How to unscrew the disk on the circular saw
How to hand sharpen a disk with a file
Hand files are seldom used to sharpen pobedite tips. It is inefficient, and it is very difficult to maintain the angle of the cutting edge during manual cutting.
But for sharpening steel saws it is quite suitable. Sharpening is carried out after the teeth have been set and adjusted, just like with the machine. The disc is then clamped in a vice between two wooden blocks so that the workpiece is horizontal.
Important! It is advisable to trace the outline of the template on the saw with a marker before starting work, so as to see the amount of metal that needs to be removed.
HS7010 Makita Circular Saw Disassembly
Circular saw design and operating principle
Handheld circular saw differs from coping saw in the absence of a bed with a rotary table, as well as the placement of the handle. But in general, both models are similar in internal structure, working principle and do not differ in complexity of design. The following illustration shows the manual circular saw.
The main components of the machine are as follows.
- Upper guard with opening for emptying sawdust.
- A housing that houses the electric motor and the start button. Some electric circular saw models can be battery powered. Battery pack is also housed in the housing.
- Lower (sliding) protective guard, which automatically closes the cutting element after it leaves the workpiece.
- Circular saw blade. Mounted on the gearbox shaft with a nut or bolt.
- Parallel stop. Makes a clean cut without the need for accessories.
- Base plate (sole) of the machine. It holds the tool at different angles to the workpiece or guide bar.
- Depth regulator. It can be used to adjust the reach of the circular sawblade in relation to the base plate.
- Adjuster for inclination of the base plate. Allows the unit to be tilted for sawing at an angle.
The principle of operation of this tool is as follows. AC or battery power is supplied to the start button which interrupts the circuit. When the start button is pressed, power is available to the electric motor. The following is an electrical diagram of the unit.
An electric motor starts the machine and sends the rotary motion to the saw blade through a gearbox. The unit is mounted with the sole on the workpiece or guide bar, and then both longitudinal and crosscutting sawing is performed.
How to change a blade on a mitre saw
Trimmer saw. a tool that not everyone is familiar with. It can be used for a large number of materials, but is not often needed in the home. The saw is mainly used by professional trimmers. But if you plan to repair by your own forces, it makes sense to get hold of this tool to facilitate the process.
In addition to mastering the operation of the device, you also need to understand its consumable parts. The main of these elements is the cutting disc.
Setting up a circular saw. step by step instructions with photos
If the circular machine began to work worse, it is possible that the equipment has simply not been serviced for a long time. Spend some time on preventive cleaning and do some adjustments with your own hands. You will immediately see the difference in the performance of your “circular saw”.
Before starting maintenance, unplug the power plug from the socket and do not turn on the circular saw until the work is finished.
Types of work
The area of application of the circular saw depends on its size and type.
Manual circular saw
These electric saws are designed for making precise, straight cuts in thin wood materials. The manual circular machine is small in size and most often used for work at home.
Small-sized equipment for wood sawing is necessary for interior decoration of houses. Handheld circular saws are often used during repairs to cut laminate or wall finish material.
Stationary circular saws are equipment for daily use. These professional machines are capable of processing large quantities of wood in a day. They have a fairly large weight. more than 10 kilograms and high power up to 2500 watts.
Circular machines are mostly used in manufacturing plants for industrial purposes. The cost of such a device is quite high. Some small models of circular equipment also have a stationary use function. They are successfully used in home workshops.
Makes a difference in features such as cutting speed and
fineness of cut. Fewer teeth increase cutting speed and improved chip evacuation, but inferior cutting finish. If you increase the number of teeth, the cut comes out more unstained, but the load on the engine increases. Conventional number of discs can be divided into three groups:
Blades with an intermediate number of blades are regarded as universal. They can handle soft and hard wood, make cross and lengthwise cuts, to use for processing of different wood products.
How To Change Circular Saw Blades
Repair of engine components
At this point it is worth remembering how the circular saw has manifested itself when it breaks down, what signs it was accompanied by. Mechanical damage is almost always accompanied by extraneous noises such as whistling, cracking, grinding, etc. д. In this case, first try to turn the motor shaft: it should rotate smoothly and not too tightly, without seizing or vibration.
Circular saw motor protection.
