An element such as a bearing is used in many components and mechanisms. It can also be found by car. For example, a clutch release bearing or a hub element. In any case, a puller is needed to dismantle it. The bearing is seated very tightly. It is extremely difficult to remove it with improvised means. Therefore, today we will consider what bearing pullers are, their sizes and design features.
Device
The main element in the design of this element is the central bolt. It is due to him that the puller works. The bearing is thus squeezed out of the workplace or, conversely, pressed in (depending on which direction the central bolt is turned). Some devices are equipped with a hydraulic cylinder (for example, a hydraulic bearing puller , as in the photo below).
Also in the design there are grips. They come in two varieties:
- Grips that engage with the recoverable item using a special tool. They work regardless of the action of the bolt.
- Clamping part due to the force of a bolt or hydraulic cylinder.
Material from which the puller is made
Bearing is a part that is quite difficult to remove. Therefore, puller manufacturers use only high-strength alloyed materials. The responsible nodes in these elements are formed by forging. As for power bolts, they have higher strength than those used in conventional threaded connections.
Kinds
There are several varieties of these tools. All of them differ in type of capture. He can be:
- Sliding.
- Rotatable.
- Conical.
- With a separator.
- Universal.
In terms of size, the internal bearing puller may have different diameters. On average - from 28 to 200 millimeters. The height of the foot is from 35 to 60 millimeters. The size of the bolt head is from 9 to 22 millimeters.
Sliding puller
It is quite easy to remove the bearing with such a tool. Such a puller has two grippers that move freely along the beam. In the middle of the latter there is a threaded hole. In the upper part, the bolts can serve as clamps of grips.
It can be a puller of internal bearings or external. To change its purpose, just rearrange the grips. By the way, their maximum solution is from 10 to 80 centimeters. The device has stops for the power bolt. This prevents bearing displacement. The set of sliding pullers includes grips of different lengths. Also, the tool is equipped with interchangeable tips. Usually they have the same dimensions (they serve as a substitute in case of failure of the first element).
With swivel grips
They have a different design. Grips are locked with bolts. For which cars is this bearing puller used? VAZ, MAZ, GAZ, Mercedes is an incomplete list of cars on which this tool can be used.
The puller has stops with double-sided grip. There are instruments with a three-sided. There are 4 mounting points on the body of the device. The paws of the bearing puller are mounted on them. The width of the device is from 5 to 7 centimeters. It is used to remove small bearings, including the removal of the tip of the battery wires. It can be equipped with a percussion mechanism.
With conical gripper
These tools have 3 grips and are used in situations where it is necessary to eliminate the asymmetry of the load when dismantling the bearing. Often this type of hydraulic bearing puller is sold.
Centering the grippers is automatic. Also in the design there is a conical nut, which is manually wrapped when installing the tool. On some models, it is spring loaded. Has a limited range of uses. Turn over the clamps here will not work.
With separator
These tools are highly reliable. The element is based on a separator. It is installed under the removable bearing. Both halves of the separator are bolted for a more secure grip. After that, the pulling part will be connected to the tool.
Its side nuts are adjusted according to the position of the separator. The power bolt is wound on the axis of the removed part. The tool can be used in combination with a sliding puller. However, when working with two mechanisms, it is required to monitor the safety of the thread of the bolts.
Universal
Universal pullers for bearings are used most often. They also remove gears, pulleys and other mechanisms. The design is based on an alloy steel power bolt. By rotating it, the master creates a dismantling force that is applied to the reference point. Through the central body of the instrument, this force is transmitted to the clamps. Thus, the part is pulled out or pressed into place. Universal pullers are used for both internal and external bearings.
Price
Cost may vary by type as well as the tool kit that comes with the kit.
The cheapest are two- and three-gripping sliding pullers of a mechanical type. Their price is from 500 to 1 thousand rubles. Hydraulic devices are the most expensive. They are offered on the market at a price of 25 thousand rubles. The cost of universal mechanical solutions is around 10 thousand rubles. The kit includes a set of mandrels.
Parameters
To choose the right bearing puller, you need to know what parameters it must meet. When buying, you should pay attention to the following points:
- The most permissible load. This parameter is determined by the strength of the central body of the puller and the power bolt. For mechanical tools, this parameter is from 1 to 4 tons. Hydraulic pullers have an effort of about 20 tons (but their price is corresponding). However, mechanical tools are sufficient to dismantle elements such as a wheel bearing.
- Working move. It depends on the departure of the power bolt and the length of the grips.
- The dimensions of the legs of the puller (in particular, the width and height of the stop).
- Minimum and maximum grip solution.
Primitive do-it-yourself remover
This tool can be made independently. The main element is a steel pipe. Its diameter should be slightly larger than the clip. So, with the help of a grinder, we cut off a piece of pipe of the desired length. It depends on the size of the screw. Next, by welding, we connect the C-shaped washer to the cut part of the pipe. On the other hand, a nut with a female thread is welded. It should match the parameters of your screw. This type of puller is the easiest to manufacture. However, it is only suitable for a specific bearing diameter.
Making a universal tool
Such a puller will be suitable for different diameter elements. So, we need to make paws from a 10 mm sheet of steel. It is better to use pre-prepared templates. They can be made on cardboard or paper, then marked on a metal sheet and cut with a grinder.
Then you need to pick up the bolt. We grind it under a cone. Six ears with holes are welded to the nut. In the last our paws will be attached. The ears are cut out of metal with a thickness of 5 millimeters. The ears are welded to the nut assembled. Next, the bolts are unscrewed and the connection of the legs is boiled finally. At this stage, the assembly of the device is completed. You can begin to fully use the tool.
Conclusion
So, we found out what types of pullers for bearings are. The most common types are universal mechanical type solutions. They can be used to remove any bearings and pulleys. A puller is a very useful thing in the household. Especially if you own a car. With this tool, you can even perform such a complex operation as replacing a wheel bearing. In services, the cost of this service is from 3 thousand rubles.