How to Remove Gear from a Drill Gear
In households, the most popular tool is an electric drill. Recently, electric drills, called perforators, have been especially popular.This tool allows you to not only drill a hole, but also use nuts to tighten nuts, self-tapping screws, screws. An electric drill is a reliable tool and rarely, but fails. How to troubleshoot electric drills. The main malfunctions in electric drills are divided into mechanical and electrical.
Frequent mechanical failures include failure of the chuck.And how to remove the cartridge from the screwdriver and replace it?Immediately, we note that replacing the cartridge with an electric drill, screwdriver, hammer drill are exactly the same.The reason for the release of the chuck is most often the wear of the clamping jaws. This is the most serious electric drill malfunction. A complete replacement of the chuck is indispensable. And how to remove the cartridge from the drill will show the.
By the way! The given method of replacing the cartridge is suitable for any modern models of not only electric drills, but also rotary hammers, screwdrivers, since all the above designs provide for just such a method of attaching the cartridge.
But with Soviet-made drills, the cartridge is held on a Morse cone and screwed. And how to remove the cartridge from the cone? To do this, you can use a bearing puller or knock down with a hammer.
Attention! Having bought a new power tool with a cartridge, be sure to remove the cartridge and carefully lubricate all contacting parts and threads.
1. The procedure for replacing the cam cartridge electric drillTo disassemble the electric drill, check if its cable is disconnected from the mains.Using a special key, spread the cams of the cartridge to the maximum possible position.If you look inside the open cartridge, then most often you can see a screw designed to mount the cam cartridge to the motor shaft.Typically, a screw is removed using a Phillips screwdriver.Remember! The thread of the fixing screw is left, and it is unscrewed by turning the screwdriver clockwise.Unscrew the screw, insert the L-shaped Allen key into the chuck in place of the drill and tighten it.
If the screw has been worn off the head and you cannot unscrew it with a screwdriver, do so.Take the second drill, insert a drill into it with the diameter of the screw head and proceed with drilling the screw. It all ends with the screw being unscrewed during drilling.
Insert an open-end wrench on the motor shaft at the base of the chuck. There are models in which the gap between the chuck and the housing is very small. We’ll have to pick up or file a saw by thickness. The key is required to fix the motor shaft.In models of earlier releases, there are no key cuts on the shaft. In this case, it is necessary to disassemble the drill body, remove one cover. Clamp simultaneously the driven gear of the cartridge shaft and the cooling fan and try to unscrew the cartridge with a sharp anti-clockwise movement.
But back to the key option.Now, having put the drill on a wooden plane and fixing the shaft with a key, hit the protruding tail of the hex wrench counterclockwise with a wooden or rubber mallet.The cartridge is mounted on the shaft by thread.Rotate the cartridge counterclockwise to remove it from the electric drill.If there is no L-shaped hex key, you can use a drill with a suitable diameter, which is pressed into one of the three holes for the clamp key.
Inspect the cartridge. If the cams are completely out of order, replace the chuck with a new drill. Install the new chuck on the drill, performing all operations in reverse order.Remember! When installing a new chuck, be sure to lubricate all rubbing parts. This is especially true for threaded connections.
This we examined the case when it is necessary to replace the cam cartridge. But power tools are also being produced with quick-clamping chucks.
Keyless chucks allow you to replace the drill in seconds without using any additional tools or devices.Keyless chucks are divided into single-coupled and double-coupled.The design of the one-foot cartridge has a special mechanism that blocks the shaft when replacing the tool. The replacement operation can be performed with one hand.In a double-coupling chuck, tool change is performed with two hands. The first clutch is held with one hand, the other clutch is twisted with the other hand.But keyless constructions do not securely fasten the tool, especially in shock mode. And the use of plastic for their manufacture often leads to breakdown of cartridges.The cam cartridge is more reliable, and the parts used in it are made only of metal. A special clamping wrench must be used to secure the tool.
