How to Disassemble a Puncher 24 70

Recently, Interskol punchers have been especially popular. They are reliable in operation, easy to repair. It is easy to get spare parts on them.

Interskol punchers have a wide model range. The tools are conventionally divided into two segments: perforators equipped with an SDS-plus type chuck, and punchers with an SDS-max type chuck.

Repair of the Interskol punch can be carried out both in service centers and independently. To do the repair of Interskol punchers with your own hands, you must have the skills of a locksmith and knowledge in electrical engineering in the volume of a secondary school.

How to Disassemble a Puncher 24 70

And always remember to comply with safety regulations.

Each tool has a corresponding marking plate. For example: puncher Interskol P-18 / 450Er. Decrypted:

  • the letter P indicates that the tool belongs to the family of perforators;
  • the number 18 indicates that a drill with a diameter of up to 18 mm can be used with this hammer drill;
  • the number 450 indicates the power of the drill in watts.

The range of Interskol punchers with SDS-plus cartridges is presented by 13 models: P-18 / 450ER, P-20 / 550ER, P-22 / 620ER, P-24 / 700ER, P-24 / 700ER-2, P-26 / 750EV, P-26 / 800ER, P-26 / 800ER-2, P-28 / 800EV, P-30 / 900ER, P-30 / 900ER-2, P32 / 1000E, P-32 / 1000EV-2.

Interskol punchers with SDS-max cartridges are represented by the following models: Interskol P-35 / 1100E, P-35 / 1100EV-2, P-40 / 110EV-2, P-45 / 1100E, P-50 / 1200E.

There are other models of Interskol rotary hammers on the market: Interskol P-600 ER and Interskol P-710 ER. These models were produced at the beginning of the development of Interskol production.

Among household users, the most common models are the Interskol P26 / 800ER, P30 / 900ER, P710 / ER rotary hammers.

Dismantling of punchers Interskol of the P18, P22, P26, P28, P30, P600, P710 models

The principle of operation for all rotary hammers is the same.

The rotational moment from the rotor is transmitted to the shaft of the barrel and the working tool fixed on it. At the same time, with the help of a swinging bearing, popularly called a “drunk bearing”, the torque is converted into reciprocating motion, which transmits the shock pulse to the working tool.

All Interskol drills are assembled according to one general scheme and consist of the same blocks.

Conventionally, Interskol punchers consist of three blocks:

  1. Impact unit gear unit.
  2. Stator block.
  3. Block of power and control circuits.
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Repair of Interskol drills should begin with a study of the tool circuit, preparation of tools and the workplace.

The indicated blocks in the listed models have their own design features.

For convenience, we will divide the presented punchers into groups.

  1. In the first group we will include the Interskol P-18, P-22, P-24, P-26, P-30 perforators.
  2. In the second group, we consider the disassembly of the Interskol P-600 and P710 perforators.

Design features of the keyless chuck type SDS-plus

Let’s start with the differences in the design of the fastener assembly.

The principle of disassembling quick-clamping chucks is almost the same for all punchers.

Interskol drills use an SDS-plus keyless chuck. To work with the Interskol punch, it is necessary to use a tool with an SDS-plus shank.

Dismantling the keyless chuck

We will consider the dismantling of the keyless chuck using the example of the Interskol P-26 / 800ER punch.

After installing the puncher on the rear of the handle, remove the protective sleeve pos. 1, remove the washer pos. 2 and remove the locking ring pos. 3.

Then the washer pos.4 and the snap ring pos.5 are removed. At the next stage, the push sleeve pos.6 is removed.

To release the locking ball, pos. 8, press the special washer, pos. 9. Take out the ball, remove the conical spring, pos. 10.

The design of the keyless chuck of the Interskol P-30 / 900ER punch contains fewer parts. But the disassembly procedure remains the same.

Keyless chucks for Interskol P-600ER and P-710ER punchers are almost identical and are disassembled in identical sequence.

Keyless chuck of the Intersol P-30 / 900ER puncher

Details of the keyless chuck of the Interskol P600ER and P710ER punchers are dismantled in the following sequence:

  • a special ring is removed pos. 1;
  • releasing sleeve releasing pos.2;
  • the special pos.3 ring is pressed and the ball pos.4 gets;
  • the spiral spring is removed pos.5.

For all Interskol punchers, to remove the gear case, you must first remove the mode switch.

Dismantling the mode knob in the Interskol P-26 puncher

Having tipped the puncher to one side, turn the mode knob pos. 28 counterclockwise until the stop while the button pos. 26 is pressed. Remove the handle from the punch body.

Video: How to Disassemble a Puncher 24 70


Never switch the mode knob while the rotary hammer is operating.

Dismantling the block of the shock mechanism of the Interskol P26 / 800ER puncher

The main number of differences is contained in the design of the percussion mechanism.

The shock mechanism consists of several nodes:

  • barrel of the percussion mechanism;
  • countershaft;
  • strikers and percussionists;
  • cylinder liner;
  • friction bearing.

The shock mechanism in Interskol punchers works on the same principle. Differences in design features.

