Contents
- 1 Characteristics of brush wear
- 2 Procedure for making carbon from other brushes
- 2.1 The process of manufacturing carbon brushes to the Makita gun
- 3 Self-made electric sweepers
As is known, the main source in the perforator is the brush. It is important to monitor their condition and cleanliness of the reservoir. In the Makita 2450 and 2470 rotary hammers, carbon brushes CB-419 art.191962-4 are used. It is recommended to replace the factory carbon brushes after 80 operating hours. Both brushes must be replaced, regardless of the degree of wear.
Attributes of wear of brushes
It is not necessary to confuse the usual small sparking that is present when working with partial sparks of sparks in a circle, this is permissible under loads and with a new tool until the brushes are rubbed.
The first manifestations of wear of brushes, this is a strong sparking and extraneous sound. Stop work immediately!
Timely replacement of carbon brushes prevents the failure of more expensive parts of the perforator. The cost of a set of carbon brushes is not comparable with the cost of the rotor or stator of any power tool. You should not save on small things so as not to lose more. The conclusion is simple: change the carbon electrobrush more often. Do not forget, if one brush is faulty, the other one should change automatically.
The critical length of the Makita perforator carbon brushes can not be less than 8 mm
When replacing, it is worthwhile to look at the anchor, what kind of collector output. If there is a noticeable deepening, the collector should be ground to an even level, if this is not done, even the original new brushes will spark, which will lead to even more burning out of the collector.
After installing new brushes, be sure to wear at idle without load for at least 10 minutes.
Set of new carbon brushes Makita 2450 and 2470
How to make carbon from other brushes
Coal brushes can be purchased at almost any power tool store. But there are times when there is no shop nearby, but you have to work. There is a way out: you need to make brushes yourself from brushes from other power tools. An important point is the selection of an electric brush, similar in its characteristics. Incorrectly selected coal rod will lead to strong sparks or to the formation of an anchor.
The option of self-made carbon brushes to the hammer Makita 2470
The process of manufacturing carbon brushes to the puncher Makita
The work begins with the preparatory stage. It is necessary to choose the correct cross section for the preparation of the coal rod. Here are the dimensions of the factory carbon brushes CB-419A in mm( 6x9x12).Selectable carbon rods should be in section of larger or the same size as those used in Makita perforators.
If you have selected blanks with a larger cross-section, they are filed with nail files or with sandpaper. But you can use a fairly simple device. A special device called "fungus" is clamped into the electric drill. Practically every master has this adaptation. It is used in the process of polishing surfaces. The device is a circle with Velcro on which a grinding disk of the desired diameter is fastened.
Try to secure the drill to the work bench or table securely. The drill can be fixed with clamps, clamps, or temporary adaptation. Insert the fungus into the holder of the drill, fix a circle of sandpaper No. 100 on it.
Drill with a nozzle
After turning on the drill, adjust the speed of the cartridge. It is preferable to begin grinding at low speed. This will allow you to properly control the grinding process.
Grinding of the coal rod from the battery
Constantly check the dimensions of the carbon brushes. Especially important are the dimensions of the cross section of electric brushes. Brushes should fit tightly into the brush holder, but move freely.
Homemade brushes for the perforator
Homemade electric brushes
Find the right material, cut it to size with a margin of 2 mm. Next we bring the emery to the desired size. As an upper contact on the wire, it is recommended to use the contacts of the old brushes, soldering them to the contact wire if there is one.
If there is no contact group, a hole of smaller diameter is drilled in the electric brush than the diameter of the copper braid to fix the wire. The braid is twisted, inserted into the drilled hole and wedged from the opposite side by a copper wire. Everything is ready, set up and checked for sparking.
