How to remove a chuck from a Makita rotary hammer

Disassembling a Makita 2450 Peorator Barrel

Dust, dirt and moisture can make the internal lubricant eventually become hard and does not do what it is supposed to do. Clutch starts to operate with an unusual noise. When you begin repairing your peorator, be sure to read the included instructions for disassembly, lubrication, and assembly of the Makita 2450, 2470 peorator assemblies. The diagram of the Makita 2450 and 2470 peorator will help you properly disassemble faulty assemblies, find defective parts. And also tell you how to disassemble the Makita 2450.

The Makita 2470 is disassembled starting with the removal of the mode switch knob.

The chuck and what it does on the machine

The main purpose of the chuck on the power tool is to hold the attachments while performing the corresponding work. This part is also called the actuator, because through this device is the transmission of torque, as well as reciprocating manipulation of the tool gearbox.

The chucks on rotary and power drills are different, although their purpose is almost the same. The drill, like the screamer, is approved for use in drilling holes in concrete bases. The power tool in question is excellent for tasks such as drilling holes in wood or metal by switching the tool to drill mode. But not many people know why a drill is fitted with a collet device, but not with a drill bit.

So, the drill is used to drill metal and wood. Impact drills have a primitive percussion mechanism in their design, which is why the tool also copes with strong concrete bases. To drill metal and wood, there is no need for the attachment. the drill bit. to move in the actuator or vibrate. This is why concrete drilling with a drill is not as efficient as with a torch.

Drill chuck for the torch chuck

Peorator chuck mechanism does not allow for easy attachment of working tools. These nozzles are not fixed as in the collet mechanism, so they move a certain distance when working. This makes it possible to achieve high efficiency in crushing concrete substrates. The impact does not affect the cartridge itself, but only the working nozzle. The result is not only fast, but also much easier to drill in concrete.

On the considered power tools different types of chucks are mounted, so before you buy a new actuator for your power tool, you need to clarify their classification. How to make a replacement, we will consider in detail in the article, and to buy a chuck for peorator you can in the online store “Cylinder”. Our store operates all over Ukraine, so you can order chucks for rotary tools right now, selecting the appropriate models, and order delivery to your location.

Problems of chuck mechanism

In a modern drill, such as the Interskol or Makita, the drill bit or other accessories are held in place by a cam-type chuck: 3 or 4 cams hold the cutting tool securely and can only be moved along the axis of the drill shaft. The quick-release chuck is adjusted manually, the more complex designs used in modern drills are adjusted with a wrench.

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jamming of the jammed bit can occur during use, the reason is the excessive wear of the jaws over time. Repair of the tool is made as follows: it is necessary to remove the device from the shaft, the same actions are necessary when the drill jams, because it can be removed only after complete disassembly of the chuck part of the product.

It also occurs when a chuck rotates in relation to the tool shaft. The reason for this behavior is damage to the threaded part of the device mount, or the seating cone has sagged. The way out is to change the chuck for a functioning analog.

Tips

Proper care and periodic cleaning will increase the tool’s life considerably. To reduce the risk of malfunction, it is important that you observe a few rules of thumb when operating the unit.

  • Inspect the chuck and chuck combination before you start to use it.
  • Clean any dirt off the machine when you are finished working. You can use an air blast, such as from a vacuum cleaner.
  • If it is necessary to transport the power tool during cold weather, allow it to warm up before using it (the grease must thaw).
  • Follow the standards of operation given in the manual.
  • Keep your tool in a warm, dry place.
  • Keep moisture and condensation out of the air.
  • If you don’t use the machine for a long time, store it in a plastic and cardboard box.

On how to troubleshoot a Makita peorator, see the following video.

Removing the chuck from the chuck

First try to find out which chuck you use in your rotary tool. Chuck can be cam-operated, collet-operated SDS, and quick-action chuck. The latter is available as a single- and double-barrelled cartridge. Drill bits in cam chuck are fastened with a wrench, but not with SDS collet, quick-change chuck. To change a drill bit in an SDS collet chuck, you only need to twist it.

Cartridge replacement on the peorator should begin with a study of the fasteners. It is held by a screw rod or a spindle. It is almost always easy to remove the cartridge. But from time to time there is a tougher fixation that requires patience as well as additional tools. Firmly fixed chuck can be removed with a hammer, wrench and screwdriver. The removal is done as follows:

  • The chuck can be removed by tapping on the head of the screw to loosen it;
  • Unscrew it with a screwdriver;
  • clamp the chuck in the key/jaw and turn the spindle.

Repairing the Peorator Chuck

A couple of parts of the chuck can be replaced with similar parts: a worn ball, a rubber gasket and a spring that has lost its original characteristics, such as flexibility. Sometimes, e.g. if the bit jams or jams, the tip of the spring slips out of its seat.

