DIY

Electric grinder – do-it-yourself grinder attachment

Hello, dear readers and DIY!
One of the classic and extremely important carpentry tools is the chisel. Many people want to mechanize this tool, and speed up the workflow.
In this article, the author of the YouTube channel “KUI Iron” will tell you how you can make a nozzle for a grinder that turns it into an electric chisel.
 Electric tool & mdash; attachment for a grinder with your own hands Electric tool & mdash; hands This project is not very difficult to manufacture, and it will require a small amount of welding work.
Materials needed for DIY.
– Sheet steel 5 mm thick
– Extended nuts m12, bolts
– Steel 12 mm rod, pipe
– Engine speed regulator 220v 2000 W – – Compression springs, steel 65Mn – Bearings
– Eccentric bearings – – Needle bearings – – Chisels
– Abrasive “coral” scraper disc
– Protective gloves, spray paint.
Tools used by the author.
– Grinder with speed regulator
– Screwdriver, drilling machine
– Metal crowns
– Tap holder, tap, semi-automatic core < br> – Drills for metal
– Welding machine
– Welder's magnetic corners, welding mask – – Geifer gripper, F-clamps – Machine vice, pliers, oiler
– Square, tape measure, marker.
Manufacturing process.
So, from small things you will need three extended nuts m12, bolts, and an old bearing (or rather, a clip from it).
Electric grinder & mdash; do-it-yourself grinder attachment Electromeska & mdash; hands The material for the base of the nozzle will be a plate with dimensions of 160 × 52 mm. Its master cuts out of steel sheet 5 mm thick.
Electric tool & mdash; hands  Electric grinder & mdash; do-it-yourself grinder attachment Electromeska & mdash; hands  Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands Installing the metal crown on the drilling machine, the master drills a hole in the plate of the same diameter as the seat for the protective cover on the grinder. When drilling, be sure to add machine oil so as not to burn the incisors of the crown.
< img class = "aligncenter" alt = "Electric grinder & mdash; do-it-yourself grinder attachment" src = "https://usamodelkina.ru/uploads/posts/2021-06/1623703564_spr-028.jpg"/> < a href = "https://usamodelkina.ru/uploads/posts/2021-06/1623703659_spr-033.jpg" rel = "prettyPhoto">Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands A steel bar with a diameter of 12 mm will serve as a rod, and a pair of elongated m12 nuts will play a role guide. These details need to be prepared.
Power tool & mdash; hands The first master processes the nuts. Be sure to fix them in a machine vice, the thread is cut off in the nuts by drilling.
Electric tool & mdash; attachment for the grinder with your own hands Electric tool & mdash; hands Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands Having clamped the bar in the chuck of the screwdriver, the master processes its surface on a belt grinder.
The production of a similar machine was described in detail in a recent article .
 Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands  Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands As a result, both nuts should be freely (but without backlash) put on the stem.
Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands Electric tool & mdash; do-it-yourself grinder attachment These elements will be positioned on the wireframe along the centerline. The excess parts of the plate can be removed later.
 Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands After drilling and cutting, the master processes the edges and rounds the corners with a grinder. < br> Electric grinder & mdash; do-it-yourself grinder attachment The surfaces of the plate are cleaned with a grinder from a “coral” abrasive disc.
< img class = "aligncenter" alt = "Electric grinder & mdash; attachment for the grinder with your own hands" src = "https://usamodelkina.ru/uploads/posts/2021-06/1623703608_spr-077.jpg"/> Electric tool & mdash; hands  Electric grinder & mdash; do-it-yourself grinder attachment Now you need to make a clamp that will attach the nozzle to the grinder. Considering the diameter of the seat for the protective casing, the master selects a pipe of a slightly larger diameter and cuts off a ring from it.
 Electric grinder & mdash; do-it-yourself grinder attachment Electric tools & mdash; hands  Electric grinder & mdash; do-it-yourself grinder attachment The ring is cut lengthwise (a C-shaped part is obtained), and the surfaces of the workpiece are ground.
 Electric tool & mdash; attachment for the grinder with your own hands Electric grinder & mdash; attachment for the grinder with your own hands For the second part of the clamp, an elongated nut is suitable, in one of the faces of which you need to make a semicircular recess with the same curvature as the ring.
Electric grinder & mdash; attachment for the grinder with your own hands Electric tool & mdash; hands Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands Half of the thread is drilled into the elongated nut and welded to the clamp on both sides. After welding, the nut is cut into two halves.
 Electric grinder & mdash; do-it-yourself grinder attachment Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands Electric grinder & mdash; do-it-yourself grinder attachment Now you need to insert the stem and weld both guides to the base.
Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands  Electric grinder & mdash; do-it-yourself grinder attachment So, the main parts of the frame are almost ready.
Power tool & mdash; hands Electric grinder & mdash; attachment for the grinder with your own hands The sides of the plate can be cut to make the structure lighter and smaller.
 Electric tool & mdash; attachment for the grinder with your own hands A clamp is welded on the underside of the base.
Power tool & mdash; hands  Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands Electric grinder & mdash; do-it-yourself grinder attachment The eccentric will be made in two parts. To prevent its working part from wearing out, the master decided to use an outer bearing race. Balls and other details are not required.
Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands Electric tool & mdash; do-it-yourself grinder attachment Now a hole is drilled in the steel plate of the same thickness as the height of the cage, and an M14 thread is cut in it (as on the grinder's spindle).
 Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands Gradually removing unnecessary elements, the master needs to get a nut with an offset from the center of the circle about 2- 3 mm.
Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands The outer diameter of the nut is adjusted so that it fits inside the cage. These parts are tacked together by welding along the perimeter.
 Electric grinder & mdash; do-it-yourself grinder attachment Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands A hole must be drilled in the tail of the stem and an M6 thread cut into it. Here the master resorts to a simple technique – he clamps the drill in a vice, and the bar itself rotates with a screwdriver.
Electric tool & mdash; attachment for the grinder with your own hands Electric grinder & mdash; do-it-yourself grinder attachment A short bolt is screwed into the resulting hole, designed to prevent the swingarm from flying out along with the chisel from the guides. Simply put, its head will be a stopper.
It will also be possible to make several replaceable nozzles, and change them without disassembling the structure.
Electric tool & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands A short plate is welded approximately in the middle of the stem – it will serve as a stop for the spring, and prevent the stem from rotating in the guides.
A chisel shank must be welded to the second end of the stem.
After that, you can clean, degrease, and paint all the parts.
Electric tool & mdash; hands Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands So, everything is ready, you can assemble the nozzle. The clamping bolt is installed first into the clamp.
Electric grinder & mdash; do-it-yourself grinder attachment Electric grinder & mdash; attachment for the grinder with your own hands A compression spring is put on the stem, it must be selected during testing.
The swingarm is inserted into the guides, and a locking bolt is screwed in.
 Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands Electric tool & mdash; do-it-yourself grinder attachment It remains to put on and fix the nozzle on the grinder.
 Electric grinder & mdash; do-it-yourself grinder attachment Electric grinder & mdash; do-it-yourself grinder attachment The last on the spindle is the eccentric nut.
Electric grinder & mdash; do-it-yourself grinder attachment Power tool & mdash; hands  Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands It is important to note that the master uses a grinder with a speed controller . You can also use a conventional grinder by connecting it through an external engine speed controller .
Too high revs are useless here – the pendulum will simply not have time to return to its original position.
Electric tool & mdash; do-it-yourself grinder attachment Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands Electric grinder & mdash; do-it-yourself grinder attachment Electric tool & mdash; hands Electric tool & mdash; hands To reduce the load on the engine and gearbox of the grinder, several improvements can be made to the design.
First of all, it is worth modifying the eccentric nut, for example, by grinding off the upper surface at a slight angle, or by removing some metal on its wide side. Thus, you can balance the nut, and minimize axial vibrations.
The pendulum (rod) can be made not from a steel bar, but an aluminum thick-walled tube, reducing its weight.
Lugs should be made in the stem shank, and fixed in them < u> needle bearing , which will abut against the eccentric nut. This minimizes friction between parts, and, as a result, unwanted wear and heat.
Alternatively, leave the stem shank unchanged, and replace the eccentric eccentric bearing , but this is already quite expensive.
< img class = "aligncenter" alt = "Electric grinder & mdash; attachment for the grinder with your own hands" src = "https://usamodelkina.ru/uploads/posts/2021-06/1623703676_spr-250.jpg"/> Thank you author for a simple but useful tool for the workshop!
Electric grinder & mdash; do-it-yourself grinder attachment Have a good mood, good health, and interesting ideas!
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The author's video can be watched here.

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