How to make a bike ratchet

Removing the Ratchet from the Bicycle

How to disassemble the ratchet is clearly demonstrated in the following video:

How to Make a Bicycle Sprocket Ratchet wrench at Home. | DIY

Ratchet puller

When pedaling, a fairly large torque is transferred through the chain to the wheel axle, in particular, when driving downhill. With exactly the same force, the inside of the ratchet is threaded to the rear wheel hub.

It always takes a decent amount of effort to unscrew a long-established nut, which can only be transferred with prepared tools. These tools include a slotted bushing-like puller and a large wrench.

The ratchet remover cannot be replaced with a similar but cassette-specific attachment. They should not be confused as they have absolutely incompatible splines.

How to disassemble and remove a ratchet on a bicycle

The bicycle ratchet, popularly also known as the nut, is a ratchet mechanism that allows you to reliably transmit torque through the chain from the pedals and at the same time coast freely without the need to pedal continuously. This mechanism is assembled as a single piece with the rear wheel hub. Consists, in fact, of the ratchet itself in the form of a toothed drum with two pawls and a non-separable cassette of sprockets.

Simple maintenance of the bike transmission boils down to cleaning it from dirt and grass that gets clogged between the sprockets.

You will need to remove the ratchet from the bike in the following cases:

  • To adjust the tightening of the rear wheel hub bearings. You can not remove anything, but with the cassette of sprockets unscrewed, it is much easier to remove the ball bearings, determine the degree of wear of the cup, lubricate the assembly.
  • If possible, to replace broken dogs. Although such small parts are not sold individually, and most often you will need to buy the entire assembly, they can be removed from the old ratchet. Unfortunately, there are times when, as a result of the premature death of the dogs, the drum with asterisks either gets jammed, or it starts to rotate freely in both directions.
  • When the teeth of the smallest stars are worn out to the extreme or if one of them breaks.
  • To install the spoke into the rear wheel hub on the right side, to replace the broken.

The difference between a ratchet and a cassette

Do not confuse a bicycle ratchet with a cassette, as they are not interchangeable. Currently, the former can only be found on old and very cheap bicycles. On modern bicycles, a more advanced part is used, such as a cassette.

The main drawback of the ratchet is its incompatibility with the 15 mm diameter hollow shaft of the new QR15 standard. Loose loading from off-center sprockets can cause local bending on the hollow axis.

On the inner part of the ratchet there are ratchet pawls, on top of which an outer sleeve with sprockets is installed. The role of the nut holding these two parts is played by the cone, which is the working surface for the ball bearing. Inside there are two bulk bearings, each of which is assembled from balls of the same size.

The hidden part of the ratchet. the inner sleeve. is screwed onto the threaded part of the rear wheel, and to remove it, you need a special puller.

Unscrewing a stuck ratchet

It so happens that there is not enough effort to disrupt a rattle that has been tightly tightened for several years. In this case, lengthening the key lever will help.

Many in the garage will find an iron pipe or bar about 60 cm long.Then, you can simply put this pipe on the handle of an adjustable wrench or the tooth of an open-end tool, or do a tricky thing and assemble a two-arm lever.

  • Take a couple of short, 6-8 cm long bolts M8 or M10 and pick up two corresponding nuts for them.
  • Insert one of the bolts into the hole in the ratchet puller, and thread the other through the hole in the handle of the adjustable wrench. These bolts should be secured with nuts to hold them in place.
  • We insert the pipe between two bolts: the puller installed in its place and the adjustable wrench put on it. Now all that remains is to push the resulting lever down to disrupt the ratchet.
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Usually with a lever from 50 to 60 cm, any rattle is unscrewed in almost one motion.

Removing the ratchet from the bike

In order to dismantle the ratchet, you need to perform a certain action algorithm:

make, bike, ratchet
  • Removing the rear wheel.
  • We take out the axle from the bushing.
  • We put the wheel in a vertical position and rest it against the wall.
  • We insert the puller into the ratchet and use a large wrench to twist it. It is very important to carry out circular movements counterclockwise.
  • We disassemble the ratchet mechanism. To do this, the flare nut must be turned clockwise.

How to remove a bicycle ratchet correctly?

The ratchet is a mechanism that is inextricably linked to the rear wheel hub. It removes the need to pedal without stopping and transfers torque from the chain to the pedals. The ratchet is quite easy to maintain. It just needs to be cleaned of dirt and grass as needed. However, in some cases it becomes necessary to remove the ratchet.

Let’s take a closer look at what the correct algorithm of actions looks like.

What to do if the ratchet is stuck?

If the ratchet has been in operation for more than two years, it may stick tightly to the bushing and it will not work to unscrew it with a standard puller. In this case, you will need a two-arm lever. You can do it yourself. To do this, it is enough to find an iron pipe up to 50 centimeters in size and connect it with an adjustable or open-end wrench. Then you perform the following manipulations:

  • We take two short bolts with their corresponding nuts.
  • One bolt is inserted into the handle of the adjustable wrench and the other into the ratchet puller. They are fastened with nuts for secure fixation.
  • We will have a mechanism called a two-arm lever. Press down hard until we feel like we have ripped off the ratchet.

