Wondering how you all maintain a constant angle whilst sharpening drop point style blades?
The SVM-45 jig tends to pull the angle away from the tip because of the wide "shoulders" on the rest part of the Jig.
I am thinking a really narrow rest on the jig would help to keep it in the same plane on the wheel. Or maybe a small clamp/stop style of thing on the blade and held directly against the USB??
Any tips from you guru's would be most appreciated.
Hi Crusty,
This was discussed at great length in the below thread.
With the unchanged Tormek knife jig you may get two outcomes: you either get a nice even bevel along all the edge with the edge angle increasing at the tip; or you get the same edge angle along all the edge, with the bevel height increasing at the tip.
It depends on where you clamp the blade.
check my test run below
https://forum.tormek.com/index.php?topic=2589.105 (https://forum.tormek.com/index.php?topic=2589.105)
With regular drop point knives my choice is to clamp closer to the tip rather than in the middle, and not pivot at all, just raise the handle following the taper - this way I get bevels of even height at the cost of edge increase at the tip by about 2 degrees per side.
Even bevels please my customers :)
Effect of the clamping place is described in the Tormek manual, and there was another thread by Jan, cannot find it now.
Quote from: Crusty on December 03, 2017, 01:37:20 AM
Wondering how you all maintain a constant angle whilst sharpening drop point style blades?
The SVM-45 jig tends to pull the angle away from the tip because of the wide "shoulders" on the rest part of the Jig.
I am thinking a really narrow rest on the jig would help to keep it in the same plane on the wheel. Or maybe a small clamp/stop style of thing on the blade and held directly against the USB??
Any tips from you guru's would be most appreciated.
You hit the nail on the head.
I've been alternating between two modified "jig stops"...
(https://forum.tormek.com/index.php?action=dlattach;topic=3458.0;attach=1360)
On the left is the one forum member Kavik made... he basically cut the collar off. Works pretty well, but do have to be careful it doesn't slip over the USB. (There's more info in the thread wootz referenced).
On the right, I recently discovered a 12mm "stop collar" (or "shaft collar") works just a tad better... it has a flat area that rides better on the USB.
Either one works much better for allowing me to correctly pivot and follow the blade.
Lifting the handle (as wootz described) works too... best way to get you "in the area" of where to clamp, is to measure so that the tip/belly area is approx. the same distance from the pivot as the straight portion...
(https://forum.tormek.com/index.php?action=dlattach;topic=2589.0;attach=795)
... and adjust from there. I also suggest marking the edge with a Sharpie, to insure that you're removing metal evenly along the whole edge.
Thanks for the reply's Wootz and cbwx34
I just finished reading and trying to digest that whole thread, lots of good input from everyone concerned.
I'm about to head out and try to get a stop collar or maybe just a locking hex head for the stop collar on square edge jig.
Quote from: Crusty on December 03, 2017, 01:37:20 AM
Wondering how you all maintain a constant angle whilst sharpening drop point style blades?
I use a small platform bolted to the base of the scissors jig to sharpen all of my knives. About the only thing I use the SVM-45 for is lawn mower blades or the like.
Quote from: Herman Trivilino on December 12, 2017, 01:57:40 AM
Quote from: Crusty on December 03, 2017, 01:37:20 AM
Wondering how you all maintain a constant angle whilst sharpening drop point style blades?
I use a small platform bolted to the base of the scissors jig to sharpen all of my knives. About the only thing I use the SVM-45 for is lawn mower blades or the like.
Probably not mentioned often enough...
Homemade Knife Rest (https://forum.tormek.com/index.php?topic=1592)
(Any chance you could update your photos in the thread?)
Here's the video of it...
https://www.youtube.com/watch?v=AcWAkQmoU8c
Quote from: cbwx34 on December 12, 2017, 03:05:25 AM
(Any chance you could update your photos in the thread?)
I can't find them! I'm usually careful to back up stuff, but apparently I didn't save them anywhere but on photobucket, and now they're being held for ransom.
