Puller for removing the bearing race. Puller

When repairing electric motors, in addition to open-end wrenches and a set of heads, you must definitely have in your arsenal several pullers to tighten the bearings.

One universal is simply not enough. If you have electric motors from 1 kW to 100 kW on your site, then you need to have 2-3.

I have two bearing pullers in my arsenal. Now there is a large selection of pullers on the markets, and you can buy them. But if there is material, a lathe, gas and electric welding and a desire, then the puller can be made with your own hands. And I assure you, it will serve you even more than a dozen years.

It is imperative to make three-arm pullers: they are the most convenient. I will also indicate the dimensions of my pullers, which have long been tested during repairs. Let's start with a small one, with which you can remove bearings from 202 to 308 sizes, large 317 and more. We need sheet metal 10 mm thick and

metal round timber with a diameter of 30 mm (for a large one - metal 15 mm and round timber with a diameter of 50 mm).

First of all, we make a drawing (pattern) of the legs of the puller. We make the length of the legs 200 mm (at the end of the article in PDF format I will post patterns for the legs of small and large pullers). Next, on the sheet metal on the pattern, we apply a drawing. It is necessary to cut the paws with a gas cutter (propane and oxygen). After cutting, we process the blanks on a large emery.

Gradually bring the size of the three paws to the same. There is no need to achieve too ideal dimensions, a difference of 1 mm will not make a negative role in the design. When the paws are made and fitted, in the upper part we drill two holes (for a small expansion of possibilities) with a diameter for bolts of 8 or 10 mm (for a large 12 or 14 mm 3 holes) for attaching the paw to the core of the puller. We do the same with the two remaining paws. We drill holes in them along the first foot, using it as a template. Here we must try to disagree in size to prevent the capture of the bearing being removed at the same time. Here is a brief about the manufacture of puller legs.

The next detail is the core. For the core on a small puller, we need round metal with a diameter of 30 mm and a length of 35 mm (for a large one, respectively, 50x45 mm). In the workpiece, we drill a hole for a thread of 16 mm (for a large puller in its workpiece, a hole for a diameter of 30 mm) and cut the thread, preferably with a fine pitch. In the prepared part for the core, we apply markings, three marks at 120 degrees. And to these places we weld two by electric welding on the marks of the holder of the legs (the distance between the holders should be as thick as the foot). I think there is no need to describe in detail how to prepare them, since there is no need to adhere to any strict rules and sizes. After welding, we process this part on a large emery. Now, having tried on the paw, we drill holes in the holders. Holes should be drilled off center so that the installed tab has good side play to grip larger bearings.

And the third part of our puller is the screw. On the first puller we make it 350 mm long, the thread length is 280 mm, on the second - the length is 500 mm, for the thread 420 mm. Next, on a lathe, we process the blanks and cut the thread. In the upper part of the screw, where there is no thread, we drill through holes with a slight offset in height and perpendicular to each other. These are holes for mounting or a collar. Diameter is up to you. The beginning of the screw can be narrowed in diameter for a small distance. I do not describe the details. Everything can be seen in the photos.

We made these pullers with a locksmith over 12 years ago. I have had no problems all these years with the removal of bearings and half-couplings. And most importantly, the quality turned out to be Soviet-era. Here is such a necessary tool you can easily do it yourself.

Very cool and useful item. Puller for bearings. Useful pipe, iron plate, large washer, bolt, nut.

To begin with, we mark on the pipe the size that needs to be sawn off. Weld the washer to the resulting segment. We put the nut exactly on the hole and weld it. Let's clean the bumps with a grinder.
Measure 1.5 centimeters, make a cut. On the other hand, it's the same. Cut off two small pieces from the plate. They will be inserted into two slots. Got a puller.

How does this tool work? We put on a bearing. We go behind him two records. We turn the bolt. It rests on the shaft and pulls the bearing off it. With this tool, you can easily remove it from the generator and electric motor. The outer diameter of the part must not exceed the inner diameter of the pipe.

Video AVTO CLASS.

Second idea

Airat Valiakhmetov, the host of the youtube channel of the same name, developed his original idea. In the store, such tools are not cheap. So I decided to do it myself. I took a metal strip 30 wide, 4 mm thick. Cut it into strips. Welded. Plates. Hooks to grip the bearing. Two cuts are made with a grinder. Two nuts are inserted and welded on. I took the worm from an old Soviet clamp. Hardened steel. To make the tool universal, I made 4 holes on each side. Can be set to any width. If necessary, the paws are pulled out, turned over to the other side. You can pull out the bearing.

When repairing the steering and running gear, almost every car owner is faced with the problem of removing ball joints (tie rod ends), which is rather problematic to solve without a special tool.

The reason is the design features of these elements: their fingers have a cone-shaped shape, with which they enter the seating sockets, over time, the place of this entry becomes dirty, oily, rusty, making the connection of the surfaces too tight, almost uniform, that is, one that cannot be separated by simple physical action . We need an assistant - a ball bearing puller - a tool that greatly simplifies pressing out.

