Helper for easy and perfect sharpening of knives, scissors and other blunt tools. I have been grinding with a similar grinder for about 15 years, if you have any questions, write to me. Diamond sharpeners will sharpen everything, and for maximum sharpness, diamond polishing paste applied to birch plywood can be used. The correct angle can be set using the "Spirit level" application or you can color the blade with an alcohol marker and by lightly running a fine grinding stone you can see whether to increase or decrease the grinding angle, see photos.
You will need: diamond whetstones 150 x 20 mm
coarse, grit 80-180 for repairing damaged knives,
medium-coarse for grinding, grit approx. 320,
fine for final sharpening and re-sharpening of slightly dulled knives, grit 2000-3000.
Diamond polishing pastes:
I recommend two to three roughnesses of W5, W2.5 and W0.5 are absolutely sufficient.
Neodymium magnets, six pieces 30x10x2mm.
Precise steel log diameter 6mm approx. 600mm long and 10mm approx. 300mm long.
Spring 1x8x20mm.
aluminum tube, inner diameter 6mm, outer diameter 8mm, can be replaced with a printed one ("tube" part)
3 mm thick birch plywood, if you use another piece of plywood, use the "gr hold for cut" part as a plywood carrier and cut it in the slicer so that it has the same thickness with the plywood as the "on 1.1 mm dia" part with a diamond grinding stone so that you they didn't have to change the grinding angle.
Fasteners:
two-component epoxy glue for gluing magnets, tubes to the grinder holder and balls to the rod
wire diameter 2mm, 8mm long, 2 pcs for the grinder holder, (perhaps filament could also be used)
screw M4x50mm with hexagonal head, min. 4 pcs
screw M4x30mm with half-round head, can be with integrated washer up to 10mm diameter, 12 pcs
M4 nuts approx. 22 pcs
screw M3x16mm with half-round head 4 pcs
nuts M3 4 pcs
screw M6x35 2 pcs
nut M6 2 pcs
To stick the magnets, use a piece of flat sheet metal (for example, an old saw blade) on which you stick plastic adhesive tape and thus obtain a plane.
For more convenient grinding, it is a good idea to hold the entire product with a clamp to the table or in a vice in the workshop. In order not to scratch the knives with loose abrasive when turning, it is a good idea to stick electrician's insulating tape on the knife. Most knives do not need to be fixed on the tool during sharpening, they are held in place by magnets and thanks to the tape they do not slip.
If you're only going to sharpen knives, you don't need to print all the parts and you can stick the magnets directly to a modified piece of board, as I've used for many years, see the photo with the black sharpener holder.
A few links to the parts I used:
For the correct orientation of the parts, look at the attached Gcode, the supports do not have to be used, but for better printing there are forced supports on the "back" part.
If you need any advice or to edit a part, please write to me.
The author marked this model as their own original creation.