Oh wait ... There's on old laptop up in the attic. Maybe they're on the hard drive. I will have to remember to check.
Herman,
I had no problem downloading mine from Photobucket with no cost. Did it one picture at a time as someone said it could not be done in multiples. I believe it is the third party hosting that they cut off without on-going bribe money. It did take quite awhile to get them restored here on the forum.
Quote from: Herman Trivilino on December 13, 2017, 03:12:48 AM
I can't find them! I'm usually careful to back up stuff, but apparently I didn't save them anywhere but on photobucket, and now they're being held for ransom.
Oh wait ... There's on old laptop up in the attic. Maybe they're on the hard drive. I will have to remember to check.
Quote from: Elden on December 13, 2017, 03:29:14 AM
Herman,
I had no problem downloading mine from Photobucket with no cost. Did it one picture at a time as someone said it could not be done in multiples. I believe it is the third party hosting that they cut off without on-going bribe money. It did take quite awhile to get them restored here on the forum.
Elden's right, the photos are still there... you just have to download them one at a time. :(
(And wade thru the pop-up ads). >:(
Quote from: Herman Trivilino on December 13, 2017, 03:12:48 AM
Quote from: cbwx34 on December 12, 2017, 03:05:25 AM
(Any chance you could update your photos in the thread?)
I can't find them! I'm usually careful to back up stuff, but apparently I didn't save them anywhere but on photobucket, and now they're being held for ransom.
Oh wait ... There's on old laptop up in the attic. Maybe they're on the hard drive. I will have to remember to check.
I noticed you've taken the time to work on the photo issue.
Thanks for doing that! :)
CB,
Nice work and photos. With the photo on the left of the modified Tormek stop, would it be possible to shape it square instead of rounded? If so, it would combine the surface advantage of the collar stop with the threaded adjustability of the SVM-45.
I have long felt that Herman's platform is one of the most useful and underappreciated jigs for Tormek.
Ken
Quote from: Ken S on December 30, 2017, 06:26:55 PM
CB,
Nice work and photos. With the photo on the left of the modified Tormek stop, would it be possible to shape it square instead of rounded? If so, it would combine the surface advantage of the collar stop with the threaded adjustability of the SVM-45.
I have long felt that Herman's platform is one of the most useful and underappreciated jigs for Tormek. The squared off one definitely stays on the USB better than the rounded one.
Ken
Sorta like this?
(https://forum.tormek.com/index.php?action=dlattach;topic=3458.0;attach=1520)
I left a little bit of a shoulder until I test it to see how well it stays on the USB. The squared off one definitely stays on the USB better than the rounded one. With the rounded one, I had to really pay attention to keeping it on the USB.
(https://forum.tormek.com/index.php?action=dlattach;topic=3458.0;attach=1522)
Rick
I do like the looks of that one "more better". ;) :D
Me too, that one looks much more betterer ;D
Quote from: cbwx34 on December 30, 2017, 09:40:37 PM
I do like the looks of that one "more better". ;) :D
Quote from: cbwx34 on December 30, 2017, 09:40:37 PM
I do like the looks of that one "more better". ;) :D
A while back, during the discussion on "to pivot or not", this notion came up and I liked it so I ordered several extra adjustable stops so that I could turn one round. I did't know what else might come of it is way I ordered several extras. I had ideas of trying to make something that would insert onto the USB that the stop could pivot on by some sort of pin to help keep the rounded on on the USB better. Other things came up so have not pursued it.
Rick
Quote from: Herman Trivilino on December 12, 2017, 01:57:40 AM
I use a small platform bolted to the base of the scissors jig to sharpen all of my knives. About the only thing I use the SVM-45 for is lawn mower blades or the like.
Herman,
It probably doesn't really matter, but I am curious how long your platform is. I am making one and the material that I have that is best suited is about 130 mm wide (5 1/8").
Rick
Quote from: RickKrung on January 07, 2018, 12:08:01 AM
Quote from: Herman Trivilino on December 12, 2017, 01:57:40 AM
I use a small platform bolted to the base of the scissors jig to sharpen all of my knives. About the only thing I use the SVM-45 for is lawn mower blades or the like.
