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The Newbies Arena Are you new to knife making? Here is all the help you will need.

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  #1  
Old 11-09-2013, 09:23 AM
Hurley Hurley is offline
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Plunge line almost gone, any remedy?

I had a few minutes yesterday, so I figured I would start cleaning one of my blanks. As you can see I got a bit carried away with the 40 grit zirc belt on my plunge line. I shouldn't have done this in a hurry, but hindsight is 20/20. So is there a way to salvage this? or should I add it to my collection of screw-up trophies? Not the best pic, had to scan this.......lol batteries are dead in my camera, they take a bit to charge.

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Old 11-09-2013, 09:49 AM
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That doesn't even begin to be a serious grinding screw up. Start over by moving the plunge cut in at least a quarter inch and run the grind up much higher. That will give you a nice plunge cut but the bottom part of it will be funked up as you now see it. Come in with a small wheel and cut out the funky part by creating a small choil area under a ricasso. Done deal.

Consider losing the 40 grit belts in favor of 60's. No need to make things harder than they have to be ...


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Old 11-09-2013, 10:02 AM
Hurley Hurley is offline
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Good idea! Sounds like you talk from experience Ray, lol.


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Old 11-09-2013, 11:42 AM
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Every darned time, Keith....every time ....


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Old 11-09-2013, 11:46 AM
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PS

And next time, use a fresh belt when you begin a bevel grind (after removing the sharp corners off the edge of the blade with an old belt). You will have a lot more control of your grind with a sharp belt than with the dull one I'm guessing you used on that blade....


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Old 11-09-2013, 12:12 PM
Hurley Hurley is offline
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The belt was pretty new, but the platen on my 1x30 doesn't quite match up with the belt. It's a little over .25" off center. No matter how you adjust the tracking and you can't adjust the platen left to right at all. I may have to "adjust the platen "manually" with a grinder!


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Old 11-09-2013, 12:19 PM
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OK, I understand that the platen was part of the issue but a 'pretty new' belt isn't a fresh sharp belt. Sometimes you can get two blades out of a coarse belt, depends on a pile of factors) but basically you should use a new (that's completely new, not just 'pretty new') belt for each blade. Establishing the initial grind is the most critical part of grinding the bevels so you can't skimp there. For the finer belts you can use belts that have some mileage on them but that first one needs to be sharp ...


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Old 11-09-2013, 01:01 PM
Hurley Hurley is offline
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Gotcha......moved the grit up to NEW 80 grit (the next step up I had in zirc belts, think I have 60 but they're aluminum oxide) and found a spot hidden from view where you can move & adjust the tracking wheel back and forth. Managed to get my belt tighter by a little and squared the belt on the platen to get rid of that .25" without grinding it off. I'm good to go........well after I go do the horrid task of grocery shopping in a bit!


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Old 11-09-2013, 02:29 PM
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Now for more good news: since you're using a 1x30 and the belts are so small you will probably need a fresh belt for each side of the blade ...


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Old 11-09-2013, 05:47 PM
Hurley Hurley is offline
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It just gets better and better! My girl and I were just talking about why I always seem to pick expensive hobbies livelihoods! Until I actually complete a knife, this is just a hobby.........lol.


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Old 11-09-2013, 06:03 PM
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I think all hobbies must be expensive, at least all I've ever had were expensive it seems. Back in the 80's when a dollar was actually worth something I got interested in photography. From never having a camera in my hand to owning several top end Nikon cameras and some of the most expensive lenses they made, not to mention a Hassleblad and my own darkroom and film processing and printing equipment in less than 6 months - about $10,000 back then (equal to about $25k today).

Then, about 3 years back, I decided to take up the guitar again after a 30 year hiatus. Not exactly sure but I must be about $7k or $8k in that by this time. Might as well spend it, can't take it with you ...


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Old 11-09-2013, 07:14 PM
Hurley Hurley is offline
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Very true!


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