Dismantling the shock mechanism of the Interskol P-26 / 800ER puncher

In the Interskol P-26 / 800ER puncher, the percussion mechanism consists of the following units:

  • tool receiver;
  • node press fitting trunk;
  • trunk;
  • countershaft;
  • strikers, percussionists, industrial mass.
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Dismantling the instrument receiver

The tool receiver pos. 12 is disassembled after removing the keyless chuck parts from it.

At the first stage, four rollers pos. 11 are carefully removed. Further, the receiver is removed from the housing pos. 18, in which the needle bearing pos. 20 is inserted.

The barrel pos. 36 is mounted in the needle bearing.

Remove the tool receiver from the barrel.

From the instrument receiver, remove the industrial mass of pos. 16, the sleeve of pos. 15, the sleeve of pos. 14 and the rubber o-ring pos. 13.

Dismantling the barrel of the percussion mechanism

The barrel pos. 36 is removed from the inner housing pos. 18 after the gear housing is separated from the stator housing. To do this, unscrew the four screws pos. 30 from the gear housing.

Then unscrew the three screws pos. 85 on the handle pos. 86. After removing the handle, rotate the brush holder body pos. 81. until it can be pulled out of the case.

Now the gearbox housing and the stator housing are easily separated using a screwdriver, which pokes one of them at the junction.

The barrel can be easily removed from the industrial site, item 53 (inner case).

The outer diameter of the barrel is equipped with: spur gear pos. 35, spring pos. 33, washer pos. 32 and snap ring pos. 31.

In the cavity of the barrel is the body of the catcher pos.40, striker 45.

Dismantling of catchers, strikers

Dismantling the catcher pos.40 consists in separating the shock absorber pos.41 from it, the striker catcher pos.42, the catcher cap pos.43 and the retaining ring pos.44.

The piston of pos. 45 is inserted into the piston of pos. 45, which must be removed.

With the striker pos.45, the sealing ring pos.46 is removed.

From the ears of the piston pos. 47 it is necessary to separate the finger pos. 48 and remove the two rings pos. 49.

Dismantling the countershaft

To disassemble the countershaft, pos. 57, pull it out of the inner casing.
From the shaft pos. 58, remove the switch leash pos. 55, the spring pos. 56.

On the other hand: remove the support sleeve pos. 65, the spring support pos. 64, the spring pos. 63, the combined gear wheel pos. 62.

Intermediate shaft of a puncher Interskol P-26 / 800ER Spare parts catalog for the intermediate shaft of the Interskol P-26 / 800ER punch

Dismantling the shock mechanism of the Interskol P710ER puncher

The design of the percussion mechanism and the disassembly procedure for the Interskol 710ER rotary hammer differs somewhat from those of other models.

The main differences in the design of the intermediate shaft, the barrel of the percussion mechanism and the mode switch.

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Scheme of the shock mechanism and the intermediate shaft of the Interskol P710ER punch

The Interskol 710ER rotary hammer is a rotary hammer machine. Consists of an electric drive and an actuator. As an electric drive, a commutator motor is used. The actuator is a combination of the compression mechanism of the compression-vacuum type and the rotational mechanism. The reciprocating movement is transmitted due to the rolling bearing.

The diagram shows the dismantling order of the barrel pos. 15 (indicated by the red arrow), the composition of the firing pin and the strikers (indicated by the blue arrow). The green arrow indicates the details of the mode switch.

The intermediate shaft consists of the shaft pos. 47 and the parts mounted on it. It is easily disassembled, according to the attached scheme, does not require special knowledge.

Dismantling the electrical part of the Interskol rock drill

The electrical part of the Interskol rock drill consists of three main parts:

  • rotor;
  • stator;
  • carbon brush control circuits.

The disassembly procedure for the electrical part of all Interskol rock drill models is almost the same.

The electric circuit of the puncher Interskol P-26 / 800ER

At the previous stages, we divided the housing into two: the gear housing and the stator housing.

Stator disassembly

To disassemble the stator pos.74, it is necessary to remove the protective diaphragm pos.72 from the housing pos.77, which covers the stator from dirt, dust.

Loosen the two screws pos. 73 and remove the stator pos. 74. To facilitate the pulling process, it is enough to knock on the end face of the stator cover with a wooden hammer or bar.

The terminal blocks pos. 75 can be removed from the stator. This is done in order to check the quality of the contacts from the stator to the brush holder.

Rotor disassembly

The rotor is disassembled when it is necessary to replace the collector, bearings, rewind the windings.

You can separate the rotor from the shock mechanism assembly by loosening the two screws pos. 68 and removing the shield pos. 67.

From the rotor pos. 69, it is necessary to remove the bearings pos. 66, 70, the damping bush pos. 71. Bearings are easily removable with a puller.

Dismantling control circuits and dismantling carbon brushes

The basis for controlling the Interskol rock drill is the switch pos. 87 and the reverse lock pos. 90. Using the combination button, the rotary hammer can be used to set the engine speed.

To get the brushes pos.83, remove the brush holder pos.81. It is removed by turning counterclockwise by 90º. Having freed the brush holder, the carbon brushes are easy to get.

The scheme of the Interskol P710ER and P600ER punchers has its own characteristics:

  • no combined brush holder;
  • another type of switch used.

All! Interskol punch disassembled. Read the repair instructions and how to assemble and lubricate the punch.