It is not difficult to become its owner: to do this, you need to go to the nearest car dealership and purchase it there or make a do-it-yourself ball joint puller using any of the methods below, which we have grouped depending on how force is created in them.

Screw pullers.

The force in these types of pullers is created by screwing the bolt into their body: the tool body is put on the eye of the ball joint, the bolt rests against the finger and, when twisted, presses it out of its seat.

These types of pullers are quite compact, therefore they are considered universal, that is, suitable for any car, although such mechanisms are most popular among VAZ owners.

Consider how to make a do-it-yourself ball bearing puller using examples of screw options.

Option number 1 - screw expanding.

1. Take a 7-centimeter 4- or 6-sided rod with turnkey edges of 17 or 19.
2. Using a drilling tank, make a hole inside its body and cut a thread for an M8 bolt.
3. Screw this bolt into the hole prepared for it. The puller is ready.

How it works, we will explain using the example of pressing out the upper ball joint of the "seven".

1. Unscrew the lock nut. We twist, but do not remove.
2. Between the fingers of the supports we install the made puller, the bolt in it is screwed up to the stop and rests with the cap on the finger that needs to be pressed out.
3. We take 2 keys: with one we hold the puller body, with the second we unwind its bolt. We unwind until the support pin is pressed out of the socket.

If it is necessary to dismantle the lower ball joint, all actions are done in the same way, only with the puller turned upside down.

Option number 2 - screw L-shaped.

1. Take a 15-17 cm round metal bar with a diameter of 10 mm or more. Using a vise and a hammer, bend it with the letter "G" (the length of the short arm should be 5 cm).
2. On the long arm of the workpiece, cut the thread and match the nut to it.
3. Take a metal plate half a centimeter thick and cut a hole in it for the support pin using the wedge puller technology (it will be shown below).
4. On the thickened part of the wedge, opposite the slot, make a hole for the L-shaped blank and thread the long part of the rod into it, only after that screw the nut onto the “improved” rod. Do not tighten too much - the wedge-shaped insert should have a good stroke.

1. Insert the plate into the gap between the eyelet and the support. The short arm of the L-shaped element should rest against the finger.
2. Start tightening the nut and do this until the finger is pressed out.

Option number 3 - a screw puller of ball bearings, made from a corner.

1. Take a 7-8 cm metal corner, half a centimeter thick, maybe a little less.
2. On one side, make a cut; with this cut, the tool will be attached to the eye.
3. From metal plates equal in thickness to the metal of the corner, cut out 2 identical triangles and weld them on the sides of the corner.
4. Take a 17 nut, pick up a long bolt to it, weld spacers to this nut on both sides, they will help to position the puller bolt on the same axis with the support pin in the future.

1. Screw the bolt into the fixed nut and wring out the finger using the technology described above (in other types of screw pullers).

As you can see, to create a ball joint puller, you can use almost all available materials, the main thing is to understand the principle of operation, a drawing will help you:

Lever pullers.

Lever pullers are a tool consisting of a pair of levers connected to each other in the middle. Also on the one hand they have a coupling bolt. In the process of acting on the ball joint, this bolt is unscrewed, bringing the ends of the levers together, one of which is located between the support and the lug, the second is under the finger.

Such pullers are also quite effective, but they are larger, so they may not be applicable everywhere.

wedge type puller.

The simplest in its design, but it also copes well with the task assigned to it. To make it you will need:

• take a small metal plate (enough size for a matchbox);
• using a grinder (angle grinder) / machine with an abrasive wheel, give it the shape of a wedge, the resulting workpiece in profile should take the form of a triangle;
• with the same grinder, starting from the upper corner of the triangle, it is necessary to make a vertical cut in it 2/3 of its height, a little wider than the diameter of the ball joint pin;
• to facilitate working with the tool, it is recommended to weld a metal rod to the middle of the base of the wedge, although this may not be done if you do not have such a rod at hand.

Here is such a kind of bracket you should get in the end.

1. insert the wedge just made between the ball body and the eye;
2. hitting the rod (the base of the wedge) with a hammer, drive in the homemade support puller until the finger pops out of the socket.

IMPORTANT!

When using this type of puller, there is always a risk of damage to the anther, therefore, such a tool can only be used in the event of a planned replacement of tips or supports. If the repair of the steering mechanism or suspension does not provide for such a replacement, it is better to refuse a wedge-type puller.

Puller directly ball bearings.

It is used for cars (Citroen, Peugeot) whose ball joint is screwed into the lever. And since it is screwed in and not pressed in, it is not practical to use the above tool options, you need a special puller, which we suggest you make from an 8 cm thick metal pipe for 2.

1. On one of the ends of this pipe, equidistant from each other, using a grinder or a hacksaw, make 4 rectangular spikes 5 × 7 mm.

