Introduction: Trenching Machine From a Burnt Angle Grinder

Picture of Trenching Machine From a Burnt Angle Grinder

We have a house in the hills of Cordoba and sometimes we don't get there in three or four weeks. In this lapse of time the grass grows significantly,invading sidewalks and pavers

Using the gears box of a burnt angle grinder,a car window motor,a stick from a polisher I made a trencher to clean the borders of sidewalks and pavers from grass

Step 1: Dismantle the Angle Grinder

Picture of Dismantle the Angle Grinder

Disarm the grinder to expose the rotor split the winded body and get the axis ready to conect to a motor

Step 2: Put the Handle

Picture of Put the Handle

I use and stick from a old polisher machine as the handle

Drill a hole on the lower extreme and fix the stick to the gear body of the angle grinder with the corresponding bolt

Step 3: Placing a Weel

Picture of Placing a Weel

With a piece of iron made a ball bearing support to handle it and better operate it

Step 4: Powering the Trencher

Picture of Powering the Trencher

A 12 volt car electric window motor powers the device by means of a plastic tube

The motor is fixed to the handle with a self threading bolt,to the plastic side of the motor, and a plastic clamp

Step 5: Energising

Picture of Energising

The energy comes from a house alarm battery

To hold it I made a support from iron angle and a part of a bike inner tube

Step 6: Connecting

Picture of Connecting

Find the propper switch mark the handle and drill a rectangular hole to insert the switch in the handle

Conect the battery to the motor by inserting the switch in between as in the picture

Step 7: The Trencher Blade

Picture of The Trencher Blade

The trench will be made for a wood blade cutted in a way to form an spiral as seen on the picture

To give it more firmness,I weld a small iron in order to get both ends of the cutted blade,separeted

Step 8: Testing on the Field

Picture of Testing on the Field

The trencher works fairly good cleaning ,of invading grass ,the border of the sidewalk

As an unespected result,I found that it could be used for instaling hoses for artificial irrigation,underground cables,and so on. We'll just need a bigger blade and a bigger motor I guess,but that will be theme for another instructable

Hope you like and could be usefull for you, if so please vote me for the backyard and metal contests. Thanks .BR


tutdude98 (author)2016-09-05

Put relay, i made diy rotary tool, and when i tried to cut something it just melted my switch

Ugofirst (author)tutdude982016-09-05

Hi tutdude,thanks for the advice ,I used the trencher for about haf an hour and the switch not even warm up,but that is a point to considerate,cheers

tutdude98 (author)Ugofirst2016-09-06

Well depends on how much you motor is drawing, i took mine from old drill, and when its working hard it draws around 10A, and switch could handle only 5A

Ugofirst (author)tutdude982016-09-06

Thats right,this motor is drawing no more than 4amps,anyway I'm searching for a bigger motor that could drive a bigger blade ,thanks

BeachsideHank (author)2016-09-05

Excellent tool reuse!

Ugofirst (author)BeachsideHank2016-09-05

Thanks,I really appreciate your opinion

About This Instructable




Bio: Broken devices always have several useful parts,recovering them , we reduce trash ,then we are taking care of the planet
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