mm reinforcement underneath the top for extra strength.
- When installing, I used the jaws of a vise to ensure that the amplifier would be flush with the front of the countertop.
- I cut a slot in the amplifier to fit the threaded holder block.
- I glued the clamp to the back of the vise jaw so that the threaded rod holes lined up.
- I glued and screwed the jaw surface, retainer block and 50x100mm support all together flush with the top of the table.
Necessary materials
Finally, it's time to find out what you need to make a press from a jack. To make it correctly, you will need the following materials, namely:
- Standard jack.
- Solid spring (factory made).
- Metal corner and plate.
- Channel type P-10.
The work also cannot be done without auxiliary tools:
- Hammer.
- Bulgarians.
- High power welding inverter.
I glue the guides
- I press the movable jaw of the vice firmly against the edge of the tabletop.
- I glue guides made of wooden dowels into the holes.
- Additionally, I wedge the ends of the dowel.
Required drawings
As for the drawings and dimensions for making a press, there are a lot of options and possibilities. First you need to decide what size car you will use the jack with press for.
Everything here is extremely simple, the larger the machine, the correspondingly larger the press will be, and therefore the more sophisticated the drawings.
Let’s say right away that you won’t be able to make such drawings with your own hands, because they require precise engineering knowledge, but there is always a way out.
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You can use many online resources where there are a large number of drawings of any size. But in short, the approximate numbers in the drawings will be as follows:
- A-1800
- B-1000
- F-500
- L-300
- Kg-120
In almost all cases, the jack will be installed at the very bottom at its base. The press drawing will also indicate the dimensions of the bed.
Characteristics and Use of Hydraulic Bearing Pullers
Pullers are designed for dismantling parts pressed into structural elements. But most often they are used for dismantling various bearings in service stations. Since the removal process requires a lot of force, a hydraulic system has been added to the design of the device.
Purpose and design features of pullers
Hydraulic puller with support legs
Removal of complex structural elements must be carried out according to certain conditions. An important one is maintaining the original shape and avoiding damage. That is why a hydraulic puller should be used to perform this type of work.
Structurally, such devices consist of a hydraulic system that acts on the support rod. To fix the structure relative to the part being removed, various types of support platforms can be used - platforms, clamping claws, etc. First, the hydraulic puller is installed on the structure with the bearing (or other element), then the rod is positioned. With the help of a hydraulic system, pressure is exerted on the part being removed, as a result of which it is dismantled from the socket.
Using this device, you can carry out work on removing the following structural elements:
- bearings of various shapes. For auto repair shops, it is important to use a hydraulic puller when repairing hubs;
- bushings and pivots;
- couplings, gear transmissions;
- dismantling car components - brake discs and crankshafts.
But in addition to car service, hydraulic devices of this type can be used in repair shops. They have a fairly simple design and can operate without connection to external energy sources - electrical networks, compressed air supply systems, etc.
For the puller to operate, it is necessary to ensure that the working rod stops. To do this, fix the structure on the part using special elements. It is important that they can withstand the maximum load on the body.
Types of hydraulic pullers
Puller Component Locations
The design and technical characteristics of hydraulic pullers can be varied. To select the optimal model, you should carefully analyze its operating conditions. For example, for a specialized service station, mobility, the ability to install the device in hard-to-reach places, and operational reliability are important.
First of all, it is necessary to determine the maximum force that is generated as a result of the operation of the hydraulic system. For work in a car service center, a model with a pressure value of up to 15 tons will be sufficient. If dismantling of large bearings is required, you should choose more powerful pullers.
Depending on the design features, the following selection options can be distinguished:
- pump type - built-in or remote. In the first case, the compactness of the model increases. But for working with complex structures, it is recommended to choose a hydraulic puller with a remote hydraulic system;
- the method of increasing the pressure in the hydraulic cylinder is manual or using external devices. These can be hydraulic pumps or compressors. Such devices allow you to quickly create the required pressure in the device;
- type of clamp - platform or paws. The first is used if it is possible to make mounting holes for mounting a puller. The paws are used for installation on the structure without violating its integrity.
To increase functionality, some models provide the ability to install clamps of various designs. But in addition to this factor, the mobility of the device should be taken into account. Stationary models are designed for dismantling bearings or similar components after installing the structure in the machine. Mobile ones are mounted directly on the hub or other component of the car.
