slots would allow different knife rivet holes spacing to work. I may just have to replace that screw every so often. For those who are curious, the following are the coefficients of friction for steel on these various materials: Hint, lower is better. Is this a common thing to do or your original idea? But I think it is possible as long as you can attach it securely. ), Steel Plate (I used a 7.5 x 3 inch and 6 x 2 inch piece of 1/4 inch thick steel. The materials used in the tutorial were mostly scrap materials. I have included the Tinkercad link to the knob I made for my 5/16 bolt below. It's been really handy for grinding all sorts of things when it needs to be at a specific angle. I originally wanted to put in a set screw but held off because I wasn't sure it needed it but after the test grind I think it would be very helpful. I ended up switching from hex head bolts to button bolts for the bolt post because there was not enough clearance to turn them with the Lexan plate on. Hi, love the pattern, want to make one my self, how do yuo attach the acorn nut to the back of the door hinge? But, I wanted to test out the jig at this point to just see how well it worked. Question I used a small chunk of steel, not sure the exact dimensions but probably close to 4 x 1.5 x 0.75 inches, that I bolted down to the base plate and threaded a through hole to allow the bolt to thread into. As you can see, adding any of the above plastics on the bottom will allow it to slide easier. I like the fat taper this jig puts on the material, but sometimes I use a smaller file for my material, which would require a thinner taper... Will this work for something like this? Because this jig allows you to adjust the angle, you can put as small or large of a taper as you want. I only spent $20 but with the material, it could probably double or tipple that. to reduce the thread turning easily, simply drill a cross hole to make whipper snipper cord (strimmer line) and insert a length in so it rubs on the side of the thread - if needed you can then put a smaller screew/ bolt in to increased the force of the strimmer line against the thread to further reduce moevemnt, but without marking up your thread. As we learn from this blog, sharpening a knife is easier in theory than it is in practice since the trick is creating the right angle to create the bevel that gives it a cutting edge. 4 months ago. Because the bolt post is pretty far back and I used a long bolt, I have a large degree of adjustment. 4 months ago. Depending on your need, any sized front plate would work. If you are interested, below are some ideas of potential additions. I then started searching for DIY options and came across this: Adjustable Angle Knife Grinding Jig. It is not attached. During my test grind, I found that it was easy to accidentally adjust the angle when grinding. This could be easily modified depending on what you have available. second photo of the knife blank fitted in the slot, need enough thread so it clamps knife to angle Jig without touching the knife. I can't give you a very good cost estimate because I only needed to buy the hinge and bolts/screws. If you don't have a 3D printer then you can just use a wrench , socket set or buy a knob like This One to turn it. Have you tried it on an a carving axe? Answer I then drilled a hole in each corner and countersunk it so that I could use a small flat head bolt to attach the Lexan to the bottom plate. (both ends) I will also add a spring on each side to pull the plate against the adjustment bolt to prevent it from falling forward. You could of course just put on the bolts and then the Lexan if you didn't want to switch. To be able to adjust the angle, a bolt is used that pushes against the hinge. By using a spring hinge, it pushes against the acorn nut. I have seen other designs use a plastic plate on the bottom and I though it was probably there to reduce friction but I wanted to look up the friction amounts myself just to double check. I originally used a 6 x 3 inch plate for the front plate but changed it to a 2 inch wide plate later), Steel Block (Around 4 x 1.5 x 0.75 inches), Plastic sheet to reduce friction on the bottom (must be the size of the bottom plate, 7.5 x 3 inches), Assortment of bolts (These can vary depending on what you have available. I made the jig to achieve consistent grinds on both sides of the knife without having to reposition the blade, the jig has a definite location point. By changing the placement of the rod in the hole, you can change the angle of the file "grind" Use a wingnut for one of the nuts maybe with a split washer. I like the brass rod idea. I was recently looking for a knife grinding jig so that I didn't have to free hand it if I didn't want to but they were all in the $70 to $150 range and there was no way I was going to pay that when I knew I could make one myself. I'll try it out and update this if it works well. But if you would rather, using two nuts is definitely a great option. Did you make this project? I then started searching for DIY options and came across this: Adjustable Angle Knife Grinding Jig. what was the total cost of all supplies, and what do you think about substituting those screws, (Just the ones that can be substituted) for welds? Got my vote. 11 months ago. The 2 nuts would keep it much more stable.The rest of the design seems perfect! I have not tried this on an axe to be positive but I would imagine using a larger face plate or making a fixture to attach to the smaller plate would definitely make it easier. Welding is definitely an option, I just don't have a welder yet. Reply I don't know if you missed it but if you use a spring door hinge then there is a spring integrated into the hinge with plenty of force to keep the plate against the adjustment bolt. I would think the set screw would mess up the threads after a short time. Great work! I originally had a larger mounting plate but I messed it up so I used the smaller one I was also making for it. Use a small bit of brass rod the diameter of your set screw hole. get consistent grinds every-time on both sides of the knife That's a neat idea. It was difficult to adjust the bolt by just turning the end of it so I decided to 3D print a simple knob that I glued to the bolt to make it easier to turn the bolt. I used the bottom plate as a template to drill clearance holes for the bolts for the hinge and the bolt post. 11 months ago. 4 months ago. 2. To use the jig, place a metal file under the rod and on top of the knife. The tighter the better. Now that it was mostly complete it was time to tighten the hinge and start cleaning it up. A regular hinge would require it to be attached. 1.DIY Knife Sharpening Jig. Make the brass rod length twice the diameter of the hole to keep it from turning around in the hole. Did you make this project? I was recently looking for a knife grinding jig so that I didn't have to free hand it if I didn't want to but they were all in the $70 to $150 range and there was no way I was going to pay that when I knew I could make one myself. used tools used by knife makers to aid in grinding the bevels on knives I enlarged the holes on the other bar so that the bolts would go through one bar and thread into the other. I have two ideas here: 1. Because I used the bolts that came with the hinge, the bolt end stuck out of the front of the plate. I used 12 x 6 mm bar cut to 64mm and drilled 3 holes at 5mm and tapped the middle hole through both bars and then tapped the holes on the ends on on piece only. I used a 5 inch long 5/16 bolt. Answer To set the hinge, you need to use an hex key wrench to twist the side of the hinge and then insert the small pin when you have twisted as much as possible. Thank you. 5 months ago. Like it but I will lengthen the mounting plate so the rivet holes can be used to mount the knife. This is as far as I have taken this design at this time. I made some more additions that I will show in the next steps. There should be a little gap so that the plates do not rub against the round part of the hinge when it rotates. If you have any recommendations on improvements or additions please let me know in the comments. Tip I liked how it used a spring hinge which made this simpler and more cost effective. I have access to a decent amount of scrap steel so I modified the design to be more solid and include a couple additional features. However, the plan then tells you how to set up a DIY jig that allows you to do just that, and if you want to know how, check it out for more details. As I stated before, I didn't like how big the 3 inch tall front plate was so I replaced it with a 2 inch tall plate.
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