Herman,
It probably doesn't really matter, but I am curious how long your platform is. I am making one and the material that I have that is best suited is about 130 mm wide (5 1/8").
Rick
I found a reference in one of your posts that the stock you started with was about 10", for making two of them and having something long enough for cutting the concavity along the front edge. I think my piece of aluminum will do. I only have 3" drum sander for making the concavity. Not as pretty, but at least it provide the relief needed. It's actually more convex than concave, but I think it will go better when I put the metal cutting belt on it.
(https://forum.tormek.com/index.php?action=dlattach;topic=3458.0;attach=1579)
A different question. Why all the way to one side of the scissors jig base? Why not in the middle?
Thanks,
Rick
Quote from: RickKrung on January 07, 2018, 12:37:12 AM
A different question. Why all the way to one side of the scissors jig base? Why not in the middle?
Thanks,
Rick
I found out why. The scissors platform interferes with the vertical USB post.
(https://forum.tormek.com/index.php?action=dlattach;topic=3458.0;attach=1581)
It doesn't when used grinding away from the knife, but the stone tends to grab the knife and pull it up.
Modified the platform to place it on the far left of the scissors platform and put it up in the "grinding into" position. Setting the angle is a little tricky. But MAN! I like this platform.
(https://forum.tormek.com/index.php?action=dlattach;topic=3458.0;attach=1583)
(https://forum.tormek.com/index.php?action=dlattach;topic=3458.0;attach=1585)
I tried it first on a really cheap knife from a thrift store. I can hardly believe how uniform the bevel is. It also just has a more natural feel to it.. The knife shown is by far the most consistent I've achieved. I was afraid of free-handing, but if this result continues, I may be in love with it.
(https://forum.tormek.com/index.php?action=dlattach;topic=3458.0;attach=1587)
Rick
Looks great!!!
Second and third knives were a bit more of a hassle. Second one was the same cheap brand as the first but was longer and more narrow. Seemed like the SB stone wasn't cutting as well. I graded it coarse, but it didn't seem to make much difference. Got it done eventually. Wasn't too bad, but I did start to notice longitudinal scratches, as if the debris from the stone and knife were getting on the platform.
(https://forum.tormek.com/index.php?action=dlattach;topic=3458.0;attach=1589)
Third on was one of my Leatherman Waves. I had a lot more trouble with it and I think it is because of the angles on the side of the blade. Up on the spine, there is a narrow part that is flat and parallel. But it was very difficult to hold the blade on that flat. I wonder if it wouldn't have worked better to have used the wider ground portion. I tried that a little towards the end. This one might be a better candidate for the knife jig.
(https://forum.tormek.com/index.php?action=dlattach;topic=3458.0;attach=1591)
More work to figure things out.
Rick
Quote from: RickKrung on January 07, 2018, 05:04:46 AM
...
Third on was one of my Leatherman Waves. I had a lot more trouble with it and I think it is because of the angles on the side of the blade. Up on the spine, there is a narrow part that is flat and parallel. But it was very difficult to hold the blade on that flat. I wonder if it wouldn't have worked better to have used the wider ground portion. I tried that a little towards the end. This one might be a better candidate for the knife jig.
(https://forum.tormek.com/index.php?action=dlattach;topic=3458.0;attach=1591)
More work to figure things out.
Rick
I would think this knife would be a better candidate for the platform? You're probably right... it would have been better to use the wider portion of the blade on the guide... I'm guessing the wheel probably tried to 'pull' the knife down toward that part of the blade anyway. (Of course, you'd need to adjust the angle of the platform to compensate).
Are the scratches on the side of the blade (especially on the 2nd knife), from the platform, or something else?
For only 3 knives... looks like it's going well though. You probably picked a harder knife (knife 3) to practice on... since it's sorta small. I wouldn't worry about the problems with it... maybe just set it aside and come back after a little more practice... I think it'll work out better.