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DIY chain miter saw from a Bulgarian

To all the inhabitants of our sites good day!
Perhaps sometimes the carpentry masters do not have enough miter saw blade depth.
In this article, the author of the channel "Sek Austria" tried to offer a solution to this issue by installing a special set with a chainsaw on the grinder. He also made the basis for it with the possibility of turning the cutting surface at 45 degrees.

Materials and details.
1. The nozzle on the grinder in the form of a chainsaw
2. The grinder (material).
3. Steel strip.
4. Bolts, nuts, small things.

Instruments.
1. The welding machine.
2. Drill or drilling machine.
3. The Bulgarian.
4. Vise.

So, for starters, the author will assemble a set of nozzles for the grinder in the standard version. It is quite simple. Everything is included. Tire, chain, protection, spray can for oil. Even the stars come in two versions M10 and M14. And, of course, the base.










Having assembled the kit, it became clear that when turning 90 degrees, the direction of movement of the chain is not suitable for such an application.

The author decided to remake the grinder and deploy the gearbox in the other direction. To do this, I had to completely disassemble it.


I also had to cut off the extra parts. The grinder from the grinder.


Removes the main part of it.


It turns out that the case will also have to be processed a little with an electric file.



Assembles a gearbox.


Sets the base from the nozzle and decides to get rid of unnecessary for this homemade details.


Now the author needs to make mounting the base of the nozzle to the future base.
Trying on a steel strip.

According to the marking, it slightly cuts with a hacksaw to make the strip easier to bend.

Clamps in a vice and with the help of a hammer sets it to the desired shape.







Perfectly fits the nozzle, it remains to remove unnecessary parts from it.

Cutting off all unnecessary grinder.



Now you can mark the mounting points and drill holes in the base.


For fastening bolts makes two small rectangular dies. Marks, drills, cuts threads.




Fixes the mount to the base.



It's time to put the tire in its place.



In the mount marks the places for connection with the base.


The base is made of steel strips, welding them together.






With the help of these ears, I saw and will be able to deviate 45 degrees in the plane of the cut.



Welds the ears to the base.


But, having connected the base with the base, it became clear that the tire does not have enough space for an incline of 45.


Cutting off part of the base, everything worked out.


To fix the angle firmly, the author needs to make a lock. Cut an arc slot and get such a workpiece.



Trying it on to the base and welding. Everything is rigidly fixed.





For convenience of operation adjusts the handle.

It also moves the pen and oiler to the other side.


All is ready!

It's time to start the test.
It starts with a 1.5 inch board, the cut is quite smooth.



Next is 3 inches of mahogany. Everything is fine too, even at an angle.




But the tool was not intended for such a trifle. 8X8 inches!



In general, the power of this saw is enough to even even cut such a log.
Thanks to the author for the interesting tool!
Good ideas to all!
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11 comments
Author
Nope. the circumference is good.
BUT! even with excesses - one revolution = N sprocket teeth, respectively, the same number of teeth will travel along the chain.
Knowing the speed of the chain in standard saws, the chain length and the number of teeth - we calculate the sprocket speed.
not needed at all, the main thing is traction
Rights Dmitrij - Circle x Kol.ob / min = speed of passage of a chain.
The speed is high ... and not linear, but with excesses on the stars!
Here we recently discussed the danger of a grinder with a regular drive.
And here in the photo the guy is standing without pants, without mittens, without ... with resourceful crap.
And not all cutting modes go on wood. Super speed is not needed here Imho.
Author
Maximum chain rotation speed (m / s)
12.1 m / s
Maximum chain rotation speed (r / min)
3750 rpm
Number of Chain Links
57
here from the ratio of teeth in the chain / teeth in the star - there will be a coefficient by which to multiply 3750 - chain revolutions per minute. get the speed of the star
it’s not, the chain pitch on the saws can be different ... It’s all more difficult to calculate.
Author
it is necessary not the circumference, but the number of teeth, and so - yes, the Bulgarians give out 9-11K revolutions
and by the number of teeth - chain length
I looked at my makite, the chain speed of 13.3 m / s.

Now let's estimate the grinder. The circumference of the drive sprocket is 9.5 cm (approximately). A grinder gives out 11,000 revolutions per minute, each revolution is 9.5 cm. We get 104,500 cm per minute, this is 1045 m / min. Divide by 60 seconds = 17.4 m / s

13.3 - Makita 1.8 kW
17.4 - on a grinder with 11,000 rpm.

In principle, not such a big difference.

As a conclusion - from a power saw you can make a grinder or a circular. And the torque on the electric saw seems to me a lot more ...
Author
Solidol =))))
and how to smear it? Does it work on nano-oil?))

Years have nothing to do with it, the question is in the resource when using. I usually fall apart in a season or two. You have to either do a bulkhead or throw it away. But this is not a hitch to saw off, but the preparation of firewood for the winter, taking into account the sawing.
Well, yes, yes, he lives twice as much as three times as a minimum.
Author
I have (I don’t remember the year, but already 20-25 years old for sure) Parma-M

So, she’s still running =) She doesn’t even have an oiler
P.S. I slightly added your Bulgarian subject =)
I read about speed, I think everything will be normal. Previously, the reducer in the Bulgarian will lie down than the tire will overheat.
I think that from tire revolutions the tire will quickly overheat and die, no matter how it is lubricated.

I noticed that when the tire overheats, the metal already becomes soft. Overheated - threw it out. Although maybe it's in low-quality tires?

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