If you notice any irregularities, disassemble the motor and carefully inspect the bearings in the housing and rotor: one of them is probably the culprit. Another possible defect. wear of the gear teeth. Broken parts should be replaced. It should be borne in mind that some operations, such as removing the bearing from the motor armature, should not be performed independently, but it is better to turn to a master with special equipment.
Rotor and stator faults are a common problem. Its main signs. strong sparking and smoke in the brush compartment, accompanied by a characteristic smell. If disassembly of the instrument reveals strongly visible traces of burning, it is necessary to replace all burned parts with new ones. In the same case, when the armature looks undamaged and there is a layer of soot on the stator, do not hurry to change the stator, since the problem may lie in the rotor (not even in the rotor itself, but in its windings, where the wire breakage may have occurred).
To check the armature for breakage is not difficult: for this purpose disconnect the contacts of the stator from the graphite brushes and fasten the probes of the tester in such a way that they contact the windings of the engine through the brushes. The tester should show a small resistance. Then begin to slowly turn the motor shaft, not stopping to watch the readings of the device. At some point, the resistance may increase sharply: this will mean that the armature is broken and must be replaced.
Design and principle of operation of the circular saw
The manual circular saw differs from the crosscut saw in the absence of a bed with a rotary table and in the placement of the handle. But in general, both models are similar in internal device, the principle of operation and do not differ in complexity of design. The following illustration shows the construction of a handheld circular saw.
The following basic components are included in the machine.
- Top guard with hole for emptying sawdust.
- Casing in which the electric motor and the start button are located. Some electric saw models can be battery powered. In that case there is also a battery pack on the housing.
- Lower (sliding) protective hood that automatically closes the cutting element after it leaves the workpiece.
- Circular saw blade. Is secured to the gearbox shaft with a nut or bolt.
- Parallel stop. Makes it possible to make a clean cut without any additional aids.
- Base plate (soleplate) of the unit. Allows tool to be positioned at different angles on the workpiece or guide bar.
- Depth regulator. It can be used to adjust the reach of the saw blade in relation to the base plate.
- Angle adjustment of saw blade. Allows the unit to be tilted for cutting at an angle.
The principle of operation of the tool is as follows. Power supplied by mains or battery goes to start button, which opens circuit. When you press the start key, the current begins to flow to the electric motor. The following is a schematic diagram of the unit.
How to Remove a Stuck Circular Saw Blade
The electric motor starts and transmits the rotary motion through a gearbox to the saw blade. The unit is mounted with the sole on the workpiece or guide rail, and then the process of both longitudinal and transverse sawing is performed.
A way to improve a manual circular saw with paronite
Hello friends, this video about a way to facilitate the work of the craftsman will be useful to those who like to improve tools and use manual circular saws like the one presented in the video. Very often the disk is heated by friction while sawing and starts to turn on the shaft, so the place, where the disk stands, starts to wear out a lot. Soon it is not possible to clamp the disc. The situation with spinning often happens and the author of the video tutorial out of it this way cut the gasket from paper under the nut and for a while it sufficed. For a short time, half an hour, then I tried a linoleum pad lasted a day or two, then the disk heated up and the gasket loosened.
The rubber pads worked the longest, he even had one left. It reminds the situation with brake discs, in a car, when friction pads are thick, they brake well, but worn out, when metal rubs against metal it is almost impossible to brake. The situation with the circular saw is similar, originally the car seat is made of steel, it is seen on the roller and the slightest shift of the disk leads to turning of the disk in the car seat. Over several years, this place was so worn that I had to put a washer measuring a millimeter and a half. It was like that until I got a plumbing gasket made of paronite. Since paronite withstands high temperature without softening and is similar to friction pads that do not let slip, it was decided to take paronite and cut the necessary part out of it. At the car store I found a vaporite car kit, with lots of empty spaces, from which I could cut a full-fledged wide gasket. As a result two pieces were cut and now the disk is not rotated under any circumstances. We put friction spacers, then a washer and then a special washer, which is made with a shaped notch and it does not turn on the shaft, if the disk is turned. By the way it is quite difficult to unscrew or tighten the bolt as there is often no stopper on circular saws. The author has adapted to put the disk with teeth in wood and so to unscrew and screw up. Hopefully the experience of the wizard will be helpful to someone. Thank you for your attention.