Any one use a hollow grind attachment ??

Jack O'Neill

Jack O'Neill

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Ever since my eye surgery last year I'm finding it difficult to match my hollow grinds . I was wondering if the hollow grinding attachment might now be useful . But before spending those bucks , I thought I would ask what you folks who use them think . Anybody use them ?? . I'm not sure if I really like this Idea but I sure am tired of throwing blades across the shop .:D :eek:
 
No. If I hollow grind, it is freehand. I hollow ground in the eighties, but gave it up for better using performance. I went to flat, then to a slight convex. Hollow grinding is easy, once you get used to it a bit. Once a trough is established, it all about applying pressure where needed.
 
Sure, hollow grinding is a snap. It's getting a good even, crisp grind line that matches side to side that is a bitch. That ain't easy at all. I tried an angle vise, snapped three belts, went to freehand, and that was many, many bevels ago. I am getting close, but still have not nailed it so it comes out right every time-- and that is just the first grit. Several more to go, with disaster lurking every second....
 
Jack. I suggest you go to KnifeDogs.com and open the main general forum. On the second page you will find several approaches and a few items to use in the thread -- give me your jigs ---etc. I'm suggesting that my ideas that I've used for the past 15 years or so could work well for yoi or anyone else. go to customknifegallery.com scroll down on the left hand side and find my name . All the folder blades I have made are done with this jig. Frank
 
One came with my grinder when I bought it. I think Jantz sells them now. I use it for the rough grind before heat treat, but for finishing I grind by hand. I just recently started using it, but with it I can get a blade rough ground in about a minute, and it does make it easier when finishing that the trough is already there and perfectly straight

I don't think I'd pay $400 or whatever ridiculous price they're asking for them, though
 
How many of you grind blade down, i have a blade up/down jig but not mastered it yet.
hollowgrindfinal.jpg

Richard
 
I think you should just hollow grind one side of your blades. They look very cool and would be easier and faster than trying to match both sides. Just leave the other side flat. Dont laugh, I'm serious. I have a small folder that way but never got to finish it for other reasons. The blade is really cool.
 
Jack, I use the Hollow Grinding Made Easy jig from Jantz Supply, and it works great, but it has two measurements during setup, that are crucial to the way it works, it takes a little practice to get it right. This jig allows you to grind both sides evenly as you progress with the grind. One down side to it, is your grind height is totaly dependent on stock thickness, and edge thickness, and wheel size, I can't walk the grind line up higher using it.
Here is the link for it, and you would want the elevator attachment. They have it for different grinders also.
Hope this helps, Dale
http://jantzsupply.com/cartease/item-detail.cfm?ID=GH120

You can see it in use here, and the knife that was made with it when finished, just scroll down through the pics till you see the jig. http://whitesell-knives.webs.com/apps/blog/
 
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Thanks all for the input . I have been grinding freehand for many years now but since the surgery my left eye is worthless . It stops working after about 15 minutes of hard concentration . Makes it difficult to see the scribe lines and to reaquire the proper angle .
I appreciate everybody's comments .

Frank , thanks for the tread , interesting reading and comments . Makes me feel better on the thought of using a jig . Yours is one in its simplest form , a little table modification .
 
Tinbasher, great looking jig. Is it of your own design?
Do you primarily use it in the blade up configuration?
Chris
 
blindhogg said:
Tinbasher, great looking jig. Is it of your own design?
Do you primarily use it in the blade up configuration?
Chris
Click to expand...

Hi Chris, yes it is my design made to fit my Radius master.
You can use it either way, you just move it in or out/up down depending on the height you want.

Richard
 
Jack, Only use a jig if you really want to. Don't worry if your blades don't come out perfect anymore because you don't see as well since surgery. If you have more fun grinding freehand, then by all means go with that. I'm sure your blades will come out great nonetheless. Do what makes you happy; life is way too %&#*ing short to do it any other way.
 
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