If you did everything correctly, it will take you no more than a few minutes to remove the ratchet.

Required tools

Before proceeding with the removal of the ratchet, make sure you have all the necessary bicycle tools in stock. It:

  • Adjustable wrench
  • Wrench
  • Ratchet puller
  • Rozhkovy key
  • A dry, clean, lint-free cloth
  • A hammer
  • Liquid lubricant

Do not confuse ratchet and cassette. These are completely different components and you should not think that they are interchangeable. The main feature of the ratchet is the inner bushing, which is screwed onto the threads of the rear wheel. That is why in order to remove this component, you will need a special puller, which we talked about above. Do not confuse this tool with a cassette remover. Unlike universal tools, they have completely different splines and are designed for specific components.

How to properly repair a ratchet?

After disassembling the ratchet mechanism, examine the condition of the oil inside it. If it is too dark in color with a clear presence of metal particles, most likely the bearing surface has worn out and there is a need to completely replace the entire assembly. You can pick up a new one in the section “Bicycle Cassettes”.

If the ball bearings of the ratchet have various dents or other damage, be sure to replace them with new ones. When assembling the ratchet, thoroughly dry the interior surfaces from moisture. For this, a regular household hair dryer or compressor is suitable. Do not be stingy when tightening the flare nut, otherwise backlash cannot be avoided.

In maintaining the bike, it is very important to take care of all its components, so do not delay the repair and carry out the necessary work on time!

Of those components that are most often subject to wear and tear and require systematic intervention, the carriage can be distinguished. It is on this detail that we will dwell in more detail.

One of the most important parts of your bike is the rear wheel hub. Therefore, you must be ready to carry out repair work if necessary.

Experts recommend carrying out this procedure after each trip through contaminated areas.

The drivetrain plays a very important role in the operation of the entire bike, so you must carefully monitor the wear of its individual parts.

Ratchet Mechanism

In order to install disc brakes on a bicycle, you can go to any bike workshop, or carry out this process yourself.

Bicycle ratchet

A bicycle ratchet is a mechanism that transfers torque from the front sprockets to the rear wheel. Including thanks to this mechanism, movement occurs. It consists of their ratchet and stars.

Due to this special mechanism, the bike continues to move at the moment when you go down the mountain or coast without pedaling. It’s very convenient, won’t you agree? It would be hard to pedal all the time, even when you don’t really need to. To do this, a ratchet was placed inside the rear sprocket block.

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Repair and installation

Ratchets began to be installed back in the days of the Soviet Union and continue to do so to this day. Traditionally, the ratchet is screwed onto the rear hub of the bicycle. But in newer models, the ratchet is an integral part of the hub initially. The collection and analysis of this mechanism is not that difficult, but also not entirely simple. Installation generally takes place without any problems. It is enough just to turn the pedal a little and the ratchet will fall into place.

But with the removal you will have to tinker a little. Stock up on a special tool called a slotted puller. The slot models of the ratchets depend on the model of the ratchet itself. Older models have a simplified cut and two or four edges. But, unfortunately, such systems are not durable and often break down, not even withstanding the season. And during the replacement process, there is a chance to easily break both the ratchet itself and the tool you will be using, the most common of which is the breakage of the pawls or springs. In order to fix the breakage, it is necessary to disassemble the ratchet.

If the springs are defective, they must be replaced with new ones. You can remove old springs with ordinary pliers. Oddly enough, it’s better not to try to fix a broken dog, but to replace it with a new one. This attribute is made of durable steel with the help of the skilled hands of locksmiths and their machines. First, the heel rod is made, and only then the dog is sawn out along the contour of the depression. The angle of the so-called tooth in the dog should be made a little sharper than the angle of the ratchet itself. Well, then the process of hardening the steel and the release of these parts to the masses follows.

The ratchet does not cling to the dog, usually in two cases:

  • The sting at the dog’s tooth has become unusable;
  • A very thick grease is used. Because of this, the spring does not push the dog away from the bottom of the cavity.
make, bike, ratchet

Why does my bike make a clicking sound when I am not pedaling?

What parts are the first to fail

Along with scheduled maintenance, unplanned breakdowns occur, called natural wear and tear. Parts that have become unusable must be replaced.

You need to pay attention to the following details:

Ramu. Loss of rigidity leads to deformation of the frame, which can even crack due to excess accumulated stress. During aggressive skiing, cracks are inevitable, so it is imperative to monitor the condition of this part.

Bearings. This is another part that wears out quickly and requires replacement in the first place. Bearing wear concerns the ratchet, rear derailleur, pedals. Longer service life for bearings, rear suspension and steering column. The emerging extraneous sound and changes in the operation of the mechanism help to detect the problem.

Wheels. Since the load on them is maximum, wear occurs faster than other parts. Spoke stretching is a common problem, resulting in deformation of the bike hub and hub axle, resulting in riding problems.

Transmission. How easily the bike moves depends on the condition of the chain. If it is dirty, worn out or stretched, the vehicle will not be able to work adequately

The chain must always be clean and lubricated, so it is adjusted as needed or replaced with your own hands or with the help of a wizard.

