thanks @jcguarneri for linking my video. watching it again, I think that is all sound advice and wouldn’t add anything off the top of my head. with skill, grafts can be made with all manner of knives, including those which are not that sharp. My mantra is skills over gear. but it certainly helps to have a good tool for the job, which is very sharp. I do think single bevel knives make some difference, but it is of minimal importance. It’s a control thing, I think having to do with the amount of surface contact between the wood and the blade, more being better. grafting isn’t always uniform pencil sized stocks. It can be 1/8 inch scions with close joints in the top of a tree, or making slashing cuts into the side of a limb above your head, making flat cuts, compound cuts, sloping cuts, matching compound cuts on stock and scion etc. etc. the thing that will serve us best in all of these situations is skill and practice with a knife. No, I can’t do all that with a cheap, dull, soft knockoff marine combat knife with a chrome plated blade that cost 14.99 at the flea market. But, almost any of it can be done with say an opinel or swiss army knife, sharpened on both sides.
I recommend the victorinox florist knife. It is cheap, highly visible (probably would have lost mine the other day if it wasn’t neon yellow), thin bladed, and comes razor sharp out of the box. It doesn’t have a bud flap lifter, but only pros might actually need that for efficiency. You can get more control with the forward inertia of a heavy knife, but it shouldn’t be necessary. It’s light, lays flat in the pocket and it just works. My favorite grafting knife was a single bevel one that I made with a file from a sawed off old hickory knife, but I lost it.
As to making flat cuts and one pass cuts… don’t expect to make every single cut in one pull. It’s nice, but very difficult to do consistently. It’s also not that important. It’s nice to make the perfect cut in one pass, but there are all sorts of thing to prevent it, from how hard the stock is, how thick and of course how much we graft. The important thing is that you end up with good fits when they are compressed. cuts can be somewhat convex, somewhat propeller shaped, etc and still fit close when squeezed. That can involve multiple passes if necessary. The closer we can get to one pull cuts the better and that shows a lot about skill, but I frequently make multiple pass cuts, “whittling” the stock down with a few cuts until it’s right. what matters is whether it fits when the pieces are put together and put under whatever pressure they are going to be put under, like nailing or wrapping.
And just a rant about mechanical grafting tools. grafting tools probably have a place in production, but they are really the antithesis of the skills over gear mentality, an expensive, bulky and inelegant solution that only fills a small portion of our needs in grafting relatively uniform stocks in a certain size range (I’m assuming, never used one). I prefer a small, light, folding, blade, 2-1/2 to 3 inches long with a single bevel and sheeps foot end. the victorinox floral knife I can put in my pocket literally all day and never notice it’s there and I’m very unlikely to need to grab any other knife to do all kinds of grafting. I not infrequently use the opinel that is in my pocket, rarely razor sharp, to do a quick graft, because I can make it work. https://youtu.be/dP-5gD3QoUA?t=1278 elegant solutions are typically better solutions. The best advice I can give any new grafter is to use knives to cut wood more. Any carving or wood cutting will build knife skills and control, but especially practicing on prunings making different types of grafts. That investment in comfort, skill and ioverall competence with knives will make much more possible and also make for much safer grafting in the awkward situations we sometimes find ourselves in facing real life situations. Skill with a knife is often the limiting factor for new grafters, not the tool, and the best tool will not make up enough for lack of skill. cutting wood with knives is fun and ti’s a skill that serves in other areas, so make some chips!
The sharpening grafting knives video I did in that series right before the safety video has pretty much everything anyone really needs to know about sharpening tools. https://youtu.be/5p3NMKPe8KM If knife use and skill is a major limiting factor in grafting, ability to sharpen is a pre-limiting factor to that. But again, that is a skill that serves broadly and is worth investing in. If you don’t have stones and don’t want to buy them, some sharpening can be done very well with fine grit emery papers glued to a small flat board. but the victorinox floral and king whetstone I recommend can be bought on amazon right now for 18.00 and 20.00 and are a good investment. If you sharpen well on the 1000 side of the king stone and strop well on a leather strop (easy to make, glue leather flesh side up on a small board) with polishing compound, that will be plenty sharp. I would also encourage people with a small thin, quality pocket knife, or other thin knife or opinel etc. to try using that instead of buying a grafting knife. but I do like my grafting knives since I do a lot of it, and I do prefer the sheeps foot for making bark slices and having more straight blade length for slashing slope cuts.