The applied force must be monitored using the built-in dynamometer. This makes it possible to avoid damage to the component being removed.
List of technical characteristics
Mobile hydraulic puller
Having determined the optimal design of a hydraulic puller, you can begin a detailed analysis of its technical characteristics. However, it should be remembered that they directly depend on the specifics of a particular model and its layout.
To work with large units and assemblies, it is recommended to use mobile models. They are installed directly on the unit to be dismantled and then the bearing is removed using a hydraulic system. Therefore, the determining parameters are the small size and weight of the hydraulic puller. With the exception of manual models, the hydraulic system is often located separately from the device. This makes it possible to minimize the size of the structure and its weight.
In addition to the dimensions, when choosing a hydraulic puller, it is necessary to take into account the following parameters:
- the magnitude of the force of the hydraulic system;
- maximum removal and length of the working rod;
- type of fixation;
- the ability to install attachments of various diameters for removing bearings of any size;
- rod extension. Necessary if the standard length is not enough to complete the job.
Assembly
A do-it-yourself jack press looks step by step as follows.
The jack must be installed on the main (main) press blade. The correct installation will be indicated by the parts of the jack tightly resting on the canvas.
Afterwards, we install a metal rod in the middle. The entire operation of the press will depend on how you install it. Its dimensions should correspond to 45-30 millimeters when rotated to one side.
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Then we weld 2 metal corners on the sides of the press. As a result, you should end up with a structure that looks like a rib. To make the press more stable, you can weld a massive metal plate to its base.
As practice shows, this work cannot be done without additional emphasis. Making it will not be difficult. You need to take the metal corners and carefully weld them to each other so that an even square is created.
Then take another corner and weld it in the center so that it connects to the two edges. During such work, the use of a protective mask or goggles is absolutely necessary, so do not ignore safety precautions.
Assembling a block with a threaded rod
I picked up two pieces of 50x100 mm board that will hold the threaded bar. Using a circular saw, I cut grooves in them for the threaded rod, then inserted a threaded strip and tightened everything with self-tapping screws.
I screwed the threaded rod from the jack into the block. Then I glued one of the furniture fronts to it so that the top was flush with the work surface.
Photo of a press from a jack with your own hands
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Working and Application Scope of Hydraulic Bearing Puller
Using pullers, parts pressed into various units are dismantled. Most often, these devices are used at service stations to dismantle bearings. During the removal process, a lot of force is applied, so the design is supplemented with a hydraulic system. Complex structural elements must be removed under certain conditions, the most important of which is to preserve the original shape and prevent damage. Therefore, a hydraulic bearing puller is used to perform such work.
The hydraulic system of the device acts on the support rod. To fix the puller relative to the part being removed, different support platforms are used:
- clamping claws;
- sites;
- other.
First of all, a hydraulic puller is installed on the structure with a bearing (another element), and then the rod is positioned. The hydraulic system provides pressure on the part being removed, and it is squeezed out of its socket.
Our device allows you to remove the following structural elements:
- bearings;
- pins;
- bushings;
- gear transmissions;
- couplings;
- brake discs;
- crankshafts.
Pullers are used at car service stations and repair shops. They are quite simple in design and can work without electricity , compressed air, etc.
Exploitation
Before use, read the instructions and assemble the device correctly. Correctly position the rod relative to the bearing or other element to be removed. For this purpose, the puller has special devices. More often, three-legged clamps are used, acting as a stop. After securing the paws, the position of the working rod is adjusted.
Then do the following:
- Check the reliability of the puller's fixation.
- Using the working fluid injection system, pressure is created in the cylinder.
- When the rod moves, check its position relative to the pressed part.
- Monitor the pressure on the bearing, systematically checking its integrity.
- After dismantling, the rod is returned to its original position.
To maintain the device in working condition, the level of the working fluid is checked, and rubber seals and bushings are periodically replaced.
Do not exceed the rated operating pressure in the hydraulic cylinder when using additional mechanisms!
Source: https://tokar.guru/instrumenty/osobennosti-konstrukcii-gidravlicheskogo-semnika-podshipnikov.html