Suspensions. If signs of wear appear. oil traces due to leakage of sealing rings or oil seals, loss of elasticity during driving, changes in the color of the spray on the legs, attention should be paid to pneumocars and springs. It is necessary to check the integrity of the bosses and anthers.

Brakes. Often, faulty brakes, or rather, failed pads, cause accidents, as well as air trapped in the hydraulics and contaminated caliper pistons.

Do-it-yourself bike repair at home will extend the life of the vehicle and make the ride safe and comfortable. Do-it-yourself bike repair at home for many is a way that helps to feel their worth and independence, it becomes an interesting hobby and useful.

What is a ratchet?

Ratchet is a ratchet mechanism consisting of a freewheel, sprockets and a threaded ring. The design transfers rotation from the pedals to the wheel through the chain, while simultaneously allowing movement without the need to pedal. It is screwed onto the threads of the axle of the rear hub of the bicycle. If the sprockets wear out, they unscrew and change completely to new ones.

Cassette and ratchet should not be confused. In modern bicycles, they began to use a cassette. a device more advanced than a ratchet. The design consists of stars assembled together, which are put on the sleeve and secured with a nut, and the holes in the middle are equipped with grooves with which it clings to the drum. Inside the drum there are pawls, springs and a ratchet. It is easier to remove the cassette and replace the unusable sprockets with new ones. It can be easily dismantled in any conditions, and the removal of the ratchet is best done on a workbench. This requires not only a special tool, but also significant physical effort. The impossibility of repair is its main drawback. Plus a small number of stars and fragility.

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It just works. The system has a pawl that engages the rear of the transmission mechanism, at which time a slight crackling sound is heard. From this cod comes its name. If there is no sound, it means that it will pull the chain forward when the pedals do not rotate.

Puller and key

Removing a long-established ratchet requires considerable effort. It can get stuck and rusty. There must be special tools available, which are a puller and a large adjustable wrench or wrench.

The puller is a slotted wrench for disassembling or installing the ratchet mechanism. It is unscrewed counterclockwise using a wrench or adjustable wrench. Ratchet and cassette tools are similar but completely incompatible, do not confuse them.

When removing, there may be a problem in the lack of effort to unscrew the stuck mechanism. This problem is solved by lengthening the tool. This can be done with a small tube. Take two bolts 6–8 cm in size and select the nuts for them. One is inserted into the hole in the puller, and the other into the hole in the handle of the adjustable wrench. Clamp with nuts. Insert a tube between the bolts. It turns out a lever with which it is much easier to rip off a stuck device.

Drop in frame stiffness

After some time, the frame necessarily accumulates fatigue stress, which leads to a drop in rigidity. The drop in stiffness values ​​is considered to be especially noticeable among hardtails, since the rear axle does not have any shock absorbers.

make, bike, ratchet

Accordingly, all vibrations that arise directly during the ride are transmitted to the bike frame directly. Metal gets tired much faster here. As for two-hangers, they are subject to this phenomenon to a slightly different extent. Stresses predominantly accumulate in the area of ​​the rear suspension hinge, which acts as a stress concentrator.

What is the risk of changing frame rigidity parameters? First of all, the geometry of the frame is distorted as a result of the excessive accumulation of fatigue stress. The deformed geometry of the frame does not correctly perceive the loads from unevenness, therefore, the risk of cracks and ruptures in the joints of the frame nodes increases.

Most often, cracks appear on the feathers, dropouts (places where the front or rear wheel hub shaft fits), in the area of ​​the weld passage on the bottom bracket and head tube.

There is no escape from the drop in frame rigidity, except to keep the bike on your balcony and not go anywhere. Careful driving can help prevent fatigue from building up too quickly.

Ratchet puller

When pedaling, a fairly large torque is transferred through the chain to the wheel axle, in particular, when driving downhill. With exactly the same force, the inside of the ratchet is threaded to the rear wheel hub.

It always takes a decent amount of effort to unscrew a long-established nut, which can only be transferred with prepared tools. These tools include a slotted bushing-like puller and a large wrench.

The ratchet remover cannot be replaced with a similar but cassette-specific attachment. They should not be confused as they have absolutely incompatible splines.

What is a ratchet?

If you frequently repair and service your bike, you might be wondering what is the difference between a cassette and a ratchet on a bike? The second is an integral part of the vehicle’s transmission, designed to change the pedaling effort. All modern ratchets are made of steel, since aluminum models tend to wear out, and given the pricing factor, the installation of this component is unprofitable for the manufacturer.

The cassette is installed on the bushing, it already contains a drum with pawls, which slides along the body when rolling. In other words, there is a mechanism inside, consisting of dogs (hooks), which, when the pedals are scrolled, catch on the protrusions on the body. When the cyclist stops pedaling, the force on the pawls is reduced to zero, causing them to slide over the toothed body. Removing the cassette yourself is much easier.

Interesting to know! The ratchet is installed only on budget bushings, consisting of two bearings and a shaft. Cassettes. on a special drum, in which there are two bearings.