Are expensive grinding jigs necessary? - Router Forums
 
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post #1 of 7 (permalink) Old 01-07-2008, 07:16 AM Thread Starter
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Default Are expensive grinding jigs necessary?

I hope you guys who have been grinding turning tools for decades don't take offence at this quick photo-shoot by a first-timer.
After watching Mike Darlow's DVD's on sharpening turning tools, using heaps of expensive looking jigs, he demonstrated grinding gouges and skew chisels freehand using only a simple adjustable tool rest, the sort sold everywhere and made in Taiwan. He made it look so easy that I just had to try it and wow, it really is easy as shown in the shots
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post #2 of 7 (permalink) Old 01-07-2008, 07:43 AM
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Excellent Harry. What grade of stone wheel do you use? I think a lot of guys free hand on grinders like that. I do for the skew ... but for gouges I use the wolverine jig and no way I could free hand a fancy bowl grind myself.

Corey

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post #3 of 7 (permalink) Old 01-07-2008, 07:44 AM
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I think you're right Harry, you don't need expensive jigs. I'm in the process of making jigs for sharpening. There are plenty of plans on the net for that.

The set I'm building is called King Heiple's shop-built jig. I would put a picture up of it but it may be copywright so I won't but a search through google should find it.

Hey Corey,

What angle do you use on your wolverine?

Ed......:-)

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post #4 of 7 (permalink) Old 01-07-2008, 01:56 PM
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Great results Harry. Sharpening tools must be one of the great fears for newbies but your pic sequence shows this doesn't have to be.

Pete
I've cut it twice and it's still too short! But only at one end.
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post #5 of 7 (permalink) Old 01-07-2008, 06:47 PM
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Ed, not sure what the angles are that I grind. I just adjust the long tool rest in and out and match the angle, I use black marker to tell if I am on or not. That is for the spindle gouges anyway. I don't use bowl or side grinds right now.

Corey

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post #6 of 7 (permalink) Old 01-07-2008, 07:44 PM Thread Starter
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Thanks guys, the wheel in the shots is 80 grit Aluminium Oxide and is a good all round cool running wheel but it's only a 6" grinder, I'm giving serious thought to buying an 8" with built-in light, the radius according to Mike Darlow is better suited to hollow grinding skew chisels.
A book came with the DVD's which has full size drawings to make templates for setting the tool rest for all types of turning tools. 25 and 30 deg. seems to be the most common grinding angles.

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post #7 of 7 (permalink) Old 01-07-2008, 10:42 PM
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Hi Corey,

The reason I asked is I've seen a couple of places for gouges at 50 and 60 deg. I'm going to be shaping/sharpening a new gouge when I've completed the jig but I want to make sure the angle on it is a good one.

Ed......:-)
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