1. On the second end, with the same tool, again, equidistant from each other to a depth of 3 cm, cut the slots so that in the end you get 8 petals.
2. With a hammer, slightly bend these petals towards the center of the circle, thereby reducing its diameter.

1. Take a 24mm nut and weld it to the tapered side of the workpiece. Do-it-yourself ball joint puller is ready.

It is easy to use: put it on the support so that the spikes enter the existing grooves of the ball body, then turn the welded nut with a 24 wrench, thereby dismantling the suspension element you need.

Video.

Such an element as a bearing is used in many units and mechanisms. It can also be found on the car. For example, this or a hub element. In any case, a puller is required to dismantle it. The bearing is very tight. It is extremely difficult to extract it with improvised means. Therefore, today we will consider what bearing pullers are, their dimensions 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 way to turn the central bolt). Some devices are equipped with a hydraulic cylinder (for example, bearings, as in the photo below).

Also in the design there are grips. They are of two varieties:

• Grippers that are engaged with the object to be retrieved using a special tool. They work independently of the action of the bolt.
• Pressing the part due to the force of the bolt or

The material from which the puller is made

The bearing is a part that is quite difficult to remove. Therefore, puller manufacturers use only high-strength alloyed materials. Responsible nodes in these elements are formed by forging. As for power bolts, they have a higher strength than those used in conventional threaded connections.

Kinds

There are several types of these tools. All of them differ in the type of capture. He might be:

• Sliding.
• Rotary.
• conical.
• With separator.
• Universal.

With regard to dimensions, the inner bearing puller can have a different diameter. On average - from 28 to 200 millimeters. The height of the foot is from 35 to 60 millimeters. Bolt head size - 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 for the grips.

It can be a puller for internal bearings or external ones. To change its purpose, it is enough to rearrange the grips. By the way, their maximum solution is from 10 to 80 centimeters. The device has stops for a power bolt. This prevents the bearing from moving. The set of sliding pullers includes grippers of different lengths. Also the tool is completed with replaceable 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. The grips are secured with bolts. For which vehicles is this bearing puller used? VAZ, MAZ, GAZ, Mercedes - this is an incomplete list of cars on which this tool can be used.

The puller has stops with double-sided grip. There are tools with a tripartite. There are 4 fixing points on the body of the device. Bearing pullers are installed on them. The grip width of the device is from 5 to 7 centimeters. Used to remove small bearings, including dismantling the tip of the battery wires. It can be equipped with a percussion mechanism.

With conical gripper

These tools have 3 jaws and are used in situations where it is required to eliminate load imbalance when dismounting a bearing. Often this type of hydraulic bearing puller is sold.

Centering of captures happens automatically. Also in the design there is a conical nut, which is manually wrapped when installing the tool. On some models it is spring loaded. It has a limited range of uses. Turning the clamps here will no longer work.

With separator

These tools are highly reliable. The element is based on a separator. It is installed under the removed bearing. Both halves of the cage are bolted together for a more secure grip. After that, the pulling part is connected to the tool.

Its side nuts are adjustable according to the position of the cage. The power bolt is driven onto the axis of the part to be removed. 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 bolt threads.

Universal

Pullers universal for bearings are used most often. They also extract other mechanisms. The design is based on a power bolt made of alloy steel. By rotating it, the master creates a dismantling force that is applied to the reference point. Through the central body of the tool, 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

The cost may vary depending on the type, as well as the set of tools that is included in the kit.

The cheapest are two- and three-jaw sliding pullers of a mechanical type. Their price ranges 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:

• Maximum allowable load. This parameter is determined by the strength of the central body of the puller and the power bolt. For mechanical tools, this parameter ranges from 1 to 4 tons. Hydraulic pullers have a force of about 20 tons (but they also have a corresponding price). However, for the dismantling of elements such as a wheel bearing, mechanical tools are sufficient.
• Working move. It depends on the overhang of the power bolt and the length of the grips.
• The dimensions of the puller legs (in particular, the width and height of the stop).
• Minimum and maximum grip opening.

Primitive do-it-yourself puller

This tool can be made independently. A steel pipe is used as the main element. Its diameter should be slightly larger than that of 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 out part of the pipe. On the other hand, a nut with an internal thread is welded. It must match the parameters of your screw. This type of puller is the easiest to manufacture. However, it will only fit a specific bearing diameter.

Making a universal tool

Such a puller will fit different diameter elements. So, we need to make paws from a 10 mm steel sheet. It is better to use pre-prepared templates. They can be made on cardboard or paper, then marked on a metal sheet and cut out with a grinder.

Then you need to pick up the bolt. We sharpen it under a cone. Six lugs with holes are welded to the nut. Our paws will be attached to the latter. Ears are cut out of metal with a thickness of 5 millimeters. The ears are welded to the nut in assembled form. Next, the bolts are unscrewed and the joints of the legs are finally welded. 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 solutions of the mechanical type. They can be used to extract 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.