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When the other components are worn, there is little or no repair, the cartridge must be replaced with a new one. The ball and spring will not be found in tool stores or construction stores, but in service centers where devices are serviced and repaired. Another option is to order the spare part from a Chinese marketplace. It is often easier to replace the cartridge with a new one than to repair it. It’s a little more expensive, but it’s safer and faster.

How to disassemble the cartridge

When the cylinder is removed from the electric screwdriver, you can begin disassembly. The first step is to remove the plug in the base. For a plug made of plastic, a careful prying with a knife is enough, but the metal part needs to be knocked out by hitting the base of the chuck with a manual twist.

This requires a large bolt. It is placed in the cartridge case and lightly jammed with the cams to center it. At the same time, it should not get stuck, and freely walk back and forth. The head of the bolt should protrude from the cylinder by 2-3 cm. Then the bolt is struck with a hammer lightly, but accentuated, and then the metal plug is removed.

Next begins directly dismantling the chuck of an electric screwdriver. The construction of any cylinder consists of unchangeable basic parts:

What are the chucks of screwdrivers and drills

Regardless of the fact that the designs of rotary screwdriver chucks are quite similar, it is customary to divide them into several types:

The first two types have a similar structure and design. The second version is considered automatic and begins to function as soon as it is placed on the device. As for differences in the number of couplings, the use of single-coupling designs is rational only on models that have a locking. These elements are clamped with one hand.

The double-clutch chuck type for high-powered drills or screwdrivers is suitable if the tool does not have a locking mechanism. It is necessary to fix the bit with two hands. Quick-action and self-clamping chucks are used on modern machines. For example, on those that have a pneumatic operating mechanism.

Key types of nozzles are suitable for some outdated models of electric equipment, however, they are considered to be much safer, as they are resistant to serious shock loads. These chucks are also suitable for appliances that are used regularly and for extended periods of time.

Disassembling the Gearbox

To reach the mechanics, you need to remove the plastic housing.

To disassemble the mechanics of a Makita rotary tool, you first remove the black plastic protective housing. The housing is removable after you remove the four screws that hold the housing in place at the end. Pressing on the end of the shaft presses the gearbox out of the housing.

Having removed the housing, it is necessary to separate the rotor from the gearbox. The gearbox is referred to as the common mechanical part. Separating the rotor from the machine part (gearbox) is quite simple. Clamp the gearbox with the right hand and the rotor with the left. Pull both parts in opposite directions while rocking. The rotor is held in the gearbox by the friction of the helical gears. The main malfunctions of the Makita beater occur in the mechanical part of the tool.

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The most common failure of the mechanical part is failure of the beater assembly.

Disassembling the striking mechanism The striking mechanism is assembled on the inner housing and consists of the gear shaft and the intermediate shaft. The rotary motion is transmitted through helical gears to the intermediate shaft.

The gearbox shaft is a hollow shaft with a free-floating cylinder.

The small spur gear on the intermediate shaft transmits rotation to the large spur gear on the gearbox shaft where the percussion mechanism is mounted. And the translational motion on the percussion gearbox shaft is simultaneously transmitted from the rolling bearing of the intermediate shaft to the cylinder that moves in the barrel of the gearbox.

Proceed to intermediate shaft disassembly.

Disassembly of intermediate shaft

On the shaft pos.40 is mounted on the helical pinion pos.42, on which rotation from the rotor pinion is transmitted, roller bearing 608zz pos.41, which transmits reciprocating motion to the joint pos.34 piston pos.32. Clutch clutch is mounted on the other side of the shaft pos.39, spur gear item 10.80, compression spring pos.38, circlip S-7 pos.37, bearing 606zz pos.36 Special attention should be paid to the state of roller bearings. The rotator has imported bearings. Russian bearings may be used. bearing 606zz can be replaced by 80016, bearing 609zz replaced by 80019.

Disassembly of the striker shaft

Disassembling the impactor shaft Disassembling the barrel of a Makita 2470 is a simple process if you use the schematic diagram of the Makita impactor. The shaft is a barrel pos.21, where the hammer mechanism is assembled. The barrel is fitted with a pinion pos.19 which is pressed by the spring pos.18, through the washer pos.17 and is secured by a retaining ring pos.16. In the barrel moves the cylinder pos.32, acting on the striker pos24. There is a metal ring, pos 1819, mounted at the back side of the striker.27, transmitting the shock to the auger. And when you need to replace the peorator barrel?

The most common failure is the metal ring. Firing pin Cylinder and firing pin

Disassembly taken care of. Replace the parts with the serviceable ones and get ready for reassembly. on the lubrication and assembly of the peorator.

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