Ways to remove the keyless chuck from a drill or screwdriver
The chuck is screwed to the axis and locked with a clamping screw.The keyless chuck is removed according to the same algorithm as the cam chuck.First, the locking screw is unscrewed clockwise. If there is a turnkey flats on the shaft near the key, then insert the key into the slots, holding any lever in the cartridge, try to unscrew the cartridge by rotating it counterclockwise.The installation of a new cartridge occurs in the reverse order.
But you can repair the cartridgeIn order to inspect the details of the chuck, it must be disassembled.A proven and reliable method of disassembling the electric drill chuck is proposed.
Take a conventional hammer drill, remove the boot from it and insert the adapter. The adapter can be made from a failed hammer drill. The adapter is a drill shank with a cut-off drilling part.Put a cartridge on the adapter shaft and press it with a rubber shock absorber or a wooden board.Before installing the cartridge on the adapter, it is necessary to insert the cams into the cartridge until they are fully immersed.
After assembling the structure, turn on the hammer in impact mode. After 3. 5 seconds, the cartridge should be sorted out.Immediately you need to mark the cams and places from the location in different colors.Now you can proceed to the inspection and troubleshooting of the cartridge.If necessary, the cams can be replaced with new ones. True, one cannot do without additional boring of cams on a lathe.Other parts can be easily replaced if available.
But there are other mechanical problems.There are times when a failure of an electric drill is caused by a gear failure or poor bearing performance.
2. The procedure for working with the electric drill gearTo get to the gearbox, you need to disassemble the plastic body of the electric drill.After removing the housing cover, release the cartridge shaft and remove it. A driven gear of a larger diameter is mounted on the shaft.A small spiral gear is attached to the motor shaft.In the gear case there is a bronze bushing, most often leading to failure of the drill. Everything happens due to its significant wear and tear.Check the dimensions of the sleeve and order a turner. Use bronze as the material, but caprolon is acceptable.When replacing the sleeve in the gearbox, the bearings, their seating density and their lubrication are checked.With a large wear of the gear teeth, they will have to be replaced. The teeth of the gears wear out when the support sleeve fails.Most often, the driven gear of a larger diameter wears out. Its replacement is simple, you just need to remove the snap ring and key.The old gear must be removed from the axis of the cartridge. You can use a puller, or you can just knock it down gently with a hammer, substituting wooden supports.
Electrical faultsNow let’s try to consider the characteristic malfunctions of the electric part of the drill.Most often, the operation of the electric drill is interrupted due to wear on the brushes.
1.Replacement of brushes in an electric drillTo replace the brushes, it is necessary to remove the side cover of the electric drill case by unscrewing the fixing screws. There should be at least 7 pieces.The case is removed by carefully prying a screwdriver at its edges.Having opened access to the electric motor, you will see two boxes in which brushes are installed.In order to get the brushes, you need to free the boxes, bend the holders and get the worn brush. Do the same with the second brush.On the vacant places, install new brushes, wipe around the contact space with a clean cloth dipped in white spirit.
2.Repair of power cord of electric drillOne of the unpleasant malfunctions is the periodic stop of the electric drill during operation. Most often this happens due to an arbitrary loss of power supply. And the thing is that at the entrance to the drill body, the power cable experiences various loads, which lead to wire breakage.
To fix the problem, one of the side covers of the housing must be removed. Use a tester to check cable integrity.If damage is detected at the entry point of the cable into the case, but a broken piece is cut off from the cable, a piece of a 20 cm rigid PVC pipe is put on the cable and the cable is installed in place with subsequent connection.
To replace the button with the speed controller, it is enough to remove the housing cover, disconnect the wires from the controller. The new controller is installed in the same place and connected according to the diagram. If there is no circuit, then before removing the old regulator, it is necessary to sketch the connection diagram.
3.Inspiration appeared inside the caseThe appearance of sparking inside the case is most often caused by the interturn closure of the armature windings.The second cause of sparking is the contaminated surface of the collector lamellas.Inter-turn closure can only be determined with a special device.But dirt from the collector part can be removed by yourself using fine sandpaper. After stripping, carefully remove dust from the grooves between the contact plates called lamellas. This is best done with an old hacksaw blade. At the end of the work, the anchor must be checked with the PPY device.
Here, perhaps, the main malfunctions of electric drills of any brand.